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“Our fourth quarter results exceeded our initial expectations, and we achieved a higher total revenue and operating margin than we guided to at the beginning of the quarter,” said Dave Davis, President and Chief Financial Officer. “While fourth quarter passenger unit revenue was slightly less than flat year over year, we saw steady improvement throughout the quarter, with December scheduled service TRASM⁽³⁾ increasing over 5% year-over-year on almost 8% ASM growth. Total fare for the fourth quarter increased 2.2% and we foresee positive fare trends continuing. In addition to improving revenue trends, our successful cost control efforts continue, with full year 2024 adjusted CASM⁽⁴⁾ increasing only 1.3% over 2023. As Jude noted, we see strong first quarter 2025 bookings on mid-single digit growth in scheduled service ASMs. While we anticipate very rapid growth in our cargo segment in 2025, the timing of the new freighter deliveries should allow us to maximize scheduled service flying in the first quarter, our most profitable quarter.”

Notable Highlights

• Reached an agreement in principle on the collective bargaining agreement with flight attendants, represented by the International Brotherhood of Teamsters, and a tentative collective bargaining agreement with dispatchers, represented by the Transport Workers Union. The Company expects a ratification vote of both agreements by the end of the first quarter of 2025.

• Extended lease return dates on existing leases for three 737-900ERs. Return dates for the four 737-900s currently on lease are expected to be in May, September and November 2025 and November 2026.

• Appended a new C-tranche to our 2019-1 EETC raising $60 million, which was used in its entirety to pay down a significant portion of the term loan financing five 737-900ER aircraft. These transactions are expected to save approximately $0.8 million in interest expense in 2025.

• Took delivery of one 737-900ER off lease in November 2024. The Company expects that aircraft to enter service in July 2025.

• Awarded 2024 Low Cost Carrier of the Year award by CAPA-Centre for Aviation.

• Debuted Sun Country’s first custom-designed aircraft livery in celebration of our partnership with Minnesota Gopher Athletics.

Capacity

System block hours flown during the fourth quarter of 2024 grew by 2.7% year-over-year. All of this growth was allocated to the passenger segment, resulting in a 3.5% increase in scheduled service ASMs and a 5.0% increase in charter block hours. Cargo block hours declined in the fourth quarter by 2.5% year-over-year due to normal quarterly fluctuations in the level of flying. For the first quarter of 2025, we expect total block hour growth of to be between 7% and 9%, with Scheduled Service ASMs growing by slightly more than 7% over first quarter 2024. Cargo flying is expected to increase substantially from the second quarter of 2025 onward.

Revenue

The passenger market improved throughout the fourth quarter, which resulted in scheduled service TRASM⁽³⁾ declining by 1.0% on a 3.5% increase in scheduled service ASMs. December scheduled service TRASM⁽³⁾ increased by over 5%. The Company reported total revenue of $260.4 million for the fourth quarter, which was 6.1% greater than the fourth quarter of 2023 and the highest fourth quarter on record⁽¹⁾. The Company’s fourth quarter charter service revenue was $48.0 million, an increase of 2.3% year-over-year, despite the impact of lower fuel cost reimbursements from our customers.

In the fourth quarter of 2024, cargo revenue was the highest fourth quarter on record⁽¹⁾ at $28.6 million, a 13.1% increase versus the fourth quarter of 2023 on a 2.5% decline in cargo block hours. This improvement was primarily driven by the annual rate escalation which went into effect in mid-December 2023 and the first phase of the new Amazon contract rate increases which went into effect in June 2024.

Cost

Fourth quarter CASM fell 0.7% while adjusted CASM⁽⁴⁾ was up 7.6% year-over-year on lower ASM growth than previous quarters. Total GAAP operating expenses increased 2.6% year-over-year, on a 2.7% increase in total block hours. Other non-fuel expenses of note include maintenance, which increased 14.5%, on an increase in maintenance activity. Landing fees and airport rent increased 18.4% due to the expiration of COVID assistance that airports had used to limit rate increases in the prior year.

Balance Sheet and Liquidity

Total liquidity⁽⁵⁾ was $205.6 million on December 31, 2024, while the Company’s net debt⁽⁶⁾ was $438.2 million.

Fleet

As of December 31, 2024, the Company had 45 aircraft in its passenger service fleet, operated 12 freighter aircraft in its cargo operation and had six aircraft that are currently on lease to unaffiliated airlines.

Guidance for First Quarter 2025

Conference Call & Webcast Details

Sun Country Airlines will host a conference call to discuss its fourth quarter and full year 2024 results at 8:30 a.m. Eastern Time on Tuesday, February 4, 2025. A live broadcast of the conference call will be available via the investor relations section of Sun Country Airlines’ website at https://ir.suncountry.com/news-events/events-and-presentations. The online replay will be available on the same website approximately one hour after the call.

About Sun Country Airlines

Sun Country Airlines is a new breed of hybrid low-cost air carrier, whose mission is to connect guests to their favorite people and places, to create lifelong memories and transformative experiences. Sun Country dynamically deploys shared resources across our synergistic scheduled service, charter and cargo businesses. Based in Minnesota, we focus on serving leisure and visiting friends and relatives (“VFR") passengers and charter customers and providing cargo CMI services, with flights throughout the United States and to destinations in Mexico, Central America, Canada, and the Caribbean.

End Notes

Forward-Looking Statements

This press release contains forward-looking statements within the meaning of the U.S. Private Securities Litigation Reform Act of 1995, which involve risks and uncertainties. These forward-looking statements are generally identified by the use of forward-looking terminology, including the terms “anticipate,” “believe,” “continue,” “could,” “estimate,” “expect,” “intend,” “likely,” “may,” “plan,” “possible,” “potential,” “predict,” “project,” “should,” “target,” “will,” “would” and, in each case, their negative or other various or comparable terminology. All statements other than statements of historical facts contained in this press release, including statements regarding our strategy, future operations, future financial position, future revenue, projected costs, prospects, plans, objectives of management, and expected market growth are forward-looking statements. The forward-looking statements are relating to:

• our strategy, outlook and growth prospects;

• our operational and financial targets and dividend policy;

• general economic trends and trends in the industry and markets;

• potential repurchases of our common stock; and

• the competitive environment in which we operate.

These statements involve known and unknown risks, uncertainties and other important factors that may cause our actual results, performance, or achievements to be materially different from any future results, performance, or achievements expressed or implied by the forward-looking statements.

These forward-looking statements reflect our views with respect to future events as of the date of this press release and are based on assumptions and subject to risks and uncertainties. Given these uncertainties, you should not place undue reliance on these forward-looking statements. These forward-looking statements represent our estimates and assumptions only as of the date of this press release and, except as required by law, we undertake no obligation to update or review publicly any forward-looking statements, whether as a result of new information, future events or otherwise after the date of this press release. We anticipate that subsequent events and developments will cause our views to change. You should read this press release completely and with the understanding that our actual future results may be materially different from what we expect. Our forward-looking statements do not reflect the potential impact of any future acquisitions, mergers, dispositions, joint ventures, or investments we may undertake. We qualify all of our forward-looking statements by these cautionary statements. Additional information concerning certain factors is contained in the Company’s Securities and Exchange Commission filings, including but not limited to the Company’s Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q, and Current Reports on Form 8-K.

Non-GAAP Financial Measures

We sometimes use information that is derived from the Consolidated Financial Statements, but that is not presented in accordance with GAAP. We believe these non-GAAP measures provide a meaningful comparison of our results to others in the airline industry and our prior year results. Investors should consider these non-GAAP financial measures in addition to, and not as a substitute for, our financial performance measures prepared in accordance with GAAP. Further, our non-GAAP information may be different from the non-GAAP information provided by other companies. We believe certain charges included in our operating expenses on a GAAP basis make it difficult to compare our current period results to prior periods as well as future periods and guidance. The tables below show a reconciliation of non-GAAP financial measures used in this document to the most directly comparable GAAP financial measures.

The following table presents key operating statistics and metrics for the three months and year ended December 31, 2024 and 2023.

1 – See note 3 in End Notes
2 – See note 4 in End Notes

1 – See note 3 in End Notes
2 – See note 4 in End Notes

NON-GAAP FINANCIAL MEASURES

Adjusted Operating Income, Adjusted Operating Income Margin, Adjusted Income before Income Tax, Adjusted Pre-tax Margin, Adjusted Net Income, Adjusted Net Income per Share, Adjusted EBITDA and Adjusted EBITDA Margin

Adjusted Operating Income, Adjusted Operating Income Margin, Adjusted Income before Income Tax, Adjusted Pre-tax Margin, Adjusted Net Income, Adjusted Net Income per share, Adjusted EBITDA and Adjusted EBITDA Margin are non-GAAP measures included as supplemental disclosure because we believe they are useful indicators of our operating performance. Derivations of Operating Income and Net Income 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.

The measures described above have limitations as analytical tools. Some of the limitations applicable to these measures include: they do not reflect the impact of certain cash and non-cash charges resulting from matters we consider not to be indicative of our ongoing operations; and other companies in our industry may calculate these non-GAAP measures differently than we do, limiting each measure’s usefulness as a comparative measure. Because of these limitations, the following non-GAAP measures should not be considered in isolation or as a substitute for performance measures calculated in accordance with GAAP and may not be the same as or comparable to similarly titled measures presented by other companies due to the possible differences in the method of calculation and in the items being adjusted.

For the aforementioned reasons, Adjusted Operating Income, Adjusted Operating Income Margin, Adjusted Income before Income Tax, Adjusted Pre-tax Margin, Adjusted Net Income, Adjusted Net Income per Share, Adjusted EBITDA and Adjusted EBITDA Margin have significant limitations which affect their use as indicators of our profitability. Accordingly, readers are cautioned not to place undue reliance on this information.

Adjusted CASM

Adjusted CASM is a metric that uses a non-GAAP measure derived from CASM by excluding fuel costs, costs related to our cargo operations, stock based compensation, depreciation and amortization recognized on certain assets that generate lease income, certain commissions and other costs of selling our vacations product from this measure as these costs are unrelated to our airline operations and improve comparability to our peers. Adjusted CASM is an important measure used by management and by our board of directors in assessing quarterly and annual cost performance. Adjusted CASM is also a measure commonly used by industry analysts and we believe it is an important metric by which they compare our airline to others in the industry, although other airlines may exclude certain other costs in their calculation of Adjusted CASM. The measure is also the subject of frequent questions from investors.

Adjusted CASM excludes fuel costs. By excluding volatile fuel costs that are outside of our control from our unit metrics, we believe that we have better visibility into the results of operations and our non-fuel cost initiatives. Our industry is highly competitive and is characterized by high fixed costs, so even a small reduction in non-fuel operating costs can lead to a significant improvement in operating results. In addition, we believe that all domestic carriers are similarly impacted by changes in jet fuel costs over the long run, so it is important for management and investors to understand the impact and trends in company-specific cost drivers, such as labor rates, aircraft and maintenance costs, and productivity, which are more controllable by management.

We have excluded costs related to the cargo operations, as well as depreciation and amortization recognized on certain assets that generate lease income as these operations do not create ASMs. The Company has entered into certain transactions where we act as a lessor. As of December 31, 2024, we leased or subleased six aircraft. Depreciation and Amortization on these aircraft materially began during the three months ended June 30, 2023. Adjusted CASM further excludes special items and other adjustments, as defined in the relevant reporting period, that are not representative of the ongoing costs necessary to our airline operations and may improve comparability between periods. We also exclude stock compensation expense when computing Adjusted CASM. The Company’s compensation strategy includes the use of stock-based compensation to attract and retain employees and executives and is principally aimed at aligning their interests with those of our stockholders and long-term employee retention, rather than to motivate or reward operational performance for any period. Thus, stock-based compensation expense varies for reasons that are generally unrelated to operational decisions and performance in any period.

As derivations of Adjusted CASM 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 Adjusted CASM as presented may not be directly comparable to similarly titled measures presented by other companies. Adjusted CASM should not be considered in isolation or as a replacement for CASM. For the aforementioned reasons, Adjusted CASM has significant limitations which affect its use as an indicator of our profitability. Accordingly, readers are cautioned not to place undue reliance on this information.

CONTACT: Contacts Investor Relations Chris Allen 651-681-4810 IR@suncountry.com Media Wendy Burt 651-900-8400 mediarelations@suncountry.com