| Site | Code |
|---|---|
| ANDERSON MUNICIPAL | KAID |
| COLUMBUS/BALKALAR & | KBAK |
| BLOOMINGTON/MONROE | KBMG |
| ELKHART MUNICIPAL | KEKM |
| EVANSVILLE REGIONAL | KEVV |
| EAGLE CREEK AIRPARK | KEYE |
| FORT WAYNE/BAER FLD | KFWA |
| GRISSOM AFB/PERU | KGUS |
| GARY REGIONAL | KGYY |
| HUNTINGBURG | KHNB |
| TERRE HAUTE/HULMAN& | KHUF |
| INDIANAPOLIS INTL | KIND |
| LAFAYETTE/PURDUE U | KLAF |
| MUNCIE/JOHNSON FLD | KMIE |
| SOUTH BEND/ST. JOE | KSBN |