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
$237 USD
-38%$148 USD
Verified 17 days ago
Fair Availability
21% of dates checked are available within 10% of the lowest price

Thursday, June 4th, 2026

No flight details available for this date.