Spirit Airlines announced Sunday it has largely completed refunding passengers and returning crew after its abrupt operational shutdown.

Most card refunds were processed by Saturday evening, with a small percentage still pending, the company stated.

Around 1,500 crew members were rebased. Other airlines offered discounted rescue fares for stranded travelers.

The low-cost airline announced early Saturday morning that it would shut down its operations immediately after 34 years in business, leaving thousands of passengers scrambling to rebook their travel on other airlines.

The company, which operated hundreds of daily flights across the U.S. and employed 17,000 people, had been in discussions with the Trump administration about a $500m rescue package, but no deal was reached.

But the effort has stalled because Spirit has been unable to secure the necessary backing from bondholders and government stakeholders, people familiar with the matter told the Wall Street Journal on Friday.

“We are proud of the impact of our ultra-low-cost model on the industry over the last 34 years and had hoped to serve our guests for many years to come,” the announcement said.

Transportation Secretary Sean Duffy held a press conference at Newark Liberty International Airport in New Jersey shortly after the annoucement to give an update on receiving refunds and employees stranded by the immediate closure. “If you have a flight scheduled with Spirit Airlines, don’t show up at the airport; there will be no one here to assist you,” he said.

“If you bought a ticket and hadn’t flown that ticket yet, the dollars you used to buy the ticket, those are held in reserve by Spirit Airlines so that money is there and so refunds will flow, we feel really comfortable that you will get a refund,” Duffy said when addressing reporters.

Other airlines, including American Airlines, are offering assistance by flying stranded Spirit crew members home free of charge.