Seattle / Tacoma (SEA) to Washington (IAD) flight deal in economy from $255
SEASeattle–Tacoma International Airport
Seattle / Tacoma, United States
IADWashington Dulles International Airport
Washington, United States
$450 USD
-43%$255 USD
Verified 13 days agoJuly 2026
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Rare Availability
9% of dates checked are available within 10% of the lowest price
Wednesday, July 29th, 2026
8 round-trip options
Returning
Mon, Aug 3, 2026•5 Day Trip
$413 USD
Returning
Tue, Aug 4, 2026•6 Day Trip
$406 USD
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Wed, Aug 5, 2026•7 Day Trip
$443 USD
Returning
Thu, Aug 6, 2026•8 Day Trip
$499 USD
Returning
Fri, Aug 7, 2026•9 Day Trip
$473 USD
Returning
Sun, Aug 9, 2026•11 Day Trip
$413 USD
Returning
Mon, Aug 10, 2026•12 Day Trip
$356 USD
Returning
Tue, Aug 11, 2026•13 Day Trip
$343 USD