| - | - | Creekside | Holcomb | |
| - | - | Creighton Municipal | Creighton | |
| - | - | Crescent Lake State | Crescent Lake | |
| - | - | Crescent Valley | Crescent Valley | |
| - | - | Crest | Kent | |
| CSE | - | Crested Butte Airport | Crested Butte | |
| CSQ | KCSQ | Creston Municipal Airport | Creston | |
| - | KCEK | Crete Municipal | Crete | |
| - | - | Creve Coeur Airport | St Louis | |
| - | - | Crewe Municipal | Crewe | |
| RTN | KRTN | Crews Field | Raton | |
| - | - | Crisfield Municipal | Crisfield | |
| - | KCKF | Crisp Co-Cordele | Cordele | |
| - | - | Crivitz Municipal | Crivitz | |
| CKN | KCKN | Crookston Municipal Airport | Crookston | |
| - | - | Crooksville | Crooksville | |
| - | - | Crosby Municipal | Crosby | |
| - | - | Crosby Municipal | Crosby | |
| - | - | Crosbyton Municipal | Crosbyton | |
| CTY | KCTY | Cross City Airport | Cross City | |
| - | - | Cross Keys | Cross Keys | |
| - | - | Cross Winds | Clayton | |
| - | - | Crownpoint | Crownpoint | |
| MIC | KMIC | Crystal Airport | Minneapolis | |
| - | - | Crystal City Municipal | Crystal City | |
| - | - | Crystal Lake | Decatur | |
| - | KCGC | Crystal River | Crystal River | |
| - | KUBX | Cuba Municipal | Cuba | |
| CUW | - | Cube Cove Airport | Cube Cove | |
| - | - | Cuchara Valley Apt At La Veta | La Veta | |
| CUX | - | Cuddihy Field | Corpus Christi | |
| - | - | Cuero Municipal | Cuero | |
| - | - | Culmerville | Culmerville | |
| - | KUBE | Cumberland Municipal | Cumberland | |
| WBN | - | Cummings Park Airport | Woburn | |
| - | - | Cure | Sunfield | |
| - | - | Currant Ranch | Currant | |
| - | - | Currituck Co | Currituck | |
| BBD | KBBD | Curtis Field | Brady | |
| - | - | Curtis Municipal | Curtis | |
| - | - | Cushing | Newark | |
| CUH | KCUH | Cushing Municipal Airport | Cushing | |
| - | KTTF | Custer | Monroe | |
| - | KCUT | Custer Co | Custer | |
| - | - | Custer State Park | Fairburn | |
| - | - | Cuthbert-Randolph | Cuthbert | |
| - | - | Cynthiana-Harrison Co | Cynthiana | |
| - | - | Cypress River | Jefferson | |
| - | - | Dabbs | Sumter | |
| - | - | Dacy | Harvard | |