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An Alaska Airlines plane taking off with a snow-capped mountain in the background.

SAR 1,403 Cheap Flights from Washington (IAD) to Seattle (SEA)

Photo by Port of Seattle
Open Photo by Port of Seattle

Cheap Flights from Washington to Seattle (IAD-SEA)

Prices were available within the past 7 days and start at SAR 1,403 for one-way flights and SAR 2,899 for roundtrip, for the period specified. Prices and availability are subject to change.
United
Wednesday, 22 July, 2026 - Wednesday, 29 July, 2026
IAD
Washington
SEA
Seattle
SAR 2,899
Roundtrip
Found 1 day ago
Select United flight, departing Wednesday, 22 July, 2026 from Washington to Seattle, returning Wednesday, 29 July, 2026, priced at SAR 2,899 Found 1 day ago
Delta
Wednesday, 22 July, 2026 - Wednesday, 29 July, 2026
IAD
Washington
SEA
Seattle
SAR 2,920
Roundtrip
Found 1 day ago
Select Delta flight, departing Wednesday, 22 July, 2026 from Washington to Seattle, returning Wednesday, 29 July, 2026, priced at SAR 2,920 Found 1 day ago
American Airlines
Wednesday, 22 July, 2026 - Wednesday, 29 July, 2026
IAD
Washington
SEA
Seattle
SAR 2,936
Roundtrip
Found 1 day ago
Select American Airlines flight, departing Wednesday, 22 July, 2026 from Washington to Seattle, returning Wednesday, 29 July, 2026, priced at SAR 2,936 Found 1 day ago
American Airlines
Wednesday, 22 July, 2026 - Wednesday, 29 July, 2026
IAD
Washington
SEA
Seattle
SAR 2,973
Roundtrip
Found 1 day ago
Select American Airlines flight, departing Wednesday, 22 July, 2026 from Washington to Seattle, returning Wednesday, 29 July, 2026, priced at SAR 2,973 Found 1 day ago
United
Wednesday, 22 July, 2026 - Wednesday, 29 July, 2026
IAD
Washington
SEA
Seattle
SAR 2,976
Roundtrip
Found 1 day ago
Select United flight, departing Wednesday, 22 July, 2026 from Washington to Seattle, returning Wednesday, 29 July, 2026, priced at SAR 2,976 Found 1 day ago
United
Wednesday, 22 July, 2026 - Wednesday, 29 July, 2026
IAD
Washington
SEA
Seattle
SAR 3,013
Roundtrip
Found 1 day ago
Select United flight, departing Wednesday, 22 July, 2026 from Washington to Seattle, returning Wednesday, 29 July, 2026, priced at SAR 3,013 Found 1 day ago
American Airlines
Wednesday, 22 July, 2026 - Wednesday, 29 July, 2026
IAD
Washington
SEA
Seattle
SAR 3,052
Roundtrip
Found 1 day ago
Select American Airlines flight, departing Wednesday, 22 July, 2026 from Washington to Seattle, returning Wednesday, 29 July, 2026, priced at SAR 3,052 Found 1 day ago
American Airlines
Wednesday, 22 July, 2026 - Wednesday, 29 July, 2026
IAD
Washington
SEA
Seattle
SAR 3,089
Roundtrip
Found 1 day ago
Select American Airlines flight, departing Wednesday, 22 July, 2026 from Washington to Seattle, returning Wednesday, 29 July, 2026, priced at SAR 3,089 Found 1 day ago
Alaska Airlines
Wednesday, 22 July, 2026 - Wednesday, 29 July, 2026
IAD
Washington
SEA
Seattle
SAR 3,101
Roundtrip
Found 1 day ago
Select Alaska Airlines flight, departing Wednesday, 22 July, 2026 from Washington to Seattle, returning Wednesday, 29 July, 2026, priced at SAR 3,101 Found 1 day ago
Alaska Airlines
Wednesday, 22 July, 2026 - Wednesday, 29 July, 2026
IAD
Washington
SEA
Seattle
SAR 3,125
Roundtrip
Found 1 day ago
Select Alaska Airlines flight, departing Wednesday, 22 July, 2026 from Washington to Seattle, returning Wednesday, 29 July, 2026, priced at SAR 3,125 Found 1 day ago

Find the cheapest month to fly from Washington (IAD) to Seattle (SEA)

March is typically the cheapest month to fly

From SAR 597 - SAR 1,544 per traveler.

Travel information

Origin airport
Washington Dulles Intl. Airport
Destination airport
Seattle-Tacoma International Airport
Distance
3,701 km away
Airlines serving
Alaska Airlines, American Airlines, United, Delta, Frontier Airlines, Sun Country Airlines
Popular airline
Alaska Airlines
Roundtrip price
SAR 2,899
Average flight time
6 hours 36 mins
*Available to One Key members.