| Coles County Memorial Airport | Mattoon | MTO · KMTO | 3 |
| College Park Airport | College Park | CGS · KCGS | 1 |
| Colorado Air and Space Port | Denver | KCFO | 2 |
| Colorado Creek Airport | Colorado Creek | KCR | 1 |
| Colorado Plains Regional Airport | Akron | AKO · KAKO | 1 |
| Columbia Airport | Columbia | COA | 4 |
| Columbia County Airport | Hudson | HCC | 1 |
| Columbus Airport | Columbus | CUS | 1 |
| Columbus Lowndes County Airport | Columbus | UBS · KUBS | 1 |
| Compton Woodley Airport | Compton | CPM · KCPM | 2 |
| Converse County Airport | Douglas | DGW · KDGW | 2 |
| Cooperstown-Westville Airport | Cooperstown | COP | 1 |
| Copper Center 2 Airport | Copper Center | CZC | 1 |
| Corcoran Airport | Corcoran | CRO | 1 |
| Cordova Municipal Airport | Cordova | CKU | 2 |
| Cortland County Chase Field | Cortland | CTX | 1 |
| Cottonwood Airport | Cottonwood | CTW | 1 |
| Cotulla-La Salle County Airport | Cotulla | COT · KCOT | 1 |
| Coulter Field | Bryan | CFD · KCFD | 2 |
| Council Airport | Council | CIL | 1 |
| Council Bluffs Municipal Airport | Council Bluffs | CBF · KCBF | 2 |
| Craig Field | Selma | SEM · KSEM | 1 |
| Craig Moffat Airport | Craig | CIG · KCAG | 1 |
| Cram Field | Burwell | BUB · KBUB | 1 |
| Crane County Airport | Crane | CCG | 3 |
| Crane Island Airstrip | Crane Island | CKR | 0 |
| Creech Air Force Base | Indian Springs | INS · KINS | 2 |
| Crested Butte Airpark | Crested Butte | CSE | 1 |
| Creston Municipal Airport | Creston | CSQ · KCSQ | 2 |
| Crookston Municipal Kirkwood Field | Crookston | CKN · KCKN | 2 |
| Cross City Airport | Cross City | CTY · KCTY | 2 |
| Crystal Airport | Minneapolis | MIC · KMIC | 3 |
| Culberson County Airport | Van Horn | VHN · KVHN | 2 |
| Cushing Municipal Airport | Cushing | CUH · KCUH | 4 |
| Dade Collier Training and Transition Airport | Miami | TNT · KTNT | 1 |
| Dahl Creek Airport | Dahl Creek | DCK | 1 |
| Dahlgren Naval Surface Warfare Center Airport | Dahlgren | DGN · KNDY | 1 |
| Dallas Executive Airport | Dallas | RBD · KRBD | 2 |
| Dalton Municipal Airport | Dalton | DNN · KDNN | 1 |
| Dansville Municipal Airport | Dansville | DSV · KDSV | 1 |
| Dare County Regional Airport | Manteo | MEO · KMQI | 2 |
| Davenport Municipal Airport | Davenport | DVN · KDVN | 2 |
| David Wayne Hooks Memorial Airport | Houston | DWH · KDWH | 3 |
| Dayton-Wright Brothers Airport | Dayton | MGY · KMGY | 1 |
| Decatur County Industrial Air Park | Bainbridge | BGE · KBGE | 2 |
| Decorah Municipal Airport | Decorah | DEH · KDEH | 1 |
| Defiance Memorial Airport | Defiance | DFI · KDFI | 1 |
| Delaware Coastal Airport | Georgetown | GED · KGED | 2 |
| Delta Junction Airport | Delta Junction | DJN | 2 |
| Delta Municipal Airport | Delta | DTA · KDTA | 2 |
| Denali National Park Airport | Denali Park | MCL · PAIN | 1 |
| Denison Municipal Airport | Denison | DNS · KDNS | 2 |
| Detroit Lakes Airport | Detroit Lakes | DTL · KDTL | 2 |
| Dewitt Field - Old Town Municipal Airport | Old Town | OLD · KOLD | 3 |
| Dexter B Florence Memorial Field | Arkadelphia | KADF | 1 |
| Dillon Airport | Dillon | DLN · KDLN | 2 |
| Dillon County Airport | Dillon | DLL · KDLC | 1 |
| Dimmit County Airport | Carrizo Springs | CZT · KCZT | 1 |
| Dinwiddie County Airport | Petersburg | PTB · KPTB | 2 |
| Dodge County Airport | Juneau | UNU · KUNU | 2 |
| Donaldson Field Airport | Greenville | GDC · KGYH | 1 |
| Door County Cherryland Airport | Sturgeon Bay | SUE · KSUE | 2 |
| Douglas Municipal Airport | Douglas | DGL · KDGL | 2 |
| Downtown Skyport Heliport | New York | JRB | 1 |
| Doylestown Airport | Doylestown | DYL · KDYL | 1 |
| Drift River Airport | Kenai | DRF | 2 |
| Drummond Airport | Drummond | DRU | 1 |
| Drummond Island Airport | Drummond Island | DRE · KDRM | 2 |
| Dubois Municipal Airport | Dubois | DBS | 1 |
| Dunsmuir Muni-Mott Airport | Dunsmuir | MHS | 1 |
| Eagle Air Park | Brazoria | BZT | 1 |
| Eagle Lake Airport | Eagle Lake | ELA · KELA | 1 |
| Eagle River Union Airport | Eagle River | EGV · KEGV | 2 |
| Eastern Slopes Regional Airport | Fryeburg | FRY · KIZG | 1 |
| Eastland Municipal Airport | Eastland | ETN · KETN | 1 |
| Easton Airport / Newnam Field | Easton | ESN · KESN | 2 |
| Easton State Airport | Easton | ESW · KESW | 1 |
| Ed Carlson Memorial Field South Lewis County Airport | Toledo | TDO · KTDO | 1 |
| Ed-Air Airport | Oaktown | OTN | 1 |
| Ekuk Airport | Ekuk | KKU | 1 |
| Ekwok Airport | Ekwok | KEK | 1 |
| El Reno Regional Airport | El Reno | RQO | 2 |
| Elizabeth Field | Fishers Island | FID | 2 |
| Elk City Regional Business Airport | Elk City | ELK · KELK | 1 |
| Elkhart Municipal Airport | Elkhart | EKI · KEKM | 3 |
| Ellamar Seaplane Base | Ellamar | ELW | 1 |
| Emporia Municipal Airport | Emporia | EMP · KEMP | 2 |
| Enid Woodring Regional Airport | Enid | WDG · KWDG | 2 |
| Enterprise Municipal Airport | Enterprise | ETS · KEDN | 1 |
| Entrance Island Seaplane Base | Entrance Island | HBH | 1 |
| Ephrata Municipal Airport | Ephrata | EPH · KEPH | 3 |
| Errol Airport | Errol | ERR · KERR | 1 |
| Essex County Airport | Caldwell | CDW · KCDW | 2 |
| Estherville Municipal Airport | Estherville | EST · KEST | 2 |
| Eunice Airport | Eunice | UCE | 1 |
| Eureka Airport | Eureka | EUE | 1 |
| Eveleth–Virginia Municipal Airport | Eveleth | EVM · KEVM | 3 |
| Everett-Stewart Regional Airport | Union City | UCY · KUCY | 1 |
| Fairbury Municipal Airport | Fairbury | FBY · KFBY | 2 |
| Fairfield Municipal Airport | Fairfield | FFL · KFFL | 2 |