Washington (IAD) to Seattle / Tacoma (SEA) flight deal in economy from $219

United AirlinesUAUnited Airlines
One Way•Economy
United StatesIAD

Washington Dulles International Airport

Washington, United States
United StatesSEA

Seattle–Tacoma International Airport

Seattle / Tacoma, United States
$273 USD
-20%$219 USD
Verified about 4 hours ago
Good Availability
42% of dates checked are available within 10% of the lowest price

Thursday, September 24th, 2026

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