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

Thursday, June 25th, 2026

10 round-trip options

Returning
Tue, Jun 30, 2026•5 Day Trip
$340 USD
Google Flights
Returning
Wed, Jul 1, 2026•6 Day Trip
$386 USD
Google Flights
Returning
Thu, Jul 2, 2026•7 Day Trip
$446 USD
Google Flights
Returning
Fri, Jul 3, 2026•8 Day Trip
$386 USD
Google Flights
Returning
Sat, Jul 4, 2026•9 Day Trip
$255 USD
Google Flights
Returning
Sun, Jul 5, 2026•10 Day Trip
$386 USD
Google Flights
Returning
Mon, Jul 6, 2026•11 Day Trip
$336 USD
Google Flights
Returning
Tue, Jul 7, 2026•12 Day Trip
$386 USD
Google Flights
Returning
Wed, Jul 8, 2026•13 Day Trip
$331 USD
Google Flights
Returning
Thu, Jul 9, 2026•14 Day Trip
$340 USD
Google Flights