| Code Airport | Name | City | Country |
| BMI | Normal Airport | Bloomington, IL | United States |
| CHI | Chicago Airports | Chicago, IL | United States |
| CMI | Univ Of Illinois Willard Arpt | Champaign, IL | United States |
| DEC | Decatur Municipal | Decatur, IL | United States |
| DNV | Vermillion Cty | Danville, IL | United States |
| ENL | Centralia Municipal Arpt | Centralia, IL | United States |
| ZRF | Peoria Rockford Bus Terminal | Rockford, IL | United States |
| RFD | Rockford Arpt | Rockford, IL | United States |
| SPI | Capital Airport | Springfield, IL | United States |
| SQI | Whiteside Cty Municipal | Sterling, IL | United States |
| UGN | Memorial Arpt | Waukegan, IL | United States |
| UIN | Baldwin Field | Quincy, IL | United States |
| VYS | Illinois Valley Regional Arpt | Peru, IL | United States |
| MTO | Coles County | Mattoon, IL | United States |
| MVN | Mt Vernon Outland Arpt | Mt Vernon, IL | United States |
| MWA | Williamson County | Marion, IL | United States |
| ORD | OHare Intl Arpt | Chicago, IL | United States |
| PIA | Greater Peoria Arpt | Peoria, IL | United States |
| PWK | Pal Waukee Arpt | Chicago, IL | United States |
| GBG | Galesburg Arpt | Galesburg, IL | United States |
| IJX | Jacksonville Municipal Arpt | Jacksonville, IL | United States |
| IKK | Greater Kankakee Arpt | Kankakee, IL | United States |
| MDH | Southern Illinois Arpt | Carbondale, IL | United States |
| MDW | Midway | Chicago, IL | United States |
| MLI | Quad City Arpt | Moline, IL | United States |