What airlines fly to Toronto?

Alaska Airlines, Air Canada and WestJet are the top three most popular airlines that fly to Toronto from Seattle according to our data. Alaska Airlines is the first choice among our users, with 56% of people opting to fly with this airline when traveling to Toronto. Keep in mind that there are 5 different airlines that fly to Toronto on a routine basis, so you have a few additional options to choose from.

What is the cheapest airline that flies from Seattle/Tacoma Intl to Toronto?

WestJet, United Airlines, and Air Canada are the most popular carriers operating from Seattle/Tacoma Intl to Toronto

How many flights depart from Seattle to Toronto on average per week?

As of September 2025, there are 34 flights per week flying from Seattle to Toronto. The most common day of the week flights depart is Wed, with 18% of flights taking off on this day.

How many flights depart from Seattle to Toronto on average per day?

As of September 2025, 4 flights take off from Seattle and land in Toronto each day. The most common flight departure time for this route is 7:00AM, with 58% of daily flights taking off at noon.

Which layover airport offers the lowest fares from Seattle to Toronto?

Flights via Calgary (YYC) offer the lowest average round-trip price of $314.

Which airport is the most popular layover for flights between Seattle and Toronto?

Calgary (YYC) was the most common stop: 83% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport has the shortest travel time from Seattle to Toronto?

Flights connecting via Vancouver (YVR) have the shortest average one-way travel time: 6h 58m.

Which layover airport has the shortest connection time from Seattle to Toronto?

Vancouver (YVR) has the shortest average layover time for this route: 1h 20m.

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?

The number of operators available for flights from Seattle/Tacoma Intl Airport to Toronto is 5 as of September 2025.

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 you'll need for your trip to Toronto may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Toronto. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$92 Cheap Flights from Seattle to Toronto in 2025/26

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Find the cheapest flights from Seattle to Toronto

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

2:05 pm - 12:40 amSEA-YHM

7h 35m1 stop

6:00 am - 12:59 pmYHM-SEA

9h 59m1 stop

$229WestJet

Find Deal

Tue, Oct 14 - Tue, Oct 21

8:40 am - 12:40 amSEA-YHM

13h 00m1 stop

6:00 am - 12:59 pmYHM-SEA

9h 59m1 stop

$235WestJet

Find Deal

Sun, Oct 12 - Wed, Oct 15

8:40 am - 12:22 amSEA-YYZ

12h 42m1 stop

6:45 am - 12:35 pmYYZ-SEA

8h 50m1 stop

$252WestJet

Find Deal

Wed, Oct 8 - Sun, Oct 12

2:05 pm - 11:48 pmSEA-YHM

30h 43m2 stops

6:00 am - 12:59 pmYHM-SEA

9h 59m1 stop

$253Multiple Airlines

Find Deal

Tue, Oct 14 - Tue, Oct 21

8:15 am - 3:58 pmSEA-YYZ

4h 43mnonstop

7:50 pm - 10:16 pmYYZ-SEA

5h 26mnonstop

$258Air Canada

Find Deal

Sat, Nov 1 - Sun, Nov 16

2:55 pm - 7:00 amSEA-YYZ

13h 05m2 stops

10:25 am - 6:36 pmYYZ-SEA

11h 11m2 stops

$260Air Canada

Find Deal

Mon, Oct 6 - Tue, Oct 7

7:55 am - 3:35 pmSEA-YYZ

4h 40mnonstop

7:45 am - 2:20 pmYYZ-SEA

9h 35m1 stop

$263Multiple Airlines

Find Deal

Fri, Oct 31 - Mon, Nov 3

7:55 am - 3:35 pmSEA-YYZ

4h 40mnonstop

4:45 pm - 7:05 pmYYZ-SEA

5h 20mnonstop

$273Alaska Airlines

Find Deal

Sun, Nov 9 - Thu, Nov 13

11:40 pm - 9:58 amSEA-YYZ

7h 18m1 stop

12:45 pm - 8:44 pmYYZ-SEA

10h 59m1 stop

$274United Airlines

Find Deal

Mon, Oct 6 - Tue, Oct 7

10:35 pm - 9:58 amSEA-YYZ

8h 23m1 stop

2:30 pm - 8:44 pmYYZ-SEA

9h 14m1 stop

$276United Airlines

Find Deal

Tue, Oct 7 - Sat, Oct 18

WestJet flights from Seattle to Toronto

Our best WestJet deals on Seattle to Toronto flight tickets

WestJet

Oct 14

SEA2:05 pmSeattle/Tacoma Intl

7h 35m

1 stop

YHM12:40 amHamilton

Oct 21

YHM6:00 amHamilton

9h 59m

1 stop

SEA12:59 pmSeattle/Tacoma Intl

$229

Find similar

WestJet

Oct 12

SEA8:40 amSeattle/Tacoma Intl

13h 00m

1 stop

YHM12:40 amHamilton

Oct 15

YHM6:00 amHamilton

9h 59m

1 stop

SEA12:59 pmSeattle/Tacoma Intl

$235

Find similar

WestJet

Oct 8

SEA8:40 amSeattle/Tacoma Intl

12h 42m

1 stop

YYZ12:22 amToronto Pearson Intl

Oct 12

YYZ6:45 amToronto Pearson Intl

8h 50m

1 stop

SEA12:35 pmSeattle/Tacoma Intl

$252

Find similar

United Airlines flights from Seattle to Toronto

Our best United Airlines deals on Seattle to Toronto flight tickets

United Airlines

Oct 6

SEA11:40 pmSeattle/Tacoma Intl

7h 18m

1 stop

YYZ9:58 amToronto Pearson Intl

Oct 7

YYZ12:45 pmToronto Pearson Intl

10h 59m

1 stop

SEA8:44 pmSeattle/Tacoma Intl

$274

Find similar

United Airlines

Oct 7

SEA10:35 pmSeattle/Tacoma Intl

8h 23m

1 stop

YYZ9:58 amToronto Pearson Intl

Oct 18

YYZ2:30 pmToronto Pearson Intl

9h 14m

1 stop

SEA8:44 pmSeattle/Tacoma Intl

$276

Find similar

United Airlines

Oct 11

SEA12:43 pmSeattle/Tacoma Intl

7h 05m

1 stop

YYZ10:48 pmToronto Pearson Intl

Oct 14

YYZ6:10 amToronto Pearson Intl

20h 05m

1 stop

SEA11:15 pmSeattle/Tacoma Intl

$287

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SeattleHamilton

SEA - YHM

SEAYHM

Seattle/Tacoma Intl

Tue 10/14

2:05 pm-12:40 am

1 stop7h 35m

Hamilton

Tue 10/21

6:00 am-12:59 pm

1 stop9h 59m

$229

SeattleHamilton

SEA - YHM

SEAYHM

Seattle/Tacoma Intl

Sun 10/12

8:40 am-12:40 am

1 stop13h 00m

Hamilton

Wed 10/15

6:00 am-12:59 pm

1 stop9h 59m

$235

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Wed 10/8

8:40 am-12:22 am

1 stop12h 42m

Toronto Pearson Intl

Sun 10/12

6:45 am-12:35 pm

1 stop8h 50m

$252

SeattleHamilton

SEA - YHM

SEAYHM

Seattle/Tacoma Intl

Tue 10/14

2:05 pm-11:48 pm

2 stops30h 43m

Hamilton

Tue 10/21

6:00 am-12:59 pm

1 stop9h 59m

$253

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Sat 11/1

8:15 am-3:58 pm

Nonstop4h 43m

Toronto Pearson Intl

Sun 11/16

7:50 pm-10:16 pm

Nonstop5h 26m

$258

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Mon 10/6

2:55 pm-7:00 am

2 stops13h 05m

Toronto Pearson Intl

Tue 10/7

10:25 am-6:36 pm

2 stops11h 11m

$260

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Fri 10/31

7:55 am-3:35 pm

Nonstop4h 40m

Toronto Pearson Intl

Mon 11/3

7:45 am-2:20 pm

1 stop9h 35m

$263

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Sun 11/9

7:55 am-3:35 pm

Nonstop4h 40m

Toronto Pearson Intl

Thu 11/13

4:45 pm-7:05 pm

Nonstop5h 20m

$273

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Mon 10/6

11:40 pm-9:58 am

1 stop7h 18m

Toronto Pearson Intl

Tue 10/7

12:45 pm-8:44 pm

1 stop10h 59m

$274

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Tue 10/7

10:35 pm-9:58 am

1 stop8h 23m

Toronto Pearson Intl

Sat 10/18

2:30 pm-8:44 pm

1 stop9h 14m

$276

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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

Prices

Airlines

Layovers

Other information

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 $282. If you are unable to visit Toronto during the month of January, then departing from Seattle during the month February is also very affordable. Most momondo users find prices during this month for around $286.

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

On average, the least expensive day to fly to Toronto from Seattle is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $549. However, this price may fluctuate depending on the airline, the season, and holidays. The most expensive day to fly to Toronto is Saturday, with ticket prices averaging around $703.

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

In the afternoon is the cheapest time of day to fly from Seattle to Toronto when you can find flight prices for as low as $283. Flying to Toronto in the afternoon is an ideal time because this is during off-peak travel hours. Flights to Toronto are more costly in the evening, with an average ticket price of $627. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

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 $423 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 $292 on momondo.

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

There are 4 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?

You could potentially save up to 27% 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 September 2025, prices for Seattle to Toronto flights are approximately 42% 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	$139
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 $139. The best round-trip flight deal from Seattle to Toronto found on momondo in the last 72 hours is $374.

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?
Seattle/Tacoma Intl and Toronto are 2065.1 mi apart from one another. By plane, this route typically takes 4h 40m.
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?
The number of operators available for flights from Seattle/Tacoma Intl Airport to Toronto is 5 as of September 2025.
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 you'll need for your trip to Toronto may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Toronto. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Seattle to Toronto?
Based on momondo bookings for flights between Seattle and Toronto, the leading plane model is Boeing 737 MAX 8, making up 25.57% of the total bookings. Other popular models include Airbus A320-100/200 with 20.28%, Airbus A220-300 with 18.87%, and Boeing 737-900 Passenger/BBJ3 (winglets) with 8.64%.
What is the most popular airline from Seattle to Toronto?
momondo data reveals that the most frequently booked airline on the route from Seattle to Toronto is Alaska Airlines, representing 56% of all bookings. The subsequent popular airlines are Air Canada at 19%, WestJet at 12%, and Delta at 7%.

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 Canada	PriceFrom $128	Free Cancellation	Rating 7.1 10,000 reviews	Search Air Canada flights
United Airlines	PriceFrom $173	Free Cancellation	Rating 7.4 8,926 reviews	Search United Airlines flights
Delta	PriceFrom $186	Free Cancellation	Rating 7.9 7,961 reviews	Search Delta flights
WestJet	PriceFrom $235	Free Cancellation	Rating 7.2 3,095 reviews	Search WestJet flights
Alaska Airlines	PriceFrom $276	Free Cancellation	Rating 8.0 10,000 reviews	Search Alaska Airlines flights

Alaska Airlines Flights From Seattle to Toronto
Alaska Airlines flight deals from Seattle to Toronto start from $276 round-trip. Over the 4 Alaska Airlines flights for this route in a normal week, average airfare is usually $500 round-trip - but some users have found much cheaper deals with momondo.
United Airlines Flights From Seattle to Toronto
United Airlines is also a popular choice for this route. United Airlines flight deals for Seattle to Toronto start from as low as $173 round-trip, depending on your selected dates, with average United Airlines deals seen on momondo around $391. United Airlines operates 7 flights to Toronto from Seattle in an average week. Users have rated it 7.4/10 across 8,926 reviews.

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?

momondo does allow users to show only those flights to Toronto from Seattle which offer a flexible booking policy as well as other useful filters and features.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Seattle to Toronto.

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

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

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Find better results for your trip to Canada

Fly into one of these airports located in Toronto

Toronto Region of Waterloo Intl Airport

Toronto Island Airport

Toronto Pearson Intl Airport

Popular cities in Canada

Flights to Vancouverfrom $85

Flights to Montrealfrom $186

Flights to Calgaryfrom $132

Flights to Ottawafrom $190

Flights to Halifaxfrom $188

Flights to Winnipegfrom $157

Flights to Québec Cityfrom $177

Flights to Saskatoonfrom $117

Flights to Kelownafrom $156

Flights to St. John'sfrom $244

Flights to Reginafrom $206

Flights to Monctonfrom $393

Cheap flights from Seattle to Toronto from $92

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 10/24. 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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Big names and deals

Filter for what you want

Filter for what you want

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Find the cheapest flights from Seattle to Toronto

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WestJet flights from Seattle to Toronto

Our best WestJet deals on Seattle to Toronto flight tickets

United Airlines flights from Seattle to Toronto

Our best United Airlines deals on Seattle to Toronto flight tickets

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Use the filters below to find and compare flights from Seattle to Toronto that are best for you.

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 cheapest month to fly to Toronto?

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

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

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?

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

There are 4 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?

You could potentially save up to 27% 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 September 2025, prices for Seattle to Toronto flights are approximately 42% cheaper when compared to flights at the same time last year.

What is the cheapest airline that flies from Seattle/Tacoma Intl to Toronto?

WestJet, United Airlines, and Air Canada are the most popular carriers operating from Seattle/Tacoma Intl to Toronto

What airlines fly to Toronto?

Which airport is the most popular layover for flights between Seattle and Toronto?

Calgary (YYC) was the most common stop: 83% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport offers the lowest fares from Seattle to Toronto?

Flights via Calgary (YYC) offer the lowest average round-trip price of $314.

Which layover airport has the shortest travel time from Seattle to Toronto?

Flights connecting via Vancouver (YVR) have the shortest average one-way travel time: 6h 58m.

Which layover airport has the shortest connection time from Seattle to Toronto?

Vancouver (YVR) has the shortest average layover time for this route: 1h 20m.

How many flights depart from Seattle to Toronto on average per day?

As of September 2025, 4 flights take off from Seattle and land in Toronto each day. The most common flight departure time for this route is 7:00AM, with 58% of daily flights taking off at noon.

How many flights depart from Seattle to Toronto on average per week?

As of September 2025, there are 34 flights per week flying from Seattle to Toronto. The most common day of the week flights depart is Wed, with 18% of flights taking off on this day.

When to book flights from Seattle to Toronto

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

Fastest flight time

Direct flights

Airports in Toronto

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

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

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?

What documentation or ID do you need to fly to Toronto?

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

Alaska Airlines Flights From Seattle to Toronto

United Airlines Flights From Seattle to Toronto

Why use momondo?

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

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

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

I’m not ready to book a flight from Seattle to Toronto right now. Can momondo alert me if prices change?

An easier way to manage your Toronto trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Canada

Fly into one of these airports located in Toronto