| OWK | KOWK | Central Maine Airport | Norridgewock | |
| CLS | KCLS | Centralia Airport | Chehalis | |
| ENL | KENL | Centralia Municipal Airport | Centralia | |
| - | - | Centre Airpark | Centre Hall | |
| - | - | Centre Municipal | Centre | |
| CCD | - | Century City Airport | Los Angeles | |
| CEA | KCEA | Cessna Aircraft Field | Wichita | |
| - | - | Chalet Suzanne | Lake Wales | |
| CHL | KLLJ | Challis Airport | Challis | |
| - | - | Chamberlain Municipal | Chamberlain | |
| - | - | Chamberlain Usfs | Chamberlain Guard Station | |
| - | - | Chambers Co-Winnie Stowell Airport | Winnie/Stowell | |
| - | - | Chambers County Airport | Anahuac | |
| - | - | Chambers Municipal | Lanett | |
| - | - | Chambersburg Municipal | Chambersburg | |
| - | - | Champion Executive | Orwell | |
| YKN | KYKN | Chan Gurney Airport | Yankton | |
| WCR | PALR | Chandalar Airport | Chandalar | |
| - | - | Chandalar Shelf | Chandalar Camp | |
| - | KCHD | Chandler Municipal | Chandler | |
| - | KCQB | Chandler Municipal | Chandler | |
| - | - | Chaplin | Cambridge | |
| - | KCNC | Chariton Municipal | Chariton | |
| CCY | KCCY | Charles City Municipal Airport | Charles City | |
| - | - | Charleston Municipal | Charleston | |
| - | KCXE | Chase City Municipal | Chase City | |
| - | - | Chase Co | Cottonwood Falls | |
| NIR | - | Chase Field Naval Air Station | Beeville | |
| - | - | Chase Jr Memorial | Dover Foxcroft | |
| - | KCQX | Chatham Municipal | Chatham | |
| CYM | - | Chatham Sea Plane Base | Chatham | |
| - | - | Chattanooga Sky Harbor | Chattanooga | |
| - | KSLH | Cheboygan Co | Cheboygan | |
| - | - | Chehalem | Newberg | |
| - | - | Chelan Municipal | Chelan | |
| - | - | Chemehuevi Valley | Chemehuevi Valley | |
| CEX | - | Chena Hot Springs Airport | Chena Hot Springs | |
| - | - | Chenega Bay | Chenega | |
| HCW | - | Cheraw Airport | Cheraw | |
| KCN | - | Chernofski Sea Plane Base | Chernofski | |
| - | - | Cherokee Co | Canton | |
| - | KJSO | Cherokee Co | Jacksonville | |
| - | - | Cherokee Municipal | Cherokee | |
| - | KCKP | Cherokee Municipal | Cherokee | |
| CKK | - | Cherokee Village Airport | Cherokee Village | |
| - | - | Cherry Ridge | Honesdale | |
| - | - | Cherry Springs | Galeton | |
| - | - | Chester | Chester | |
| - | - | Chester Municipal | Chester | |
| - | KFCI | Chesterfield Co | Richmond | |