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Cheap flights from Seattle to Toronto from C$ 153

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 7/10. 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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Find the cheapest flights from Seattle to Toronto (SEA-YTO)

Cheap round-trip flights

WestJet Logo
1:50 p.m. - 12:40 a.m.SEA-YHM
7h 50m1 stop
WestJet Logo
6:00 a.m. - 12:59 p.m.YHM-SEA
9h 59m1 stop
C$ 348WestJet
Find Deal
ven., 17 oct. - lun., 20 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$ 354
Find Deal
ven., 10 oct. - ven., 17 oct.
WestJet Logo
1:50 p.m. - 12:22 a.m.SEA-YYZ
7h 32m1 stop
WestJet Logo
8:00 a.m. - 12:59 p.m.YYZ-SEA
7h 59m1 stop
C$ 355WestJet
Find Deal
sam., 4 oct. - mer., 15 oct.
WestJet Logo
1:50 p.m. - 12:45 a.m.SEA-YKF
7h 55m1 stop
WestJet Logo
6:00 a.m. - 12:59 p.m.YKF-SEA
9h 59m1 stop
C$ 355WestJet
Find Deal
ven., 17 oct. - jeu., 23 oct.
WestJet Logo
1:50 p.m. - 12:22 a.m.SEA-YYZ
7h 32m1 stop
WestJet Logo
1:30 p.m. - 7:14 p.m.YYZ-SEA
8h 44m1 stop
C$ 357WestJet
Find Deal
sam., 4 oct. - mar., 7 oct.
WestJet Logo
1:50 p.m. - 12:22 a.m.SEA-YYZ
7h 32m1 stop
WestJet Logo
8:00 a.m. - 12:59 p.m.YYZ-SEA
7h 59m1 stop
C$ 358WestJet
Find Deal
ven., 17 oct. - lun., 20 oct.
WestJet Logo
8:40 a.m. - 12:31 a.m.SEA-YYZ
12h 51m2 stops
WestJet Logo
6:45 a.m. - 12:33 p.m.YYZ-SEA
8h 48m1 stop
C$ 359WestJet
Find Deal
jeu., 2 oct. - dim., 12 oct.
Air Canada Logo
2:55 p.m. - 6:31 a.m.SEA-YYZ
12h 36m2 stops
Air Canada Logo
10:35 a.m. - 6:36 p.m.YYZ-SEA
11h 01m2 stops
C$ 375Air Canada
Find Deal
ven., 10 oct. - ven., 17 oct.
Air Canada Logo
7:15 a.m. - 7:49 p.m.SEA-YTZ
9h 34m1 stop
Air Canada Logo
4:10 p.m. - 10:26 p.m.YTZ-SEA
9h 16m2 stops
C$ 379Air Canada
Find Deal
ven., 10 oct. - ven., 17 oct.
Alaska Airlines Logo
7:16 a.m. - 3:00 p.m.SEA-YYZ
4h 44mdirect
Alaska Airlines Logo
4:45 p.m. - 7:08 p.m.YYZ-SEA
5h 23mdirect
C$ 406Alaska Airlines
Find Deal
mer., 24 sept. - mer., 1 oct.

Air Canada flights from Seattle to Toronto

Our best Air Canada deals on Seattle to Toronto flight tickets
Air Canada
10 Oct
SEA2:55 p.m.Seattle/Tacoma Intl
12h 36m
2 stops
YYZ6:31 a.m.Toronto Pearson Intl
17 Oct
YYZ10:35 a.m.Toronto Pearson Intl
11h 01m
2 stops
SEA6:36 p.m.Seattle/Tacoma Intl
C$ 375
Find similar
Air Canada
10 Oct
SEA7:15 a.m.Seattle/Tacoma Intl
9h 34m
1 stop
YTZ7:49 p.m.Toronto Island
17 Oct
YTZ4:10 p.m.Toronto Island
9h 16m
2 stops
SEA10:26 p.m.Seattle/Tacoma Intl
C$ 379
Find similar
Air Canada
25 Sep
SEA10:00 a.m.Seattle/Tacoma Intl
9h 36m
1 stop
YYZ10:36 p.m.Toronto Pearson Intl
1 Oct
YYZ8:40 a.m.Toronto Pearson Intl
5h 19m
SEA10:59 a.m.Seattle/Tacoma Intl
C$ 402
Find similar

WestJet flights from Seattle to Toronto

Our best WestJet deals on Seattle to Toronto flight tickets
WestJet
17 Oct
SEA1:50 p.m.Seattle/Tacoma Intl
7h 50m
1 stop
YHM12:40 a.m.Hamilton
20 Oct
YHM6:00 a.m.Hamilton
9h 59m
1 stop
SEA12:59 p.m.Seattle/Tacoma Intl
C$ 348
Find similar
WestJet
4 Oct
SEA1:50 p.m.Seattle/Tacoma Intl
7h 32m
1 stop
YYZ12:22 a.m.Toronto Pearson Intl
15 Oct
YYZ8:00 a.m.Toronto Pearson Intl
7h 59m
1 stop
SEA12:59 p.m.Seattle/Tacoma Intl
C$ 355
Find similar
WestJet
4 Oct
SEA1:50 p.m.Seattle/Tacoma Intl
7h 32m
1 stop
YYZ12:22 a.m.Toronto Pearson Intl
7 Oct
YYZ1:30 p.m.Toronto Pearson Intl
8h 44m
1 stop
SEA7:14 p.m.Seattle/Tacoma Intl
C$ 357
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 28 août 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

SeattleHamilton

SEA - YHM

SEAYHM

Seattle/Tacoma Intl

ven. 17/10

1:50 p.m.-12:40 a.m.

1 stop7h 50m

Hamilton

lun. 20/10

6:00 a.m.-12:59 p.m.

1 stop9h 59m

C$ 348

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

ven. 10/10

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

1 stop8h 16m

Toronto Pearson Intl

ven. 17/10

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

Nonstop5h 23m

C$ 354

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

sam. 4/10

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

1 stop7h 32m

Toronto Pearson Intl

mer. 15/10

8:00 a.m.-12:59 p.m.

1 stop7h 59m

C$ 355

SeattleToronto

SEA - YKF

SEAYKF

Seattle/Tacoma Intl

ven. 17/10

1:50 p.m.-12:45 a.m.

1 stop7h 55m

Toronto Region of Waterloo Intl

jeu. 23/10

6:00 a.m.-12:59 p.m.

1 stop9h 59m

C$ 355

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

sam. 4/10

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

1 stop7h 32m

Toronto Pearson Intl

mar. 7/10

1:30 p.m.-7:14 p.m.

1 stop8h 44m

C$ 357

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

ven. 17/10

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

1 stop7h 32m

Toronto Pearson Intl

lun. 20/10

8:00 a.m.-12:59 p.m.

1 stop7h 59m

C$ 358

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

jeu. 2/10

8:40 a.m.-12:31 a.m.

2 stops12h 51m

Toronto Pearson Intl

dim. 12/10

6:45 a.m.-12:33 p.m.

1 stop8h 48m

C$ 359

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

ven. 10/10

2:55 p.m.-6:31 a.m.

2 stops12h 36m

Toronto Pearson Intl

ven. 17/10

10:35 a.m.-6:36 p.m.

2 stops11h 01m

C$ 375

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

ven. 10/10

7:15 a.m.-7:49 p.m.

1 stop9h 34m

Toronto Island

ven. 17/10

4:10 p.m.-10:26 p.m.

2 stops9h 16m

C$ 379

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

mer. 24/9

7:16 a.m.-3:00 p.m.

Nonstop4h 44m

Toronto Pearson Intl

mer. 1/10

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

Nonstop5h 23m

C$ 406

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 January is, on average, the cheapest month to fly to Toronto from Seattle, with most prices found around C$ 391. The month of February is another great option to travel to Toronto, with average flight prices from Seattle averaging around C$ 395.

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$ 486. 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 Tuesday will generally be more expensive and average around C$ 1,166. 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 evening is the least expensive time of day to depart. momondo users have found prices as low as C$ 243 when looking at flights departing in the evening. Try not to purchase tickets in the morning because they tend to be around C$ 954. 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$ 591 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$ 404 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.

Can stopping save me money on Seattle to Toronto flights?

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

How have Seattle to Toronto flight prices changed over time?

As of August 2025, prices for Seattle to Toronto flights are approximately 36% 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$ 265

Fastest flight time

4h 35m

Direct flights

Every day

Airports in Toronto

1 airport
The best one-way flight to Toronto from Seattle in the past 72 hours is C$ 265. The best round-trip flight deal from Seattle to Toronto found on momondo in the last 72 hours is C$ 608.
The fastest flight from Seattle to Toronto takes 4h 35m
Direct flights go from Seattle to Toronto every day.
There is 1 airport near Toronto: 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 42m.

  • 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$ 191Free CancellationRating
7.1
10,000 reviews
Search Air Canada flights
WestJetPriceFrom C$ 324Free CancellationRating
7.2
3,063 reviews
Search WestJet flights
Alaska AirlinesPriceFrom C$ 422Free CancellationRating
8.0
10,000 reviews
Search Alaska Airlines flights
United AirlinesPriceFrom C$ 480Free CancellationRating
7.4
8,944 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 3 flights/week on average for this route. A good Alaska Airlines flight deal for Seattle to Toronto starts from C$ 305 round-trip, up to an average price of C$ 558. 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, 8,944 ratings). United Airlines flies from Seattle to Toronto around 6 times per week, with deals starting from C$ 347 round-trip and rising to an average price of around C$ 388.

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