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

Thursday, July 2nd, 2026

10 round-trip options

Returning
Tue, Jul 7, 2026•5 Day Trip
$426 USD
Google Flights
Returning
Wed, Jul 8, 2026•6 Day Trip
$345 USD
Google Flights
Returning
Thu, Jul 9, 2026•7 Day Trip
$380 USD
Google Flights
Returning
Fri, Jul 10, 2026•8 Day Trip
$400 USD
Google Flights
Returning
Sat, Jul 11, 2026•9 Day Trip
$526 USD
Google Flights
Returning
Sun, Jul 12, 2026•10 Day Trip
$380 USD
Google Flights
Returning
Mon, Jul 13, 2026•11 Day Trip
$325 USD
Google Flights
Returning
Tue, Jul 14, 2026•12 Day Trip
$325 USD
Google Flights
Returning
Wed, Jul 15, 2026•13 Day Trip
$335 USD
Google Flights
Returning
Thu, Jul 16, 2026•14 Day Trip
$380 USD
Google Flights