| - La Grande-Union County Airport
FAA / IATA Airport Code: LGD
La Grande, OR
- Baker City Municipal Airport
FAA / IATA Airport Code: BKE
Baker City, OR
- Pendleton, OR
FAA / IATA Airport Code: PDT
Pendleton, OR
- Walla Walla, WA
FAA / IATA Airport Code: ALW
Walla Walla, WA
- Pasco-Richland-Kennewick, WA - Tri-Cities Airport
FAA / IATA Airport Code: PSC
Pasco/Richland/Kennewick, WA
- Richland Airport
FAA / IATA Airport Code: RLD
Richland, WA
- Lewiston, ID - Lewiston-Nez Perce Airport
FAA / IATA Airport Code: LWS
Lewiston, ID
- Ontario Municipal Airport
FAA / IATA Airport Code: ONO
Ontario, OR
- McCall Airport
FAA / IATA Airport Code: MYL
McCall, ID
- Pullman, WA - Pullman
FAA / IATA Airport Code: PUW
Pullman, WA
- Burns Municipal Airport
FAA / IATA Airport Code: BNO
Burns, OR
- Larson AFB - Grant County International Airport
FAA / IATA Airport Code: MWH
Moses Lake, WA
- Yakima, WA - Yakima Air Terminal
FAA / IATA Airport Code: YKM
Yakima, WA
- The Dalles Municipal Airport
FAA / IATA Airport Code: DLS
The Dalles, OR
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