Frontier Group Holdings, Inc.: Form 10-Q for the period ended Mar 31, 2026

The following discussion and analysis of our financial condition and results of operations should be read in conjunction with our condensed consolidated financial statements and the related notes included elsewhere in this Quarterly Report on Form 10-Q, as well as Part II, Item 7. “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and Part II, Item 8. “Financial Statements and Supplementary Data” included in our Annual Report on Form 10-K for the fiscal year ended December 31, 2025, which was filed with the SEC on February 18, 2026 (the “2025 Annual Report”).

Recent Developments

Macroeconomic Conditions. In February 2026, the Supreme Court ruled that the International Emergency Economic Powers Act (“IEEPA”) does not give the President the authority to impose tariffs and therefore any tariffs imposed by President Trump under the IEEPA were not authorized. Subsequently, the Trump Administration imposed a new 10% across-the-board surcharge on imports. Additionally, effective September 2025, the United States and European Union reached a trade agreement. The agreement, among other changes, included an exemption on tariffs for aircraft and aircraft parts. We continue to monitor the situation and the related impacts to our business.

These or additional changes in U.S. or international trade policies, along with continued uncertainty surrounding such policies, could lead to further weakened business conditions for the transportation industry, which may adversely impact our operations through increased supply chain challenges, commodity price volatility and a decline in discretionary spending and consumer confidence, among other impacts.

Recent geopolitical tensions and military conflict in the Middle East, including developments involving Iran, have contributed to volatility in global energy markets. Higher crude oil prices can increase our jet fuel costs, which we experienced during the three months ended March 31, 2026. In addition, related instability may create supply chain challenges affecting aircraft parts and other operational inputs. Continued uncertainty or further escalation could pressure our operating costs and negatively affect our financial performance. We continue to monitor the situation and the related impacts to our business.

Labor. We are currently in negotiations with the unions which represent our pilots, flight attendants, and aircraft technicians regarding their next labor contracts. Please refer to “Notes to Condensed Consolidated Financial Statements — 8. Commitments and Contingencies” for additional information.

Legal/Regulatory. During 2025, we obtained a revised preliminary assessment in the amount of $133 million related to the applicability of federal excise tax to certain optional ancillary products and services. We established reserves for certain fees subject to the assessment where we believe a loss for this matter is probable and estimable and we are contesting the assessment.

We previously received an immaterial audit assessment from the U.S. Transportation Security Administration (the “TSA”) that covered the third quarter of 2016 through the fourth quarter of 2018 and related to the remittance of TSA fees where flight credits expired unused (the “2016-2018 Audit”). We appealed this assessment to the United States Tenth Circuit Court of Appeals. In addition, we are under audit by the TSA for the period from the fourth quarter of 2019 through the fourth quarter of 2022 (the “2019-2022 Audit”). In April 2026, we lost our appeal regarding the 2016-2018 Audit and received a preliminary assessment for the 2019-2022 Audit in the amount of $42 million, which mainly covered remittance of TSA fees where flight credits expired unused as well as for other passengers that purchased tickets and did not travel. As of March 31, 2026, we recorded an additional estimated liability of $77 million (the “TSA Reserve”), which is largely related to remittance of TSA fees for passengers that purchased tickets and did not travel and is included in other current liabilities and other long-term liabilities on our condensed consolidated balance sheets and in passenger revenues within our condensed consolidated statements of operations. We could be subject to further TSA audit examinations and resulting assessments.

Fleet. In March 2026, we entered into an agreement (the “Early Return Agreement”) to terminate the leases associated with 24 A320neo aircraft, expected to be completed by the second quarter of 2026. For the three months ended March 31, 2026, we recognized $139 million of operating expenses related to the Early Return Agreement, which includes one-time charges for lease return costs and costs related to the write-off of non-recoverable capitalized prepaid maintenance and accelerated depreciation of capitalized maintenance. Please refer to “Notes to Condensed Consolidated Financial Statements — 6. Operating Leases” for additional information.

Overview

The following table provides select financial and operational information for the three months ended March 31, 2026 and 2025 (in millions):

Revenues

Total operating revenues for the three months ended March 31, 2026 totaled $992 million, an increase of 9% compared to the three months ended March 31, 2025. Revenue per available seat mile (“RASM”), increased by 10% driven by a 2% increase in total revenue per passenger as compared to the corresponding prior year period, alongside a 3.5-point increase in load factor. Capacity, as measured by ASMs, for the three months ended March 31, 2026, as compared to the three months ended March 31, 2025, decreased by 1%.

Adjusted RASM, a non-GAAP measure, increased from $9.17 during the three months ended March 31, 2025 to $10.86 during the three months ended March 31, 2026. For the three months ended March 31, 2026, this excludes the impact of $73 million related to the TSA Reserve associated with prior periods. There were no adjustments for the three months ended March 31, 2025.

Operating Expenses

Total operating expenses during the three months ended March 31, 2026 increased to $1,275 million, resulting in a cost per available seat mile (“CASM”) of 13.00¢, an increase of 35%, as compared to the three months ended March 31, 2025. Fuel expense for the three months ended March 31, 2026 was $30 million higher than the corresponding prior year period. The 13% increase in fuel expense for the three months ended March 31, 2026 was primarily driven by the 13% increase in fuel cost per gallon.

Our non-fuel expenses increased by 40% during the three months ended March 31, 2026, as compared to the corresponding prior year period, driven primarily by expenses related to the Early Return Agreement, higher rent expense due to increased lease return costs and larger fleet, and higher employee costs. CASM (excluding fuel), a non-GAAP measure, increased 42% to 10.27¢, on a 1% decrease in capacity, for the three months ended March 31, 2026, as compared to the corresponding prior year period, due to the aforementioned drivers of increased non-fuel expenses.

Adjusted CASM (excluding fuel), a non-GAAP measure, increased from 7.24¢ for the three months ended March 31, 2025 to 8.85¢ for the three months ended March 31, 2026. For the three months ended March 31, 2026, this excludes the impact of $139 million in expenses relating to the Early Return Agreement. There were no adjustments for the three months ended March 31, 2025.

Net Income (Loss)

We generated a net loss of $272 million during the three months ended March 31, 2026, compared to net loss of $43 million for the three months ended March 31, 2025. Considering the aforementioned non-GAAP adjustments and related $8 million of tax impacts, our adjusted net loss, a non-GAAP measure, was $68 million for the three months ended March 31, 2026. There were no non-GAAP adjustments for the three months ended March 31, 2025.

For the reconciliation to the corresponding GAAP measures of the aforementioned non-GAAP adjusted measures, see “Results of Operations — “Reconciliation of GAAP to Non-GAAP Financial Data.”, “Reconciliation of Passenger Revenue to Adjusted Passenger Revenue”, and “Results of Operations — Reconciliation of Net Income (Loss) to Adjusted Net Income (Loss), Pre-Tax Income (Loss) to Adjusted Pre-Tax Income (Loss), and Net Income (Loss) to EBITDA, EBITDAR, Adjusted EBITDA, and Adjusted EBITDAR.”

Liquidity

As of March 31, 2026, our total available liquidity was $974 million, consisting of $754 million of unrestricted cash and cash equivalents and availability under our revolving line of credit (the “Revolving Loan Facility”).

Results of Operations

Three Months Ended March 31, 2026 Compared to Three Months Ended March 31, 2025

Operating Revenues

(a) This metric is not calculated in accordance with GAAP. For the reconciliation to the corresponding GAAP measures of the aforementioned non-GAAP adjusted measures, see “Reconciliation of GAAP to Non-GAAP Financial Data.”

Total operating revenue increased $80 million, or 9%, during the three months ended March 31, 2026 compared to the three months ended March 31, 2025. Revenue was favorably impacted by the 10% increase in RASM, driven by a 2% increase in total revenue per passenger as compared to the corresponding prior year period, alongside a 3.5-point increase in load factor. Revenue was unfavorably impacted by $77 million related to the TSA Reserve during the three months ended March 31, 2026. In addition, capacity, as measured by ASMs, for the three months ended March 31, 2026, as compared to the three months ended March 31, 2025, decreased by 1% primarily due to a 12% decrease in average daily aircraft utilization partially offset by the 14% increase in average aircraft in service.

Operating Expenses

(a) Cost per ASM figures may not recalculate due to rounding.

(b) These metrics are not calculated in accordance with GAAP. For the reconciliation to the corresponding GAAP measures of the aforementioned non-GAAP adjusted measures, see “Reconciliation of GAAP to Non-GAAP Financial Data.”

Aircraft Fuel. Aircraft fuel expense increased by $30 million, or 13%, during the three months ended March 31, 2026, as compared to the three months ended March 31, 2025. The increase was due to a 13% increase in fuel cost per gallon.

Salaries, Wages and Benefits. Salaries, wages and benefits expense increased by $22 million, or 9%, during the three months ended March 31, 2026, as compared to the three months ended March 31, 2025. The increase was primarily due to higher crew costs, as compared to the corresponding prior year period.

Aircraft Rent. Aircraft rent expense increased by $104 million, or 65%, during the three months ended March 31, 2026, as compared to the three months ended March 31, 2025, primarily due to additional lease return expense, in part related to the Early Return Agreement, and a larger fleet.

Station Operations. Station operations expense increased by $12 million, or 7%, during the three months ended March 31, 2026, as compared to the three months ended March 31, 2025, primarily due to an increase in airport cost sharing arrangements and a 6% increase in passengers.

Maintenance, Materials and Repairs. Maintenance, materials and repair expense increased by $91 million, or 178%, during the three months ended March 31, 2026, as compared to the three months ended March 31, 2025. This increase was primarily due to the write-off on non-recoverable prepaid maintenance balances related to the Early Return Agreement and the 14% increase in average aircraft in service, which resulted in higher aircraft repair and materials costs.

Sales and Marketing. Sales and marketing expense increased by $2 million, or 5%, during the three months ended March 31, 2026, as compared to the three months ended March 31, 2025, primarily due to an increase in credit card fees, partially offset by a decrease in third-party distribution channel fees. The following table presents our distribution channel mix:

Depreciation and Amortization. Depreciation and amortization expense increased by $42 million, or 210%, during the three months ended March 31, 2026, as compared to the three months ended March 31, 2025, primarily due to the accelerated depreciation on capitalized maintenance costs related to the Early Return Agreement and the increase in capitalized maintenance depreciation due to our growing fleet.

Other Operating Expense. Other operating expenses increased by $14 million, or 78%, during the three months ended March 31, 2026, as compared to the three months ended March 31, 2025. This increase was primarily driven by the decrease in sale-leaseback gains, as a result of 7 aircraft inductions compared to 4 aircraft inductions and 2 engine inductions in the corresponding prior year period subject to sale-leaseback transactions, and an increase in travel costs.

Other Income (Expense). Other income decreased by $4 million, or 67%, during the three months ended March 31, 2026, as compared to the three months ended March 31, 2025. The decrease was primarily due to increased interest expense, driven by higher principal balances on our debt from the addition of the class A-1 enhanced equipment trust certificates (the “2025-1 EETCs”) and decreased interest income from lower interest rates on interest-bearing cash accounts.

Income Taxes. Our effective tax rate for the three months ended March 31, 2026 was a benefit of 3.2%, compared to an expense of 7.5% for the three months ended March 31, 2025, on pre-tax loss for each of the respective periods. The primary difference between the effective tax rate and the federal statutory rate for the three months ended March 31, 2026 was related to the increase in our valuation allowance relating to U.S. federal and state net operating loss. Please refer to “Notes to Condensed Consolidated Financial Statements — 10. Income Taxes” for additional information.

Reconciliation of GAAP to Non-GAAP Financial Data

($ in millions)

($ in millions)

(a) Revenue and cost per ASM figures may not recalculate due to rounding.

(b) We received a court ruling relating to the remittance of TSA fees for unused travel covering the 2016-2018 Audit that resulted in a $73 million charge, the TSA Reserve, that covers probable losses in prior years subject to audit that were recorded during the three months ended March 31, 2026. See “Notes to the Condensed Consolidated Financial Statements — 8. Commitments and Contingencies” and “Reconciliation of Passenger Revenue to Adjusted Passenger Revenue” for additional information.

(c) Adjusted RASM is included as a supplemental disclosure because we believe it is a useful metric to properly compare our revenue performance to our peers, as RASM metrics are well-recognized performance measurements in the airline industry that are frequently used by our management, as well as by investors, securities analysts and other interested parties in comparing the operating performance of companies in the airline industry. Additionally, we believe this metric is useful because it removes certain items that may not be indicative of our base operating performance or future results. Adjusted RASM is not determined in accordance with GAAP, may not be comparable across all carriers and should not be considered in isolation or as a substitute for performance measures calculated in accordance with GAAP.

(d) CASM (excluding fuel) and Adjusted CASM (excluding fuel) are included as supplemental disclosures because we believe that excluding aircraft fuel is useful to investors as it provides an additional measure of management’s performance excluding the effects of a significant cost item over which management has limited influence. The price of fuel, over which we have limited control, impacts the comparability of period-to-period financial performance, and excluding the price of fuel allows management an additional tool to understand and analyze our non-fuel costs and core operating performance, and increases comparability with other airlines that also provide a similar metric. CASM (excluding fuel) and Adjusted CASM (excluding fuel) are not determined in accordance with GAAP and should not be considered in isolation or as a substitute for performance measures calculated in accordance with GAAP.

(e) We entered into the Early Return Agreement to early terminate the leases associated with 24 A320neo aircraft and as a result incurred non-recurring charges of $139 million in the first quarter of 2026. The $139 million includes $73 million related to the write-off of non-recoverable capitalized prepaid maintenance balances recorded in maintenance, materials and repairs; $37 million of accelerated depreciation expense related to the remeasurement of useful lives of capitalized maintenance; $35 million of lease return costs recorded in aircraft rent and $(6) million of a reversal of previously accrued lease return costs. See “Notes to Condensed Consolidated Financial Statements — 6. Operating Leases” for additional information.

(f) Adjusted CASM is included as supplemental disclosure because we believe it is a useful metric to properly compare our cost management and performance to other peers, as derivations of Adjusted CASM are well-recognized performance measurements in the airline industry that are frequently used by our management, as well as by investors, securities analysts and other interested parties in comparing the operating performance of companies in the airline industry. Additionally, we believe this metric is useful because it removes certain items that may not be indicative of our base operating performance or future results. Adjusted CASM is not determined in accordance with

GAAP, may not be comparable across all carriers and should not be considered in isolation or as a substitute for performance measures calculated in accordance with GAAP.

(g) Adjusted CASM including net interest and CASM including net interest are included as supplemental disclosures because we believe they are useful metrics to properly compare our cost management and performance to other peers that may have different capital structures and financing strategies, particularly as it relates to financing primary operating assets such as aircraft and engines. Additionally, we believe Adjusted CASM including net interest is useful because it removes certain items that may not be indicative of our base operating performance or future results. Adjusted CASM including net interest and CASM including net interest are not determined in accordance with GAAP, may not be comparable across all carriers and should not be considered in isolation or as a substitute for performance measures calculated in accordance with GAAP.

Reconciliation of Passenger Revenue to Adjusted Passenger Revenue

($ in millions)

($ in millions)

(a) Revenue per passenger figures may not recalculate due to rounding.

(b) See “Reconciliation of GAAP to Non-GAAP Financial Data” above for discussion of adjusting items.

(c) Adjusted fare revenue, adjusted non-fare revenue, adjusted other revenue, adjusted ancillary and adjusted total revenue, and respective metrics per passenger, (collectively, “revenue per passenger”) are included as supplemental disclosures because we believe they are useful metrics to properly compare our revenue performance to our peers, as revenue per passenger metrics are well-recognized performance measurements in the airline industry that are frequently used by our management, as well as by investors, securities analysts and other interested parties in comparing the operating performance of companies in the airline industry. Additionally, we believe these metrics are useful because they remove certain items that may not be indicative of our base operating performance or future results. These metrics are not determined in accordance with GAAP, may not be comparable across all carriers and should not be considered in isolation or as a substitute for performance measures calculated in accordance with GAAP.

Reconciliation of Net Income (Loss) to Adjusted Net Income (Loss), Pre-Tax Income (Loss) to Adjusted Pre-Tax Income (Loss), and Net Income (Loss) to EBITDA, EBITDAR, Adjusted EBITDA, and Adjusted EBITDAR

(in millions)

(a) Adjusted pre-tax income (loss), adjusted net income (loss), EBITDA and adjusted EBITDA are included as supplemental disclosures because we believe they are useful indicators of our operating performance. Derivations of pre-tax income (loss), net income (loss) and EBITDA are well-recognized performance measurements in the airline industry that are frequently used by our management, as well as by investors, securities analysts and other interested parties in comparing the operating performance of companies in our industry.

Adjusted pre-tax income (loss), adjusted net income (loss), EBITDA and adjusted EBITDA have limitations as analytical tools. Some of the limitations applicable to these measures include: adjusted pre-tax income (loss), adjusted net income (loss), EBITDA and adjusted EBITDA do not reflect the impact of certain cash charges resulting from matters we consider not to be indicative of our ongoing operations; adjusted pre-tax income (loss), adjusted net income (loss), EBITDA and adjusted EBITDA do not reflect our cash expenditures, or future requirements, for capital expenditures or contractual commitments; EBITDA and adjusted EBITDA do not reflect changes in, or cash requirements for, our working capital needs; EBITDA, and adjusted EBITDA do not reflect the interest expense, or the cash requirements necessary to service interest or principal payments on our indebtedness; although depreciation and amortization are non-cash charges, the assets being depreciated and amortized will often have to be replaced in the future, and EBITDA and adjusted EBITDA do not reflect any cash requirements for such replacements; and other companies in our industry may calculate adjusted pre-tax income (loss), adjusted net income (loss), EBITDA and adjusted EBITDA differently than we do, limiting their usefulness as comparative measures. Because of these limitations, adjusted pre-tax income (loss), adjusted net income (loss), EBITDA and adjusted EBITDA should not be considered in isolation from or as a substitute for performance measures calculated in accordance with GAAP. In addition, because derivations of adjusted pre-tax income (loss), adjusted net income (loss), EBITDA and adjusted EBITDA are not determined in accordance with GAAP, such measures are susceptible to varying calculations and not all companies calculate the measures in the same manner. As a result, derivations of pre-tax income (loss), net income (loss) and EBITDA, including adjusted pre-tax income (loss), adjusted net income (loss) and adjusted EBITDA, as presented may not be directly comparable to similarly titled measures presented by other companies.

For the foregoing reasons, each of adjusted pre-tax income (loss), adjusted net income (loss), EBITDA and adjusted EBITDA has significant limitations which affect its use as an indicator of our profitability. Accordingly, you are cautioned not to place undue reliance on this information.

(b) EBITDAR and adjusted EBITDAR are included as supplemental disclosures because we believe them to be useful solely as valuation metrics for airlines as their calculations isolate the effects of financing in general, the accounting effects of capital spending and acquisitions (primarily aircraft, which may be acquired directly, directly subject to acquisition debt, by capital lease or by operating lease, each of which is presented differently for accounting purposes), and income taxes, which may vary significantly between periods and for different airlines for reasons unrelated to the underlying value of a particular airline. However, EBITDAR and adjusted EBITDAR are not determined in accordance with GAAP, are susceptible to varying calculations and not all companies calculate the measure in the same manner. As a result, EBITDAR and adjusted EBITDAR, as presented, may not be directly comparable to similarly titled measures presented by other companies. In addition, EBITDAR and adjusted EBITDAR should not be viewed as measures of overall performance since they exclude aircraft rent, which is a normal, recurring cash operating expense that is necessary to operate our business. Accordingly, you are cautioned not to place undue reliance on this information.

(in millions)

(a) See “Reconciliation of GAAP to Non-GAAP Financial Data” above for discussion of adjusting items.

(b) Represents lease termination costs and write-off of non-recoverable capitalized maintenance costs associated with the Early Return Agreement. See “Notes to Condensed Consolidated Financial Statements — 6. Operating Leases” for additional information.

(c) Represents lease termination costs related to aircraft rent associated with the Early Return Agreement. See “Notes to Condensed Consolidated Financial Statements — 6. Operating Leases” for additional information.

Comparative Operating Statistics

The following table sets forth our operating statistics for the three months ended March 31, 2026 and 2025. These operating statistics are provided because they are commonly used in the airline industry and, as such, allow readers to compare our performance against our results for the corresponding prior year period, as well as against the performance of our peers.

31

(a) Figures may not recalculate due to rounding. See “Glossary of Airline Terms” for definitions of terms used in this table.

(b) These metrics are not calculated in accordance with GAAP. For the reconciliation to corresponding GAAP measures, see “Results of Operations—Reconciliation of GAAP to Non-GAAP Financial Data.”

(c) Stage-Length Adjusted (SLA) to 1,000 miles: Applicable Operating Statistic * Square root (stage length / 1,000).

Liquidity and Capital Resources

Overview

As of March 31, 2026, our total available liquidity was $974 million, consisting of $754 million of unrestricted cash and cash equivalents and $220 million of funds available to be drawn under our undrawn Revolving Loan Facility. We had $583 million of total debt, net, of which $240 million is short-term and consists primarily of amounts outstanding under our Pre-delivery Credit Facilities. Our total debt, net is comprised of $298 million outstanding under our Pre-delivery Credit Facilities, $119 million outstanding under our pre-purchased miles facility with Barclays Bank Delaware (“Barclays”), $105 million of 2025-1 EETCs and $66 million in 10-year notes (collectively, the “PSP Promissory Notes”) from the U.S. Department of the Treasury (the “Treasury”), partially offset by $5 million in deferred debt acquisition costs.

In connection with the term loan facility entered into with the Treasury in September 2020, which was repaid in full in February 2022, and the PSP Promissory Notes, we issued warrants (the “Warrants”) to purchase 3,117,940 shares of FGHI common stock at a weighted-average price of $6.95 per share. In June 2024, the Treasury sold all such Warrants to a financial institution. During the three months ended March 31, 2026, 103,208 warrants expired and no warrants were exercised. As of March 31, 2026, warrants to purchase 134,066 shares of FGHI common stock were outstanding and set to expire by June 2026.

We continue to monitor our covenant compliance with various parties, including, but not limited to, our lenders and credit card processors. As of the date of this report, we are in compliance with all of our covenants.

The following table presents the major indicators of our financial condition and liquidity as of:

($ in millions)

Use of Cash and Future Obligations

We expect to meet our cash requirements for the next twelve months through use of our available cash and cash equivalents, our Pre-delivery Credit Facilities, cash flows from operating activities and sale-leaseback financing. We expect to meet our long-term cash requirements with cash flows from operating and financing activities, including, but not limited to, potential future borrowings under the Pre-delivery Credit Facilities, our undrawn Revolving Loan Facility and/or potential issuances of debt or equity. The Revolving Loan Facility also permits us to enter into additional indebtedness secured by our loyalty program and brand-related assets, to the extent such indebtedness is pari passu to that of the Revolving Loan Facility. Our primary uses of cash are for working capital, aircraft PDPs, debt repayments, and capital expenditures.

Our single largest capital commitment relates to the acquisition of aircraft. As of March 31, 2026, we operated a total of 183 aircraft under operating leases. PDPs relating to future deliveries under our agreement with Airbus are required at various times prior to each aircraft’s delivery date. As of March 31, 2026, our Pre-delivery Credit Facilities, which allow us to draw up to an aggregate of $326 million, had $298 million outstanding. As of March 31, 2026, we had $383 million of PDPs held by Airbus which have been partially financed by our Pre-delivery Credit Facilities.

As of March 31, 2026, we had a firm obligation to purchase 161 A320neo family aircraft and 20 additional spare engines to be delivered by 2033. Of our aircraft commitments, 23 had committed operating leases for deliveries occurring between 2026 and 2029. We intend to evaluate financing options for the remaining aircraft.

The following table summarizes current and long-term material cash requirements as of March 31, 2026, which we expect to fund primarily with operating and financing cash flows (in millions):

(a) Includes principal commitments only associated with our Pre-delivery Credit Facilities with borrowings as of March 31, 2026, our affinity card unsecured debt due through 2029, the PSP Promissory Notes through 2031, and our class A-1 enhanced equipment certificate through 2032. See “Notes to Condensed Consolidated Financial Statements — 5. Debt.”

(b) Represents interest and commitment fees on debt obligations and our undrawn Revolving Loan Facility.

(c) Represents gross cash payments related to our operating fixed lease obligations that are not subject to discount as compared to the obligations measured on our condensed consolidated balance sheets. Also includes lease return obligations related to the Early Return Agreement. See “Notes to Condensed Consolidated Financial Statements — 6. Operating Leases.”

(d) Represents purchase commitments for aircraft and engines. See “Notes to Condensed Consolidated Financial Statements — 8. Commitments and Contingencies.”

Cash Flows

The following table presents information regarding our cash flows in the three months ended March 31, 2026 and 2025 (in millions):

Operating Activities

During the three months ended March 31, 2026, net cash provided by operating activities totaled $40 million, which was driven by $78 million of non-cash adjustments and $234 million of inflows from changes in operating assets and liabilities, partially offset by a $272 million net loss.

The $234 million of inflows from changes in operating assets and liabilities included:

• $256 million in increases in other liabilities primarily driven by the TSA Reserve, cash received for supplier incentives, increased leased aircraft return accruals related to the Early Return Agreement, and increases to other operational related accruals;
• $107 million in increases in our air traffic liability primarily driven by increased bookings on higher average fares and volume; and
• $5 million in increases in accounts payable; partially offset by
• $82 million in increases in other long-term assets primarily driven by increases in capitalized maintenance and prepaid maintenance;
• $33 million in increases in accounts receivable; and
• $19 million in increases in supplies and other current assets.

Our net loss of $272 million was also adjusted by the following non-cash items to arrive at cash provided by operating activities:

• $104 million in adjustments for the Early Return Agreement primarily related to non-cash impacts from non-recoverable capitalized prepaid maintenance and accelerated depreciation;
• $25 million in depreciation and amortization; and
• $5 million in stock-based compensation expense; partially offset by
• $47 million in gains recognized on sale-leaseback transactions and;
• $9 million in deferred income tax expense.

During the three months ended March 31, 2025, net cash used in operating activities totaled $86 million, which was driven by a $43 million net loss, $28 million of non-cash adjustments and $15 million of outflows from changes in operating assets and liabilities.

The $15 million of outflows from changes in operating assets and liabilities included:

• $49 million in increases in other long-term assets primarily driven by increases in capital maintenance and prepaid maintenance;
• $24 million in decreases in other liabilities primarily driven by leased aircraft return accruals and other operational related accruals offset by increased passenger taxes payable;
• $16 million in increases in accounts receivable; partially offset by
• $64 million in increases in our air traffic liability primarily driven by increased bookings on higher average fares;
• $6 million in decreases in supplies and other current assets; and
• $4 million in increases in accounts payable.

Our net loss of $43 million was also adjusted by the following non-cash items to arrive at cash used in operating activities:

• $56 million in gains recognized on sale-leaseback transactions; partially offset by
• $20 million in depreciation and amortization;
• $5 million in stock-based compensation expense; and
• $3 million in deferred income tax expense.

Investing Activities

During the three months ended March 31, 2026, net cash provided by investing activities totaled $33 million, driven by:

• $45 million in net inflows for PDP activity; partially offset by
• $12 million in cash outflows for capital expenditures.

During the three months ended March 31, 2025, net cash used in investing activities totaled $29 million, driven by:

• $18 million in cash outflows for capital expenditures; and
• $11 million in net outflows for PDP activity.

Financing Activities

During the three months ended March 31, 2026, net cash provided by financing activities was $28 million, driven by:

• $62 million in net proceeds received from sale-leaseback transactions;
• $51 million in cash proceeds from debt issuances, consisting of $33 million drawn on our Pre-delivery Credit Facilities and $18 million in draws on our Barclays facility; partially offset by
• $83 million in cash outflows from principal repayments on debt related to our Pre-delivery Credit Facilities; and
• $2 million in cash outflows for payments related to tax withholdings of share-based awards.

During the three months ended March 31, 2025, net cash provided by financing activities was $61 million, primarily driven by:

• $52 million in net proceeds received from sale-leaseback transactions;
• $33 million in cash proceeds from debt issuances, consisting of $32 million of net borrowings on our Pre-delivery Credit Facilities, and $1 million in draws on our Barclays facility;
• $6 million in proceeds from the exercise of stock options; partially offset by
• $28 million in cash outflows from principal repayments on the Pre-delivery Credit Facilities; and
• $2 million in cash outflows for payments related to tax withholdings of share-based awards.

As of March 31, 2026, we did not have any off-balance sheet arrangements that have or are reasonably likely to have a current or future material effect on our results of operations, financial condition or cash flows.

Critical Accounting Policies and Estimates

There have been no material changes in our critical accounting policies and estimates during the three months ended March 31, 2026. For information regarding our critical accounting policies and estimates, see “Management's Discussion and Analysis of Financial Condition and Results of Operations—Critical Accounting Policies and Estimates” included in Part II, Item 7 of our 2025 Annual Report.

Recently Adopted Accounting Pronouncements

See “Notes to Consolidated Financial Statements —1. Summary of Significant Accounting Policies” included in Part II, Item 8 of our 2025 Annual Report for a discussion of recent accounting pronouncements.

GLOSSARY OF AIRLINE TERMS

Set forth below is a glossary of industry terms:

“A320 family” means, collectively, the Airbus series of single-aisle aircraft, including the A320ceo, A320neo, A321ceo and A321neo aircraft.

“A320neo family” means, collectively, the Airbus series of single-aisle aircraft that feature the new engine option, including the A320neo and A321neo aircraft.

“Adjusted CASM” is a non-GAAP measure and means operating expenses, excluding special items, divided by ASMs. For a discussion of such special items and a reconciliation of CASM to CASM (excluding fuel), Adjusted CASM (excluding fuel), Adjusted CASM, Adjusted CASM including net interest and CASM including net interest, please see “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Results of Operations.”

“Adjusted CASM including net interest” or “Adjusted CASM + net interest” is a non-GAAP measure and means the sum of Adjusted CASM and net interest expense (income) excluding special items divided by ASMs. For a discussion of such special items and a reconciliation of CASM to CASM (excluding fuel), Adjusted CASM (excluding fuel), Adjusted CASM, Adjusted CASM including net interest and CASM including net interest, please see “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Results of Operations.”

“Adjusted CASM (excluding fuel)” is a non-GAAP measure and means operating expenses less aircraft fuel expense, excluding special items, divided by ASMs. For a discussion of such special items and a reconciliation of CASM to CASM (excluding fuel), Adjusted CASM (excluding fuel), Adjusted CASM, Adjusted CASM including net interest and CASM including net interest, please see “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Results of Operations.”

“Adjusted RASM” is a non-GAAP measure and means total revenues, excluding special items, divided by ASMs. For a discussion of such special items and a reconciliation of RASM to adjusted RASM, please see “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Results of Operations.”

“Air traffic liability” means the value of tickets, unearned membership fees, customer rights to book future travel and other related fees sold in advance of travel.

“Ancillary revenue” means the sum of non-fare passenger revenue and other revenue.

“Available seat miles” or “ASMs” means seats (empty or full) multiplied by miles the seats are flown.

“Average aircraft in service” means the average number of aircraft used in flight operations, as calculated on a daily basis.

“Average daily aircraft utilization” means block hours divided by number of days in the period divided by average aircraft in service.

“Average stage length” means the average number of miles flown per flight segment.

“Block hours” means the number of hours during which the aircraft is in revenue service, measured from the time of gate departure before take-off until the time of gate arrival at the destination.

“CASM” or “unit costs” means operating expenses divided by ASMs.

“CASM (excluding fuel)” is a non-GAAP measure and means operating expenses less aircraft fuel expense, divided by ASMs.

“CASM including net interest” or “CASM + net interest” is a non-GAAP measure and means the sum of CASM and net interest expense (income) divided by ASMs.

“DOT” means the U.S. Department of Transportation.

“Fare revenue” consists of base fares for air travel, including miles redeemed under our frequent flyer program, unused and expired passenger credits, and revenue derived from charter flights.

“Fare revenue per passenger” means fare revenue divided by passengers.

“Load factor” means the percentage of aircraft seat miles actually occupied on a flight (RPMs divided by ASMs).

“Net interest expenses (income)” means interest expense, capitalized interest, interest income and other.

“Non-fare passenger revenue” consists of fees related to certain ancillary items such as baggage, service fees, seat selection, and other passenger-related revenue that is not included as part of base fares for travel.

“Non-fare passenger revenue per passenger” means non-fare passenger revenue divided by passengers.

“Other revenue” consists primarily of services not directly related to providing transportation, such as the advertising, marketing and brand elements of the FRONTIER Miles affinity credit card program, and commissions revenue from the sale of items such as rental cars and hotels.

“Other revenue per passenger” means other revenue divided by passengers.

“Passengers” means the total number of passengers flown on all flight segments.

“Passenger revenue” consists of fare revenue and non-fare passenger revenue.

“PDP” means pre-delivery deposit payments, which are payments required by aircraft manufacturers in advance of delivery of the aircraft.

“RASM” or “unit revenue” means total revenue divided by ASMs.

“Revenue passenger miles” or “RPMs” means the number of miles flown by passengers.

“Total ancillary revenue per passenger” means ancillary revenue divided by passengers.

“Total revenue per passenger” means the sum of fare revenue, non-fare passenger revenue, and other revenue (collectively, “Total Revenue”) divided by passengers.

“TSA” means the U.S. Transportation Security Administration.

There have been no material changes in market risk from the information provided in Part II, Item 7A. “Quantitative and Qualitative Disclosures About Market Risk”, in our 2025 Annual Report, other than as described below with respect to aircraft fuel as a result of recent geopolitical tensions which have contributed to volatility in the global energy markets. The adverse effects of changes in these markets could pose a potential loss as discussed below. The sensitivity analysis provided does not consider the effects that such adverse changes may have on overall economic activity, nor does it consider additional actions we may take to mitigate our exposure to such changes. Actual results may differ.

Aircraft Fuel. Our results of operations can vary materially due to changes in the price and availability of aircraft fuel and are also impacted by the number of aircraft in use and the number of flights we operate. Aircraft fuel represented approximately 21% and 25% of total operating expenses for the three months ended March 31, 2026 and 2025, respectively. Unexpected changes in the pricing of aircraft fuel or a shortage or disruption in the supply of aircraft fuel could have a material adverse effect on our business, results of operations and financial condition. Based on our fuel consumption during the three months ended March 31, 2026, a hypothetical 10% increase in the average price per gallon of aircraft fuel would have increased aircraft fuel expense by approximately $27 million.

Evaluation of Disclosure Controls and Procedures

Management, with the participation of our principal executive officer and principal financial officer, evaluated the effectiveness of our disclosure controls and procedures as of March 31, 2026. The term “disclosure controls and procedures,” as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act of 1934, as amended (the “Exchange Act”), refers to the controls and other procedures of a company that are designed to ensure that information required to be disclosed by a company in the reports that it files or submits under the Exchange Act is recorded, processed, summarized and reported, within the time periods specified in the SEC’s rules and forms. Disclosure controls and procedures include, without limitation, controls and procedures designed to ensure that information required to be disclosed by a company in the reports that it files or submits under the Exchange Act is accumulated and communicated to the company’s management, including its principal executive and principal financial officers, or persons performing similar functions, as appropriate to allow timely decisions regarding required disclosure. Based on such evaluation, our principal executive officer and principal financial officer concluded that, as of March 31, 2026, our disclosure controls and procedures were effective at the reasonable assurance level.

Changes in Internal Control Over Financial Reporting

During the three months ended March 31, 2026, there were no changes in our internal control over financial reporting that materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

There have been no material changes to the risk factors disclosed in Item 1A “Risk Factors” contained in our 2025 Annual Report. Investors are urged to review all such risk factors carefully.