Flights to Northwest Washington from Denver - ￥9,440

View ￥9,440 flight on Thu, Sep 4, 2025Opens in a new window

Popular airlines from Denver to Northwest Washington

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    All Nippon Airways

  • Japan Airlines

    Japan Airlines

  • Jetstar Japan

    Jetstar Japan

  • Solaseed Air

    Solaseed Air

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    STARFLYER

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Cheap Flights from Denver to Northwest Washington (DEN-SEA)

Prices were available within the past 7 days and start at ￥9,440 for one-way flights and ￥18,760 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Thu, Aug 7 - Tue, Aug 12
DEN
Denver
SEA
Seattle
￥18,760 Roundtrip, found 6 days ago
￥18,760
Roundtrip
found 6 days ago
Select Delta flight, departing Thu, Aug 7 from Denver to Seattle, returning Tue, Aug 12, priced at ￥18,760 found 6 days ago
Hawaiian Airlines
Tue, Aug 5 - Wed, Aug 20
DEN
Denver
SEA
Seattle
￥22,990 Roundtrip, found 5 hours ago
￥22,990
Roundtrip
found 5 hours ago
Select Hawaiian Airlines flight, departing Tue, Aug 5 from Denver to Seattle, returning Wed, Aug 20, priced at ￥22,990 found 5 hours ago
Hawaiian Airlines
Tue, Aug 5 - Fri, Aug 22
DEN
Denver
SEA
Seattle
￥24,180 Roundtrip, found 5 hours ago
￥24,180
Roundtrip
found 5 hours ago
Select Hawaiian Airlines flight, departing Tue, Aug 5 from Denver to Seattle, returning Fri, Aug 22, priced at ￥24,180 found 5 hours ago
Delta
Thu, Aug 7 - Fri, Aug 22
DEN
Denver
SEA
Seattle
￥24,930 Roundtrip, found 5 hours ago
￥24,930
Roundtrip
found 5 hours ago
Select Delta flight, departing Thu, Aug 7 from Denver to Seattle, returning Fri, Aug 22, priced at ￥24,930 found 5 hours ago
United
Thu, Aug 7 - Tue, Aug 12
DEN
Denver
SEA
Seattle
￥37,040 Roundtrip, found 6 days ago
￥37,040
Roundtrip
found 6 days ago
Select United flight, departing Thu, Aug 7 from Denver to Seattle, returning Tue, Aug 12, priced at ￥37,040 found 6 days ago
American Airlines
Thu, Aug 28 - Fri, Aug 29
DEN
Denver
SEA
Seattle
￥64,340 Roundtrip, found 12 hours ago
￥64,340
Roundtrip
found 12 hours ago
Select American Airlines flight, departing Thu, Aug 28 from Denver to Seattle, returning Fri, Aug 29, priced at ￥64,340 found 12 hours ago

Find the cheapest month to fly from Denver (DEN) to Bellingham (BLI)

May is typically the cheapest month to fly

From ￥33,423 - ￥73,003 per traveler.

Graph displaying average flight prices per month

*Available to Expedia members.