Seattle / Tacoma (SEA) to Washington (IAD) flight deal from $120 USD in economy class – flightdeals.net

Home Premium Fare Deals About Pricing

Alaska Airlines, Inc.

ASAlaska Airlines, Inc.

One Way•Economy

Seattle–Tacoma International Airport

Seattle / Tacoma, United States

Washington Dulles International Airport

Washington, United States

$207 USD

-42%$120 USD

Verified Nov 12, 2025 at 7:11 AM

December 2025

Mon

Tue

Wed

Thu

Fri

Sat

Sun

1$379 2$254 3$159 4$159 5$120 6$120 7$120 8$120 9$120 10$120 11$134 12$120 13$120 14$134 15$120 16$120 17$159 18$254 19$314 20$314 21$359 22$314 23$379 24$159 25$159 26$159 27$254 28$204 29$204 30$204 31$204 1 2 3 4

Limited Availability

16% of dates checked are available within 10% of the lowest price

Sunday, December 21st, 2025

Outbound Flights

·

→

·

→

·

→