| | Airport Code | City | State/Region | Country | Airport Name | | CRU | Carriacou Island | | Grenada | |
| CRW | Charleston | WV | USA | Yeager Airport |
| CSG | Columbus | GA | USA | Columbus Metropolitan / Fort Benning |
| CSX | Changsha | | China | |
| CTA | Catania | Sicily | Italy | Fontanarossa |
| CTG | Cartagena | | Colombia | Rafael Nunez |
| CTL | Charleville | Queensland | Australia | Charleville |
| CTS | Sapporo | | Japan | Chitose |
| CTU | Chengdu | | China | |
| CUC | Cucuta | | Colombia | Camilo Daza |
| CUE | Cuenca | | Ecuador | Mariscal La Mar |
| CUL | Culiacan | Sinaloa | Mexico | |
| CUM | Cumana | | Venezuela | |
| CUN | Cancun | | Mexico | |
| CUP | Carupano | | Venezuela | Carupano |
| CUR | Willemstad / Curacao Island | | Netherlands Antilles | Areopuerto Hato |
| CUU | Chihuahua | Chihuahua | Mexico | Genvillalobos |
| CUZ | Cuzco | | Peru | Tte Velazco Astete |
| CVG | Cincinnati | OH | USA | Greater Cincinnati Intl Airport |
| CVN | Clovis | NM | USA | |
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