| Airport Code | City | State/Region | Country | Airport Name |
| CMX | Hancock | MI | USA | Houghton County / Memorial |
| CND | Constanta | | Romania | Kogalniceanu |
| CNF | Belo Horizonte /Belo Horizon | Minas Gerais | Brazil | Aeropuerto Internacional Tancredo Neves |
| CNM | Carlsbad | NM | USA | |
| CNS | Cairns | Queensland | Australia | Cairns |
| CNX | Chiang Mai | | Thailand | International |
| CNY | Moab | UT | USA | |
| COK | Cochin | | India | Naval Air Station |
| COO | Cotonou | | Benin | Cotonou |
| COR | Cordoba | Cordoba | Argentina | Pajas Blancas |
| COS | Colorado Springs | CO | USA | Colorado Springs Municipal |
| COU | Columbia | MO | USA | Columbia Regional |
| CPC | San Martin De Los Andes | | Neuquen | Argentina |
| CPH | Copenhagen | | Denmark | Copenhagen |
| CPQ | Campinas | Sao Paulo | Brazil | Campinas International |
| CPR | Casper | WY | USA | Natrona County Intl Airport |
| CPT | Cape Town | | South Africa | D F Malan |
| CRD | Comodoro Rivadavia | Chubut | Argentina | Comodora Rivadavia |
| CRI | Crooked Island | | Bahamas | |
| CRP | Corpus Christi | TX | USA | Corpus Christi International Airport |