฿4,470 Cheap Flights from Seattle (SEA) to Toronto (YTO)

View ฿4,470 flight on Fri, 29 May 2026Opens in a new window

Popular airlines from Seattle-Tacoma International Airport (SEA) to Toronto

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

Prices were available within the past 7 days and start at ฿4,470 for one-way flights and ฿10,670 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Fri, 29 May - Sun, 31 May
SEA
Seattle
YYZ
Toronto
฿10,670 Return, found 2 days ago
฿10,670
Return
found 2 days ago
Select United flight, departing Fri, 29 May from Seattle to Toronto, returning Sun, 31 May, priced at ฿10,670 found 2 days ago
WestJet
Fri, 29 May - Sun, 31 May
SEA
Seattle
YYZ
Toronto
฿10,825 Return, found 2 days ago
฿10,825
Return
found 2 days ago
Select WestJet flight, departing Fri, 29 May from Seattle to Toronto, returning Sun, 31 May, priced at ฿10,825 found 2 days ago
WestJet
Fri, 29 May - Sun, 31 May
SEA
Seattle
YYZ
Toronto
฿11,815 Return, found 2 days ago
฿11,815
Return
found 2 days ago
Select WestJet flight, departing Fri, 29 May from Seattle to Toronto, returning Sun, 31 May, priced at ฿11,815 found 2 days ago
American Airlines
Fri, 29 May - Sun, 31 May
SEA
Seattle
YYZ
Toronto
฿11,885 Return, found 2 days ago
฿11,885
Return
found 2 days ago
Select American Airlines flight, departing Fri, 29 May from Seattle to Toronto, returning Sun, 31 May, priced at ฿11,885 found 2 days ago
WestJet
Fri, 29 May - Sun, 31 May
SEA
Seattle
YYZ
Toronto
฿12,340 Return, found 2 days ago
฿12,340
Return
found 2 days ago
Select WestJet flight, departing Fri, 29 May from Seattle to Toronto, returning Sun, 31 May, priced at ฿12,340 found 2 days ago
American Airlines
Fri, 29 May - Sun, 31 May
SEA
Seattle
YYZ
Toronto
฿12,875 Return, found 2 days ago
฿12,875
Return
found 2 days ago
Select American Airlines flight, departing Fri, 29 May from Seattle to Toronto, returning Sun, 31 May, priced at ฿12,875 found 2 days ago
WestJet
Fri, 29 May - Sun, 31 May
SEA
Seattle
YYZ
Toronto
฿13,330 Return, found 2 days ago
฿13,330
Return
found 2 days ago
Select WestJet flight, departing Fri, 29 May from Seattle to Toronto, returning Sun, 31 May, priced at ฿13,330 found 2 days ago
American Airlines
Fri, 29 May - Sun, 31 May
SEA
Seattle
YYZ
Toronto
฿13,495 Return, found 2 days ago
฿13,495
Return
found 2 days ago
Select American Airlines flight, departing Fri, 29 May from Seattle to Toronto, returning Sun, 31 May, priced at ฿13,495 found 2 days ago
Air Canada
Fri, 29 May - Sun, 31 May
SEA
Seattle
YYZ
Toronto
฿13,890 Return, found 2 days ago
฿13,890
Return
found 2 days ago
Select Air Canada flight, departing Fri, 29 May from Seattle to Toronto, returning Sun, 31 May, priced at ฿13,890 found 2 days ago
Delta
Fri, 29 May - Sun, 31 May
SEA
Seattle
YYZ
Toronto
฿16,970 Return, found 2 days ago
฿16,970
Return
found 2 days ago
Select Delta flight, departing Fri, 29 May from Seattle to Toronto, returning Sun, 31 May, priced at ฿16,970 found 2 days ago

Frequently asked questions

How much is a flight from SEA to Toronto (YTO-All Airports)?
Based on fares offered within the last 7 days on Expedia for flights departing within the next year, round-trip journeys between SEA and Toronto (YTO-All Airports) start from ฿10,670. Book now to score the best price for your big adventure. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from Seattle - Tacoma Intl. Airport (SEA) to Toronto (YTO-All Airports)?
Each air carrier has its own terms and conditions. If you do decide to cancel, follow the instructions on our Customer Service Portal.
How do I find cheap flights from SEA to Toronto (YTO-All Airports) that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for SEA to Toronto (YTO-All Airports) flights, you'll see a "no change fees" filter for you to select.
How far is the flight from Seattle - Tacoma Intl. Airport (SEA) to Toronto (YTO-All Airports)?
It's around 3,300 kilometres from SeaTac to Ontario, so expect to be flying for a while. Keep yourself entertained by packing things like a magazine or a thrilling novel.
Which airlines fly direct from Seattle - Tacoma Intl. Airport (SEA) to Toronto (YTO-All Airports)?
Check out Air Canada (AC) if you want to fly straight from Sea-Tac Airport to Toronto (YTO-All Airports). This airline offers 30 flights monthly, so you're sure to find one that fits your travel plans.
Are SEA to Toronto (YTO-All Airports) flight tickets cheaper when they're purchased at the last minute?
Late planners can sometimes score a bargain, with some of the cheapest fares from Seattle - Tacoma Intl. Airport (SEA) to Toronto (YTO-All Airports) surfacing a few weeks prior to the departure date. If you'd rather book ahead of time, Expedia compares and updates all the best flight deals continuously — as early as a year in advance in some cases. It does depend on the carrier though, as not all airlines release prices that far in advance.

Travel information

Origin airport
Seattle - Tacoma Intl.
Destination airport
Pearson Intl.
Return price
฿10,670
Distance
3288 km
*Available to Expedia members.