• Frontier (73.1 percent)
  • JetBlue (73.5 percent)
  • United (75.2 percent)
  • American (77.4 percent)
  • Allegiant (78.7 percent)
  • Spirit (79.5 percent)
  • Southwest (80.2 percent)
  • Alaska (81.3 percent)
  • Delta (84 percent)