| Abbreviation | Definition |
|---|---|
| CYRT | Rankin Inlet Airport, Canada |
| CYRW | Trois-Rivieres Airport, Canada |
| CYS | Cheyenne, Wyoming USA |
| CYSA | Sable Island, Canada |
| CYSB | Sudbury Airport, Canada |
| CYSC | Sherbrooke Airport, Canada |
| CYSD | Suffield Airport, Canada |
| CYSF | Stony Rapids Airport, Canada |
| CYSJ | St. John Airport, Canada |
| CYSK | SanikiluaqBelcher Island Airpo, Canada |
| CYSM | Fort Smith Airport, Canada |
| CYSR | Nanisivik Airport, Canada |
| CYSS | Slate Island, Canada |
| CYSU | Summerside Military Airport, Canada |
| CYSY | Sachs Harbour Airport, Canada |
| CYT | Cape Yakataga, Alaska USA |
| CYTC | Erhelda Bat, Canada |
| CYTE | Cape Dorset Airport, Canada |
| CYTH | Thompson Airport, Canada |
| CYTL | Big Trout Lake Airport, Canada |