United CEO Predicts Collapse of Spirit Airlines, Declares End of Ultra‑Low‑Cost Era

United Airlines Chief Executive Scott Kirby set off an industry debate last week when he predicted the collapse of Spirit Airlines and said the era of ultra‑low‑cost flying was drawing to a close.

Kirby made the remarks during an onstage question‑and‑answer session with industry journalist Brian Sumers at the Airline Passenger Experience Association conference in Long Beach, California, criticizing business models built on low base fares and repeated ancillary charges. “You can't have a business model that customers hate. You can't have a business model predicated on ‘screw the customer,’” he said, and when asked why he believed Spirit would fail he quipped, “Because I'm good at math.” The comments followed similar criticism he offered at an aviation event in Washington, D.C., earlier in the week.

Spirit Airlines responded publicly on social media, where its official account on X posted, “Scott is finally right about something — it is all about customers,” and emphasized its product changes by saying, “Our Guests love low fares, especially our new Spirit First and Premium Economy options. Maybe that's why United executives can't stop yapping about us.” The exchange highlighted tensions between legacy network carriers and ultra‑low‑cost carriers (ULCCs) over pricing strategies and customer service.

Spirit, the Florida‑based carrier known for its bright yellow planes, has endured a turbulent 12 months. It first filed for Chapter 11 protection in November after years of losses, failed merger talks and rising debt, emerged from bankruptcy in March under a creditor‑approved restructuring that wiped out existing shares and transferred ownership to lenders, and then filed for Chapter 11 again in August after failing to make significant changes during its prior reorganization.

Under the restructuring, control moved to Spirit’s creditors, which include investment funds managed by firms such as Citadel Advisors. The carrier now carries about $2.4 billion in long‑term debt, much of it due in 2030, and reported negative free cash flow of roughly $1 billion at the end of the second quarter. As part of recent cost‑cutting measures, Spirit furloughed about 270 pilots and downgraded the status of another 140.

Spirit rejected a proposed takeover by fellow budget carrier Frontier last month, arguing that Frontier’s offer provided less value for Spirit’s creditors than the bankruptcy restructuring. The two carriers had earlier explored a merger in 2022; JetBlue later offered a higher bid and won shareholder support, but the Department of Justice sued to block that merger on antitrust grounds and a judge agreed, prompting JetBlue to withdraw.

Industry observers say the U.S. market includes a range of low‑fare models. Frontier and Sun Country are typically categorized with Spirit as ULCCs, while carriers such as Southwest, JetBlue and Allegiant advertise lower fares but are often described as more customer‑friendly in their approach to ancillary fees and service.

Spirit has not returned to sustained annual profitability for many years, and executives have cited pandemic‑era disruptions, competitive pressure and legacy cost structures as contributing factors. The carrier’s repeated filings have revived concerns about consolidation and competition in U.S. air travel, and about the prospects for leisure routes that rely heavily on low fares.

Other smaller carriers have also faced financial distress in recent months: Silver Airways filed for Chapter 11 in December and continues to restructure operations serving Florida and Caribbean destinations.

Kirby’s comments and Spirit’s financial trajectory underscore a broader industry debate over pricing strategy and customer relations. Legacy carriers have long criticized ULCC models for relying on low headline fares and heavy ancillary revenues, arguing those tactics create dissatisfied customers and unstable economics. ULCC executives counter that low fares expand demand and that ancillary products offer customers choice.

As Spirit proceeds through its second Chapter 11 and stakeholders weigh restructuring options, regulators, creditors and competitors will watch closely for how the carrier’s fate affects capacity, fares and competition on leisure routes. United’s CEO framed his comments as an assessment of business sustainability; Spirit’s owners and management have emphasized ongoing efforts to stabilize the airline and advance product changes intended to attract and retain customers.