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Cheap flights from Toronto (YTO) to Seattle (BFI)

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How to find the cheapest flight from Toronto (YTO) to Seattle (BFI)

How to find the cheapest flight from Toronto (YTO) to Seattle (BFI)
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How to find the cheapest flight from Toronto (YTO) to Seattle (BFI)
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How to find the cheapest flight from Toronto (YTO) to Seattle (BFI)
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Cheap flights from Toronto to Seattle in December 2025 , January 2026

22 Dec - 12 Jan $ 1,196.00
YTO
Toronto
WestJet
2 STOPS
BFI
Seattle
BFI
Seattle
WestJet
2 STOPS
YTO
Toronto
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22 Dec - 19 Jan $ 1,200.00
YTO
Toronto
Porter Airlines
2 STOPS
BFI
Seattle
BFI
Seattle
Porter Airlines
2 STOPS
YTO
Toronto
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22 Dec - 12 Jan $ 1,200.00
YTO
Toronto
Porter Airlines
2 STOPS
BFI
Seattle
BFI
Seattle
Porter Airlines
2 STOPS
YTO
Toronto
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Last minute flights from Toronto to Seattle

22 Dec - 31 Dec $ 1,441.00
YTO
Toronto
WestJet
2 STOPS
BFI
Seattle
BFI
Seattle
WestJet
2 STOPS
YTO
Toronto
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22 Dec - 01 Jan $ 1,542.00
YTO
Toronto
WestJet
2 STOPS
BFI
Seattle
BFI
Seattle
WestJet
2 STOPS
YTO
Toronto
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30 Dec - 01 Jan $ 1,565.00
YTO
Toronto
WestJet
2 STOPS
BFI
Seattle
BFI
Seattle
WestJet
2 STOPS
YTO
Toronto
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One-way flights to Seattle from Toronto

6:00 AM - 2:45 PM
Air Excursions
2 Stops
12h 35m
YTO - BFI
$ 787
Kiwi
Pick dates
6:00 AM - 2:45 PM
Air Excursions
2 Stops
12h 35m
YTO - BFI
$ 823
Kiwi
Pick dates
6:00 AM - 2:45 PM
Air Excursions
2 Stops
12h 35m
YTO - BFI
$ 823
Kiwi
Pick dates

How to find the cheapest flight from Toronto (YTO) to Seattle (BFI)

Related info for your journey
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How to find the cheapest flight from Toronto (YTO) to Seattle (BFI)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from Toronto (YTO) to Seattle (BFI)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.