Travelers wait in line at the Southwest Airlines ticketing counter at Nashville International Airport after the airline canceled thousands of flights in Nashville, Tenn., on Dec. 27, 2022. The Department of Transportation is investigating the disaster, which led to $220 million in losses for Southwest Seth Herald/AFP via Getty Images hide caption
Stranded Southwest Airlines passengers look for their luggage in Chicago last month. Kamil Krzaczynski/AFP via Getty Images hide caption
Southwest Airlines says more than 16,700 of its flights were cancelled between Dec. 21-31, which will cost the company as much as $825 million. Kamil Krzaczynski/AFP via Getty Images hide caption
Travelers are shown lining up at the check-in counters for Southwest Airlines in Denver International Airport, Friday, Dec. 30, 2022, in Denver. David Zalubowski/AP hide caption
Travelers wait in line before passing through a security checkpoint at Denver International Airport on December 28, 2022 in Denver, Colorado. Michael Ciaglo/Getty Images hide caption
A woman walks through unclaimed bags at Southwest Airlines baggage claim at Salt Lake City International Airport on Thursday, as the carrier canceled another 2,350 flights after a winter storm overwhelmed its operations days ago. Rick Bowmer/AP hide caption
Airline staff search through unclaimed luggage at the William P. Hobby Airport on Wednesday in Houston. Brandon Bell/Getty Images hide caption
Travelers wait next to their luggage near the Southwest Airlines baggage claim area at the Nashville International Airport after the airline canceled thousands of flights in Nashville, Tenn., on Tuesday. Seth Herald/AFP via Getty Images hide caption
A flight board shows canceled flights at the Southwest Airlines terminal at Los Angeles International Airport on Monday. Eugene Garcia/AP hide caption
Southwest Airlines is conducting an internal investigation into an incident where a pilot signed off with the phrase "Let's go, Brandon," which conservatives are using to insult President Biden. Morry Gash/AP hide caption
Passengers board a Southwest Airlines airplane at Hollywood Burbank Airport in Burbank, California on October 10, 2021. The airline has continued to cancel or delay hundreds of flights on Monday. Robyn Beck/AFP via Getty Images hide caption
A systemwide outage Monday night affected Southwest Airlines flights across the country. Scott Olson/Getty Images hide caption
A man wearing a mask prepares to board a Southwest Airlines flight at Kansas City International airport in Kansas City, Mo. Southwest and American Airlines are tightening their mask requirements at the end of July by doing away with exemptions for travelers over the age of 2. Charlie Riedel/AP hide caption
All Boeing 737 Max aircraft are grounded while the manufacturer fixes a deadly defect in their flight control system. These Southwest Airlines planes were parked in Victorville, Calif., in March. Mark Ralston/AFP/Getty Images hide caption
A Southwest Airlines Boeing 737 Max lands in Victorville, Calif., in March. Matt Hartman/AP hide caption