Cheap flights from St. Louis to Blake Island from CA $108

View CA $108 flight on Tue, Aug. 19, 2025Opens in a new window

Popular airlines from St. Louis to Blake Island

  • Air Canada

    Air Canada

  • WestJet

    WestJet

  • Flair Airlines

    Flair Airlines

  • American Airlines

    American Airlines

  • United

    United

  • Delta

    Delta

  • Porter Airlines

    Porter Airlines

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Cheap flights from St. Louis (STL) to Blake Island (SEA)

Prices were available within the past 7 days and start at CA $108 for one-way flights and CA $257 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Wed, Oct. 22 - Mon, Oct. 27
STL
St. Louis
SEA
Seattle
CA $257 Roundtrip, found 2 days ago
CA $257
Roundtrip
found 2 days ago
Select American Airlines flight, departing Wed, Oct. 22 from St. Louis to Seattle, returning Mon, Oct. 27, priced at CA $257 found 2 days ago
American Airlines
Wed, Oct. 22 - Mon, Oct. 27
STL
St. Louis
SEA
Seattle
CA $275 Roundtrip, found 2 days ago
CA $275
Roundtrip
found 2 days ago
Select American Airlines flight, departing Wed, Oct. 22 from St. Louis to Seattle, returning Mon, Oct. 27, priced at CA $275 found 2 days ago
American Airlines
Wed, Oct. 22 - Mon, Oct. 27
STL
St. Louis
SEA
Seattle
CA $289 Roundtrip, found 2 days ago
CA $289
Roundtrip
found 2 days ago
Select American Airlines flight, departing Wed, Oct. 22 from St. Louis to Seattle, returning Mon, Oct. 27, priced at CA $289 found 2 days ago
Alaska Airlines
Wed, Oct. 22 - Mon, Oct. 27
STL
St. Louis
SEA
Seattle
CA $305 Roundtrip, found 2 days ago
CA $305
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Wed, Oct. 22 from St. Louis to Seattle, returning Mon, Oct. 27, priced at CA $305 found 2 days ago
Hawaiian Airlines
Tue, Jul. 29 - Wed, Aug. 20
STL
St. Louis
SEA
Seattle
CA $340 Roundtrip, found 6 days ago
CA $340
Roundtrip
found 6 days ago
Select Hawaiian Airlines flight, departing Tue, Jul. 29 from St. Louis to Seattle, returning Wed, Aug. 20, priced at CA $340 found 6 days ago
Delta
Wed, Oct. 22 - Mon, Oct. 27
STL
St. Louis
SEA
Seattle
CA $345 Roundtrip, found 2 days ago
CA $345
Roundtrip
found 2 days ago
Select Delta flight, departing Wed, Oct. 22 from St. Louis to Seattle, returning Mon, Oct. 27, priced at CA $345 found 2 days ago

Find the cheapest month to fly from St. Louis (STL) to Seattle (SEA)

September is typically the cheapest month to fly

From CA $188 - CA $298 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.