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

Friday, September 4th, 2026

10 round-trip options

Returning
Wed, Sep 9, 2026•5 Day Trip
$375 USD
Google Flights
Returning
Thu, Sep 10, 2026•6 Day Trip
$375 USD
Google Flights
Returning
Fri, Sep 11, 2026•7 Day Trip
$385 USD
Google Flights
Returning
Sat, Sep 12, 2026•8 Day Trip
$375 USD
Google Flights
Returning
Sun, Sep 13, 2026•9 Day Trip
$455 USD
Google Flights
Returning
Mon, Sep 14, 2026•10 Day Trip
$396 USD
Google Flights
Returning
Tue, Sep 15, 2026•11 Day Trip
$386 USD
Google Flights
Returning
Wed, Sep 16, 2026•12 Day Trip
$386 USD
Google Flights
Returning
Thu, Sep 17, 2026•13 Day Trip
$396 USD
Google Flights
Returning
Fri, Sep 18, 2026•14 Day Trip
$396 USD
Google Flights