Spirit Airlines abruptly shut down operations on Saturday, canceling thousands of flights and leaving passengers stranded at airports across the country. The budget carrier ceased operations with little advance notice to customers, who arrived at airports to find empty check-in counters and unavailable customer service lines.

The airline's closure left thousands of travelers scrambling to rebook flights on other carriers or find alternative transportation. Many passengers reported receiving no warning from the airline before arriving at airports, discovering the shutdown only upon arrival at their departure gates.

Spirit's financial troubles had been mounting for years, but rising jet fuel prices delivered a final blow to the airline's struggling budget model. The surge in fuel costs created additional strain on the carrier's already weakened financial position, ultimately forcing the company to cease operations.

Following the shutdown, Spirit Airlines has been working to process refunds for affected customers. The company reported that most customers have been refunded for canceled flights, and staff members have returned to work to handle the aftermath of the closure.

The shutdown has highlighted broader challenges facing the airline industry, as rising fuel costs continue to impact carriers across the sector. Other airlines are also grappling with the effects of increased operational expenses amid volatile energy markets.