Spirit Airlines died overnight Saturday, and within hours every major US airline had new flight plans ready to go.
Months of quiet prep, sitting in a drawer until the day Spirit was officially gone. That kind of speed only happens when the industry sees a collapse coming.
Spirit had filed for its second bankruptcy in less than a year. It was aiming to emerge from that bankruptcy in mid-2026 with help from a Trump administration loan of up to $500 million, but talks fell apart late last week.
Some of the new flights start this week, with JetBlue moving fastest at Spirit's Fort Lauderdale home base where it had been the second-biggest carrier. JetBlue is adding nonstops from Fort Lauderdale to Chicago, Detroit, Houston, Nashville, and Indianapolis, plus new routes to Colombia, Puerto Rico, and the Dominican Republic.
JetBlue is also boosting capacity from Fort Lauderdale to Austin, DFW, and Raleigh-Durham.
"We're stepping up for Fort Lauderdale to ensure the availability of air service in this market," JetBlue President Marty St. George said in a release.
Breeze Airways is rolling out a new Atlantic City to Charleston flight, plus year-round service to Raleigh-Durham and Tampa.
United picked up roughly 14,000 stranded Spirit fliers on Saturday alone, while Southwest scooped up more than 20,000. Both, along with American and Frontier, capped fares for travelers left holding worthless tickets, while Spirit said it would automatically process refunds for affected customers.
"If you fly with us during this time, I think you'll love what comes with your ticket on the world's largest airline," United chief customer officer David Kinzelman wrote to incoming Spirit fliers Saturday.
Spirit was tiny by industry standards at just 1.5% of US domestic flying capacity for the summer. But Barclays analyst Brandon Oglenski says the impact will stretch well beyond those routes.
With one less competitor pricing aggressively, the rest of the industry gets pricing power back. The result: higher fares not just on Spirit's old routes, but on flights all over the country.
That comes on top of fuel-driven price hikes already hitting the industry this year, after the US-Israel attacks on Iran sent jet fuel costs higher.
Spirit's death is the loudest signal yet that fuel costs are killing the budget carrier model. The reason: low-cost airlines don't have the credit card or corporate travel revenue that bigger airlines lean on when fuel prices spike.
The country's famous budget carrier had been bleeding cash for years before this weekend, weighed down by problems both inside and outside management's control. The Iran war fuel surge was the final blow.
Frontier, Spirit's one-time merger partner and another low-cost carrier, reports earnings Tuesday, where investors will want to hear how Frontier plans to avoid the same fate.
Tuesday's earnings call will be the next test for the budget carrier model.