Cheap flights from Seattle to Central Ontario

View AU$187 flight on Tue, 30 Sep. 2025Opens in a new window

Popular airlines from Seattle to Central Ontario

  • Air Canada

    Air Canada

  • American Airlines

    American Airlines

  • Alaska Airlines

    Alaska Airlines

  • United

    United

  • WestJet

    WestJet

  • Delta

    Delta

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Cheap Flights from Seattle (SEA) to Central Ontario (YTO)

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.

United
Wed, 10 Sep. - Wed, 17 Sep.
SEA
Seattle
YYZ
Toronto
AU$419 Return, found 5 hours ago
AU$419
Return
found 5 hours ago
Select United flight, departing Wed, 10 Sep. from Seattle to Toronto, returning Wed, 17 Sep., priced at AU$419 found 5 hours ago
WestJet
Sun, 7 Sep. - Tue, 16 Sep.
SEA
Seattle
YYZ
Toronto
AU$421 Return, found 2 days ago
AU$421
Return
found 2 days ago
Select WestJet flight, departing Sun, 7 Sep. from Seattle to Toronto, returning Tue, 16 Sep., priced at AU$421 found 2 days ago
WestJet
Wed, 10 Sep. - Wed, 17 Sep.
SEA
Seattle
YYZ
Toronto
AU$428 Return, found 5 hours ago
AU$428
Return
found 5 hours ago
Select WestJet flight, departing Wed, 10 Sep. from Seattle to Toronto, returning Wed, 17 Sep., priced at AU$428 found 5 hours ago
Alaska Airlines
Wed, 10 Sep. - Wed, 17 Sep.
SEA
Seattle
YYZ
Toronto
AU$433 Return, found 5 hours ago
AU$433
Return
found 5 hours ago
Select Alaska Airlines flight, departing Wed, 10 Sep. from Seattle to Toronto, returning Wed, 17 Sep., priced at AU$433 found 5 hours ago
Air Canada
Fri, 22 Aug. - Mon, 1 Sep.
SEA
Seattle
YYZ
Toronto
AU$437 Return, found 3 days ago
AU$437
Return
found 3 days ago
Select Air Canada flight, departing Fri, 22 Aug. from Seattle to Toronto, returning Mon, 1 Sep., priced at AU$437 found 3 days ago
Delta
Fri, 5 Sep. - Mon, 8 Sep.
SEA
Seattle
YYZ
Toronto
AU$445 Return, found 2 days ago
AU$445
Return
found 2 days ago
Select Delta flight, departing Fri, 5 Sep. from Seattle to Toronto, returning Mon, 8 Sep., priced at AU$445 found 2 days ago

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

January is typically the cheapest month to fly

From AU$345 - AU$877 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.