Business Context and Reporting Period
Company: Frontier Group Holdings, Inc. (Frontier Airlines)
Filing Type: Form 10-K (Annual Report)
Reporting Period: Fiscal year ended December 31, 2025
Overview: Frontier is an ultra-low-cost carrier (ULCC) headquartered in Denver, Colorado, operating a fleet of 176 Airbus single-aisle aircraft. The company focuses on a low-cost structure, high aircraft utilization, and ancillary revenue generation. As of December 31, 2025, the company operated approximately 100 airports across the U.S. and select international destinations in the Americas.
Key Financial Metrics
| Metric | 2025 | 2024 | Change |
|---|---|---|---|
| Total Operating Revenues | $3,724 million | $3,775 million | (1)% |
| Total Operating Expenses | $3,873 million | $3,717 million | 4% |
| Net Income (Loss) | $(137) million | $85 million | N/M |
| Earnings (Loss) Per Share (Diluted) | $(0.60) | $0.37 | N/M |
| Cost per Available Seat Mile (CASM) | 9.74 cents | 9.32 cents | 5% |
| CASM (Excluding Fuel) | 7.41 cents | 6.71 cents | 10% |
| Revenue per Available Seat Mile (RASM) | 9.37 cents | 9.47 cents | (1)% |
| Load Factor | 78.4% | 76.8% | +1.6 pts |
| Total Available Liquidity | $874 million | $874 million (approx) | - |
| Total Debt (Net) | $614 million | $507 million | 21% |
Note: Liquidity consists of $654 million in unrestricted cash and $220 million in undrawn revolving credit.
Material Changes vs. Prior Period
- Profitability Decline: The company reported a net loss of $137 million in 2025, a reversal from a net income of $85 million in 2024. This was driven by a 10% increase in non-fuel expenses and a 1% decrease in revenue.
- Cost Pressures: Total operating expenses rose 4% to $3.873 billion. While fuel expenses decreased 11% (due to lower fuel prices and consumption), non-fuel costs increased 10%. Key drivers included higher aircraft rent ($73 million increase), station operations ($80 million increase), and salaries/wages ($62 million increase).
- Revenue Mix: Total revenue per passenger decreased 1% to $112.17. Ancillary revenue per passenger dropped 4% to $67.57, while fare revenue per passenger increased 4% to $44.60.
- Operational Efficiency: Average daily aircraft utilization decreased 11% to 9.2 hours, despite an 11% increase in the average aircraft in service. This reduction in utilization contributed to higher unit costs.
- Debt Structure: Total debt increased to $620 million (gross) due to new borrowings, including $105 million in Class A-1 Enhanced Equipment Trust Certificates (EETCs) and draws on Pre-delivery Credit Facilities.
Guidance, Outlook, and Risks
Management Commentary and Outlook
- Strategic Focus: Management continues to prioritize low unit costs, fleet optimization, and operational reliability. The company plans to introduce First Class seating ("First Seats") by the end of 2026 and onboard Wi-Fi by the end of 2027.
- Liquidity: The company maintains strong liquidity with $874 million available to fund operations, pre-delivery deposits (PDPs), and debt obligations.
- Product Enhancements: Recent enhancements to the FRONTIER Miles loyalty program include priority boarding and free seat upgrades for elite members to drive customer retention.
Risks and Contingencies
- IRS Excise Tax Assessment: In June 2025, the company received a revised preliminary assessment of $133 million from the IRS regarding federal excise tax on ancillary products. The company has established reserves for probable losses but is actively contesting the assessment.
- Labor Negotiations: Approximately 86% of the workforce is unionized. The company is in active negotiations with pilots (ALPA), flight attendants (AFA-CWA), and aircraft technicians (IBT). Agreements for these groups are amendable, creating uncertainty regarding future labor costs.
- Fleet and Engine Risks: The company relies on a single aircraft family (Airbus A320) and two engine suppliers (CFM International and Pratt & Whitney). Ongoing inspection programs for Pratt & Whitney GTF engines could impact operations and delivery schedules.
- Regulatory Environment: The company faces scrutiny regarding consumer protection, ancillary fee transparency, and potential changes to loyalty program regulations. Additionally, climate change regulations (CORSIA) and California climate disclosure laws (SB 253/261) present potential future costs.
Investor Verification Checklist
- IRS Excise Tax Outcome: Verify the final resolution of the $133 million IRS assessment and any potential additional liabilities or interest.
- Labor Contract Terms: Monitor the status of negotiations with pilots, flight attendants, and technicians, as new contracts could significantly impact the cost structure.
- Aircraft Utilization Trends: Assess whether the 11% drop in daily aircraft utilization is a temporary adjustment or a structural shift affecting unit cost competitiveness.
- Pratt & Whitney Engine Impact: Review operational data regarding the PW1100 GTF engine inspection program to gauge potential disruptions to capacity and maintenance costs.
- Debt Covenants: Confirm continued compliance with financial covenants, particularly the Fixed Charge Coverage Ratio (FCCR) and Loan-to-Value (LTV) tests on PDP facilities.