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 13th, 2026

10 round-trip options

Returning
Thu, Jun 18, 2026•5 Day Trip
$632 USD
Google Flights
Returning
Fri, Jun 19, 2026•6 Day Trip
$642 USD
Google Flights
Returning
Sat, Jun 20, 2026•7 Day Trip
$642 USD
Google Flights
Returning
Sun, Jun 21, 2026•8 Day Trip
$977 USD
Google Flights
Returning
Mon, Jun 22, 2026•9 Day Trip
$642 USD
Google Flights
Returning
Tue, Jun 23, 2026•10 Day Trip
$642 USD
Google Flights
Returning
Wed, Jun 24, 2026•11 Day Trip
$493 USD
Google Flights
Returning
Thu, Jun 25, 2026•12 Day Trip
$471 USD
Google Flights
Returning
Fri, Jun 26, 2026•13 Day Trip
$471 USD
Google Flights
Returning
Sat, Jun 27, 2026•14 Day Trip
$546 USD
Google Flights