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

Tuesday, November 17th, 2026

10 round-trip options

Returning
Sun, Nov 22, 2026•5 Day Trip
$405 USD
Google Flights
Returning
Mon, Nov 23, 2026•6 Day Trip
$402 USD
Google Flights
Returning
Tue, Nov 24, 2026•7 Day Trip
$402 USD
Google Flights
Returning
Wed, Nov 25, 2026•8 Day Trip
$402 USD
Google Flights
Returning
Thu, Nov 26, 2026•9 Day Trip
$402 USD
Google Flights
Returning
Fri, Nov 27, 2026•10 Day Trip
$395 USD
Google Flights
Returning
Sat, Nov 28, 2026•11 Day Trip
$530 USD
Google Flights
Returning
Sun, Nov 29, 2026•12 Day Trip
$931 USD
Google Flights
Returning
Mon, Nov 30, 2026•13 Day Trip
$551 USD
Google Flights
Returning
Tue, Dec 1, 2026•14 Day Trip
$402 USD
Google Flights