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
Thursday, July 9th, 2026
8 round-trip options
Returning
Tue, Jul 14, 2026•5 Day Trip
$751 USD
Returning
Wed, Jul 15, 2026•6 Day Trip
$850 USD
Returning
Thu, Jul 16, 2026•7 Day Trip
$869 USD
Returning
Fri, Jul 17, 2026•8 Day Trip
$850 USD
Returning
Sat, Jul 18, 2026•9 Day Trip
$725 USD
Returning
Mon, Jul 20, 2026•11 Day Trip
$691 USD
Returning
Tue, Jul 21, 2026•12 Day Trip
$691 USD
Returning
Wed, Jul 22, 2026•13 Day Trip
$773 USD