Spirit Airlines announced early Saturday it will immediately wind down, canceling all flights and ending the company's three-decade run as a pioneer of budget air travel. The carrier, with roughly 17,000 employees and contractors, told passengers that refunds for credit or debit card bookings will be processed automatically. Those who booked through travel agents must contact them directly, while voucher, credit, or loyalty-point purchases will be addressed later through bankruptcy proceedings.

The shutdown marks the first death of a major U.S. airline in decades, according to reports. Spirit had already filed for bankruptcy twice and failed to secure a government bailout that could have kept it flying. Its demise underscores the fragility of ultra-low-cost carriers in a market increasingly dominated by larger competitors.

Passengers seeking updates were directed to SpiritRestructuring.com. The company stressed that only those who paid with credit or debit cards are guaranteed immediate refunds. The fate of employees and contractors remains unclear, though the wind-down suggests widespread layoffs.

The collapse leaves a gap in the budget travel market, potentially driving up fares on routes Spirit once dominated. Travelers holding future bookings now face uncertainty, especially those relying on vouchers or points. The broader industry will watch for ripple effects on competitors like Frontier and Allegiant.

Industry analysts had flagged Spirit's debt load and razor-thin margins as unsustainable. The carrier's failure to secure a rescue plan ultimately sealed its fate.