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

United AirlinesUAUnited Airlines
One Way•Economy
United StatesSEA

Seattle–Tacoma International Airport

Seattle / Tacoma, United States
United StatesIAD

Washington Dulles International Airport

Washington, United States
$266 USD
-18%$219 USD
Verified about 5 hours ago
Good Availability
46% of dates checked are available within 10% of the lowest price

Saturday, August 15th, 2026

No flight details available for this date.