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 6 hours ago
Extremely Rare Availability
4% of dates checked are available within 10% of the lowest price

Friday, November 20th, 2026

9 round-trip options

Returning
Wed, Nov 25, 2026•5 Day Trip
$497 USD
Google Flights
Returning
Thu, Nov 26, 2026•6 Day Trip
$497 USD
Google Flights
Returning
Fri, Nov 27, 2026•7 Day Trip
$547 USD
Google Flights
Returning
Sat, Nov 28, 2026•8 Day Trip
$842 USD
Google Flights
Returning
Sun, Nov 29, 2026•9 Day Trip
$922 USD
Google Flights
Returning
Mon, Nov 30, 2026•10 Day Trip
$785 USD
Google Flights
Returning
Tue, Dec 1, 2026•11 Day Trip
$647 USD
Google Flights
Returning
Thu, Dec 3, 2026•13 Day Trip
$497 USD
Google Flights
Returning
Fri, Dec 4, 2026•14 Day Trip
$497 USD
Google Flights