| ALASKA | Cold Bay | PORT MOLLER |
| COLORADO | COS | CITY OF COLORADO SPRINGS MUNI |
| FLORIDA | COF | PATRICK AFB |
| FLORIDA | COI | MERRITT ISLAND |
| IDAHO | COE | COEUR DALENE AIR TERMINAL |
| MINNESOTA | COQ | CLOQUET CARLTON CO |
| MISSOURI | COU | COLUMBIA RGNL |
| NEW HAMPSHIRE | CON | CONCORD MUNI |
| TEXAS | COT | COTULLA-LA SALLE CO |
| TEXAS | COM | COLEMAN MUNI |
| WYOMING | COD | CODY YELLOWSTONE RGNL |