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

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 Washington (IAD) to Seattle (SEA)

The cheapest flights to Seattle - Tacoma Intl. found within the past 7 days were CA $357 round trip and CA $179 one way. Prices and availability subject to change. Additional terms may apply.

Wed., Sep. 10 - Wed., Sep. 17
IAD
Washington
SEA
Seattle
CA $357 Roundtrip, found 2 days ago
CA $357
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Wed., Sep. 10 from Washington to Seattle, returning Wed., Sep. 17, priced at CA $357 found 2 days ago
Sat., May 31 - Sat., Jun. 7
IAD
Washington
SEA
Seattle
CA $362 Roundtrip, found 4 days ago
CA $362
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Sat., May 31 from Washington to Seattle, returning Sat., Jun. 7, priced at CA $362 found 4 days ago
Sat., May 31 - Sat., Jun. 7
IAD
Washington
SEA
Seattle
CA $375 Roundtrip, found 4 days ago
CA $375
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Sat., May 31 from Washington to Seattle, returning Sat., Jun. 7, priced at CA $375 found 4 days ago
Wed., Sep. 10 - Wed., Sep. 17
IAD
Washington
SEA
Seattle
CA $385 Roundtrip, found 2 days ago
CA $385
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Wed., Sep. 10 from Washington to Seattle, returning Wed., Sep. 17, priced at CA $385 found 2 days ago
Sat., May 31 - Sat., Jun. 7
IAD
Washington
SEA
Seattle
CA $391 Roundtrip, found 4 days ago
CA $391
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Sat., May 31 from Washington to Seattle, returning Sat., Jun. 7, priced at CA $391 found 4 days ago
Sat., May 31 - Sat., Jun. 7
IAD
Washington
SEA
Seattle
CA $404 Roundtrip, found 4 days ago
CA $404
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Sat., May 31 from Washington to Seattle, returning Sat., Jun. 7, priced at CA $404 found 4 days ago
Sun., Jun. 15 - Thu., Jun. 19
IAD
Washington
SEA
Seattle
CA $414 Roundtrip, found 15 hours ago
CA $414
Roundtrip
found 15 hours ago
Select Alaska Airlines flight, departing Sun., Jun. 15 from Washington to Seattle, returning Thu., Jun. 19, priced at CA $414 found 15 hours ago
Fri., May 30 - Sat., Jun. 7
IAD
Washington
SEA
Seattle
CA $417 Roundtrip, found 5 days ago
CA $417
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Fri., May 30 from Washington to Seattle, returning Sat., Jun. 7, priced at CA $417 found 5 days ago
Fri., May 30 - Thu., Jun. 5
IAD
Washington
SEA
Seattle
CA $418 Roundtrip, found 4 days ago
CA $418
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Fri., May 30 from Washington to Seattle, returning Thu., Jun. 5, priced at CA $418 found 4 days ago
Fri., May 30 - Sat., Jun. 7
IAD
Washington
SEA
Seattle
CA $419 Roundtrip, found 5 days ago
CA $419
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Fri., May 30 from Washington to Seattle, returning Sat., Jun. 7, priced at CA $419 found 5 days ago

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!

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!

*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.