Merkle Airport (Hanover, IL) 3IS4 Cartes IFR (règles des instruments de vol)
| 20 | KDBQ | Dubuque Rgnl | Dubuque, IA |
| 21 | KSFY | Tri-Township | Savanna, IL |
| 26 | KOQW | Maquoketa Muni | Maquoketa, IA |
| 28 | KPVB | Platteville Muni | Platteville, WI |
| 32 | KCWI | Clinton Muni | Clinton, IA |
