Cheap flights from Washington to Blake Island from CA $142

View CA $142 flight on Mon, Jan. 5, 2026Opens in a new window

Popular airlines from Washington to Blake Island

  • Alaska Airlines

    Alaska Airlines

  • American Airlines

    American Airlines

  • Delta

    Delta

  • JetBlue Airways

    JetBlue Airways

  • Sun Country Airlines

    Sun Country Airlines

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Cheap flights from Washington (WAS) to Blake Island (SEA)

Prices were available within the past 7 days and start at CA $142 for one-way flights and CA $283 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Wed, Oct. 1 - Wed, Oct. 8
BWI
Baltimore
SEA
Seattle
CA $283 Roundtrip, found 1 day ago
CA $283
Roundtrip
found 1 day ago
Select American Airlines flight, departing Wed, Oct. 1 from Baltimore to Seattle, returning Wed, Oct. 8, priced at CA $283 found 1 day ago
Delta
Mon, Sep. 22 - Tue, Sep. 23
BWI
Baltimore
SEA
Seattle
CA $284 Roundtrip, found 2 days ago
CA $284
Roundtrip
found 2 days ago
Select Delta flight, departing Mon, Sep. 22 from Baltimore to Seattle, returning Tue, Sep. 23, priced at CA $284 found 2 days ago
Delta
Wed, Oct. 1 - Wed, Oct. 8
BWI
Baltimore
SEA
Seattle
CA $286 Roundtrip, found 1 day ago
CA $286
Roundtrip
found 1 day ago
Select Delta flight, departing Wed, Oct. 1 from Baltimore to Seattle, returning Wed, Oct. 8, priced at CA $286 found 1 day ago
Alaska Airlines
Wed, Oct. 1 - Wed, Oct. 8
BWI
Baltimore
SEA
Seattle
CA $308 Roundtrip, found 1 day ago
CA $308
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Wed, Oct. 1 from Baltimore to Seattle, returning Wed, Oct. 8, priced at CA $308 found 1 day ago
Sun Country Airlines
Mon, Aug. 18 - Tue, Aug. 26
BWI
Baltimore
SEA
Seattle
CA $355 Roundtrip, found 2 days ago
CA $355
Roundtrip
found 2 days ago
Select Sun Country Airlines flight, departing Mon, Aug. 18 from Baltimore to Seattle, returning Tue, Aug. 26, priced at CA $355 found 2 days ago
Hawaiian Airlines
Tue, Sep. 23 - Wed, Sep. 24
IAD
Washington
SEA
Seattle
CA $366 Roundtrip, found 2 days ago
CA $366
Roundtrip
found 2 days ago
Select Hawaiian Airlines flight, departing Tue, Sep. 23 from Washington to Seattle, returning Wed, Sep. 24, priced at CA $366 found 2 days ago

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

September is typically the cheapest month to fly

From CA $189 - CA $346 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.