Flights to Northwest Washington from Washington - ￥15,190

View ￥15,190 flight on Thu, Oct 30, 2025Opens in a new window

Popular airlines from Washington to Northwest Washington

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Cheap Flights from Washington to Northwest Washington (WAS-SEA)

Prices were available within the past 7 days and start at ￥15,190 for one-way flights and ￥28,820 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Sat, Sep 27 - Thu, Oct 2
IAD
Washington
SEA
Seattle
￥28,820 Roundtrip, found 6 days ago
￥28,820
Roundtrip
found 6 days ago
Select American Airlines flight, departing Sat, Sep 27 from Washington to Seattle, returning Thu, Oct 2, priced at ￥28,820 found 6 days ago
American Airlines
Sat, Sep 27 - Thu, Oct 2
IAD
Washington
SEA
Seattle
￥30,330 Roundtrip, found 6 days ago
￥30,330
Roundtrip
found 6 days ago
Select American Airlines flight, departing Sat, Sep 27 from Washington to Seattle, returning Thu, Oct 2, priced at ￥30,330 found 6 days ago
American Airlines
Sat, Sep 27 - Thu, Oct 2
IAD
Washington
SEA
Seattle
￥32,590 Roundtrip, found 6 days ago
￥32,590
Roundtrip
found 6 days ago
Select American Airlines flight, departing Sat, Sep 27 from Washington to Seattle, returning Thu, Oct 2, priced at ￥32,590 found 6 days ago
Delta
Sat, Sep 27 - Thu, Oct 2
IAD
Washington
SEA
Seattle
￥40,160 Roundtrip, found 6 days ago
￥40,160
Roundtrip
found 6 days ago
Select Delta flight, departing Sat, Sep 27 from Washington to Seattle, returning Thu, Oct 2, priced at ￥40,160 found 6 days ago
Hawaiian Airlines
Sat, Aug 16 - Sat, Aug 30
IAD
Washington
SEA
Seattle
￥40,520 Roundtrip, found 2 days ago
￥40,520
Roundtrip
found 2 days ago
Select Hawaiian Airlines flight, departing Sat, Aug 16 from Washington to Seattle, returning Sat, Aug 30, priced at ￥40,520 found 2 days ago
United
Sat, Aug 16 - Tue, Sep 2
IAD
Washington
SEA
Seattle
￥55,140 Roundtrip, found 2 days ago
￥55,140
Roundtrip
found 2 days ago
Select United flight, departing Sat, Aug 16 from Washington to Seattle, returning Tue, Sep 2, priced at ￥55,140 found 2 days ago
*Available to Expedia members.