Seattle / Tacoma (SEA) to Washington (IAD) flight deal in economy from $209
SEASeattle–Tacoma International Airport
Seattle / Tacoma, United States
IADWashington Dulles International Airport
Washington, United States
$266 USD
-21%$209 USD
Verified 27 days agoOctober 2026
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Good Availability
40% of dates checked are available within 10% of the lowest price
Monday, October 19th, 2026
Outbound Flights
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