SEA to IAD from $255 in economy – flightdeals.net

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United Airlines

UAUnited Airlines

Round Trip•Economy

Seattle–Tacoma International Airport

Seattle / Tacoma, United States

Washington Dulles International Airport

Washington, United States

$450 USD

-43%$255 USD

Verified 13 days ago

July 2026

Mon

Tue

Wed

Thu

Fri

Sat

Sun

29 30 1 2 3 4 5$682 6$674 7$893 8$691 9$691 10$684 11$610 12$648 13$586 14$555 15$555 16$628 17$684 18$628 19$663 20$499 21$463 22$463 23$500 24$480 25$570 26$511 27$495 28$400 29$343 30$375 31$385 1$434 2$491

Rare Availability

9% of dates checked are available within 10% of the lowest price

Wednesday, July 1st, 2026

0 round-trip options

No flight details available for this date.