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Cheap flights from Seattle to Toronto from C$ 261

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Toronto departing on 16/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Find the cheapest flights from Seattle to Toronto

Cheap round-trip flights

Enter your travel dates to find the best prices.
WestJet Logo
7:35 p.m. - 5:45 a.m.SEA  Seattle/Tacoma Intl-YYZ Toronto Pearson Intl
7h 10m1 stop Calgary
WestJet Logo
12:40 p.m. - 6:45 p.m.YYZ  Toronto Pearson Intl-SEA Seattle/Tacoma Intl
9h 05m2 stops Winnipeg Calgary
C$ 525WestJet
Mon, 28 Sep - Wed, 30 Sep
WestJet Logo
10:30 a.m. - 9:15 p.m.SEA  Seattle/Tacoma Intl-YYZ Toronto Pearson Intl
7h 45m1 stop Calgary
WestJet Logo
12:40 p.m. - 6:45 p.m.YYZ  Toronto Pearson Intl-SEA Seattle/Tacoma Intl
9h 05m2 stops Winnipeg Calgary
C$ 525WestJet
Wed, 23 Sep - Wed, 30 Sep
WestJet Logo
10:30 a.m. - 9:15 p.m.SEA  Seattle/Tacoma Intl-YYZ Toronto Pearson Intl
7h 45m1 stop Calgary
WestJet Logo
12:00 p.m. - 6:45 p.m.YYZ  Toronto Pearson Intl-SEA Seattle/Tacoma Intl
9h 45m1 stop Calgary
C$ 527WestJet
Wed, 7 Oct - Sat, 10 Oct
Multiple Airlines Logo
7:35 p.m. - 5:45 a.m.SEA  Seattle/Tacoma Intl-YYZ Toronto Pearson Intl
7h 10m1 stop Calgary
Multiple Airlines Logo
8:30 p.m. - 11:31 a.m.YYZ  Toronto Pearson Intl-SEA Seattle/Tacoma Intl
18h 01m1 stop Las Vegas Harry Reid Intl
C$ 528Multiple Airlines
Thu, 22 Oct - Fri, 6 Nov
Multiple Airlines Logo
10:30 a.m. - 9:15 p.m.SEA  Seattle/Tacoma Intl-YYZ Toronto Pearson Intl
7h 45m1 stop Calgary
Multiple Airlines Logo
8:30 p.m. - 11:31 a.m.YYZ  Toronto Pearson Intl-SEA Seattle/Tacoma Intl
18h 01m1 stop Las Vegas Harry Reid Intl
C$ 528Multiple Airlines
Fri, 23 Oct - Fri, 6 Nov
Multiple Airlines Logo
10:30 a.m. - 9:15 p.m.SEA  Seattle/Tacoma Intl-YYZ Toronto Pearson Intl
7h 45m1 stop Calgary
Multiple Airlines Logo
8:30 p.m. - 11:31 a.m.YYZ  Toronto Pearson Intl-SEA Seattle/Tacoma Intl
18h 01m1 stop Las Vegas Harry Reid Intl
C$ 528Multiple Airlines
Mon, 19 Oct - Fri, 6 Nov
Air Canada Logo
8:40 a.m. - 7:57 p.m.SEA  Seattle/Tacoma Intl-YYZ Toronto Pearson Intl
8h 17m1 stop Vancouver Intl
Air Canada Logo
4:50 p.m. - 9:57 p.m.YYZ  Toronto Pearson Intl-SEA Seattle/Tacoma Intl
8h 07m1 stop Vancouver Intl
C$ 621Air Canada
Sun, 15 Nov - Sat, 21 Nov
Air Canada Logo
8:40 a.m. - 7:57 p.m.SEA  Seattle/Tacoma Intl-YYZ Toronto Pearson Intl
8h 17m1 stop Vancouver Intl
Air Canada Logo
8:00 a.m. - 2:37 p.m.YYZ  Toronto Pearson Intl-SEA Seattle/Tacoma Intl
9h 37m2 stops Regina Vancouver Intl
C$ 621Air Canada
Sun, 15 Nov - Sat, 21 Nov
Alaska Airlines Logo
7:52 a.m. - 3:45 p.m.SEA  Seattle/Tacoma Intl-YYZ Toronto Pearson Intl
4h 53mdirect
Alaska Airlines Logo
4:55 p.m. - 7:13 p.m.YYZ  Toronto Pearson Intl-SEA Seattle/Tacoma Intl
5h 18mdirect
C$ 622Alaska Airlines
Sat, 19 Sep - Tue, 22 Sep
Alaska Airlines Logo
7:52 a.m. - 3:45 p.m.SEA  Seattle/Tacoma Intl-YYZ Toronto Pearson Intl
4h 53mdirect
Alaska Airlines Logo
4:55 p.m. - 7:13 p.m.YYZ  Toronto Pearson Intl-SEA Seattle/Tacoma Intl
5h 18mdirect
C$ 642Alaska Airlines
Sat, 26 Sep - Fri, 2 Oct

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WestJet flights from Seattle to Toronto

Our best WestJet deals on Seattle to Toronto flight tickets
WestJet
23 Sep
SEA10:30 a.m.Seattle/Tacoma Intl
7h 45m
1 stop
YYZ9:15 p.m.Toronto Pearson Intl
30 Sep
YYZ12:40 p.m.Toronto Pearson Intl
9h 05m
2 stops
SEA6:45 p.m.Seattle/Tacoma Intl
C$ 525
WestJet
7 Oct
SEA10:30 a.m.Seattle/Tacoma Intl
7h 45m
1 stop
YYZ9:15 p.m.Toronto Pearson Intl
10 Oct
YYZ12:00 p.m.Toronto Pearson Intl
9h 45m
1 stop
SEA6:45 p.m.Seattle/Tacoma Intl
C$ 527
WestJet
17 Sep
SEA7:35 p.m.Seattle/Tacoma Intl
7h 10m
1 stop
YYZ5:45 a.m.Toronto Pearson Intl
24 Sep
YYZ12:40 p.m.Toronto Pearson Intl
9h 05m
2 stops
SEA6:45 p.m.Seattle/Tacoma Intl
C$ 528

Air Canada flights from Seattle to Toronto

Our best Air Canada deals on Seattle to Toronto flight tickets
Air Canada
14 Sep
SEA5:50 a.m.Seattle/Tacoma Intl
9h 30m
2 stops
YTZ6:20 p.m.Toronto Island
21 Sep
YTZ3:35 p.m.Toronto Island
10h 12m
2 stops
SEA10:47 p.m.Seattle/Tacoma Intl
C$ 695
Air Canada
17 Oct
SEA7:20 p.m.Seattle/Tacoma Intl
9h 25m
2 stops
YTZ7:45 a.m.Toronto Island
24 Oct
YTZ3:35 p.m.Toronto Island
10h 07m
2 stops
SEA10:42 p.m.Seattle/Tacoma Intl
C$ 701
Air Canada
19 Aug
SEA10:40 a.m.Seattle/Tacoma Intl
11h 18m
2 stops
YYZ12:58 a.m.Toronto Pearson Intl
8 Sep
YYZ6:30 p.m.Toronto Pearson Intl
7h 17m
1 stop
SEA10:47 p.m.Seattle/Tacoma Intl
C$ 844

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Toronto that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 96,600 searches. Data last updated 7 August 2026.
Use the filters below to find and compare flights from Seattle to Toronto that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleToronto

SEA Seattle/Tacoma Intl - YYZ Toronto Pearson Intl

SEAYYZ

Seattle/Tacoma Intl

Mon 28/9

7:35 p.m.-5:45 a.m.

1 stop7h 10m

Toronto Pearson Intl

Wed 30/9

12:40 p.m.-6:45 p.m.

2 stops9h 05m

C$ 525

SeattleToronto

SEA Seattle/Tacoma Intl - YYZ Toronto Pearson Intl

SEAYYZ

Seattle/Tacoma Intl

Wed 23/9

10:30 a.m.-9:15 p.m.

1 stop7h 45m

Toronto Pearson Intl

Wed 30/9

12:40 p.m.-6:45 p.m.

2 stops9h 05m

C$ 525

SeattleToronto

SEA Seattle/Tacoma Intl - YYZ Toronto Pearson Intl

SEAYYZ

Seattle/Tacoma Intl

Wed 7/10

10:30 a.m.-9:15 p.m.

1 stop7h 45m

Toronto Pearson Intl

Sat 10/10

12:00 p.m.-6:45 p.m.

1 stop9h 45m

C$ 527

SeattleToronto

SEA Seattle/Tacoma Intl - YYZ Toronto Pearson Intl

SEAYYZ

Seattle/Tacoma Intl

Thu 22/10

7:35 p.m.-5:45 a.m.

1 stop7h 10m

Toronto Pearson Intl

Fri 6/11

8:30 p.m.-11:31 a.m.

1 stop18h 01m

C$ 528

SeattleToronto

SEA Seattle/Tacoma Intl - YYZ Toronto Pearson Intl

SEAYYZ

Seattle/Tacoma Intl

Fri 23/10

10:30 a.m.-9:15 p.m.

1 stop7h 45m

Toronto Pearson Intl

Fri 6/11

8:30 p.m.-11:31 a.m.

1 stop18h 01m

C$ 528

SeattleToronto

SEA Seattle/Tacoma Intl - YYZ Toronto Pearson Intl

SEAYYZ

Seattle/Tacoma Intl

Mon 19/10

10:30 a.m.-9:15 p.m.

1 stop7h 45m

Toronto Pearson Intl

Fri 6/11

8:30 p.m.-11:31 a.m.

1 stop18h 01m

C$ 528

SeattleToronto

SEA Seattle/Tacoma Intl - YYZ Toronto Pearson Intl

SEAYYZ

Seattle/Tacoma Intl

Sun 15/11

8:40 a.m.-7:57 p.m.

1 stop8h 17m

Toronto Pearson Intl

Sat 21/11

4:50 p.m.-9:57 p.m.

1 stop8h 07m

C$ 621

SeattleToronto

SEA Seattle/Tacoma Intl - YYZ Toronto Pearson Intl

SEAYYZ

Seattle/Tacoma Intl

Sun 15/11

8:40 a.m.-7:57 p.m.

1 stop8h 17m

Toronto Pearson Intl

Sat 21/11

8:00 a.m.-2:37 p.m.

2 stops9h 37m

C$ 621
Quickest round-trip

SeattleToronto

SEA Seattle/Tacoma Intl - YYZ Toronto Pearson Intl

SEAYYZ

Seattle/Tacoma Intl

Sat 19/9

7:52 a.m.-3:45 p.m.

Nonstop4h 53m

Toronto Pearson Intl

Tue 22/9

4:55 p.m.-7:13 p.m.

Nonstop5h 18m

C$ 622

SeattleToronto

SEA Seattle/Tacoma Intl - YYZ Toronto Pearson Intl

SEAYYZ

Seattle/Tacoma Intl

Sat 26/9

7:52 a.m.-3:45 p.m.

Nonstop4h 53m

Toronto Pearson Intl

Fri 2/10

4:55 p.m.-7:13 p.m.

Nonstop5h 18m

C$ 642

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Toronto from

How to get the cheapest flight ticket from Seattle to Toronto

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between Seattle and Toronto?

Prices are currently low for flights on this route.

Typical prices usually range from C$ 562 to C$ 1,027.
The lowest price recently found on this route was C$ 525.

What is the cheapest month to fly to Toronto?

The month of January is, on average, the cheapest month to fly to Toronto from Seattle, with most prices found around C$ 362. The month of February is another great option to travel to Toronto, with average flight prices from Seattle averaging around C$ 395.

What is the cheapest day to depart on your flight to Toronto?

According to our data, Thursday is the cheapest day to fly to Toronto from Seattle. The lowest ticket price found for a Thursday departure recently was C$ 756. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Flights from Seattle to Toronto on a Monday will generally be more expensive and average around C$ 987. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest Seattle/Tacoma Intl to Toronto flight route?

Fly from Seattle/Tacoma Intl to Toronto Pearson Intl for the best Seattle/Tacoma Intl - Toronto flight prices

How far in advance should I book a flight from Seattle to Toronto?

You are more likely to see cheaper flights to Toronto from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Toronto for around C$ 559 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Toronto from Seattle for as low as C$ 446 on momondo.

What cabin class options are available on Seattle to Toronto flights?

There are 3 cabin classes available to choose from on Seattle to Toronto flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Seattle to Toronto flights?

No. A direct flight is the cheapest option for a flight between Seattle to Toronto.

How have Seattle to Toronto flight prices changed over time?

As of August 2026, prices for Seattle to Toronto flights are approximately 12% cheaper when compared to flights at the same time last year.

When to book flights from Seattle to Toronto

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to Toronto according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Seattle to Toronto (SEA to YTO) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Toronto

Best price found

C$ 441

Fastest flight time

4h 39m

Direct flights

Every day

Airports in Toronto

3 airports
The best one-way flight to Toronto from Seattle in the past 72 hours is C$ 441. The best round-trip flight deal from Seattle to Toronto found on momondo in the last 72 hours is C$ 906.
The fastest flight from Seattle to Toronto takes 4h 39m
Direct flights go from Seattle to Toronto every day.
There are 3 airports in Toronto. From Seattle there are direct flights to Toronto Pearson Intl (YYZ).
Search flight deals

Frequently asked questions about flying from Seattle to Toronto

  • How far is Seattle/Tacoma Intl to Toronto by plane?

    There are 3323.4 km between Seattle/Tacoma Intl and Toronto. In terms of flight time, this usually takes a little over 4h 39m.

  • When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Toronto?

    Prices for flights from Seattle/Tacoma Intl Airport to Toronto are updated daily.

  • How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Toronto?

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to Toronto?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Toronto.

  • What documentation or ID do you need to fly to Toronto?

    The travel and health documents required for your trip to Toronto can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Toronto. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from Seattle to Toronto?

  • What is the most popular airline from Seattle to Toronto?

Best airlines flying from Seattle to Toronto

Compare and see reviews for airlines that fly from Seattle to Toronto with momondo
Airline
Rating
Free Cancellation
Price
Air CanadaPriceFrom C$ 263Free CancellationRating
7.1
11,437 reviews
Search Air Canada flights
Alaska AirlinesPriceFrom C$ 285Free CancellationRating
7.9
12,777 reviews
Search Alaska Airlines flights
WestJetPriceFrom C$ 289Free CancellationRating
7.2
3,426 reviews
Search WestJet flights

  • Alaska Airlines Flights From Seattle to Toronto

    Alaska Airlines is one of the most popular airlines flying from Seattle to Toronto, operating 5 flights/week on average for this route. A good Alaska Airlines flight deal for Seattle to Toronto starts from C$ 285 round-trip, up to an average price of C$ 783. Our users have rated Alaska Airlines at 7.9/10.

  • Air Canada Flights From Seattle to Toronto

    Another popular option for Seattle to Toronto flights is Air Canada (7.1/10, 11,437 ratings). Air Canada flies from Seattle to Toronto around 7 times per week, with deals starting from C$ 263 round-trip and rising to an average price of around C$ 545.

Travelling to a place near Toronto?

Book flights to Toronto if you plan to visit one of these locations
Apsley

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Toronto?

It is quick and easy to find Seattle to Toronto flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Toronto that suits you.

Can I find flights from Seattle to Toronto with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Toronto from Seattle with this policy.

How can momondo help me find flights from Seattle to Toronto?

Once you have performed a search for Seattle to Toronto flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Seattle to Toronto right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Seattle to Toronto flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

An easier way to manage your Toronto trip

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Find better results for your trip to Canada

Fly into one of these airports located in Toronto

Airports listed have a maximum distance of 83.6 km from Toronto
Toronto Region of Waterloo Intl Airport
Toronto Island Airport
Toronto Pearson Intl Airport