| Abbreviation | Definition |
|---|---|
| CUI | Carrillo, Colombia |
| CUJ | Culion, Philippines |
| CUK | Caye Caulker, Belize |
| CUL | Culiacan, Mexico |
| CUM | Cumana, Venezuela |
| CUN | Cancun, Mexico |
| CUO | Caruru, Colombia |
| CUQ | Coen, Queensland, Australia |
| CUQC | Stirling, Alberta, Canada (former code) |
| CUR | Aeropuerto Hato, Curacao, Netherlands Antilles |
| CUS | Columbus, New Mexico USA |
| CUU | Chihuahua, Mexico |
| CUUP | Uplands Canadian Forces Air Base, Ottawa, Ontario, Canada |
| CUV | Casigua, Venezuela |
| CUW | Cube Cove, Alaska USA |
| CUY | Cue, Western Australia, Australia |
| CUZ | Cuzco, Peru |
| CVC | Cleve, South Australia, Australia |
| CVE | Covenas, Colombia |
| CVF | Courchevel, France |