Cheap Flights From Seattle - Tacoma Intl. (SEA) To Washington Dulles Intl. (IAD)

Wander Wisely with exceptional service, 24/7 supportOpens in a new window

Feel at ease with free flight cancellations within 24 hours of booking

Change your flight without a fee on select flights

Find The Best Dates To Fly

Cheapest Flights from Seattle (SEA) to Washington (IAD)

The cheapest flights to Washington Dulles Intl. found within the past 7 days were CA $362 round trip and CA $179 one way. Prices and availability subject to change. Additional terms may apply.

Sat., May 31 - Sat., Jun. 7
SEA
Seattle
IAD
Washington
CA $362 Roundtrip, found 2 days ago
CA $362
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Sat., May 31 from Seattle to Washington, returning Sat., Jun. 7, priced at CA $362 found 2 days ago
Tue., Nov. 11 - Wed., Nov. 12
SEA
Seattle
IAD
Washington
CA $382 Roundtrip, found 5 days ago
CA $382
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Tue., Nov. 11 from Seattle to Washington, returning Wed., Nov. 12, priced at CA $382 found 5 days ago
Tue., Jun. 3 - Sun., Jun. 8
SEA
Seattle
IAD
Washington
CA $382 Roundtrip, found 2 days ago
CA $382
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Tue., Jun. 3 from Seattle to Washington, returning Sun., Jun. 8, priced at CA $382 found 2 days ago
Sat., May 31 - Sat., Jun. 7
SEA
Seattle
IAD
Washington
CA $389 Roundtrip, found 5 days ago
CA $389
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Sat., May 31 from Seattle to Washington, returning Sat., Jun. 7, priced at CA $389 found 5 days ago
Tue., Jun. 3 - Sun., Jun. 8
SEA
Seattle
IAD
Washington
CA $391 Roundtrip, found 2 days ago
CA $391
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Tue., Jun. 3 from Seattle to Washington, returning Sun., Jun. 8, priced at CA $391 found 2 days ago
Tue., Nov. 11 - Thu., Nov. 13
SEA
Seattle
IAD
Washington
CA $396 Roundtrip, found 5 days ago
CA $396
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Tue., Nov. 11 from Seattle to Washington, returning Thu., Nov. 13, priced at CA $396 found 5 days ago
Sat., May 31 - Sat., Jun. 7
SEA
Seattle
IAD
Washington
CA $404 Roundtrip, found 3 days ago
CA $404
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Sat., May 31 from Seattle to Washington, returning Sat., Jun. 7, priced at CA $404 found 3 days ago
Tue., Nov. 11 - Wed., Nov. 12
SEA
Seattle
IAD
Washington
CA $409 Roundtrip, found 5 days ago
CA $409
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Tue., Nov. 11 from Seattle to Washington, returning Wed., Nov. 12, priced at CA $409 found 5 days ago
Fri., Sep. 5 - Sun., Sep. 7
SEA
Seattle
IAD
Washington
CA $410 Roundtrip, found 3 days ago
CA $410
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Fri., Sep. 5 from Seattle to Washington, returning Sun., Sep. 7, priced at CA $410 found 3 days ago
Sat., May 31 - Sat., Jun. 7
SEA
Seattle
IAD
Washington
CA $418 Roundtrip, found 5 days ago
CA $418
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Sat., May 31 from Seattle to Washington, returning Sat., Jun. 7, priced at CA $418 found 5 days ago

Popular Flight Routes from Seattle (SEA)

Travelers at SEA love to visit these top cities. Roam to the top destinations from Seattle (SEA) today with the cheap prices from Travelocity!

Popular Flight Routes from Washington (IAD)

Travelers at IAD love to visit these top cities. Roam to the top destinations from Washington(IAD) today with the cheap prices from Travelocity!

*Price based on the lowest price found within past 24 hours and based upon one night stay for two adults over the next thirty days. Prices and availability subject to change. Additional terms may apply.