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Cheap flights from Seattle to Toronto from C$ 175

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 22/6. 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

Enter your travel dates to find the best prices.
WestJet Logo
10:30 a.m. - 10:45 p.m.
SEA
-
YYZ
9h 15m
1 stop
WestJet Logo
12:00 p.m. - 6:45 p.m.
YYZ
-
SEA
9h 45m
2 stops
C$ 373WestJet
Wed, 24 Jun - Mon, 29 Jun
WestJet Logo
10:30 a.m. - 11:59 p.m.
SEA
-
YYZ
10h 29m
2 stops
WestJet Logo
3:50 p.m. - 9:00 p.m.
YYZ
-
SEA
8h 10m
1 stop
C$ 376WestJet
Tue, 9 Jun - Tue, 16 Jun
WestJet Logo
10:30 a.m. - 9:15 p.m.
SEA
-
YYZ
7h 45m
1 stop
WestJet Logo
6:10 a.m. - 6:45 p.m.
YYZ
-
SEA
15h 35m
2 stops
C$ 377WestJet
Sat, 1 Aug - Sun, 9 Aug
WestJet Logo
7:35 p.m. - 5:45 a.m.
SEA
-
YYZ
7h 10m
1 stop
WestJet Logo
3:50 p.m. - 9:00 p.m.
YYZ
-
SEA
8h 10m
1 stop
C$ 379WestJet
Thu, 4 Jun - Tue, 16 Jun
WestJet Logo
10:30 a.m. - 11:59 p.m.
SEA
-
YYZ
10h 29m
2 stops
WestJet Logo
1:30 p.m. - 6:45 p.m.
YYZ
-
SEA
8h 15m
1 stop
C$ 380WestJet
Thu, 3 Sep - Wed, 9 Sep
Air Canada Logo
5:45 a.m. - 6:22 p.m.
SEA
-
YTZ
9h 37m
2 stops
Air Canada Logo
8:55 p.m. - 10:05 a.m.
YTZ
-
SEA
16h 10m
2 stops
C$ 464Air Canada
Sat, 6 Jun - Fri, 12 Jun
Air Canada Logo
7:20 p.m. - 10:57 a.m.
SEA
-
YTZ
12h 37m
2 stops
Air Canada Logo
12:15 p.m. - 7:05 p.m.
YTZ
-
SEA
9h 50m
1 stop
C$ 494Air Canada
Sat, 6 Jun - Fri, 12 Jun
United Airlines Logo
10:40 p.m. - 10:06 a.m.
SEA
-
YTZ
8h 26m
1 stop
United Airlines Logo
12:15 p.m. - 7:05 p.m.
YTZ
-
SEA
9h 50m
1 stop
C$ 652United Airlines
Fri, 5 Jun - Tue, 9 Jun
Multiple Airlines Logo
7:35 p.m. - 4:33 p.m.
SEA
-
YTZ
17h 58m
2 stops
Multiple Airlines Logo
11:55 a.m. - 9:00 p.m.
YTZ
-
SEA
12h 05m
2 stops
C$ 684Multiple Airlines
Fri, 5 Jun - Mon, 15 Jun
United Airlines Logo
10:40 p.m. - 10:06 a.m.
SEA
-
YTZ
8h 26m
1 stop
United Airlines Logo
2:55 p.m. - 8:46 p.m.
YTZ
-
SEA
8h 51m
1 stop
C$ 700United Airlines
Fri, 5 Jun - Tue, 9 Jun

WestJet flights from Seattle to Toronto

Our best WestJet deals on Seattle to Toronto flight tickets
WestJet
24 Jun
SEA10:30 a.m.Seattle/Tacoma Intl
9h 15m
1 stop
YYZ10:45 p.m.Toronto Pearson Intl
29 Jun
YYZ12:00 p.m.Toronto Pearson Intl
9h 45m
2 stops
SEA6:45 p.m.Seattle/Tacoma Intl
C$ 373
WestJet
9 Jun
SEA10:30 a.m.Seattle/Tacoma Intl
10h 29m
2 stops
YYZ11:59 p.m.Toronto Pearson Intl
16 Jun
YYZ3:50 p.m.Toronto Pearson Intl
8h 10m
1 stop
SEA9:00 p.m.Seattle/Tacoma Intl
C$ 376
WestJet
1 Aug
SEA10:30 a.m.Seattle/Tacoma Intl
7h 45m
1 stop
YYZ9:15 p.m.Toronto Pearson Intl
9 Aug
YYZ6:10 a.m.Toronto Pearson Intl
15h 35m
2 stops
SEA6:45 p.m.Seattle/Tacoma Intl
C$ 377

United Airlines flights from Seattle to Toronto

Our best United Airlines deals on Seattle to Toronto flight tickets
United Airlines
5 Jun
SEA10:40 p.m.Seattle/Tacoma Intl
8h 26m
1 stop
YTZ10:06 a.m.Toronto Island
9 Jun
YTZ12:15 p.m.Toronto Island
9h 50m
1 stop
SEA7:05 p.m.Seattle/Tacoma Intl
C$ 652
United Airlines
23 May
SEA1:51 p.m.Seattle/Tacoma Intl
17h 03m
1 stop
YYZ9:54 a.m.Toronto Pearson Intl
28 May
YYZ5:16 p.m.Toronto Pearson Intl
9h 16m
1 stop
SEA11:32 p.m.Seattle/Tacoma Intl
C$ 665
United Airlines
5 Jun
SEA10:40 p.m.Seattle/Tacoma Intl
8h 26m
1 stop
YTZ10:06 a.m.Toronto Island
9 Jun
YTZ2:55 p.m.Toronto Island
8h 51m
1 stop
SEA8:46 p.m.Seattle/Tacoma Intl
C$ 700

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 11 May 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 - YYZ

SEAYYZ

Seattle/Tacoma Intl

Wed 24/6

10:30 a.m.-10:45 p.m.

1 stop9h 15m

Toronto Pearson Intl

Mon 29/6

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

2 stops9h 45m

C$ 373

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Tue 9/6

10:30 a.m.-11:59 p.m.

2 stops10h 29m

Toronto Pearson Intl

Tue 16/6

3:50 p.m.-9:00 p.m.

1 stop8h 10m

C$ 376

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Sat 1/8

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

1 stop7h 45m

Toronto Pearson Intl

Sun 9/8

6:10 a.m.-6:45 p.m.

2 stops15h 35m

C$ 377
Quickest round-trip

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Thu 4/6

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

1 stop7h 10m

Toronto Pearson Intl

Tue 16/6

3:50 p.m.-9:00 p.m.

1 stop8h 10m

C$ 379

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Thu 3/9

10:30 a.m.-11:59 p.m.

2 stops10h 29m

Toronto Pearson Intl

Wed 9/9

1:30 p.m.-6:45 p.m.

1 stop8h 15m

C$ 380

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Sat 6/6

5:45 a.m.-6:22 p.m.

2 stops9h 37m

Toronto Island

Fri 12/6

8:55 p.m.-10:05 a.m.

2 stops16h 10m

C$ 464

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Sat 6/6

7:20 p.m.-10:57 a.m.

2 stops12h 37m

Toronto Island

Fri 12/6

12:15 p.m.-7:05 p.m.

1 stop9h 50m

C$ 494

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Fri 5/6

10:40 p.m.-10:06 a.m.

1 stop8h 26m

Toronto Island

Tue 9/6

12:15 p.m.-7:05 p.m.

1 stop9h 50m

C$ 652

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Fri 5/6

7:35 p.m.-4:33 p.m.

2 stops17h 58m

Toronto Island

Mon 15/6

11:55 a.m.-9:00 p.m.

2 stops12h 05m

C$ 684

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Fri 5/6

10:40 p.m.-10:06 a.m.

1 stop8h 26m

Toronto Island

Tue 9/6

2:55 p.m.-8:46 p.m.

1 stop8h 51m

C$ 700

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?

What is the cheapest month to fly to Toronto?

The month of November is, on average, the cheapest month to fly to Toronto from Seattle, with most prices found around C$ 120. The month of March is another great option to travel to Toronto, with average flight prices from Seattle averaging around C$ 127.

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$ 532. 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$ 964. 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$ 531 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$ 425 on momondo.

Can stopping save me money on Seattle to Toronto flights?

You could potentially save up to 17% 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 May 2026, prices for Seattle to Toronto flights are approximately 43% 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$ 292

Fastest flight time

4h 45m

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$ 292. The best round-trip flight deal from Seattle to Toronto found on momondo in the last 72 hours is C$ 452.
The fastest flight from Seattle to Toronto takes 4h 45m
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 45m.

  • 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$ 256Free CancellationRating
7.1
11,017 reviews
Search Air Canada flights
WestJetPriceFrom C$ 282Free CancellationRating
7.2
3,332 reviews
Search WestJet flights
Alaska AirlinesPriceFrom C$ 302Free CancellationRating
7.9
12,356 reviews
Search Alaska Airlines flights

  • Alaska Airlines Flights From Seattle to Toronto

    Alaska Airlines is one of the most popular airlines flying from Seattle to Toronto, operating 4 flights/week on average for this route. A good Alaska Airlines flight deal for Seattle to Toronto starts from C$ 302 round-trip, up to an average price of C$ 697. 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, 11,017 ratings). Air Canada flies from Seattle to Toronto around 7 times per week, with deals starting from C$ 256 round-trip and rising to an average price of around C$ 452.

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