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

￥22,260 Cheap Flights from Washington (IAD) to Seattle (SEA)

Flight 1

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 ￥22,260 for one-way flights and ￥41,340 for roundtrip, for the period specified. Prices and availability are subject to change.
Delta
Sat, Sep 12 - Fri, Sep 25
IAD
Washington
SEA
Seattle
￥41,340
Roundtrip
Found 6 days ago
Select Delta flight, departing Sat, Sep 12 from Washington to Seattle, returning Fri, Sep 25, priced at ￥41,340 Found 6 days ago
Delta
Wed, Aug 26 - Tue, Sep 15
IAD
Washington
SEA
Seattle
￥41,450
Roundtrip
Found 12 hours ago
Select Delta flight, departing Wed, Aug 26 from Washington to Seattle, returning Tue, Sep 15, priced at ￥41,450 Found 12 hours ago
American Airlines
Wed, Aug 26 - Wed, Sep 2
IAD
Washington
SEA
Seattle
￥44,710
Roundtrip
Found 3 days ago
Select American Airlines flight, departing Wed, Aug 26 from Washington to Seattle, returning Wed, Sep 2, priced at ￥44,710 Found 3 days ago
Alaska Airlines
Mon, Aug 17 - Wed, Aug 26
IAD
Washington
SEA
Seattle
￥46,430
Roundtrip
Found 2 days ago
Select Alaska Airlines flight, departing Mon, Aug 17 from Washington to Seattle, returning Wed, Aug 26, priced at ￥46,430 Found 2 days ago
Alaska Airlines
Sun, Sep 13 - Fri, Sep 25
IAD
Washington
SEA
Seattle
￥47,790
Roundtrip
Found 6 days ago
Select Alaska Airlines flight, departing Sun, Sep 13 from Washington to Seattle, returning Fri, Sep 25, priced at ￥47,790 Found 6 days ago
American Airlines
Tue, Aug 18 - Wed, Aug 26
IAD
Washington
SEA
Seattle
￥47,850
Roundtrip
Found 2 hours ago
Select American Airlines flight, departing Tue, Aug 18 from Washington to Seattle, returning Wed, Aug 26, priced at ￥47,850 Found 2 hours ago
Alaska Airlines
Tue, Aug 18 - Wed, Aug 26
IAD
Washington
SEA
Seattle
￥47,900
Roundtrip
Found 2 hours ago
Select Alaska Airlines flight, departing Tue, Aug 18 from Washington to Seattle, returning Wed, Aug 26, priced at ￥47,900 Found 2 hours ago
American Airlines
Thu, Aug 27 - Sun, Aug 30
IAD
Washington
SEA
Seattle
￥47,930
Roundtrip
Found 3 days ago
Select American Airlines flight, departing Thu, Aug 27 from Washington to Seattle, returning Sun, Aug 30, priced at ￥47,930 Found 3 days ago
Alaska Airlines
Mon, Aug 17 - Wed, Aug 26
IAD
Washington
SEA
Seattle
￥47,940
Roundtrip
Found 2 days ago
Select Alaska Airlines flight, departing Mon, Aug 17 from Washington to Seattle, returning Wed, Aug 26, priced at ￥47,940 Found 2 days ago
United
Fri, Aug 28 - Sun, Aug 30
IAD
Washington
SEA
Seattle
￥59,290
Roundtrip
Found 2 hours ago
Select United flight, departing Fri, Aug 28 from Washington to Seattle, returning Sun, Aug 30, priced at ￥59,290 Found 2 hours ago

Alternative airports near Seattle

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Seattle - Tacoma Intl. SEA. Cheapest option available. Average driving time to city center is 20 minutes. Flights from ￥70,770
SEA
Seattle - Tacoma Intl.
Cheapest
Average driving time to city center20 min
Flights from ￥70,770

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

March is typically the cheapest month to fly

From ￥25,648 - ￥66,356 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
￥41,340
Average flight time
6 hours 36 mins
*Available to One Key members.