₩235,900 Cheap Flights from Seattle (SEA) to Toronto (YTO)

View ₩235,900 flight on Thu, May 7, 2026Opens in a new window

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

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Cheap Flights from Seattle to Toronto (SEA-YTO)

Prices were available within the past 7 days and start at ₩235,900 for one-way flights and ₩558,600 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Thu, May 7 - Mon, May 11
SEA
Seattle
YYZ
Toronto
₩558,600 Roundtrip, found 4 days ago
₩558,600
Roundtrip
found 4 days ago
Select Delta flight, departing Thu, May 7 from Seattle to Toronto, returning Mon, May 11, priced at ₩558,600 found 4 days ago
Delta
Thu, May 7 - Mon, May 11
SEA
Seattle
YYZ
Toronto
₩616,300 Roundtrip, found 4 days ago
₩616,300
Roundtrip
found 4 days ago
Select Delta flight, departing Thu, May 7 from Seattle to Toronto, returning Mon, May 11, priced at ₩616,300 found 4 days ago
Delta
Thu, May 7 - Mon, May 11
SEA
Seattle
YYZ
Toronto
₩625,700 Roundtrip, found 4 days ago
₩625,700
Roundtrip
found 4 days ago
Select Delta flight, departing Thu, May 7 from Seattle to Toronto, returning Mon, May 11, priced at ₩625,700 found 4 days ago
Delta
Thu, May 7 - Mon, May 11
SEA
Seattle
YYZ
Toronto
₩639,200 Roundtrip, found 4 days ago
₩639,200
Roundtrip
found 4 days ago
Select Delta flight, departing Thu, May 7 from Seattle to Toronto, returning Mon, May 11, priced at ₩639,200 found 4 days ago
United
Thu, May 7 - Mon, May 11
SEA
Seattle
YYZ
Toronto
₩645,200 Roundtrip, found 4 days ago
₩645,200
Roundtrip
found 4 days ago
Select United flight, departing Thu, May 7 from Seattle to Toronto, returning Mon, May 11, priced at ₩645,200 found 4 days ago
Delta
Thu, May 7 - Mon, May 11
SEA
Seattle
YYZ
Toronto
₩645,500 Roundtrip, found 4 days ago
₩645,500
Roundtrip
found 4 days ago
Select Delta flight, departing Thu, May 7 from Seattle to Toronto, returning Mon, May 11, priced at ₩645,500 found 4 days ago
Delta
Thu, May 7 - Mon, May 11
SEA
Seattle
YYZ
Toronto
₩647,500 Roundtrip, found 4 days ago
₩647,500
Roundtrip
found 4 days ago
Select Delta flight, departing Thu, May 7 from Seattle to Toronto, returning Mon, May 11, priced at ₩647,500 found 4 days ago
Delta
Thu, May 7 - Mon, May 11
SEA
Seattle
YYZ
Toronto
₩659,000 Roundtrip, found 4 days ago
₩659,000
Roundtrip
found 4 days ago
Select Delta flight, departing Thu, May 7 from Seattle to Toronto, returning Mon, May 11, priced at ₩659,000 found 4 days ago
American Airlines
Thu, May 7 - Mon, May 11
SEA
Seattle
YYZ
Toronto
₩686,100 Roundtrip, found 4 days ago
₩686,100
Roundtrip
found 4 days ago
Select American Airlines flight, departing Thu, May 7 from Seattle to Toronto, returning Mon, May 11, priced at ₩686,100 found 4 days ago
Air Canada
Thu, May 7 - Mon, May 11
SEA
Seattle
YYZ
Toronto
₩689,600 Roundtrip, found 4 days ago
₩689,600
Roundtrip
found 4 days ago
Select Air Canada flight, departing Thu, May 7 from Seattle to Toronto, returning Mon, May 11, priced at ₩689,600 found 4 days ago

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

May is typically the cheapest month to fly

From ₩283,635 - ₩808,987 per traveler.

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 ₩558,600. 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 kilometers 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.
Roundtrip price
₩558,600
Distance
3288 km
*Available to Expedia members.