Participating Airports
- Birmingham Shuttlesworth International Airport
- Bradley International Airport
- Charlotte Douglas International Airport
- Chicago Rockford International Airport
- Denver International Airport
- Kansas City International Airport (more)
- Midway International Airport
- Minneapolis-Saint Paul International Airport (more)
- Missoula Montana Airport (more)
- O'Hare International Airport
- Phoenix Sky Harbor International Airport (more)
- Seattle Tacoma International Airport
- Tulsa International Airport (more)