SEA to IAD from $148 in economy – flightdeals.net

Home Premium Fare Deals About

United Airlines

UAUnited Airlines

One Way•Economy

Seattle–Tacoma International Airport

Seattle / Tacoma, United States

Washington Dulles International Airport

Washington, United States

$274 USD

-46%$148 USD

Verified about 7 hours ago

July 2026

Mon

Tue

Wed

Thu

Fri

Sat

Sun

29 30 1 2 3 4 5$491 6$460 7$528 8$437 9$475 10$460 11$434 12$387 13$382 14$387 15$387 16$437 17$432 18$417 19$466 20$317 21$277 22$277 23$317 24$277 25$363 26$319 27$329 28$243 29$211 30$258 31$267 1$317 2$367

Limited Availability

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

Wednesday, July 1st, 2026

No flight details available for this date.