Spirit Airlines is set to cease operations early Saturday after failing to secure a $500 million financial rescue from the federal government amid soaring jet-fuel costs triggered by geopolitical tensions. The budget carrier, a pioneer of the ultra-low-cost airline model in the U.S., had been negotiating with the Trump administration for a bailout that would have involved exchanging the cash infusion for warrants convertible into up to a 90% ownership stake. However, internal disagreements within the administration and resistance from some bondholders hindered the deal, sources familiar with the matter said.

The sharp increase in fuel prices followed President Trump’s confrontation with Iran, sending costs higher across the airline industry and pressuring carriers to raise fares and reduce routes. While major airlines such as Delta Air Lines and United Airlines Holdings are actively adjusting their business strategies to cope, low-cost carriers like Spirit have been particularly vulnerable due to heavier reliance on tight profit margins.

Spirit had been operating under Chapter 11 bankruptcy protection since last August, having exited a prior bankruptcy a few months earlier. Over that period, the airline endeavored to streamline its operations by shrinking its fleet and focusing on core markets, including Detroit, Orlando, and Fort Lauderdale. Despite offering deeply discounted fares recently in an effort to maintain customer demand, Spirit’s market share fell to approximately 3.9% of domestic travel in February, down from 5.1% a year earlier, according to Cirium, an aviation analytics firm.

President Trump expressed a willingness to intervene to save Spirit’s jobs but emphasized that any government involvement would need to constitute “a good deal.” With no bailout secured, Spirit is proceeding with plans to wind down operations and liquidate its aircraft assets. The airline currently employs thousands of workers but faces an increasingly untenable financial situation as fuel expenses continue to mount.

The airline industry as a whole is grappling with the fallout from rising fuel prices, which are expected to add billions in unplanned costs this year. American Airlines, for instance, has forecast a $4 billion increase in fuel expenses and cautioned that it might post losses in 2026. United Airlines has lowered its earnings forecast substantially, while international carriers like Air France, Cathay Pacific, and Lufthansa are similarly trimming routes to mitigate fuel-related costs.

Spirit’s challenges come after a failed attempt to be acquired by JetBlue Airways for $3.8 billion, a deal blocked in 2024 by the Justice Department over competition concerns. Since then, Spirit has been under strain from increasing competition and heavy debt, resulting in multiple attempts to restructure its business model.

In the wake of Spirit’s impending closure, competitors such as American and United are preparing to serve displaced customers. American has imposed fare caps on overlapping routes, and United is preparing support measures for passengers and employees affected by the potential shutdown.

Industry executives are resorting to familiar tactics in response to the current fuel crisis, including raising ticket prices and cutting less profitable flights. JetBlue’s President Marty St. George recently described the process as a “math exercise,” focused on maximizing margins by eliminating routes that fail to cover operational costs.

The coming days may mark the first major airline casualty linked directly to the sudden surge in fuel costs, underscoring the sensitive balance between fluctuating energy prices and the financial stability of carriers operating on thin margins.