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Cheap flights from Seattle to Toronto from C$ 125

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 25/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Cheap round-trip flights

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Multiple Airlines Logo
6:07 p.m. - 6:47 a.m.SEA-YYZ
9h 40m1 stop
Multiple Airlines Logo
7:45 a.m. - 2:20 p.m.YYZ-SEA
9h 35m1 stop
C$ 340Multiple Airlines
Find Deal
Thu, 8 Jan - Mon, 12 Jan
WestJet Logo
3:10 p.m. - 5:58 a.m.SEA-YYZ
11h 48m2 stops
WestJet Logo
7:45 a.m. - 2:20 p.m.YYZ-SEA
9h 35m1 stop
C$ 342WestJet
Find Deal
Thu, 4 Dec - Thu, 11 Dec
Multiple Airlines Logo
7:55 a.m. - 3:35 p.m.SEA-YYZ
4h 40mdirect
Multiple Airlines Logo
7:45 a.m. - 2:20 p.m.YYZ-SEA
9h 35m1 stop
C$ 343Multiple Airlines
Find Deal
Tue, 9 Dec - Wed, 10 Dec
WestJet Logo
11:55 a.m. - 11:39 p.m.SEA-YYZ
8h 44m2 stops
WestJet Logo
6:30 p.m. - 2:20 p.m.YYZ-SEA
22h 50m1 stop
C$ 345WestJet
Find Deal
Sat, 29 Nov - Sat, 6 Dec
Alaska Airlines Logo
7:55 a.m. - 3:35 p.m.SEA-YYZ
4h 40mdirect
Alaska Airlines Logo
4:45 p.m. - 7:18 p.m.YYZ-SEA
5h 33mdirect
C$ 352Alaska Airlines
Find Deal
Tue, 9 Dec - Wed, 10 Dec
Air Canada Logo
10:05 a.m. - 10:41 p.m.SEA-YYZ
9h 36m2 stops
Air Canada Logo
8:15 a.m. - 2:31 p.m.YYZ-SEA
9h 16m2 stops
C$ 353Air Canada
Find Deal
Sat, 29 Nov - Sat, 6 Dec
Air Canada Logo
10:05 a.m. - 10:41 p.m.SEA-YYZ
9h 36m2 stops
Air Canada Logo
7:50 p.m. - 10:16 p.m.YYZ-SEA
5h 26mdirect
C$ 354Air Canada
Find Deal
Sat, 29 Nov - Sat, 6 Dec
Alaska Airlines Logo
7:55 a.m. - 3:35 p.m.SEA-YYZ
4h 40mdirect
Alaska Airlines Logo
4:45 p.m. - 7:18 p.m.YYZ-SEA
5h 33mdirect
C$ 367Alaska Airlines
Find Deal
Tue, 9 Dec - Thu, 11 Dec
United Airlines Logo
5:00 a.m. - 3:02 p.m.SEA-YYZ
7h 02m1 stop
United Airlines Logo
5:55 p.m. - 12:50 a.m.YYZ-SEA
9h 55m1 stop
C$ 401United Airlines
Find Deal
Tue, 9 Dec - Tue, 9 Dec
United Airlines Logo
5:00 a.m. - 3:02 p.m.SEA-YYZ
7h 02m1 stop
United Airlines Logo
5:30 p.m. - 10:43 p.m.YYZ-SEA
8h 13m1 stop
C$ 415United Airlines
Find Deal
Tue, 24 Feb - Tue, 24 Feb

WestJet flights from Seattle to Toronto

Our best WestJet deals on Seattle to Toronto flight tickets
WestJet
4 Dec
SEA3:10 p.m.Seattle/Tacoma Intl
11h 48m
2 stops
YYZ5:58 a.m.Toronto Pearson Intl
11 Dec
YYZ7:45 a.m.Toronto Pearson Intl
9h 35m
1 stop
SEA2:20 p.m.Seattle/Tacoma Intl
C$ 342
Find similar
WestJet
29 Nov
SEA11:55 a.m.Seattle/Tacoma Intl
8h 44m
2 stops
YYZ11:39 p.m.Toronto Pearson Intl
6 Dec
YYZ6:30 p.m.Toronto Pearson Intl
22h 50m
1 stop
SEA2:20 p.m.Seattle/Tacoma Intl
C$ 345
Find similar
WestJet
6 Dec
SEA3:20 p.m.Seattle/Tacoma Intl
11h 53m
1 stop
YYZ6:13 a.m.Toronto Pearson Intl
9 Dec
YYZ7:45 a.m.Toronto Pearson Intl
9h 35m
1 stop
SEA2:20 p.m.Seattle/Tacoma Intl
C$ 347
Find similar

Alaska Airlines flights from Seattle to Toronto

Our best Alaska Airlines deals on Seattle to Toronto flight tickets
Alaska Airlines
9 Dec
SEA7:55 a.m.Seattle/Tacoma Intl
4h 40m
YYZ3:35 p.m.Toronto Pearson Intl
10 Dec
YYZ4:45 p.m.Toronto Pearson Intl
5h 33m
SEA7:18 p.m.Seattle/Tacoma Intl
C$ 352
Find similar
Alaska Airlines
9 Dec
SEA7:55 a.m.Seattle/Tacoma Intl
4h 40m
YYZ3:35 p.m.Toronto Pearson Intl
11 Dec
YYZ4:45 p.m.Toronto Pearson Intl
5h 33m
SEA7:18 p.m.Seattle/Tacoma Intl
C$ 367
Find similar
Alaska Airlines
9 Dec
SEA7:55 a.m.Seattle/Tacoma Intl
4h 40m
YYZ3:35 p.m.Toronto Pearson Intl
14 Dec
YYZ4:45 p.m.Toronto Pearson Intl
5h 33m
SEA7:18 p.m.Seattle/Tacoma Intl
C$ 381
Find similar

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 3 November 2025.
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

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Thu 8/1

6:07 p.m.-6:47 a.m.

1 stop9h 40m

Toronto Pearson Intl

Mon 12/1

7:45 a.m.-2:20 p.m.

1 stop9h 35m

C$ 340

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Thu 4/12

3:10 p.m.-5:58 a.m.

2 stops11h 48m

Toronto Pearson Intl

Thu 11/12

7:45 a.m.-2:20 p.m.

1 stop9h 35m

C$ 342

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Tue 9/12

7:55 a.m.-3:35 p.m.

Nonstop4h 40m

Toronto Pearson Intl

Wed 10/12

7:45 a.m.-2:20 p.m.

1 stop9h 35m

C$ 343

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Sat 29/11

11:55 a.m.-11:39 p.m.

2 stops8h 44m

Toronto Pearson Intl

Sat 6/12

6:30 p.m.-2:20 p.m.

1 stop22h 50m

C$ 345

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Tue 9/12

7:55 a.m.-3:35 p.m.

Nonstop4h 40m

Toronto Pearson Intl

Wed 10/12

4:45 p.m.-7:18 p.m.

Nonstop5h 33m

C$ 352

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Sat 29/11

10:05 a.m.-10:41 p.m.

2 stops9h 36m

Toronto Pearson Intl

Sat 6/12

8:15 a.m.-2:31 p.m.

2 stops9h 16m

C$ 353

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Sat 29/11

10:05 a.m.-10:41 p.m.

2 stops9h 36m

Toronto Pearson Intl

Sat 6/12

7:50 p.m.-10:16 p.m.

Nonstop5h 26m

C$ 354

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Tue 9/12

7:55 a.m.-3:35 p.m.

Nonstop4h 40m

Toronto Pearson Intl

Thu 11/12

4:45 p.m.-7:18 p.m.

Nonstop5h 33m

C$ 367

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Tue 9/12

5:00 a.m.-3:02 p.m.

1 stop7h 02m

Toronto Pearson Intl

Tue 9/12

5:55 p.m.-12:50 a.m.

1 stop9h 55m

C$ 401

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Tue 24/2

5:00 a.m.-3:02 p.m.

1 stop7h 02m

Toronto Pearson Intl

Tue 24/2

5:30 p.m.-10:43 p.m.

1 stop8h 13m

C$ 415

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 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$ 398. The month of February is another great option to travel to Toronto, with average flight prices from Seattle averaging around C$ 401.

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

According to our data, Wednesday is the cheapest day to fly to Toronto from Seattle. The lowest ticket price found for a Wednesday departure recently was C$ 505. 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 Tuesday will generally be more expensive and average around C$ 1,122. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

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

Flying to Toronto from Seattle in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as C$ 500 when looking at flights departing in the afternoon. Try not to purchase tickets in the morning because they tend to be around C$ 950. Of course, these prices can vary depending on the time of year and what airport you fly to.

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 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$ 577 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$ 409 on momondo.

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

There are 3 cabin classes available to choose from on Seattle/Tacoma Intl 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?

You could potentially save up to 13% on your flight if you consider stops on a Seattle to Toronto flight.

How have Seattle to Toronto flight prices changed over time?

As of November 2025, prices for Seattle to Toronto flights are approximately 45% 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$ 186

Fastest flight time

4h 35m

Direct flights

Every day

Airports in Toronto

1 airport
The best one-way flight to Toronto from Seattle in the past 72 hours is C$ 186. The best round-trip flight deal from Seattle to Toronto found on momondo in the last 72 hours is C$ 411.
The fastest flight from Seattle to Toronto takes 4h 35m
Direct flights go from Seattle to Toronto every day.
There is 1 airport near Toronto: Toronto Pearson Intl (YYZ)
Search flight deals

  • 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 35m.

  • 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
WestJetPriceFrom C$ 289Free CancellationRating
7.2
3,153 reviews
Search WestJet flights
Air CanadaPriceFrom C$ 327Free CancellationRating
7.1
10,392 reviews
Search Air Canada flights
Alaska AirlinesPriceFrom C$ 374Free CancellationRating
8.0
11,232 reviews
Search Alaska Airlines flights
United AirlinesPriceFrom C$ 486Free CancellationRating
7.4
8,993 reviews
Search United Airlines flights

  • Alaska Airlines Flights From Seattle to Toronto

    Alaska Airlines is one of the most popular airlines flying from Seattle to Toronto, operating 8 flights/week on average for this route. A good Alaska Airlines flight deal for Seattle to Toronto starts from C$ 374 round-trip, up to an average price of C$ 760. Our users have rated Alaska Airlines at 8.0/10.

  • United Airlines Flights From Seattle to Toronto

    Another popular option for Seattle to Toronto flights is United Airlines (7.4/10, 8,993 ratings). United Airlines flies from Seattle to Toronto around 7 times per week, with deals starting from C$ 486 round-trip and rising to an average price of around C$ 546.

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