฿3,410 Cheap Flights from Seattle (SEA) to Toronto (YTO)

View ฿3,410 flight on Sun, 31 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 ฿3,410 for one-way flights and ฿8,845 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Mon, 2 Mar - Sun, 8 Mar
SEA
Seattle
YYZ
Toronto
฿8,845 Return, found 6 days ago
฿8,845
Return
found 6 days ago
Select United flight, departing Mon, 2 Mar from Seattle to Toronto, returning Sun, 8 Mar, priced at ฿8,845 found 6 days ago
Delta
Fri, 1 May - Tue, 12 May
SEA
Seattle
YYZ
Toronto
฿9,050 Return, found 10 hours ago
฿9,050
Return
found 10 hours ago
Select Delta flight, departing Fri, 1 May from Seattle to Toronto, returning Tue, 12 May, priced at ฿9,050 found 10 hours ago
United
Fri, 1 May - Tue, 12 May
SEA
Seattle
YYZ
Toronto
฿9,250 Return, found 10 hours ago
฿9,250
Return
found 10 hours ago
Select United flight, departing Fri, 1 May from Seattle to Toronto, returning Tue, 12 May, priced at ฿9,250 found 10 hours ago
United
Fri, 1 May - Tue, 12 May
SEA
Seattle
YYZ
Toronto
฿9,290 Return, found 10 hours ago
฿9,290
Return
found 10 hours ago
Select United flight, departing Fri, 1 May from Seattle to Toronto, returning Tue, 12 May, priced at ฿9,290 found 10 hours ago
United
Fri, 1 May - Tue, 12 May
SEA
Seattle
YYZ
Toronto
฿9,465 Return, found 10 hours ago
฿9,465
Return
found 10 hours ago
Select United flight, departing Fri, 1 May from Seattle to Toronto, returning Tue, 12 May, priced at ฿9,465 found 10 hours ago
Air Canada
Mon, 2 Mar - Sun, 8 Mar
SEA
Seattle
YYZ
Toronto
฿9,535 Return, found 6 days ago
฿9,535
Return
found 6 days ago
Select Air Canada flight, departing Mon, 2 Mar from Seattle to Toronto, returning Sun, 8 Mar, priced at ฿9,535 found 6 days ago
Delta
Fri, 1 May - Tue, 12 May
SEA
Seattle
YYZ
Toronto
฿9,865 Return, found 10 hours ago
฿9,865
Return
found 10 hours ago
Select Delta flight, departing Fri, 1 May from Seattle to Toronto, returning Tue, 12 May, priced at ฿9,865 found 10 hours ago
United
Fri, 1 May - Tue, 12 May
SEA
Seattle
YYZ
Toronto
฿9,875 Return, found 10 hours ago
฿9,875
Return
found 10 hours ago
Select United flight, departing Fri, 1 May from Seattle to Toronto, returning Tue, 12 May, priced at ฿9,875 found 10 hours ago
American Airlines
Fri, 1 May - Tue, 12 May
SEA
Seattle
YYZ
Toronto
฿10,175 Return, found 10 hours ago
฿10,175
Return
found 10 hours ago
Select American Airlines flight, departing Fri, 1 May from Seattle to Toronto, returning Tue, 12 May, priced at ฿10,175 found 10 hours ago
WestJet
Fri, 1 May - Tue, 12 May
SEA
Seattle
YYZ
Toronto
฿10,555 Return, found 10 hours ago
฿10,555
Return
found 10 hours ago
Select WestJet flight, departing Fri, 1 May from Seattle to Toronto, returning Tue, 12 May, priced at ฿10,555 found 10 hours ago

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

May is typically the cheapest month to fly

From ฿6,252 - ฿17,831 per traveller.

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 ฿8,845. 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
฿8,845
Distance
3288 km

Book with confidence

Perfect flights from Seattle to Toronto

Embark on an unforgettable journey without breaking the bank with Expedia's incredible deals on cheap flights from Seattle to Toronto. Whether you're aching for a romantic escape with your partner, craving an adventurous solo expedition, or yearning to immerse yourself in the local history and culture, we've got you covered.
 
Picture yourself strolling through the streets of , surrounded by breathtaking architecture and absorbing the vibrant atmosphere of this captivating city. Indulge in the mouth-watering local specialties, from tantalizing street food to exquisite fine dining. With Expedia, you can experience all of this and more, without sacrificing your budget.
 
Our flexible Seattle - Tacoma Intl. to YTO-All Airports ticket options cater to your travel preferences, with incredible one-way fares from ฿3,410 and roundtrip prices from ฿8,845. Whether you're planning a short city break or a longer adventure, our dynamic pricing ensures that you find the best deals for your journey.
 
But the magic doesn't stop there. Expedia offers a range of partner services to enhance your trip. Rent a car at YTO-All Airports and explore and its surrounding areas at your own pace. Discover hidden gems off the beaten path, and create unforgettable memories. We also provide a handpicked selection of accommodations, from charming bed and breakfasts to luxury hotels, ensuring that you have a comfortable and memorable stay.
 
Planning your next great adventure is a breeze with Expedia. Our user-friendly platform, unbeatable prices, and round-the-clock customer support are designed to make your travel experience seamless and stress-free. So, why wait? Book your to travel arrangements today and embark on the journey of a lifetime in Toronto.
Perfect flights from Seattle to Toronto
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