| Abbreviation | Definition |
|---|---|
| CID | Cedar Rapids/ Iowa City, Iowa USA |
| CIF | Chifeng, Mainland China |
| CIG | Craig, Colorado USA |
| CIJ | Cobija, Bolivia |
| CIK | Chalkyitsik, Alaska USA |
| CIL | Council, Alaska USA |
| CIM | Cimitarra, Colombia |
| CIP | Chipata, Zambia |
| CIQ | Chiquimula, Guatemala |
| CIT | Shimkent, Kazakstan |
| CIU | Chippewa County International Airport, Sault Ste Marie, Michigan USA |
| CIV | Chomley Airport, Chomley, Alaska USA |
| CIW | Canouan Island, Windward Islands |
| CIX | Chiclayo, Peru |
| CIY | Comiso, Italy |
| CIZ | Coari, Amazonas, Brazil |
| CJA | Cajamarca, Peru |
| CJB | Coimbatore, India |
| CJC | Calama, Chile |
| CJJ | Cheong Ju City, Republic of Korea |