Washington (IAD) to Seattle / Tacoma (SEA) flight deal in economy from $148

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
$224 USD
-34%$148 USD
Verified about 7 hours ago
Fair Availability
22% of dates checked are available within 10% of the lowest price

Thursday, July 16th, 2026

No flight details available for this date.