Washington (IAD) to Seattle / Tacoma (SEA) flight deal in economy from $255

United AirlinesUAUnited Airlines
Round Trip•Economy
United StatesIAD

Washington Dulles International Airport

Washington, United States
United StatesSEA

Seattle–Tacoma International Airport

Seattle / Tacoma, United States
$450 USD
-43%$255 USD
Verified about 8 hours ago
Limited Availability
11% of dates checked are available within 10% of the lowest price

Saturday, June 27th, 2026

10 round-trip options

Returning
Thu, Jul 2, 2026•5 Day Trip
$547 USD
Google Flights
Returning
Fri, Jul 3, 2026•6 Day Trip
$585 USD
Google Flights
Returning
Sat, Jul 4, 2026•7 Day Trip
$554 USD
Google Flights
Returning
Sun, Jul 5, 2026•8 Day Trip
$752 USD
Google Flights
Returning
Mon, Jul 6, 2026•9 Day Trip
$666 USD
Google Flights
Returning
Tue, Jul 7, 2026•10 Day Trip
$536 USD
Google Flights
Returning
Wed, Jul 8, 2026•11 Day Trip
$499 USD
Google Flights
Returning
Thu, Jul 9, 2026•12 Day Trip
$509 USD
Google Flights
Returning
Fri, Jul 10, 2026•13 Day Trip
$568 USD
Google Flights
Returning
Sat, Jul 11, 2026•14 Day Trip
$576 USD
Google Flights