| - | - | Chetek Mun-Southworth | Chetek | |
| - | KSYF | Cheyenne Co Municipal | St Francis | |
| - | - | Cheyenne Eagle Butte | Eagle Butte | |
| CHK | KCHK | Chickasha Municipal Airport | Chickasha | |
| KBW | - | Chignik Bay Airport | Chignik | |
| - | - | Chignik Lake | Chignik Lake | |
| CDS | KCDS | Childress Airport | Childress | |
| - | - | Chilhowee | Benton | |
| - | KCHT | Chillicothe Municipal | Chillicothe | |
| CHZ | - | Chiloquin State Airport | Chiloquin | |
| - | - | Chim Commercial | Minersville | |
| JCC | - | China Basin Heliport | San Francisco | |
| - | KNID | China Lake Naws | Ridgecrest | |
| - | - | Chinle Municipal | Chinle | |
| - | - | Chiriaco Summit | Chiriaco | |
| CZN | - | Chisana Field | Chisana | |
| CZO | - | Chistochina Airport | Chistochina | |
| CXC | - | Chitina Airport | Chitina | |
| CIV | - | Chomley Airport | Chomley | |
| - | - | Chorman | Farmington | |
| - | KCII | Choteau | Choteau | |
| - | - | Chowchilla | Chowchilla | |
| - | - | Christmas Valley | Christmas Valley | |
| - | KCJJ | Church | Cresco | |
| - | - | Cimarron Municipal | Cimarron | |
| - | KISZ | Cincinnati Blue Ash Airport | Cincinnati | |
| - | - | Cincinnati West Airport | Harrison | |
| - | - | Cindy Guntly Memorial | Franksville | |
| CHP | - | Circle Hot Springs Airport | Circle Hot Springs | |
| - | - | Circle Town Co | Circle | |
| - | - | Cisco Municipal | Cisco | |
| - | - | City And Co | Las Animas | |
| - | - | City Of Coalgate | Coalgate | |
| JID | - | City of Industry Heliport | Los Angeles | |
| - | - | City Of-Swisher Co Municipal | Tulia | |
| - | - | City-Co | Gatesville | |
| CVA | - | Civic Ar Heliport | Pittsburgh | |
| - | - | Clare Co | Harrison | |
| - | - | Clare Municipal | Clare | |
| CNH | KCNH | Claremont Municipal Airport | Claremont | |
| - | - | Claremore Regional | Claremore | |
| - | - | Clarence | Buffalo | |
| - | - | Clarendon Municipal | Clarendon | |
| - | - | Clarendon Municipal | Clarendon | |
| - | KAXQ | Clarion Co | Clarion | |
| - | KCAV | Clarion Municipal | Clarion | |
| - | - | Clarissa Municipal | Clarissa | |
| - | - | Clark Co | Clark | |
| SEP | KSEP | Clark Field | Stephenville | |
| - | - | Clark Memorial | Williams | |