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

Tuesday, June 9th, 2026

10 round-trip options

Returning
Sun, Jun 14, 2026•5 Day Trip
$957 USD
Google Flights
Returning
Mon, Jun 15, 2026•6 Day Trip
$957 USD
Google Flights
Returning
Tue, Jun 16, 2026•7 Day Trip
$957 USD
Google Flights
Returning
Wed, Jun 17, 2026•8 Day Trip
$997 USD
Google Flights
Returning
Thu, Jun 18, 2026•9 Day Trip
$1,222 USD
Google Flights
Returning
Fri, Jun 19, 2026•10 Day Trip
$933 USD
Google Flights
Returning
Sat, Jun 20, 2026•11 Day Trip
$892 USD
Google Flights
Returning
Sun, Jun 21, 2026•12 Day Trip
$892 USD
Google Flights
Returning
Mon, Jun 22, 2026•13 Day Trip
$858 USD
Google Flights
Returning
Tue, Jun 23, 2026•14 Day Trip
$892 USD
Google Flights