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
$449 USD
-43%$255 USD
Verified 16 days ago
Limited Availability
11% of dates checked are available within 10% of the lowest price

Sunday, November 22nd, 2026

7 round-trip options

Returning
Sat, Nov 28, 2026•6 Day Trip
$744 USD
Google Flights
Returning
Sun, Nov 29, 2026•7 Day Trip
$850 USD
Google Flights
Returning
Mon, Nov 30, 2026•8 Day Trip
$549 USD
Google Flights
Returning
Wed, Dec 2, 2026•10 Day Trip
$447 USD
Google Flights
Returning
Thu, Dec 3, 2026•11 Day Trip
$447 USD
Google Flights
Returning
Sat, Dec 5, 2026•13 Day Trip
$447 USD
Google Flights
Returning
Sun, Dec 6, 2026•14 Day Trip
$483 USD
Google Flights