S$156 Cheap Flights from Seattle to Toronto

View S$156 flight on Mon, 10 Nov, 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$156 for one-way flights and S$349 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Mon, 10 Nov - Wed, 7 Jan
SEA
Seattle
YYZ
Toronto
S$349 Return, found 19 hours ago
S$349
Return
found 19 hours ago
Select United flight, departing Mon, 10 Nov from Seattle to Toronto, returning Wed, 7 Jan, priced at S$349 found 19 hours ago
United
Mon, 10 Nov - Wed, 7 Jan
SEA
Seattle
YYZ
Toronto
S$349 Return, found 19 hours ago
S$349
Return
found 19 hours ago
Select United flight, departing Mon, 10 Nov from Seattle to Toronto, returning Wed, 7 Jan, priced at S$349 found 19 hours ago
Air Canada
Mon, 10 Nov - Wed, 7 Jan
SEA
Seattle
YYZ
Toronto
S$356 Return, found 19 hours ago
S$356
Return
found 19 hours ago
Select Air Canada flight, departing Mon, 10 Nov from Seattle to Toronto, returning Wed, 7 Jan, priced at S$356 found 19 hours ago
United
Thu, 16 Oct - Wed, 22 Oct
SEA
Seattle
YYZ
Toronto
S$373 Return, found 20 hours ago
S$373
Return
found 20 hours ago
Select United flight, departing Thu, 16 Oct from Seattle to Toronto, returning Wed, 22 Oct, priced at S$373 found 20 hours ago
United
Mon, 10 Nov - Wed, 7 Jan
SEA
Seattle
YYZ
Toronto
S$373 Return, found 19 hours ago
S$373
Return
found 19 hours ago
Select United flight, departing Mon, 10 Nov from Seattle to Toronto, returning Wed, 7 Jan, priced at S$373 found 19 hours ago
Air Canada
Mon, 10 Nov - Wed, 7 Jan
SEA
Seattle
YYZ
Toronto
S$375 Return, found 19 hours ago
S$375
Return
found 19 hours ago
Select Air Canada flight, departing Mon, 10 Nov from Seattle to Toronto, returning Wed, 7 Jan, priced at S$375 found 19 hours ago
United
Mon, 10 Nov - Wed, 7 Jan
SEA
Seattle
YYZ
Toronto
S$375 Return, found 19 hours ago
S$375
Return
found 19 hours ago
Select United flight, departing Mon, 10 Nov from Seattle to Toronto, returning Wed, 7 Jan, priced at S$375 found 19 hours ago
American Airlines
Wed, 13 Aug - Wed, 20 Aug
SEA
Seattle
YYZ
Toronto
S$376 Return, just found
S$376
Return
just found
Select American Airlines flight, departing Wed, 13 Aug from Seattle to Toronto, returning Wed, 20 Aug, priced at S$376 just found
Delta
Wed, 13 Aug - Wed, 20 Aug
SEA
Seattle
YYZ
Toronto
S$382 Return, just found
S$382
Return
just found
Select Delta flight, departing Wed, 13 Aug from Seattle to Toronto, returning Wed, 20 Aug, priced at S$382 just found
WestJet
Wed, 13 Aug - Wed, 20 Aug
SEA
Seattle
YYZ
Toronto
S$397 Return, just found
S$397
Return
just found
Select WestJet flight, departing Wed, 13 Aug from Seattle to Toronto, returning Wed, 20 Aug, priced at S$397 just found

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

May is typically the cheapest month to fly

From S$248 - S$523 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$348
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 United, Air Canada, Delta, American Airlines, WestJet. 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$156 and roundtrip prices from S$349*.
 

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$349. 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$348.30

Kitchener

Hamilton

*Available to Expedia members.