In this photograph taken late Monday, Feb. 8, 2016, a Spirit Airlines craft waits to take off from a runway at Denver International Airport. (AP Photo/David Zalubowski)
Airport Security and a Broward Sherriff's Deputy keep an eye on the line at Spirit Airlines, Tuesday, May 9, 2017, at the Fort Lauderdale-Hollywood International Airport in Fort Lauderdale, Fla. Skirmishes involving irate passengers broke out at the Florida airport Monday following the cancellation of multiple Spirit Airlines flights. (Joe Cavaretta/South Florida Sun-Sentinel via AP)
FILE - In this June 12, 2010, file photo, stranded passengers stand at the Spirit Airlines ticket counter at the Fort Lauderdale-Hollywood International Airport in Fort Lauderdale, Fla. ABC News reported on May 9, 2017, that sheriff's deputies were brought in to calm angry passengers at the airport after nine Spirit flights were cancelled on May 8. (AP Photo/Lynne Sladky, File)
Spirit Airlines kicked Janae Fowler, a U.S. Army veteran, off a Houston-bound flight Saturday after fellow passengers complained about her emotional support dog. (KTRK)
In this photo taken Thursday, Jan. 9, 2014, Spirit Airlines CEO Ben Baldanza pauses as he talks to a reporter at his home, in Fort Lauderdale, Fla. (AP Photo/Alan Diaz)
In this Thursday, Jan. 9, 2014, photo, Spirit Airlines CEO Ben Baldanza pauses as he talks to a reporter at his home, in Fort Lauderdale, Fla. (AP Photo/Alan Diaz)
In this Thursday, Jan. 9, 2014, photo, Spirit Airlines CEO Ben Baldanza center, and DeAnne Gabel, director Investor relations, right, prepare to play a game of Power Grid at Baldanza's home, in Fort Lauderdale, Fla. (AP Photo/Alan Diaz)