Washington to Seattle
IADSEA
Fly from Washington to Seattle starting at USD 133 with Frontier Airlines.
Best fare available on Nov 16, 2026.
Limited seats. Better plans. Book before it's gone.
Washington to Seattle cheapest flights this week
Washington to Seattle monthly flight fare trend
Aug
from USD 152
Sep
from USD 145
Oct
No flights
Nov
from USD 133
Dec
No flights
Jan
from USD 243
Airport Details
Origin
Washington
Washington Dulles International Airport (IAD)
Dulles, IAD
Zone
New York
Elev
312 ft
Destination
Seattle
Seattle–Tacoma International Airport (SEA)
Seattle, SEA
Zone
Los Angeles
Elev
433 ft
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