Cheap flights from Toronto to North Seattle

View AU$235 flight on Mon, 1 Sep. 2025Opens in a new window

Popular airlines from Toronto to North Seattle

  • Air Canada

    Air Canada

  • Delta

    Delta

  • WestJet

    WestJet

  • Alaska Airlines

    Alaska Airlines

  • United

    United

  • American Airlines

    American Airlines

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Cheap Flights from Toronto (YTO) to North Seattle (SEA)

Prices were available within the past 7 days for one-way flights and round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.

WestJet
Sat, 23 Aug. - Mon, 25 Aug.
YYZ
Toronto
SEA
Seattle
AU$392 Return, found 5 hours ago
AU$392
Return
found 5 hours ago
Select WestJet flight, departing Sat, 23 Aug. from Toronto to Seattle, returning Mon, 25 Aug., priced at AU$392 found 5 hours ago
Air Canada
Tue, 26 Aug. - Wed, 3 Sep.
YYZ
Toronto
SEA
Seattle
AU$404 Return, found 20 hours ago
AU$404
Return
found 20 hours ago
Select Air Canada flight, departing Tue, 26 Aug. from Toronto to Seattle, returning Wed, 3 Sep., priced at AU$404 found 20 hours ago
Air Canada
Thu, 28 Aug. - Sun, 31 Aug.
YYZ
Toronto
SEA
Seattle
AU$413 Return, found 20 hours ago
AU$413
Return
found 20 hours ago
Select Air Canada flight, departing Thu, 28 Aug. from Toronto to Seattle, returning Sun, 31 Aug., priced at AU$413 found 20 hours ago
Delta
Sat, 23 Aug. - Mon, 25 Aug.
YYZ
Toronto
SEA
Seattle
AU$433 Return, found 5 hours ago
AU$433
Return
found 5 hours ago
Select Delta flight, departing Sat, 23 Aug. from Toronto to Seattle, returning Mon, 25 Aug., priced at AU$433 found 5 hours ago
Alaska Airlines
Thu, 13 Nov. - Sat, 15 Nov.
YYZ
Toronto
SEA
Seattle
AU$438 Return, found 5 days ago
AU$438
Return
found 5 days ago
Select Alaska Airlines flight, departing Thu, 13 Nov. from Toronto to Seattle, returning Sat, 15 Nov., priced at AU$438 found 5 days ago
American Airlines
Thu, 13 Nov. - Sat, 15 Nov.
YYZ
Toronto
SEA
Seattle
AU$447 Return, found 5 days ago
AU$447
Return
found 5 days ago
Select American Airlines flight, departing Thu, 13 Nov. from Toronto to Seattle, returning Sat, 15 Nov., priced at AU$447 found 5 days ago

Find the cheapest month to fly from Toronto (YTO) to Seattle (SEA)

May is typically the cheapest month to fly

From AU$274 - AU$734 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.