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 60% 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.

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

Calgary (YYC) was the most common stop: 75% 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 $261.

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

As of March 2026, there are 21 flights per week flying from Seattle to Toronto. The most common day of the week flights depart is Wed, with 29% of flights taking off on this day.

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

As of March 2026, 3 flights take off from Seattle and land in Toronto each day. The most common flight departure time for this route is 7:00AM, with 96% of daily flights taking off at noon.

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

Calgary (YYC) has the shortest average layover time for this route: 1h 57m.

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

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

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: 7h 13m.

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 March 2026.

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.

$106 Cheap Flights from Seattle to Toronto in 2026

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One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

10:20 am - 11:46 pm

SEA

YYZ

10h 26m

2 stops

12:30 am - 10:05 am

YYZ

SEA

12h 35m

2 stops

$228Air Canada

Sat, Apr 25 - Fri, May 1

8:00 am - 3:54 pm

SEA

YYZ

4h 54mnonstop

12:30 am - 10:05 am

YYZ

SEA

12h 35m

2 stops

$230Air Canada

Sat, Apr 25 - Fri, May 1

10:20 am - 11:46 pm

SEA

YYZ

10h 26m

2 stops

12:30 am - 10:05 am

YYZ

SEA

12h 35m

2 stops

$233Air Canada

Sat, Apr 25 - Fri, May 1

10:20 am - 11:46 pm

SEA

YYZ

10h 26m

2 stops

12:30 am - 10:05 am

YYZ

SEA

12h 35m

2 stops

$235Air Canada

Sat, Apr 25 - Fri, May 1

8:00 am - 3:54 pm

SEA

YYZ

4h 54mnonstop

12:30 am - 10:05 am

YYZ

SEA

12h 35m

2 stops

$236Air Canada

Sat, Apr 25 - Fri, May 1

8:00 am - 3:54 pm

SEA

YYZ

4h 54mnonstop

12:30 am - 10:05 am

YYZ

SEA

12h 35m

2 stops

$237Air Canada

Sat, Apr 25 - Fri, May 1

8:00 am - 3:54 pm

SEA

YYZ

4h 54mnonstop

4:55 pm - 7:23 pm

YYZ

SEA

5h 28mnonstop

$244Multiple Airlines

Sat, Apr 25 - Sat, May 2

7:55 am - 3:45 pm

SEA

YYZ

4h 50mnonstop

4:55 pm - 7:23 pm

YYZ

SEA

5h 28mnonstop

$250Alaska Airlines

Sat, Apr 25 - Sat, May 2

3:10 pm - 5:29 am

SEA

YKF

11h 19m

1 stop

6:20 am - 2:19 pm

YKF

SEA

10h 59m

1 stop

$361WestJet

Fri, Apr 17 - Tue, Apr 21

3:10 pm - 5:29 am

SEA

YKF

11h 19m

1 stop

8:40 pm - 9:40 am

YKF

SEA

16h 00m

1 stop

$363WestJet

Fri, Apr 24 - Fri, May 1

United Airlines flights from Seattle to Toronto

Our best United Airlines deals on Seattle to Toronto flight tickets

United Airlines

Apr 28

SEA10:55 pmSeattle/Tacoma Intl

9h 48m

1 stop

YYZ11:43 amToronto Pearson Intl

Apr 29

YYZ2:30 pmToronto Pearson Intl

9h 23m

1 stop

SEA8:53 pmSeattle/Tacoma Intl

$315

United Airlines

Jun 3

SEA7:40 amSeattle/Tacoma Intl

8h 02m

1 stop

YTZ6:42 pmToronto Island

Jun 6

YTZ12:15 pmToronto Island

12h 44m

2 stops

SEA9:59 pmSeattle/Tacoma Intl

$437

United Airlines

Jun 3

SEA10:40 pmSeattle/Tacoma Intl

8h 26m

1 stop

YTZ10:06 amToronto Island

Jun 8

YTZ2:55 pmToronto Island

8h 51m

1 stop

SEA8:46 pmSeattle/Tacoma Intl

$438

Air Canada flights from Seattle to Toronto

Our best Air Canada deals on Seattle to Toronto flight tickets

Air Canada

Apr 25

SEA10:20 amSeattle/Tacoma Intl

10h 26m

2 stops

YYZ11:46 pmToronto Pearson Intl

May 1

YYZ12:30 amToronto Pearson Intl

12h 35m

2 stops

SEA10:05 amSeattle/Tacoma Intl

$228

Air Canada

Apr 25

SEA8:00 amSeattle/Tacoma Intl

4h 54m

YYZ3:54 pmToronto Pearson Intl

May 1

YYZ12:30 amToronto Pearson Intl

12h 35m

2 stops

SEA10:05 amSeattle/Tacoma Intl

$230

Air Canada

Apr 25

SEA10:20 amSeattle/Tacoma Intl

10h 26m

2 stops

YYZ11:46 pmToronto Pearson Intl

May 1

YYZ12:30 amToronto Pearson Intl

12h 35m

2 stops

SEA10:05 amSeattle/Tacoma Intl

$233

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Sat 4/25

10:20 am-11:46 pm

2 stops10h 26m

Toronto Pearson Intl

Fri 5/1

12:30 am-10:05 am

2 stops12h 35m

$228

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Sat 4/25

8:00 am-3:54 pm

Nonstop4h 54m

Toronto Pearson Intl

Fri 5/1

12:30 am-10:05 am

2 stops12h 35m

$230

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Sat 4/25

10:20 am-11:46 pm

2 stops10h 26m

Toronto Pearson Intl

Fri 5/1

12:30 am-10:05 am

2 stops12h 35m

$233

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Sat 4/25

10:20 am-11:46 pm

2 stops10h 26m

Toronto Pearson Intl

Fri 5/1

12:30 am-10:05 am

2 stops12h 35m

$235

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Sat 4/25

8:00 am-3:54 pm

Nonstop4h 54m

Toronto Pearson Intl

Fri 5/1

12:30 am-10:05 am

2 stops12h 35m

$236

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Sat 4/25

8:00 am-3:54 pm

Nonstop4h 54m

Toronto Pearson Intl

Fri 5/1

12:30 am-10:05 am

2 stops12h 35m

$237

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Sat 4/25

8:00 am-3:54 pm

Nonstop4h 54m

Toronto Pearson Intl

Sat 5/2

4:55 pm-7:23 pm

Nonstop5h 28m

$244

Quickest round-trip

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Sat 4/25

7:55 am-3:45 pm

Nonstop4h 50m

Toronto Pearson Intl

Sat 5/2

4:55 pm-7:23 pm

Nonstop5h 28m

$250

SeattleToronto

SEA - YKF

SEAYKF

Seattle/Tacoma Intl

Fri 4/17

3:10 pm-5:29 am

1 stop11h 19m

Toronto Region of Waterloo Intl

Tue 4/21

6:20 am-2:19 pm

1 stop10h 59m

$361

SeattleToronto

SEA - YKF

SEAYKF

Seattle/Tacoma Intl

Fri 4/24

3:10 pm-5:29 am

1 stop11h 19m

Toronto Region of Waterloo Intl

Fri 5/1

8:40 pm-9:40 am

1 stop16h 00m

$363

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

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Layovers

Other information

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 $250. If you are unable to visit Toronto during the month of January, then departing from Seattle during the month November is also very affordable. Most momondo users find prices during this month for around $274.

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 $506. However, this price may fluctuate depending on the airline, the season, and holidays. The most expensive day to fly to Toronto is Sunday, with ticket prices averaging around $697.

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 $380 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 $242 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 11% 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 March 2026, 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	$239
Fastest flight time	4h 40m
Direct flights	Every day
Airports in Toronto	3 airports

The best one-way flight to Toronto from Seattle in the past 72 hours is $239. The best round-trip flight deal from Seattle to Toronto found on momondo in the last 72 hours is $461.

The fastest flight from Seattle to Toronto takes 4h 40m

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

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 March 2026.
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 Airbus A330-900neo, making up 18.35% of the total bookings. Other popular models include Airbus A320-100/200 with 17.99%, Airbus A330-200 with 13.67%, and Boeing 777-300ER with 6.47%.
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 60% of all bookings. The subsequent popular airlines are Air Canada at 19%, WestJet at 10%, 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
Delta	PriceFrom $138	Free Cancellation	Rating 7.9 8,336 reviews	Search Delta flights
Air Canada	PriceFrom $165	Free Cancellation	Rating 7.1 10,842 reviews	Search Air Canada flights
WestJet	PriceFrom $222	Free Cancellation	Rating 7.2 3,303 reviews	Search WestJet flights
Alaska Airlines	PriceFrom $252	Free Cancellation	Rating 7.9 12,117 reviews	Search Alaska Airlines flights
United Airlines	PriceFrom $277	Free Cancellation	Rating 7.4 9,487 reviews	Search United Airlines flights

Alaska Airlines Flights From Seattle to Toronto
Alaska Airlines flight deals from Seattle to Toronto start from $252 round-trip. Over the 2 Alaska Airlines flights for this route in a normal week, average airfare is usually $431 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 $277 round-trip, depending on your selected dates, with average United Airlines deals seen on momondo around $380. United Airlines operates 5 flights to Toronto from Seattle in an average week. Users have rated it 7.4/10 across 9,487 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

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Fly into one of these airports located in Toronto

Toronto Region of Waterloo Intl Airport

Toronto Island Airport

Toronto Pearson Intl Airport

Cheap flights from Seattle to Toronto from $106

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 5/16. 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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See travel insights to Toronto from

How to get the cheapest flight ticket from Seattle to Toronto

What is the typical price of a round-trip flight between Seattle and Toronto?

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 Seattle/Tacoma Intl to Toronto flight route?

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

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

Can stopping save me money on Seattle to Toronto flights?

How have Seattle to Toronto flight prices changed over time?

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

What airlines fly to Toronto?

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

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

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

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

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

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

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

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?

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

Airports listed have a maximum distance of 52.0 mi from Toronto

Fly your favorite airline to Toronto

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to Toronto

List of cabin classes available on flights landing in Toronto. Availability may vary depending on flight origin and airline.

Popular cities in Canada

Popular flights according to clicks in the last 7 days on momondo

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According to popular flight searches on momondo this year

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