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

Sunday, June 14th, 2026

10 round-trip options

Returning
Fri, Jun 19, 2026•5 Day Trip
$833 USD
Google Flights
Returning
Sat, Jun 20, 2026•6 Day Trip
$772 USD
Google Flights
Returning
Sun, Jun 21, 2026•7 Day Trip
$772 USD
Google Flights
Returning
Mon, Jun 22, 2026•8 Day Trip
$758 USD
Google Flights
Returning
Tue, Jun 23, 2026•9 Day Trip
$772 USD
Google Flights
Returning
Wed, Jun 24, 2026•10 Day Trip
$732 USD
Google Flights
Returning
Thu, Jun 25, 2026•11 Day Trip
$718 USD
Google Flights
Returning
Fri, Jun 26, 2026•12 Day Trip
$1,102 USD
Google Flights
Returning
Sat, Jun 27, 2026•13 Day Trip
$792 USD
Google Flights
Returning
Sun, Jun 28, 2026•14 Day Trip
$792 USD
Google Flights