Seattle / Tacoma (SEA) to Washington (IAD) flight deal in economy from $255

Alaska Airlines, Inc.ASAlaska Airlines, Inc.
Round Trip•Economy
United StatesSEA

Seattle–Tacoma International Airport

Seattle / Tacoma, United States
United StatesIAD

Washington Dulles International Airport

Washington, United States
$458 USD
-44%$255 USD
Verified about 1 hour ago
Extremely Rare Availability
4% of dates checked are available within 10% of the lowest price

Saturday, August 15th, 2026

9 round-trip options

Returning
Thu, Aug 20, 2026•5 Day Trip
$400 USD
Google Flights
Returning
Fri, Aug 21, 2026•6 Day Trip
$400 USD
Google Flights
Returning
Sat, Aug 22, 2026•7 Day Trip
$400 USD
Google Flights
Returning
Sun, Aug 23, 2026•8 Day Trip
$360 USD
Google Flights
Returning
Mon, Aug 24, 2026•9 Day Trip
$360 USD
Google Flights
Returning
Tue, Aug 25, 2026•10 Day Trip
$360 USD
Google Flights
Returning
Thu, Aug 27, 2026•12 Day Trip
$445 USD
Google Flights
Returning
Fri, Aug 28, 2026•13 Day Trip
$445 USD
Google Flights
Returning
Sat, Aug 29, 2026•14 Day Trip
$360 USD
Google Flights