S$155 Cheap Flights from Seattle to Toronto

View S$155 flight on Thu, 16 Oct, 2025Opens 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 S$155 for one-way flights and S$381 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Sat, 16 Aug - Sat, 23 Aug
SEA
Seattle
YYZ
Toronto
S$381 Return, found 6 days ago
S$381
Return
found 6 days ago
Select Air Canada flight, departing Sat, 16 Aug from Seattle to Toronto, returning Sat, 23 Aug, priced at S$381 found 6 days ago
United
Sat, 16 Aug - Sat, 23 Aug
SEA
Seattle
YYZ
Toronto
S$382 Return, found 6 days ago
S$382
Return
found 6 days ago
Select United flight, departing Sat, 16 Aug from Seattle to Toronto, returning Sat, 23 Aug, priced at S$382 found 6 days ago
Air Canada
Mon, 11 Aug - Tue, 19 Aug
SEA
Seattle
YYZ
Toronto
S$384 Return, found 4 days ago
S$384
Return
found 4 days ago
Select Air Canada flight, departing Mon, 11 Aug from Seattle to Toronto, returning Tue, 19 Aug, priced at S$384 found 4 days ago
Delta
Sat, 16 Aug - Sat, 23 Aug
SEA
Seattle
YYZ
Toronto
S$386 Return, found 6 days ago
S$386
Return
found 6 days ago
Select Delta flight, departing Sat, 16 Aug from Seattle to Toronto, returning Sat, 23 Aug, priced at S$386 found 6 days ago
WestJet
Mon, 11 Aug - Tue, 19 Aug
SEA
Seattle
YHM
Hamilton
S$389 Return, found 4 days ago
S$389
Return
found 4 days ago
Select WestJet flight, departing Mon, 11 Aug from Seattle to Hamilton, returning Tue, 19 Aug, priced at S$389 found 4 days ago
WestJet
Mon, 11 Aug - Tue, 19 Aug
SEA
Seattle
YKF
Kitchener
S$389 Return, found 4 days ago
S$389
Return
found 4 days ago
Select WestJet flight, departing Mon, 11 Aug from Seattle to Kitchener, returning Tue, 19 Aug, priced at S$389 found 4 days ago
WestJet
Mon, 11 Aug - Tue, 19 Aug
SEA
Seattle
YYZ
Toronto
S$391 Return, found 4 days ago
S$391
Return
found 4 days ago
Select WestJet flight, departing Mon, 11 Aug from Seattle to Toronto, returning Tue, 19 Aug, priced at S$391 found 4 days ago
Delta
Sat, 16 Aug - Sat, 23 Aug
SEA
Seattle
YYZ
Toronto
S$395 Return, found 6 days ago
S$395
Return
found 6 days ago
Select Delta flight, departing Sat, 16 Aug from Seattle to Toronto, returning Sat, 23 Aug, priced at S$395 found 6 days ago
WestJet
Mon, 11 Aug - Tue, 19 Aug
SEA
Seattle
YKF
Kitchener
S$402 Return, found 4 days ago
S$402
Return
found 4 days ago
Select WestJet flight, departing Mon, 11 Aug from Seattle to Kitchener, returning Tue, 19 Aug, priced at S$402 found 4 days ago
American Airlines
Mon, 11 Aug - Tue, 19 Aug
SEA
Seattle
YYZ
Toronto
S$487 Return, found 4 days ago
S$487
Return
found 4 days ago
Select American Airlines flight, departing Mon, 11 Aug from Seattle to Toronto, returning Tue, 19 Aug, priced at S$487 found 4 days ago

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

August is typically the cheapest month to fly

From S$246 - S$538 per traveller.

Graph displaying average flight prices per month

Seattle to Toronto route information
Origin airport
Seattle - Tacoma Intl.
Destination airport
Pearson Intl.
Return price
S$380
Distance
3288 km

Perfect flights from Seattle to Toronto

Your Journey from Seattle to Toronto

Start your unforgettable journey with Expedia. Our broad selection of flights from Seattle to Toronto caters to every travel need. Whether you're yearning for a romantic escape, a solo adventure, or a cultural immersion, we've got you covered.
 

Choosing Your Ideal Flight

With Expedia, you have access to a wide range of airlines, including Air Canada, United, Delta, WestJet, American Airlines. Our selection of flights from Seattle - Tacoma Intl. to YTO-All Airports caters to every traveler's requirements, ensuring your journey aligns with your schedule. With options from 20 airlines, you're bound to find the perfect flight.
 

Maximizing Value with Seattle to Toronto Flights

Experience the joy of finding cheap flights from Seattle - Tacoma Intl. to YTO-All Airports that fit your budget. Keep an eye out for our special deals and discounts, and check our flexible one-way fares from S$155 and roundtrip prices from S$381*.
 

Pre-Flight Essentials

Ensure a smooth journey from Seattle to Toronto with Expedia. From information about check-in times and in-flight amenities to guidance on baggage policies, we provide all the essentials to prepare you for your flight.
 

Experience the Vibrant Toronto

Picture yourself stepping off the plane in Toronto and immersing yourself in the unique atmosphere of . From local markets to cultural festivals, each city offers its distinct charm. Make the most of your trip by exploring local attractions and indulging in the local cuisine. With Expedia, explore all this and more, tailored to your budget.
 

Added Convenience on Your Seattle to Toronto Flight

Traveling with Expedia is more than just a flight. We offer details about in-flight amenities, baggage policies, and more to ensure a smooth and hassle-free journey. Choose from our variety of airlines and embark on a memorable journey from Seattle to Toronto.
 

Beyond the Flight – Exploring Toronto

With Expedia, your adventure extends beyond the flight. Explore Toronto at your own pace by renting a car or booking a hotel. Discover hidden gems off the beaten path and create unforgettable memories.
 

Book Your Flight from Seattle to Toronto with Confidence

Planning your next great adventure is a breeze with Expedia. Our user-friendly platform, unbeatable prices, and round-the-clock customer support make your travel experience seamless and stress-free. Embark on your journey from Seattle to Toronto with confidence. Book your travel arrangements with Expedia today.
 
*Note: Prices may vary based on availability and are subject to change.

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 S$381. 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

Toronto Airports

Toronto

Seattle to Pearson Intl.
S$380.20

Hamilton

Kitchener

*Available to Expedia members.