Seattle / Tacoma (SEA) to Washington (IAD) flight deal in economy from $247
SEASeattle–Tacoma International Airport
Seattle / Tacoma, United States
IADWashington Dulles International Airport
Washington, United States
$555 USD
-55%$247 USD
Verified 2 days agoDecember 2026
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Extremely Rare Availability
2% of dates checked are available within 10% of the lowest price
Wednesday, December 23rd, 2026
10 round-trip options
Returning
Mon, Dec 28, 2026•5 Day Trip
$627 USD
Returning
Tue, Dec 29, 2026•6 Day Trip
$702 USD
Returning
Wed, Dec 30, 2026•7 Day Trip
$712 USD
Returning
Thu, Dec 31, 2026•8 Day Trip
$1,007 USD
Returning
Fri, Jan 1, 2027•9 Day Trip
$917 USD
Returning
Sat, Jan 2, 2027•10 Day Trip
$557 USD
Returning
Sun, Jan 3, 2027•11 Day Trip
$617 USD
Returning
Mon, Jan 4, 2027•12 Day Trip
$557 USD
Returning
Tue, Jan 5, 2027•13 Day Trip
$537 USD
Returning
Wed, Jan 6, 2027•14 Day Trip
$537 USD