Seattle / Tacoma (SEA) to Washington (IAD) flight deal in economy from $247

Delta Air LinesDLDelta Air Lines
Round Trip•Economy
United StatesSEA

Seattle–Tacoma International Airport

Seattle / Tacoma, United States
United StatesIAD

Washington Dulles International Airport

Washington, United States
$555 USD
-55%$247 USD
Verified 2 days ago
Extremely Rare Availability
2% of dates checked are available within 10% of the lowest price

Monday, July 27th, 2026

0 round-trip options

No flight details available for this date.