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

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

Seattle–Tacoma International Airport

Seattle / Tacoma, United States
United StatesIAD

Washington Dulles International Airport

Washington, United States
$260 USD
-43%$148 USD
Verified 17 days ago
Extremely Rare Availability
3% of dates checked are available within 10% of the lowest price

Monday, June 15th, 2026

No flight details available for this date.