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 9 hours ago
Limited Availability
11% of dates checked are available within 10% of the lowest price

Wednesday, July 8th, 2026

10 round-trip options

Returning
Mon, Jul 13, 2026•5 Day Trip
$461 USD
Google Flights
Returning
Tue, Jul 14, 2026•6 Day Trip
$386 USD
Google Flights
Returning
Wed, Jul 15, 2026•7 Day Trip
$376 USD
Google Flights
Returning
Thu, Jul 16, 2026•8 Day Trip
$445 USD
Google Flights
Returning
Fri, Jul 17, 2026•9 Day Trip
$471 USD
Google Flights
Returning
Sat, Jul 18, 2026•10 Day Trip
$516 USD
Google Flights
Returning
Sun, Jul 19, 2026•11 Day Trip
$494 USD
Google Flights
Returning
Mon, Jul 20, 2026•12 Day Trip
$386 USD
Google Flights
Returning
Tue, Jul 21, 2026•13 Day Trip
$443 USD
Google Flights
Returning
Wed, Jul 22, 2026•14 Day Trip
$376 USD
Google Flights