| ORD |
Chicago O’Hare International |
Chicago |
IL |
| MSP |
Minneapolis-St. Paul International |
Minneapolis |
MN |
| DTW |
Detroit Metropolitan Wayne County |
Detroit |
MI |
| STL |
Lambert-St. Louis International |
St. Louis |
MO |
| MCI |
Kansas City International |
Kansas City |
KS |
| CLE |
Cleveland-Hopkins International |
Cleveland |
OH |
| MKE |
General Mitchell International |
Milwaukee |
WI |
| IND |
Indianapolis International |
Indianapolis |
IN |
| CVG |
Cincinnati/Northern Kentucky International |
Covington/Cincinnati |
KY |
| OMA |
Eppley Airfield |
Omaha |
NE |
| SDF |
Louisville International-Standiford Field |
Louisville |
KY |
| DAY |
James M. Cox Dayton International |
Dayton |
OH |
| GRR |
Gerald R. Ford International |
Grand Rapids |
MI |
| DSM |
Des Moines International |
Des Moines |
IA |
| ICT |
Wichita Mid-Continent |
Wichita |
KS |
| CID |
Eastern Iowa |
Cedar Rapids |
IA |
| FNT |
Bishop International |
Flint |
MI |
| FAR |
Hector International |
Fargo |
ND |
| SGF |
Springfield-Branson National |
Springfield |
MO |
| PIA |
General Downing – Peoria International |
Peoria |
IL |
| FWA |
Fort Wayne International |
Fort Wayne |
IN |
| LAN |
Capital Region International |
Clinton (Township of) |
MI |
| GFK |
Grand Forks International |
Grand Forks |
ND |
| RFD |
Chicago/Rockford International |
Rockford |
IL |
| TOL |
Toledo Express |
Toledo |
OH |
| YIP |
Willow Run |
Detroit |
MI |
| LCK |
Rickenbacker International |
Columbus |
OH |