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

Alaska Airlines, Inc.ASAlaska Airlines, Inc.
One Way•Economy
United StatesIAD

Washington Dulles International Airport

Washington, United States
United StatesSEA

Seattle–Tacoma International Airport

Seattle / Tacoma, United States
$258 USD
-43%$148 USD
Verified 2 days ago
Fair Availability
20% of dates checked are available within 10% of the lowest price

Sunday, October 11th, 2026

No flight details available for this date.