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Cheap flights from Seattle to Toronto from C$ 142

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 22/2. 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
11:55 a.m. - 11:38 p.m.
SEA
-
YYZ
8h 43m2 stops
Multiple Airlines Logo
4:45 p.m. - 7:18 p.m.
YYZ
-
SEA
5h 33mdirect
C$ 338Multiple Airlines
Fri, 27 Feb - Fri, 6 Mar
WestJet Logo
7:05 a.m. - 6:52 p.m.
SEA
-
YYZ
8h 47m1 stop
WestJet Logo
6:30 a.m. - 1:08 p.m.
YYZ
-
SEA
9h 38m1 stop
C$ 339WestJet
Mon, 25 May - Fri, 29 May
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$ 340Alaska Airlines
Sun, 22 Feb - Mon, 2 Mar
WestJet Logo
3:10 p.m. - 5:58 a.m.
SEA
-
YYZ
11h 48m2 stops
WestJet Logo
6:45 a.m. - 1:08 p.m.
YYZ
-
SEA
9h 23m2 stops
C$ 342WestJet
Fri, 24 Apr - Mon, 27 Apr
WestJet Logo
3:35 p.m. - 5:50 a.m.
SEA
-
YYZ
11h 15m2 stops
WestJet Logo
12:00 p.m. - 8:28 p.m.
YYZ
-
SEA
11h 28m2 stops
C$ 343WestJet
Sun, 26 Apr - Fri, 1 May
WestJet Logo
7:05 a.m. - 5:22 p.m.
SEA
-
YYZ
7h 17m1 stop
WestJet Logo
12:00 p.m. - 8:28 p.m.
YYZ
-
SEA
11h 28m2 stops
C$ 346WestJet
Mon, 25 May - Fri, 29 May
Air Canada Logo
8:10 a.m. - 3:53 p.m.
SEA
-
YYZ
4h 43mdirect
Air Canada Logo
7:50 p.m. - 10:16 p.m.
YYZ
-
SEA
5h 26mdirect
C$ 347Air Canada
Wed, 18 Feb - Wed, 18 Feb
WestJet Logo
11:55 a.m. - 6:58 a.m.
SEA
-
YYZ
16h 03m1 stop
WestJet Logo
1:30 p.m. - 8:28 p.m.
YYZ
-
SEA
9h 58m1 stop
C$ 349WestJet
Fri, 24 Apr - Tue, 28 Apr
WestJet Logo
3:10 p.m. - 7:36 p.m.
SEA
-
YYZ
25h 26m1 stop
WestJet Logo
7:45 a.m. - 2:20 p.m.
YYZ
-
SEA
9h 35m1 stop
C$ 350WestJet
Tue, 13 Jan - Thu, 15 Jan
Air Canada Logo
8:00 p.m. - 9:42 a.m.
SEA
-
YTZ
10h 42m2 stops
Air Canada Logo
8:30 p.m. - 2:31 p.m.
YTZ
-
SEA
21h 01m2 stops
C$ 397Air Canada
Fri, 30 Jan - Fri, 6 Feb

WestJet flights from Seattle to Toronto

Our best WestJet deals on Seattle to Toronto flight tickets
WestJet
25 May
SEA7:05 a.m.Seattle/Tacoma Intl
8h 47m
1 stop
YYZ6:52 p.m.Toronto Pearson Intl
29 May
YYZ6:30 a.m.Toronto Pearson Intl
9h 38m
1 stop
SEA1:08 p.m.Seattle/Tacoma Intl
C$ 339
Find similar
WestJet
24 Apr
SEA3:10 p.m.Seattle/Tacoma Intl
11h 48m
2 stops
YYZ5:58 a.m.Toronto Pearson Intl
29 Apr
YYZ12:00 p.m.Toronto Pearson Intl
11h 28m
2 stops
SEA8:28 p.m.Seattle/Tacoma Intl
C$ 342
Find similar
WestJet
26 Apr
SEA3:35 p.m.Seattle/Tacoma Intl
11h 15m
2 stops
YYZ5:50 a.m.Toronto Pearson Intl
1 May
YYZ12:00 p.m.Toronto Pearson Intl
11h 28m
2 stops
SEA8:28 p.m.Seattle/Tacoma Intl
C$ 343
Find similar

Alaska Airlines flights from Seattle to Toronto

Our best Alaska Airlines deals on Seattle to Toronto flight tickets
Alaska Airlines
22 Feb
SEA7:55 a.m.Seattle/Tacoma Intl
4h 40m
YYZ3:35 p.m.Toronto Pearson Intl
1 Mar
YYZ4:45 p.m.Toronto Pearson Intl
5h 33m
SEA7:18 p.m.Seattle/Tacoma Intl
C$ 340
Find similar
Alaska Airlines
25 Apr
SEA7:55 a.m.Seattle/Tacoma Intl
4h 40m
YYZ3:35 p.m.Toronto Pearson Intl
29 Apr
YYZ4:45 p.m.Toronto Pearson Intl
5h 20m
SEA7:05 p.m.Seattle/Tacoma Intl
C$ 408
Find similar
Alaska Airlines
30 Dec
SEA8:00 a.m.Seattle/Tacoma Intl
4h 35m
YYZ3:35 p.m.Toronto Pearson Intl
9 Jan
YYZ4:45 p.m.Toronto Pearson Intl
5h 32m
SEA7:17 p.m.Seattle/Tacoma Intl
C$ 818
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 18 December 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

Fri 27/2

11:55 a.m.-11:38 p.m.

2 stops8h 43m

Toronto Pearson Intl

Fri 6/3

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

Nonstop5h 33m

C$ 338

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Mon 25/5

7:05 a.m.-6:52 p.m.

1 stop8h 47m

Toronto Pearson Intl

Fri 29/5

6:30 a.m.-1:08 p.m.

1 stop9h 38m

C$ 339

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Sun 22/2

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

Nonstop4h 40m

Toronto Pearson Intl

Mon 2/3

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

Nonstop5h 33m

C$ 340

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Fri 24/4

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

2 stops11h 48m

Toronto Pearson Intl

Mon 27/4

6:45 a.m.-1:08 p.m.

2 stops9h 23m

C$ 342

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Sun 26/4

3:35 p.m.-5:50 a.m.

2 stops11h 15m

Toronto Pearson Intl

Fri 1/5

12:00 p.m.-8:28 p.m.

2 stops11h 28m

C$ 343

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Mon 25/5

7:05 a.m.-5:22 p.m.

1 stop7h 17m

Toronto Pearson Intl

Fri 29/5

12:00 p.m.-8:28 p.m.

2 stops11h 28m

C$ 346

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Wed 18/2

8:10 a.m.-3:53 p.m.

Nonstop4h 43m

Toronto Pearson Intl

Wed 18/2

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

Nonstop5h 26m

C$ 347

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Fri 24/4

11:55 a.m.-6:58 a.m.

1 stop16h 03m

Toronto Pearson Intl

Tue 28/4

1:30 p.m.-8:28 p.m.

1 stop9h 58m

C$ 349

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Tue 13/1

3:10 p.m.-7:36 p.m.

1 stop25h 26m

Toronto Pearson Intl

Thu 15/1

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

1 stop9h 35m

C$ 350

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Fri 30/1

8:00 p.m.-9:42 a.m.

2 stops10h 42m

Toronto Island

Fri 6/2

8:30 p.m.-2:31 p.m.

2 stops21h 01m

C$ 397

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$ 378. The month of January is another great option to travel to Toronto, with average flight prices from Seattle averaging around C$ 390.

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$ 535. 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$ 971. 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$ 492 when looking at flights departing in the afternoon. Try not to purchase tickets in the morning because they tend to be around C$ 814. 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$ 569 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$ 402 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.

How have Seattle to Toronto flight prices changed over time?

As of December 2025, prices for Seattle to Toronto flights are approximately 46% 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$ 241

Fastest flight time

4h 35m

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$ 241. The best round-trip flight deal from Seattle to Toronto found on momondo in the last 72 hours is C$ 365.
The fastest flight from Seattle to Toronto takes 4h 35m
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

  • 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$ 284Free CancellationRating
7.2
3,203 reviews
Search WestJet flights
Air CanadaPriceFrom C$ 364Free CancellationRating
7.1
10,534 reviews
Search Air Canada flights
Alaska AirlinesPriceFrom C$ 375Free CancellationRating
8.0
11,478 reviews
Search Alaska Airlines flights
United AirlinesPriceFrom C$ 486Free CancellationRating
7.4
9,092 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 2 flights/week on average for this route. A good Alaska Airlines flight deal for Seattle to Toronto starts from C$ 375 round-trip, up to an average price of C$ 782. 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, 9,091 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$ 538.

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