SEA - Seattle-Tacoma International Airport, Seattle (WA)
BFI - King County Airport (Boeing Field), Seattle (WA)
LKE - Lake Union Seaplane Base, Seattle (WA)
GEG - Spokane International Airport, Spokane (WA)
BLI - Bellingham International Airport, Bellingham (WA)
PSC - Tri-Cities Airport, Pasco (WA)
YKM - Yakima Air Terminal (McAllister), Yakima (WA)
PUW - Pullman-Moscow Regional Airport, Pullman (WA)
ALW - Walla Walla Regional Airport, Walla Walla (WA)
EAT - Pangborn Memorial Airport, Wenatchee (WA)
CLM - William R. Fairchild International Airport, Port Angeles (WA)
MKE - General Mitchell International Airport, Milwaukee (WI)
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See also: Washington DC