Spirit Airlines’ collapse has already led rivals to add 2.7 million seats across its former routes for June-August 2026. Frontier Airlines and JetBlue Airways are taking the biggest share of that traffic, but the replacement still covers only 48% of the 5.67 million seats Spirit operated in those markets a year earlier.
Frontier and JetBlue gain fastest
1.3 million seats have been added by Frontier Airlines across former Spirit markets, a roughly 70% increase that lifted Frontier’s share of available seats from 5.6% to 10.4%. JetBlue followed with more than 500,000 additional seats after announcing 11 new Fort Lauderdale destinations on the day Spirit shut down, then moving toward nearly 130 daily departures from Fort Lauderdale this summer.
334,000 seats from United Airlines, 299,000 seats from American Airlines, 134,000 seats from Breeze Airways, and 130,000 seats from Southwest Airlines fill out the rest of the rebound. Delta Air Lines’ capacity in those same markets is broadly unchanged, which leaves the overall network still 8.8% smaller than it was when Spirit was flying it last summer.
Fort Lauderdale remains short
268,000 seats below June-August 2025 levels, Fort Lauderdale remains one of the clearest gaps in the former Spirit network. Spirit had made the airport its home base, and the pace of replacement there is slower than the headline seat totals suggest.
More than 20 former Spirit routes still have no scheduled service this summer, showing that the collapse has not been fully absorbed even after competitors moved quickly into the most attractive corridors. For passengers who relied on Spirit’s network, the immediate reality is a smaller route map and fewer direct options on some of the former carrier’s most traveled markets.
Spirit’s August 2025 fall
August 2025 brought Spirit back into Chapter 11, and the carrier then grounded its fleet and began winding down operations on May 2 after failing to secure rescue financing. That left rivals to carve up the most valuable parts of a 33-year run that began in 1992, when Spirit helped pioneer the U.S. ultra-low-cost carrier model by unbundling fares and charging separately for services such as baggage and seat assignments.
2.7 million seats added across 339 former Spirit routes still leaves a large gap, and that gap is the number to watch for travelers deciding whether their old Spirit nonstop has actually returned or only been partially replaced. The market has moved fast, but not fast enough to restore the full network.
