฿4,330 Cheap Flights from Seattle (SEA) to Toronto (YTO)

View ฿4,330 flight on Thu, 11 Dec 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 ฿4,330 for one-way flights and ฿9,975 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Sat, 6 Dec - Sat, 13 Dec
SEA
Seattle
YYZ
Toronto
฿9,975 Return, found 6 days ago
฿9,975
Return
found 6 days ago
Select Delta flight, departing Sat, 6 Dec from Seattle to Toronto, returning Sat, 13 Dec, priced at ฿9,975 found 6 days ago
United
Sat, 6 Dec - Sat, 13 Dec
SEA
Seattle
YYZ
Toronto
฿10,060 Return, found 6 days ago
฿10,060
Return
found 6 days ago
Select United flight, departing Sat, 6 Dec from Seattle to Toronto, returning Sat, 13 Dec, priced at ฿10,060 found 6 days ago
Delta
Sat, 6 Dec - Sat, 13 Dec
SEA
Seattle
YYZ
Toronto
฿10,545 Return, found 6 days ago
฿10,545
Return
found 6 days ago
Select Delta flight, departing Sat, 6 Dec from Seattle to Toronto, returning Sat, 13 Dec, priced at ฿10,545 found 6 days ago
Delta
Sat, 6 Dec - Sat, 13 Dec
SEA
Seattle
YYZ
Toronto
฿10,635 Return, found 6 days ago
฿10,635
Return
found 6 days ago
Select Delta flight, departing Sat, 6 Dec from Seattle to Toronto, returning Sat, 13 Dec, priced at ฿10,635 found 6 days ago
Delta
Sat, 6 Dec - Sat, 13 Dec
SEA
Seattle
YYZ
Toronto
฿10,770 Return, found 6 days ago
฿10,770
Return
found 6 days ago
Select Delta flight, departing Sat, 6 Dec from Seattle to Toronto, returning Sat, 13 Dec, priced at ฿10,770 found 6 days ago
Delta
Sat, 6 Dec - Sat, 13 Dec
SEA
Seattle
YYZ
Toronto
฿10,835 Return, found 6 days ago
฿10,835
Return
found 6 days ago
Select Delta flight, departing Sat, 6 Dec from Seattle to Toronto, returning Sat, 13 Dec, priced at ฿10,835 found 6 days ago
United
Sat, 6 Dec - Sat, 13 Dec
SEA
Seattle
YYZ
Toronto
฿10,940 Return, found 6 days ago
฿10,940
Return
found 6 days ago
Select United flight, departing Sat, 6 Dec from Seattle to Toronto, returning Sat, 13 Dec, priced at ฿10,940 found 6 days ago
Air Canada
Sat, 6 Dec - Sat, 13 Dec
SEA
Seattle
YYZ
Toronto
฿11,020 Return, found 6 days ago
฿11,020
Return
found 6 days ago
Select Air Canada flight, departing Sat, 6 Dec from Seattle to Toronto, returning Sat, 13 Dec, priced at ฿11,020 found 6 days ago
American Airlines
Sat, 6 Dec - Sat, 13 Dec
SEA
Seattle
YYZ
Toronto
฿11,215 Return, found 6 days ago
฿11,215
Return
found 6 days ago
Select American Airlines flight, departing Sat, 6 Dec from Seattle to Toronto, returning Sat, 13 Dec, priced at ฿11,215 found 6 days ago
WestJet
Sat, 6 Dec - Sat, 13 Dec
SEA
Seattle
YYZ
Toronto
฿12,900 Return, found 6 days ago
฿12,900
Return
found 6 days ago
Select WestJet flight, departing Sat, 6 Dec from Seattle to Toronto, returning Sat, 13 Dec, priced at ฿12,900 found 6 days ago

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

May is typically the cheapest month to fly

From ฿6,283 - ฿17,513 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 ฿9,975. 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
฿9,975
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 ฿4,330 and roundtrip prices from ฿9,975. 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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