Spirit Airlines (OTC: FLYYQ) is a U.S. ultra-low-cost carrier that operates scheduled passenger air service across a network of domestic and international routes. Revenue comes primarily from passenger ticket sales supplemented by ancillary fees for seat upgrades, baggage, and other add-on products. The airline targets value-conscious travelers, using high-density seating configurations and low fares to drive high passenger volumes and load factors. Spirit operates an all-Airbus A320 family fleet, which simplifies maintenance, training, and scheduling. Total operating revenues were $4.91 billion in FY2024 and $3.80 billion on a non-GAAP combined basis in FY2025, with passenger revenue representing the large majority of both figures. The company filed for Chapter 11 bankruptcy protection on August 29, 2025, and emerged as a successor entity. As of the 10-K filed March 16, 2026, Spirit voluntarily files Exchange Act reports with the SEC on an ongoing basis.

Revenue model

Ticket sales (passenger revenue) are the primary revenue stream, totaling $4.81 billion in FY2024 and $3.72 billion on a non-GAAP combined basis in FY2025. Ancillary and other revenue contributed $101.7 million in FY2024 and $76.9 million on a non-GAAP combined basis in FY2025. The model relies on high load factors and high-density seating to spread fixed costs across more passengers, keeping unit costs among the lowest in the U.S. airline industry.

Products and services

Scheduled passenger air service across multiple fare tiers: Value, Premium Economy, and Spirit First. Ancillary products sold alongside base fares include seat upgrades, baggage fees, and other optional add-ons. The airline operates exclusively Airbus A320 family aircraft.

Customers and end markets

Value-conscious leisure and budget travelers seeking low base fares. The business targets high passenger volumes and high load factors. Demand is seasonal, with stronger performance in the second and third quarters and during peak U.S. holiday periods.

Value-chain role

Direct air carrier operating its own flights, employing pilots, flight attendants, dispatchers, ramp service agents, and passenger service agents. Relies on third-party aircraft lessors, fuel suppliers, credit card processors, and technology vendors. Aircraft fuel represented approximately 22% of operating expenses in FY2025.

Geographic exposure

U.S. domestic and international routes. Fort Lauderdale is identified as a primary station. Specific route network geography is not detailed in the excerpts provided.

Source: SEC 10-K, filed 2026-03-16

Industry: Air Transportation, Scheduled Peers: Alaska Air Group Inc Allegiant Travel Co American Airlines Group Inc Delta Air Lines Inc Frontier Group Holdings Inc JetBlue Airways Corp Joby Aviation Inc Sun Country Airlines Holdings Inc Southwest Airlines Co United Airlines Holdings Inc