| KALW | ALW | Walla Walla Regional Airport | Walla Walla | 1989 |
| KBFI | BFI | Boeing Field King County International Airport | Seattle | 3048 |
| KBLI | BLI | Bellingham International Airport | Bellingham | 2042 |
| KCLM | CLM | William R Fairchild International Airport | Port Angeles | 1935 |
| KGEG | GEG | Spokane International Airport | Spokane | 2743 |
| KOLM | OLM | Olympia Regional Airport | Olympia | 1267 |
| KPAE | PAE | Snohomish County (Paine Field) Airport | Everett | 1376 |
| KPWT | PWT | Bremerton National Airport | Bremerton | 1829 |
| KSEA | SEA | Seattle Tacoma International Airport | Seattle | 3627 |
| KYKM | YKM | Yakima Air Terminal McAllister Field | Yakima | 1169 |
| KMWH | MWH | Grant Country International Airport | Moses Lake | 4116 |
| KPSC | PSC | Tri Cities Airport | Pasco | 2350 |
| KPUW | PUW | Pullman Moscow Regional Airport | Pullman | 2051 |
| - | LPS | Lopez Island Airport | Lopez Island | 885 |
