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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 3,179 for roundtrip, for the period specified. Prices and availability are subject to change.
American Airlines
Saturday, 18 July, 2026 - Saturday, 25 July, 2026
IAD
Washington
SEA
Seattle
SAR 3,179
Roundtrip
Found 2 days ago
Select American Airlines flight, departing Saturday, 18 July, 2026 from Washington to Seattle, returning Saturday, 25 July, 2026, priced at SAR 3,179 Found 2 days ago
United
Saturday, 18 July, 2026 - Saturday, 25 July, 2026
IAD
Washington
SEA
Seattle
SAR 3,182
Roundtrip
Found 2 days ago
Select United flight, departing Saturday, 18 July, 2026 from Washington to Seattle, returning Saturday, 25 July, 2026, priced at SAR 3,182 Found 2 days ago
Delta
Saturday, 18 July, 2026 - Saturday, 25 July, 2026
IAD
Washington
SEA
Seattle
SAR 3,259
Roundtrip
Found 2 days ago
Select Delta flight, departing Saturday, 18 July, 2026 from Washington to Seattle, returning Saturday, 25 July, 2026, priced at SAR 3,259 Found 2 days ago
American Airlines
Saturday, 18 July, 2026 - Saturday, 25 July, 2026
IAD
Washington
SEA
Seattle
SAR 3,294
Roundtrip
Found 2 days ago
Select American Airlines flight, departing Saturday, 18 July, 2026 from Washington to Seattle, returning Saturday, 25 July, 2026, priced at SAR 3,294 Found 2 days ago
American Airlines
Saturday, 18 July, 2026 - Saturday, 25 July, 2026
IAD
Washington
SEA
Seattle
SAR 3,296
Roundtrip
Found 2 days ago
Select American Airlines flight, departing Saturday, 18 July, 2026 from Washington to Seattle, returning Saturday, 25 July, 2026, priced at SAR 3,296 Found 2 days ago
American Airlines
Saturday, 18 July, 2026 - Saturday, 25 July, 2026
IAD
Washington
SEA
Seattle
SAR 3,331
Roundtrip
Found 2 days ago
Select American Airlines flight, departing Saturday, 18 July, 2026 from Washington to Seattle, returning Saturday, 25 July, 2026, priced at SAR 3,331 Found 2 days ago
Alaska Airlines
Saturday, 18 July, 2026 - Saturday, 25 July, 2026
IAD
Washington
SEA
Seattle
SAR 3,342
Roundtrip
Found 2 days ago
Select Alaska Airlines flight, departing Saturday, 18 July, 2026 from Washington to Seattle, returning Saturday, 25 July, 2026, priced at SAR 3,342 Found 2 days ago
American Airlines
Saturday, 18 July, 2026 - Saturday, 25 July, 2026
IAD
Washington
SEA
Seattle
SAR 3,444
Roundtrip
Found 2 days ago
Select American Airlines flight, departing Saturday, 18 July, 2026 from Washington to Seattle, returning Saturday, 25 July, 2026, priced at SAR 3,444 Found 2 days ago
American Airlines
Saturday, 18 July, 2026 - Saturday, 25 July, 2026
IAD
Washington
SEA
Seattle
SAR 3,482
Roundtrip
Found 2 days ago
Select American Airlines flight, departing Saturday, 18 July, 2026 from Washington to Seattle, returning Saturday, 25 July, 2026, priced at SAR 3,482 Found 2 days ago
United
Saturday, 18 July, 2026 - Saturday, 25 July, 2026
IAD
Washington
SEA
Seattle
SAR 3,558
Roundtrip
Found 2 days ago
Select United flight, departing Saturday, 18 July, 2026 from Washington to Seattle, returning Saturday, 25 July, 2026, priced at SAR 3,558 Found 2 days 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, United, American Airlines, Delta, Frontier Airlines, Sun Country Airlines
Popular airline
Alaska Airlines
Roundtrip price
SAR 3,179
Average flight time
6 hours 39 mins
*Available to One Key members.