| KBMI | BMI | Central Illinois Regional Airport at Bloomington-Normal | KBMI, BMI | Bloomington | 2438 m |
| KCMI | CMI | University of Illinois Willard Airport | KCMI, CMI | Champaign | 1981 m |
| KDEC | DEC | Decatur Airport | KDEC, DEC | Decatur | 2590 m |
| KMDH | MDH | Southern Illinois Airport | KMDH, MDH | Carbondale/Murphysboro | 1269 m |
| KMDW | MDW | Chicago Midway International Airport | KMDW, MDW | Chicago | 1679 m |
| KMLI | MLI | Quad City International Airport | KMLI, MLI | Moline | 1374 m |
| KORD | ORD | Chicago O'Hare International Airport | KORD, ORD | Chicago | 3962 m |
| KPIA | PIA | Greater Peoria Regional Airport | KPIA, PIA | Peoria | 2439 m |
| KRFD | RFD | Chicago Rockford International Airport | KRFD, RFD | Rockford | 2499 m |
| KSPI | SPI | Abraham Lincoln Capital Airport | KSPI, SPI | Springfield | 2438 m |
| KUIN | UIN | Quincy Regional Baldwin Field | KUIN, UIN | Quincy | 2163 m |
| KDPA | DPA | DuPage Airport | KDPA, DPA | Chicago | 2307 m |
| KPWK | PWK | Chicago Executive Airport | KPWK, PWK | Chicago | 1524 m |