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Cheap flights from Seattle to Toronto from C$ 146

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 14/3. 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
3:10 p.m. - 5:58 a.m.
SEA
-
YYZ
11h 48m2 stops
WestJet Logo
10:15 p.m. - 10:22 a.m.
YYZ
-
SEA
15h 07m2 stops
C$ 346WestJet
Thu, 8 Jan - Sat, 10 Jan
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
Tue, 6 Jan - Tue, 13 Jan
Multiple Airlines Logo
3:10 p.m. - 5:58 a.m.
SEA
-
YYZ
11h 48m2 stops
Multiple Airlines Logo
8:00 a.m. - 7:16 p.m.
YYZ
-
SEA
14h 16m2 stops
C$ 348Multiple Airlines
Sun, 11 Jan - Sun, 18 Jan
Alaska Airlines Logo
7:55 a.m. - 3:35 p.m.
SEA
-
YYZ
4h 40mdirect
Alaska Airlines Logo
4:45 p.m. - 7:17 p.m.
YYZ
-
SEA
5h 32mdirect
C$ 350Alaska Airlines
Fri, 30 Jan - Sun, 1 Feb
Multiple Airlines Logo
7:55 a.m. - 3:35 p.m.
SEA
-
YYZ
4h 40mdirect
Multiple Airlines Logo
10:15 p.m. - 10:22 a.m.
YYZ
-
SEA
15h 07m2 stops
C$ 351Multiple Airlines
Thu, 8 Jan - Sat, 10 Jan
WestJet Logo
11:55 a.m. - 6:58 a.m.
SEA
-
YYZ
16h 03m1 stop
WestJet Logo
8:45 p.m. - 10:22 a.m.
YYZ
-
SEA
16h 37m1 stop
C$ 353WestJet
Fri, 23 Jan - Thu, 29 Jan
Air Canada Logo
8:10 a.m. - 3:53 p.m.
SEA
-
YYZ
4h 43mdirect
Air Canada Logo
8:00 a.m. - 2:31 p.m.
YYZ
-
SEA
9h 31m1 stop
C$ 354Air Canada
Wed, 7 Jan - Wed, 14 Jan
Multiple Airlines Logo
3:10 p.m. - 6:13 a.m.
SEA
-
YYZ
12h 03m1 stop
Multiple Airlines Logo
4:45 p.m. - 7:17 p.m.
YYZ
-
SEA
5h 32mdirect
C$ 355Multiple Airlines
Sun, 11 Jan - Wed, 14 Jan
Multiple Airlines Logo
7:55 a.m. - 3:35 p.m.
SEA
-
YYZ
4h 40mdirect
Multiple Airlines Logo
6:30 a.m. - 2:20 p.m.
YYZ
-
SEA
10h 50m1 stop
C$ 357Multiple Airlines
Wed, 7 Jan - Thu, 8 Jan
WestJet Logo
3:10 p.m. - 5:58 a.m.
SEA
-
YYZ
11h 48m2 stops
WestJet Logo
10:15 p.m. - 2:19 p.m.
YYZ
-
SEA
19h 04m2 stops
C$ 358WestJet
Thu, 5 Mar - Mon, 9 Mar

Alaska Airlines flights from Seattle to Toronto Pearson Intl Airport

Our best Alaska Airlines deals on Seattle to Toronto Pearson Intl Airport flight tickets
Alaska Airlines
30 Jan
SEA7:55 a.m.Seattle/Tacoma Intl
4h 40m
YYZ3:35 p.m.Toronto Pearson Intl
1 Feb
YYZ4:45 p.m.Toronto Pearson Intl
5h 32m
SEA7:17 p.m.Seattle/Tacoma Intl
C$ 350
Find similar
Alaska Airlines
27 Dec
SEA8:00 a.m.Seattle/Tacoma Intl
4h 35m
YYZ3:35 p.m.Toronto Pearson Intl
6 Jan
YYZ4:45 p.m.Toronto Pearson Intl
5h 26m
SEA7:11 p.m.Seattle/Tacoma Intl
C$ 852
Find similar
Alaska Airlines
27 Dec
SEA8:00 a.m.Seattle/Tacoma Intl
4h 35m
YYZ3:35 p.m.Toronto Pearson Intl
6 Jan
YYZ11:30 a.m.Toronto Pearson Intl
9h 46m
1 stop
SEA6:16 p.m.Seattle/Tacoma Intl
C$ 902
Find similar

WestJet flights from Seattle to Toronto Pearson Intl Airport

Our best WestJet deals on Seattle to Toronto Pearson Intl Airport flight tickets
WestJet
8 Jan
SEA3:10 p.m.Seattle/Tacoma Intl
11h 48m
2 stops
YYZ5:58 a.m.Toronto Pearson Intl
10 Jan
YYZ10:15 p.m.Toronto Pearson Intl
15h 07m
2 stops
SEA10:22 a.m.Seattle/Tacoma Intl
C$ 346
Find similar
WestJet
23 Jan
SEA11:55 a.m.Seattle/Tacoma Intl
16h 03m
1 stop
YYZ6:58 a.m.Toronto Pearson Intl
29 Jan
YYZ8:45 p.m.Toronto Pearson Intl
16h 37m
1 stop
SEA10:22 a.m.Seattle/Tacoma Intl
C$ 352
Find similar
WestJet
5 Mar
SEA3:10 p.m.Seattle/Tacoma Intl
11h 48m
2 stops
YYZ5:58 a.m.Toronto Pearson Intl
9 Mar
YYZ10:15 p.m.Toronto Pearson Intl
19h 04m
2 stops
SEA2:19 p.m.Seattle/Tacoma Intl
C$ 358
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Toronto Pearson Intl Airport 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 15 December 2025.
Use the filters below to find and compare flights from Seattle to Toronto Pearson Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Thu 8/1

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

2 stops11h 48m

Toronto Pearson Intl

Sat 10/1

10:15 p.m.-10:22 a.m.

2 stops15h 07m

C$ 346

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Tue 6/1

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

Nonstop4h 43m

Toronto Pearson Intl

Tue 13/1

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

Nonstop5h 26m

C$ 347

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Sun 11/1

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

2 stops11h 48m

Toronto Pearson Intl

Sun 18/1

8:00 a.m.-7:16 p.m.

2 stops14h 16m

C$ 348

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Fri 30/1

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

Nonstop4h 40m

Toronto Pearson Intl

Sun 1/2

4:45 p.m.-7:17 p.m.

Nonstop5h 32m

C$ 350

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Thu 8/1

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

Nonstop4h 40m

Toronto Pearson Intl

Sat 10/1

10:15 p.m.-10:22 a.m.

2 stops15h 07m

C$ 351

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Fri 23/1

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

1 stop16h 03m

Toronto Pearson Intl

Thu 29/1

8:45 p.m.-10:22 a.m.

1 stop16h 37m

C$ 352

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Wed 7/1

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

Nonstop4h 43m

Toronto Pearson Intl

Wed 14/1

8:00 a.m.-2:31 p.m.

1 stop9h 31m

C$ 354

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Sun 11/1

3:10 p.m.-6:13 a.m.

1 stop12h 03m

Toronto Pearson Intl

Wed 14/1

4:45 p.m.-7:17 p.m.

Nonstop5h 32m

C$ 355

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Wed 7/1

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

Nonstop4h 40m

Toronto Pearson Intl

Thu 8/1

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

1 stop10h 50m

C$ 357

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Thu 5/3

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

2 stops11h 48m

Toronto Pearson Intl

Mon 9/3

10:15 p.m.-2:19 p.m.

2 stops19h 04m

C$ 358

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 Pearson Intl Airport

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 Pearson Intl Airport?

If you aren’t able to travel during the month of January, then book flights to Toronto Pearson Intl Airport from Seattle during October instead. Flights to Toronto Pearson Intl Airport in October, while not as cheap as those in January, still average around C$ 456.

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

Our data shows that Wednesday is the least expensive day to fly to Toronto Pearson Intl Airport. Tickets to fly out on this day can be as low as C$ 534. When flying out on a Monday, the most expensive travel day of the week, you can expect to see flight prices from Seattle to Toronto Pearson Intl Airport for around C$ 970.

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

Our data shows that the cheapest Seattle to Toronto Pearson Intl Airport flights are usually those with departure times in the afternoon. Our users have found flights to Toronto Pearson Intl Airport in the afternoon for as low as C$ 476. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are C$ 814 on average. Flights to Toronto Pearson Intl Airport from Seattle in the morning are generally more expensive because this time of day is more convenient for travellers’ schedules.

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

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

How far in advance should I book a flight to Toronto Pearson Intl Airport?

You are more likely to see cheaper flights to Toronto Pearson Intl Airport from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Toronto Pearson Intl Airport 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 Pearson Intl Airport from Seattle for as low as C$ 402 on momondo.

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

There are 3 cabin classes available to choose from on Seattle/Tacoma Intl to Toronto Pearson Intl 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 Pearson Intl Airport flight prices changed over time?

As of December 2025, prices for Seattle to Toronto Pearson Intl Airport flights are approximately 42% cheaper when compared to flights at the same time last year.

When to book flights from Seattle to Toronto Pearson Intl Airport

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

Cheap Seattle to Toronto Pearson Intl Airport (SEA to YYZ) flight deals and tips

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

Best price found

C$ 241

Fastest flight time

4h 40m

Direct flights

Every day
The best one-way flight to Toronto Pearson Intl Airport from Seattle in the past 72 hours is C$ 241. The best round-trip flight deal from Seattle to Toronto Pearson Intl Airport found on momondo in the last 72 hours is C$ 364.
The fastest flight from Seattle to Toronto Pearson Intl Airport takes 4h 40m
Direct flights go from Seattle to Toronto Pearson Intl Airport every day.
Search flight deals

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

    The distance between Seattle/Tacoma Intl and Toronto Pearson Intl is about 3304.6 km. 4h 40m is a normal flight duration for this route.

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

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

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

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

    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 Pearson Intl Airport.

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

    The travel and health documents required for your trip to Toronto Pearson Intl Airport 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 Pearson Intl Airport. 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 Pearson Intl Airport?

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

Best airlines flying from Seattle to Toronto Pearson Intl Airport

Compare and see reviews for airlines that fly from Seattle to Toronto Pearson Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
WestJetPriceFrom C$ 284Free CancellationRating
7.2
3,202 reviews
Search WestJet flights
Air CanadaPriceFrom C$ 363Free CancellationRating
7.1
10,527 reviews
Search Air Canada flights
Alaska AirlinesPriceFrom C$ 375Free CancellationRating
8.0
11,458 reviews
Search Alaska Airlines flights
United AirlinesPriceFrom C$ 486Free CancellationRating
7.4
9,093 reviews
Search United Airlines flights

  • Alaska Airlines Flights From Seattle to Toronto Pearson Intl Airport

    Alaska Airlines operates around 4 flights from Seattle to Toronto Pearson Intl Airport every week. The average price of these flights found in the last 72 hours has been C$ 781, but momondo users have found Alaska Airlines deals from Seattle to Toronto Pearson Intl Airport from as low as C$ 375 round-trip. Alaska Airlines has been scored 8.0/10 in 11,452 reviews.

  • United Airlines Flights From Seattle to Toronto Pearson Intl Airport

    United Airlines (7.4/10 from 9,092 reviews) operates around 7 flights from Seattle to Toronto Pearson Intl Airport in any given week. The average United Airlines airfare for this route is around C$ 537, with deals from around C$ 486 rare but found on momondo. Referenced prices are for round-trip Seattle to Toronto Pearson Intl Airport flight searches in the last 72 hours.

Travelling to a place near Toronto?

Book flights to Toronto if you plan to visit one of these locations
Niagara Falls
Mississauga
Brampton
Collingwood
Oshawa
Guelph
Muskoka
Barrie
Markham
Niagara-on-the-Lake
Vaughan
Kitchener
Burlington
Orillia
Brantford
Cambridge
Peterborough
Pickering
Oakville
Gravenhurst

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Seattle to Toronto. momondo saves you time and could save you money on your trip.

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

Flights from Seattle to Toronto with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

Once all potential Seattle to Toronto flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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.

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