| Abbreviation | Definition |
|---|---|
| COK | Cochin, India |
| COO | Cotonou, Benin |
| COQ | Choibalsan, Mongolia |
| COR | Cordoba, CD, Argentina |
| COS | City of Colorado Springs Municipal Airport, Colorado Springs, Colorado USA |
| COU | Columbia, Missouri USA |
| COX | Congo Town, Andros Island, Bahamas |
| COZ | Constanza, Dominican Republic |
| CPB | Capurgana, Colombia |
| CPC | San Martin de Los An, NE, Argentina |
| CPD | Coober Pedy, South Australia, Australia |
| CPE | Campeche, Mexico |
| CPF | Cepu, Indonesia |
| CPG | Carmen De Patagones, Buenos Aires, Argentina |
| CPH | Copenhagen, Denmark |
| CPI | Cape Orford, Papua New Guinea |
| CPN | Cape Rodney, Papua New Guinea |
| CPO | Copiapo, Chile |
| CPQ | Campinas, Sao Paulo, Brazil |
| CPR | Natrona County International Airport, Casper, Wyoming USA |