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Cheap flights from Seattle to Toronto from C$ 163

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 5/10. 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

Alaska Airlines Logo
7:18 a.m. - 3:00 p.m.SEA-YYZ
4h 42mdirect
Alaska Airlines Logo
4:45 p.m. - 7:08 p.m.YYZ-SEA
5h 23mdirect
C$ 344Alaska Airlines
Find Deal
Sat, 18 Oct - Sat, 25 Oct
WestJet Logo
1:50 p.m. - 12:22 a.m.SEA-YYZ
7h 32m1 stop
WestJet Logo
6:30 a.m. - 8:29 p.m.YYZ-SEA
16h 59m1 stop
C$ 346WestJet
Find Deal
Thu, 2 Oct - Mon, 13 Oct
Logo
1:15 p.m. - 12:31 a.m.SEA-YYZ
8h 16m1 stop
Logo
4:45 p.m. - 7:08 p.m.YYZ-SEA
5h 23mdirect
C$ 348
Find Deal
Fri, 3 Oct - Tue, 21 Oct
WestJet Logo
8:40 a.m. - 6:52 p.m.SEA-YYZ
7h 12m1 stop
WestJet Logo
1:30 p.m. - 7:21 p.m.YYZ-SEA
8h 51m1 stop
C$ 351WestJet
Find Deal
Sat, 11 Oct - Sat, 18 Oct
WestJet Logo
8:40 a.m. - 6:52 p.m.SEA-YYZ
7h 12m1 stop
WestJet Logo
12:00 p.m. - 7:21 p.m.YYZ-SEA
10h 21m2 stops
C$ 352WestJet
Find Deal
Thu, 25 Sep - Sat, 27 Sep
Logo
7:55 a.m. - 3:35 p.m.SEA-YYZ
4h 40mdirect
Logo
7:45 a.m. - 2:20 p.m.YYZ-SEA
9h 35m1 stop
C$ 353
Find Deal
Fri, 12 Dec - Mon, 15 Dec
WestJet Logo
8:40 a.m. - 8:52 p.m.SEA-YYZ
9h 12m1 stop
WestJet Logo
1:30 p.m. - 7:21 p.m.YYZ-SEA
8h 51m1 stop
C$ 355WestJet
Find Deal
Thu, 25 Sep - Sat, 27 Sep
WestJet Logo
8:40 a.m. - 12:12 p.m.SEA-YYZ
24h 32m1 stop
WestJet Logo
6:45 a.m. - 12:35 p.m.YYZ-SEA
8h 50m1 stop
C$ 356WestJet
Find Deal
Thu, 9 Oct - Sun, 12 Oct
Alaska Airlines Logo
7:18 a.m. - 3:00 p.m.SEA-YYZ
4h 42mdirect
Alaska Airlines Logo
4:45 p.m. - 7:05 p.m.YYZ-SEA
5h 20mdirect
C$ 378Alaska Airlines
Find Deal
Mon, 20 Oct - Fri, 31 Oct
Air Canada Logo
10:00 a.m. - 8:30 p.m.SEA-YYZ
7h 30m1 stop
Air Canada Logo
8:40 a.m. - 10:59 a.m.YYZ-SEA
5h 19mdirect
C$ 400Air Canada
Find Deal
Thu, 2 Oct - Wed, 8 Oct

WestJet flights from Seattle to Toronto Pearson Intl Airport

Our best WestJet deals on Seattle to Toronto Pearson Intl Airport flight tickets
WestJet
2 Oct
SEA1:50 p.m.Seattle/Tacoma Intl
7h 32m
1 stop
YYZ12:22 a.m.Toronto Pearson Intl
13 Oct
YYZ6:30 a.m.Toronto Pearson Intl
16h 59m
1 stop
SEA8:29 p.m.Seattle/Tacoma Intl
C$ 346
Find similar
WestJet
11 Oct
SEA8:40 a.m.Seattle/Tacoma Intl
7h 12m
1 stop
YYZ6:52 p.m.Toronto Pearson Intl
18 Oct
YYZ1:30 p.m.Toronto Pearson Intl
8h 51m
1 stop
SEA7:21 p.m.Seattle/Tacoma Intl
C$ 350
Find similar
WestJet
25 Sep
SEA8:40 a.m.Seattle/Tacoma Intl
7h 12m
1 stop
YYZ6:52 p.m.Toronto Pearson Intl
27 Sep
YYZ12:00 p.m.Toronto Pearson Intl
10h 21m
2 stops
SEA7:21 p.m.Seattle/Tacoma Intl
C$ 352
Find similar

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
18 Oct
SEA7:18 a.m.Seattle/Tacoma Intl
4h 42m
YYZ3:00 p.m.Toronto Pearson Intl
25 Oct
YYZ4:45 p.m.Toronto Pearson Intl
5h 23m
SEA7:08 p.m.Seattle/Tacoma Intl
C$ 344
Find similar
Alaska Airlines
20 Oct
SEA7:18 a.m.Seattle/Tacoma Intl
4h 42m
YYZ3:00 p.m.Toronto Pearson Intl
31 Oct
YYZ4:45 p.m.Toronto Pearson Intl
5h 20m
SEA7:05 p.m.Seattle/Tacoma Intl
C$ 378
Find similar
Alaska Airlines
12 Dec
SEA7:55 a.m.Seattle/Tacoma Intl
4h 40m
YYZ3:35 p.m.Toronto Pearson Intl
15 Dec
YYZ4:45 p.m.Toronto Pearson Intl
5h 33m
SEA7:18 p.m.Seattle/Tacoma Intl
C$ 391
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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 11 September 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

Sat 18/10

7:18 a.m.-3:00 p.m.

Nonstop4h 42m

Toronto Pearson Intl

Sat 25/10

4:45 p.m.-7:08 p.m.

Nonstop5h 23m

C$ 344

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Thu 2/10

1:50 p.m.-12:22 a.m.

1 stop7h 32m

Toronto Pearson Intl

Mon 13/10

6:30 a.m.-8:29 p.m.

1 stop16h 59m

C$ 346

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Fri 3/10

1:15 p.m.-12:31 a.m.

1 stop8h 16m

Toronto Pearson Intl

Tue 21/10

4:45 p.m.-7:08 p.m.

Nonstop5h 23m

C$ 348

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Sat 11/10

8:40 a.m.-6:52 p.m.

1 stop7h 12m

Toronto Pearson Intl

Sat 18/10

1:30 p.m.-7:21 p.m.

1 stop8h 51m

C$ 350

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Thu 25/9

8:40 a.m.-6:52 p.m.

1 stop7h 12m

Toronto Pearson Intl

Sat 27/9

12:00 p.m.-7:21 p.m.

2 stops10h 21m

C$ 352

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Fri 12/12

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

Nonstop4h 40m

Toronto Pearson Intl

Mon 15/12

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

1 stop9h 35m

C$ 353

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Thu 25/9

8:40 a.m.-8:52 p.m.

1 stop9h 12m

Toronto Pearson Intl

Sat 27/9

1:30 p.m.-7:21 p.m.

1 stop8h 51m

C$ 355

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Thu 9/10

8:40 a.m.-12:12 p.m.

1 stop24h 32m

Toronto Pearson Intl

Sun 12/10

6:45 a.m.-12:35 p.m.

1 stop8h 50m

C$ 356

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Mon 20/10

7:18 a.m.-3:00 p.m.

Nonstop4h 42m

Toronto Pearson Intl

Fri 31/10

4:45 p.m.-7:05 p.m.

Nonstop5h 20m

C$ 378

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Thu 2/10

10:00 a.m.-8:30 p.m.

1 stop7h 30m

Toronto Pearson Intl

Wed 8/10

8:40 a.m.-10:59 a.m.

Nonstop5h 19m

C$ 400

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 March instead. Flights to Toronto Pearson Intl Airport in March, while not as cheap as those in January, still average around C$ 438.

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$ 499. When flying out on a Tuesday, 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$ 1,168.

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 evening. Our users have found flights to Toronto Pearson Intl Airport in the evening for as low as C$ 191. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are C$ 961 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$ 592 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$ 405 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.

Can stopping save me money on Seattle to Toronto Pearson Intl Airport flights?

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

How have Seattle to Toronto Pearson Intl Airport flight prices changed over time?

As of September 2025, prices for Seattle to Toronto Pearson Intl Airport flights are approximately 52% 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$ 299

Fastest flight time

4h 35m

Direct flights

Every day
The best one-way flight to Toronto Pearson Intl Airport from Seattle in the past 72 hours is C$ 299. The best round-trip flight deal from Seattle to Toronto Pearson Intl Airport found on momondo in the last 72 hours is C$ 724.
The fastest flight from Seattle to Toronto Pearson Intl Airport takes 4h 35m
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
Air CanadaPriceFrom C$ 191Free CancellationRating
7.1
10,000 reviews
Search Air Canada flights
WestJetPriceFrom C$ 324Free CancellationRating
7.2
3,091 reviews
Search WestJet flights
Alaska AirlinesPriceFrom C$ 393Free CancellationRating
8.0
10,000 reviews
Search Alaska Airlines flights
United AirlinesPriceFrom C$ 481Free CancellationRating
7.4
8,937 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$ 560, but momondo users have found Alaska Airlines deals from Seattle to Toronto Pearson Intl Airport from as low as C$ 284 round-trip. Alaska Airlines has been scored 8.0/10 in 10,000 reviews.

  • United Airlines Flights From Seattle to Toronto Pearson Intl Airport

    United Airlines (7.4/10 from 8,937 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$ 390, with deals from around C$ 347 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
Muskoka
Markham
Barrie
Niagara-on-the-Lake
Vaughan
Guelph
Kitchener
Brantford
Burlington
Orillia
Peterborough
Cambridge
St. Catharines
Oakville
Pickering

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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