฿4,540 Cheap Flights from Seattle (SEA) to Toronto (YTO)

View ฿4,540 flight on Tue, 14 Oct 2025Opens 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 ฿4,540 for one-way flights and ฿10,445 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Sun, 12 Oct - Tue, 21 Oct
SEA
Seattle
YYZ
Toronto
฿10,445 Return, found 3 days ago
฿10,445
Return
found 3 days ago
Select United flight, departing Sun, 12 Oct from Seattle to Toronto, returning Tue, 21 Oct, priced at ฿10,445 found 3 days ago
United
Sun, 12 Oct - Tue, 21 Oct
SEA
Seattle
YYZ
Toronto
฿10,530 Return, found 3 days ago
฿10,530
Return
found 3 days ago
Select United flight, departing Sun, 12 Oct from Seattle to Toronto, returning Tue, 21 Oct, priced at ฿10,530 found 3 days ago
United
Sun, 12 Oct - Tue, 21 Oct
SEA
Seattle
YYZ
Toronto
฿10,695 Return, found 3 days ago
฿10,695
Return
found 3 days ago
Select United flight, departing Sun, 12 Oct from Seattle to Toronto, returning Tue, 21 Oct, priced at ฿10,695 found 3 days ago
WestJet
Sun, 12 Oct - Tue, 21 Oct
SEA
Seattle
YYZ
Toronto
฿11,010 Return, found 3 days ago
฿11,010
Return
found 3 days ago
Select WestJet flight, departing Sun, 12 Oct from Seattle to Toronto, returning Tue, 21 Oct, priced at ฿11,010 found 3 days ago
Air Canada
Sun, 12 Oct - Tue, 21 Oct
SEA
Seattle
YYZ
Toronto
฿11,075 Return, found 3 days ago
฿11,075
Return
found 3 days ago
Select Air Canada flight, departing Sun, 12 Oct from Seattle to Toronto, returning Tue, 21 Oct, priced at ฿11,075 found 3 days ago
United
Sun, 12 Oct - Tue, 21 Oct
SEA
Seattle
YYZ
Toronto
฿11,260 Return, found 3 days ago
฿11,260
Return
found 3 days ago
Select United flight, departing Sun, 12 Oct from Seattle to Toronto, returning Tue, 21 Oct, priced at ฿11,260 found 3 days ago
United
Sun, 12 Oct - Tue, 21 Oct
SEA
Seattle
YYZ
Toronto
฿11,320 Return, found 3 days ago
฿11,320
Return
found 3 days ago
Select United flight, departing Sun, 12 Oct from Seattle to Toronto, returning Tue, 21 Oct, priced at ฿11,320 found 3 days ago
United
Sun, 12 Oct - Tue, 21 Oct
SEA
Seattle
YYZ
Toronto
฿11,410 Return, found 3 days ago
฿11,410
Return
found 3 days ago
Select United flight, departing Sun, 12 Oct from Seattle to Toronto, returning Tue, 21 Oct, priced at ฿11,410 found 3 days ago
Alaska Airlines
Sun, 12 Oct - Tue, 21 Oct
SEA
Seattle
YYZ
Toronto
฿13,060 Return, found 3 days ago
฿13,060
Return
found 3 days ago
Select Alaska Airlines flight, departing Sun, 12 Oct from Seattle to Toronto, returning Tue, 21 Oct, priced at ฿13,060 found 3 days ago
American Airlines
Sun, 12 Oct - Tue, 21 Oct
SEA
Seattle
YYZ
Toronto
฿15,460 Return, found 3 days ago
฿15,460
Return
found 3 days ago
Select American Airlines flight, departing Sun, 12 Oct from Seattle to Toronto, returning Tue, 21 Oct, priced at ฿15,460 found 3 days ago

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

July is typically the cheapest month to fly

From ฿6,284 - ฿13,813 per traveller.

Graph displaying average flight prices per month

Flight from Seattle to Toronto route information
Origin airport
Seattle - Tacoma Intl.
Destination airport
Pearson Intl.
Return price
฿10,445
Distance
3288 km

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 ฿4,540 and roundtrip prices from ฿10,445. 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.

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 ฿10,445. 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.

Explore a world of travel with Expedia

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