| Abbreviation | Definition |
|---|---|
| CHI | Chicago, Illinois USA (all area airports) |
| CHJ | Chipinge, Zimbabwe |
| CHK | Chickasha, Oklahoma USA |
| CHL | Challis, Idaho USA |
| CHM | Chimbote, Peru |
| CHN | Chonju, Republic of Korea |
| CHO | Charlottesville, Virginia USA |
| CHP | Circle Hot Springs, Alaska USA |
| CHQ | Chania, Greece |
| CHS | Charleston, South Carolina USA |
| CHT | Chatham Island, New Zealand |
| CHU | Chuathbaluk, Alaska USA |
| CHV | Chaves, Portugal |
| CHW | Jiuquan, Mainland China |
| CHX | Changuinola, Panama |
| CHY | Choiseul Bay, Solomon Islands |
| CHZ | Chiloquin, Oregon USA |
| CI | Chadwick International |
| CIA | Ciampino, Italy |
| CIC | Chico Municipal Airport, Chico, California USA |