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Cheap flights from Seattle to Toronto from C$ 231

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 6/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Seattle to Toronto

Cheap round-trip flights

Enter your travel dates to find the best prices.
WestJet Logo
7:35 p.m. - 5:45 a.m.
SEA
-
YYZ
7h 10m
1 stop
WestJet Logo
1:30 p.m. - 6:45 p.m.
YYZ
-
SEA
8h 15m
1 stop
C$ 478WestJet
Fri, 2 Oct - Mon, 5 Oct
WestJet Logo
7:35 p.m. - 5:45 a.m.
SEA
-
YYZ
7h 10m
1 stop
WestJet Logo
12:00 p.m. - 6:45 p.m.
YYZ
-
SEA
9h 45m
1 stop
C$ 480WestJet
Fri, 18 Sep - Wed, 23 Sep
WestJet Logo
7:35 p.m. - 5:45 a.m.
SEA
-
YYZ
7h 10m
1 stop
WestJet Logo
1:30 p.m. - 6:45 p.m.
YYZ
-
SEA
8h 15m
1 stop
C$ 482WestJet
Mon, 5 Oct - Tue, 13 Oct
WestJet Logo
10:30 a.m. - 9:15 p.m.
SEA
-
YYZ
7h 45m
1 stop
WestJet Logo
1:30 p.m. - 6:45 p.m.
YYZ
-
SEA
8h 15m
1 stop
C$ 484WestJet
Tue, 8 Sep - Tue, 15 Sep
WestJet Logo
7:35 p.m. - 5:45 a.m.
SEA
-
YYZ
7h 10m
1 stop
WestJet Logo
1:30 p.m. - 6:45 p.m.
YYZ
-
SEA
8h 15m
1 stop
C$ 488WestJet
Wed, 9 Sep - Fri, 18 Sep
WestJet Logo
7:35 p.m. - 5:45 a.m.
SEA
-
YYZ
7h 10m
1 stop
WestJet Logo
1:30 p.m. - 6:45 p.m.
YYZ
-
SEA
8h 15m
1 stop
C$ 490WestJet
Wed, 14 Oct - Sat, 17 Oct
WestJet Logo
7:35 p.m. - 5:45 a.m.
SEA
-
YYZ
7h 10m
1 stop
WestJet Logo
1:30 p.m. - 6:45 p.m.
YYZ
-
SEA
8h 15m
1 stop
C$ 491WestJet
Wed, 9 Sep - Tue, 29 Sep
Multiple Airlines Logo
6:00 a.m. - 6:00 p.m.
SEA
-
YTZ
9h 00m
1 stop
Multiple Airlines Logo
8:40 p.m. - 8:30 a.m.
YTZ
-
SEA
14h 50m
1 stop
C$ 704Multiple Airlines
Wed, 9 Sep - Fri, 18 Sep
Air Canada Logo
10:45 a.m. - 7:51 a.m.
SEA
-
YTZ
18h 06m
2 stops
Air Canada Logo
12:30 p.m. - 10:42 p.m.
YTZ
-
SEA
13h 12m
2 stops
C$ 762Air Canada
Wed, 15 Jul - Wed, 19 Aug
Air Canada Logo
10:50 a.m. - 1:15 p.m.
SEA
-
YTZ
23h 25m
2 stops
Air Canada Logo
6:50 a.m. - 10:42 p.m.
YTZ
-
SEA
18h 52m
2 stops
C$ 786Air Canada
Mon, 21 Sep - Wed, 23 Sep

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WestJet flights from Seattle to Toronto

Our best WestJet deals on Seattle to Toronto flight tickets
WestJet
2 Oct
SEA7:35 p.m.Seattle/Tacoma Intl
7h 10m
1 stop
YYZ5:45 a.m.Toronto Pearson Intl
5 Oct
YYZ1:30 p.m.Toronto Pearson Intl
8h 15m
1 stop
SEA6:45 p.m.Seattle/Tacoma Intl
C$ 478
WestJet
18 Sep
SEA7:35 p.m.Seattle/Tacoma Intl
7h 10m
1 stop
YYZ5:45 a.m.Toronto Pearson Intl
23 Sep
YYZ12:00 p.m.Toronto Pearson Intl
9h 45m
1 stop
SEA6:45 p.m.Seattle/Tacoma Intl
C$ 480
WestJet
5 Oct
SEA7:35 p.m.Seattle/Tacoma Intl
7h 10m
1 stop
YYZ5:45 a.m.Toronto Pearson Intl
13 Oct
YYZ1:30 p.m.Toronto Pearson Intl
8h 15m
1 stop
SEA6:45 p.m.Seattle/Tacoma Intl
C$ 482

Air Canada flights from Seattle to Toronto

Our best Air Canada deals on Seattle to Toronto flight tickets
Air Canada
10 Jul
SEA7:20 p.m.Seattle/Tacoma Intl
9h 48m
2 stops
YYZ8:08 a.m.Toronto Pearson Intl
11 Aug
YYZ6:15 a.m.Toronto Pearson Intl
11h 07m
2 stops
SEA2:22 p.m.Seattle/Tacoma Intl
C$ 678
Air Canada
8 Jul
SEA7:20 p.m.Seattle/Tacoma Intl
10h 00m
1 stop
YYZ8:20 a.m.Toronto Pearson Intl
14 Jul
YYZ11:00 p.m.Toronto Pearson Intl
14h 07m
1 stop
SEA10:07 a.m.Seattle/Tacoma Intl
C$ 687
Air Canada
6 Jul
SEA5:45 a.m.Seattle/Tacoma Intl
8h 46m
2 stops
YYZ5:31 p.m.Toronto Pearson Intl
15 Jul
YYZ9:20 a.m.Toronto Pearson Intl
12h 12m
2 stops
SEA6:32 p.m.Seattle/Tacoma Intl
C$ 698

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 27 June 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
Quickest round-trip

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Fri 2/10

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

1 stop7h 10m

Toronto Pearson Intl

Mon 5/10

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

1 stop8h 15m

C$ 478

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Fri 18/9

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

1 stop7h 10m

Toronto Pearson Intl

Wed 23/9

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

1 stop9h 45m

C$ 480

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Mon 5/10

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

1 stop7h 10m

Toronto Pearson Intl

Tue 13/10

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

1 stop8h 15m

C$ 482

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Tue 8/9

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

1 stop7h 45m

Toronto Pearson Intl

Tue 15/9

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

1 stop8h 15m

C$ 484

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Wed 9/9

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

1 stop7h 10m

Toronto Pearson Intl

Fri 18/9

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

1 stop8h 15m

C$ 488

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Wed 14/10

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

1 stop7h 10m

Toronto Pearson Intl

Sat 17/10

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

1 stop8h 15m

C$ 490

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Wed 9/9

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

1 stop7h 10m

Toronto Pearson Intl

Tue 29/9

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

1 stop8h 15m

C$ 491

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Wed 9/9

6:00 a.m.-6:00 p.m.

1 stop9h 00m

Toronto Island

Fri 18/9

8:40 p.m.-8:30 a.m.

1 stop14h 50m

C$ 704

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Wed 15/7

10:45 a.m.-7:51 a.m.

2 stops18h 06m

Toronto Island

Wed 19/8

12:30 p.m.-10:42 p.m.

2 stops13h 12m

C$ 762

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Mon 21/9

10:50 a.m.-1:15 p.m.

2 stops23h 25m

Toronto Island

Wed 23/9

6:50 a.m.-10:42 p.m.

2 stops18h 52m

C$ 786

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$ 125. The month of March is another great option to travel to Toronto, with average flight prices from Seattle averaging around C$ 132.

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$ 552. 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$ 1,113. 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$ 557 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$ 413 on momondo.

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

There are 3 cabin classes available to choose from on Seattle 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 16% 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 June 2026, 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$ 448

Fastest flight time

4h 39m

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$ 448. The best round-trip flight deal from Seattle to Toronto found on momondo in the last 72 hours is C$ 766.
The fastest flight from Seattle to Toronto takes 4h 39m
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 39m.

  • 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$ 293Free CancellationRating
7.2
3,384 reviews
Search WestJet flights
Alaska AirlinesPriceFrom C$ 314Free CancellationRating
7.9
12,582 reviews
Search Alaska Airlines flights
Air CanadaPriceFrom C$ 374Free CancellationRating
7.1
11,267 reviews
Search Air Canada flights

  • Alaska Airlines Flights From Seattle to Toronto

    Alaska Airlines is one of the most popular airlines flying from Seattle to Toronto, operating 6 flights/week on average for this route. A good Alaska Airlines flight deal for Seattle to Toronto starts from C$ 314 round-trip, up to an average price of C$ 805. 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, 11,267 ratings). Air Canada flies from Seattle to Toronto around 7 times per week, with deals starting from C$ 374 round-trip and rising to an average price of around C$ 469.

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