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

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

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

As of November 2025, there are 33 flights per week flying from Toronto to Seattle. The most common day of the week flights depart is Thu, with 21% of flights taking off on this day.

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

Flights via Calgary (YYC) offer the lowest average round-trip price of $374.

How long does it take to fly to Seattle?

Flight times vary depending on what airport in Toronto you fly out of and what airport in Seattle you fly into. For example, flying from Toronto to Seattle takes 8h 07m on average. On the other hand, flying from Hamilton to Seattle takes 10h 08m on average. Keep in mind that it’s always quicker to opt for a non-stop flight, so be sure to check momondo if there are any available for your route.

What airlines fly to Seattle?

Alaska Airlines, Air Canada and WestJet are the top three most popular airlines that fly to Seattle from Toronto according to our data. Alaska Airlines is the first choice among our users, with 38% of people opting to fly with this airline when traveling to Seattle. Keep in mind that there are 6 different airlines that fly to Seattle on a routine basis, so you have a few additional options to choose from.

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

Vancouver (YVR) has the shortest average layover time for this route: 1h 34m.

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

Flights connecting via Vancouver (YVR) have the shortest average one-way travel time: 7h 55m.

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

Vancouver (YVR) was the most common stop: 63% of momondo users choosing 1-stop flights on this route connected there.

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

As of November 2025, 4 flights take off from Toronto and land in Seattle each day. The most common flight departure time for this route is 7:00PM, with 50% of daily flights taking off in the afternoon.

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

Prices for flights from Toronto to Seattle/Tacoma Intl Airport are refreshed on a daily basis.

How many operators does momondo search for flights from Toronto to Seattle/Tacoma Intl Airport?

There are 6 operators available for flights from Toronto to Seattle/Tacoma Intl Airport as of November 2025.

How old do you have to be to fly from Toronto to Seattle/Tacoma Intl Airport?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Toronto to Seattle/Tacoma Intl Airport.

What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

The necessary travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$145 Cheap Flights from Toronto to Seattle in 2025/26

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

Prices are currently low for flights on this route. Typical prices usually range from $276 to $479. The lowest price recently found on this route was $216.

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Cheap round-trip flights

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7:45 am - 2:20 pmYYZ-SEA

9h 35m1 stop

3:10 pm - 6:58 amSEA-YYZ

12h 48m2 stops

$216WestJet

Find Deal

Tue, Dec 9 - Thu, Dec 11

12:30 pm - 2:20 pmYYZ-SEA

28h 50m2 stops

3:10 pm - 5:58 amSEA-YYZ

11h 48m2 stops

$218WestJet

Find Deal

Thu, Jan 22 - Mon, Jan 26

7:45 am - 2:20 pmYYZ-SEA

9h 35m1 stop

11:55 am - 6:58 amSEA-YYZ

16h 03m1 stop

$220WestJet

Find Deal

Thu, Jan 22 - Mon, Jan 26

4:45 pm - 7:18 pmYYZ-SEA

5h 33mnonstop

7:55 am - 3:35 pmSEA-YYZ

4h 40mnonstop

$247Alaska Airlines

Find Deal

Fri, Dec 12 - Wed, Jan 7

4:45 pm - 7:17 pmYYZ-SEA

5h 32mnonstop

7:55 am - 3:35 pmSEA-YYZ

4h 40mnonstop

$248Alaska Airlines

Find Deal

Mon, Jan 12 - Tue, Jan 13

7:50 pm - 10:16 pmYYZ-SEA

5h 26mnonstop

3:40 pm - 5:38 amSEA-YYZ

10h 58m2 stops

$250Air Canada

Find Deal

Sat, Dec 13 - Sat, Jan 10

5:55 pm - 12:50 amYYZ-SEA

9h 55m1 stop

7:00 am - 11:59 pmSEA-YYZ

13h 59m1 stop

$254United Airlines

Find Deal

Tue, Dec 16 - Wed, Jan 7

7:50 pm - 10:16 pmYYZ-SEA

5h 26mnonstop

5:50 am - 9:08 pmSEA-YYZ

12h 18m2 stops

$258Air Canada

Find Deal

Thu, Dec 11 - Sat, Jan 10

3:38 pm - 10:25 pmYYZ-SEA

9h 47m1 stop

9:55 pm - 11:17 amSEA-YYZ

10h 22m1 stop

$265Delta

Find Deal

Mon, Dec 15 - Mon, Jan 5

12:13 pm - 6:32 pmYYZ-SEA

9h 19m1 stop

11:15 pm - 8:53 amSEA-YYZ

6h 38m1 stop

$270Delta

Find Deal

Thu, Dec 4 - Sun, Dec 7

Delta flights from Toronto to Seattle

Our best Delta deals on Toronto to Seattle flight tickets

Delta

Dec 15

YYZ3:38 pmToronto Pearson Intl

9h 47m

1 stop

SEA10:25 pmSeattle/Tacoma Intl

Jan 5

SEA9:55 pmSeattle/Tacoma Intl

10h 22m

1 stop

YYZ11:17 amToronto Pearson Intl

$265

Find similar

Delta

Dec 4

YYZ12:13 pmToronto Pearson Intl

9h 19m

1 stop

SEA6:32 pmSeattle/Tacoma Intl

Dec 7

SEA11:15 pmSeattle/Tacoma Intl

6h 38m

1 stop

YYZ8:53 amToronto Pearson Intl

$270

Find similar

Alaska Airlines flights from Toronto to Seattle

Our best Alaska Airlines deals on Toronto to Seattle flight tickets

Alaska Airlines

Dec 12

YYZ4:45 pmToronto Pearson Intl

5h 33m

SEA7:18 pmSeattle/Tacoma Intl

Jan 7

SEA7:55 amSeattle/Tacoma Intl

4h 40m

YYZ3:35 pmToronto Pearson Intl

$247

Find similar

Alaska Airlines

Jan 12

YYZ4:45 pmToronto Pearson Intl

5h 32m

SEA7:17 pmSeattle/Tacoma Intl

Jan 13

SEA7:55 amSeattle/Tacoma Intl

4h 40m

YYZ3:35 pmToronto Pearson Intl

$248

Find similar

Alaska Airlines

Dec 12

YYZ4:45 pmToronto Pearson Intl

5h 33m

SEA7:18 pmSeattle/Tacoma Intl

Jan 8

SEA7:55 amSeattle/Tacoma Intl

4h 40m

YYZ3:35 pmToronto Pearson Intl

$255

Find similar

Fly from

Fly to

Route

Depart

Return

Price

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Tue 12/9

7:45 am-2:20 pm

1 stop9h 35m

Seattle/Tacoma Intl

Thu 12/11

3:10 pm-6:58 am

2 stops12h 48m

$216

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Thu 1/22

12:30 pm-2:20 pm

2 stops28h 50m

Seattle/Tacoma Intl

Mon 1/26

3:10 pm-5:58 am

2 stops11h 48m

$218

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Thu 1/22

7:45 am-2:20 pm

1 stop9h 35m

Seattle/Tacoma Intl

Mon 1/26

11:55 am-6:58 am

1 stop16h 03m

$220

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Fri 12/12

4:45 pm-7:18 pm

Nonstop5h 33m

Seattle/Tacoma Intl

Wed 1/7

7:55 am-3:35 pm

Nonstop4h 40m

$247

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Mon 1/12

4:45 pm-7:17 pm

Nonstop5h 32m

Seattle/Tacoma Intl

Tue 1/13

7:55 am-3:35 pm

Nonstop4h 40m

$248

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sat 12/13

7:50 pm-10:16 pm

Nonstop5h 26m

Seattle/Tacoma Intl

Sat 1/10

3:40 pm-5:38 am

2 stops10h 58m

$250

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Tue 12/16

5:55 pm-12:50 am

1 stop9h 55m

Seattle/Tacoma Intl

Wed 1/7

7:00 am-11:59 pm

1 stop13h 59m

$254

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Thu 12/11

7:50 pm-10:16 pm

Nonstop5h 26m

Seattle/Tacoma Intl

Sat 1/10

5:50 am-9:08 pm

2 stops12h 18m

$258

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Mon 12/15

3:38 pm-10:25 pm

1 stop9h 47m

Seattle/Tacoma Intl

Mon 1/5

9:55 pm-11:17 am

1 stop10h 22m

$265

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Thu 12/4

12:13 pm-6:32 pm

1 stop9h 19m

Seattle/Tacoma Intl

Sun 12/7

11:15 pm-8:53 am

1 stop6h 38m

$270

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 Toronto to Seattle

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

What is the cheapest month to fly to Seattle?

In general, February is the cheapest month to fly from Toronto to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $263. If you don’t want to visit Seattle in February, then you should wait until January to fly from Toronto, when ticket prices are also cheap, with an average price of $266.

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

On average, the least expensive day to fly to Seattle from Toronto is on a Friday. momondo users have found tickets for Friday departures for as low as $440. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Sunday is the most expensive day to depart from Toronto because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $649.

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

Flying to Seattle from Toronto in the evening is the least expensive time of day to depart. momondo users have found prices as low as $266 when looking at flights departing in the evening. Flights to Seattle are more costly at noon, with an average ticket price of $539. Departure times at noon fall within the peak daily travel times, which is why tickets can be more expensive.

What is the cheapest Toronto to Seattle/Tacoma Intl flight route?

Fly from Toronto Pearson Intl to Seattle/Tacoma Intl for the best Toronto - Seattle/Tacoma Intl flight prices

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

You are more likely to see cheaper flights to Seattle from Toronto when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $354 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Toronto for as low as $304 on momondo.

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

There are 4 cabin classes available to choose from on Toronto to Seattle/Tacoma 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 Toronto to Seattle flights?

You could potentially save up to 35% on your flight if you consider stops on a Toronto to Seattle flight.

How have Toronto to Seattle flight prices changed over time?

As of November 2025, prices for Toronto to Seattle flights are approximately 29% cheaper when compared to flights at the same time last year.

When to book flights from Toronto to Seattle

Are you open to changing your travel dates? Check out the ideal times to fly from Toronto to Seattle according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Toronto to Seattle (YTO to SEA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Toronto to Seattle

Best Price Found	$184
Fastest flight time	5h 20m
Direct flights	Every day
Airports in Seattle	1 airport

The best one-way flight to Seattle from Toronto in the past 72 hours is $184. The best round-trip flight deal from Toronto to Seattle found on momondo in the last 72 hours is $325.

The fastest flight from Toronto to Seattle takes 5h 20m

Direct flights go from Toronto to Seattle every day.

There is 1 airport near Seattle: Seattle/Tacoma Intl (SEA)

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How far is Toronto to Seattle/Tacoma Intl by plane?
The distance between Toronto and Seattle/Tacoma Intl is about 2065.1 mi. Typically, this will take 5h 26m by plane in normal conditions.
When did momondo last update prices for flights from Toronto to Seattle/Tacoma Intl Airport?
Prices for flights from Toronto to Seattle/Tacoma Intl Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Toronto to Seattle/Tacoma Intl Airport?
There are 6 operators available for flights from Toronto to Seattle/Tacoma Intl Airport as of November 2025.
How old do you have to be to fly from Toronto to Seattle/Tacoma Intl Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Toronto to Seattle/Tacoma Intl Airport.
What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?
The necessary travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Toronto to Seattle?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Toronto to Seattle is Airbus A220-300 (44.21% of total bookings). The next most popular plane models are Airbus A320-100/200 (16.32%), Boeing 737 MAX 8 (12.04%), and Embraer 195 E2 (4.51%).
What is the most popular airline from Toronto to Seattle?
momondo data reveals that the most frequently booked airline on the route from Toronto to Seattle is Air Canada, representing 33% of all bookings. The subsequent popular airlines are Alaska Airlines at 32%, WestJet at 17%, and Delta at 10%.

Best airlines flying from Toronto to Seattle

Compare and see reviews for airlines that fly from Toronto to Seattle with momondo

Airline	Rating	Free Cancellation	Price
WestJet	PriceFrom $192	Free Cancellation	Rating 7.2 3,154 reviews	Search WestJet flights
Alaska Airlines	PriceFrom $225	Free Cancellation	Rating 8.0 11,242 reviews	Search Alaska Airlines flights
Air Canada	PriceFrom $238	Free Cancellation	Rating 7.1 10,410 reviews	Search Air Canada flights
United Airlines	PriceFrom $243	Free Cancellation	Rating 7.4 9,003 reviews	Search United Airlines flights
American Airlines	PriceFrom $277	Free Cancellation	Rating 7.2 11,040 reviews	Search American Airlines flights
Delta	PriceFrom $289	Free Cancellation	Rating 7.9 8,001 reviews	Search Delta flights

Alaska Airlines Flights From Toronto to Seattle
Alaska Airlines is one of the most popular airlines flying from Toronto to Seattle, operating 1 flight/week on average for this route. A good Alaska Airlines flight deal for Toronto to Seattle starts from $225 round-trip, up to an average price of $421. Our users have rated Alaska Airlines at 8.0/10.
United Airlines Flights From Toronto to Seattle
The best United Airlines deal for Toronto to Seattle flight tickets found on momondo in the last 72 hours was $243, round-trip. It should be noted that an average United Airlines flight deal for this route in this time was higher, at $456 round-trip. United Airlines operates 10 flights out of Toronto into Seattle in an average week, so prices vary by time and availability. 9,003 United Airlines reviews by users on momondo have scored the airline at 7.4/10.

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SeaTac

Ocean Shores

Renton

Olympia

Lynnwood

Kent

Puyallup

Marysville

Redmond

Tukwila

Lakewood

Federal Way

Fife

Cle Elum

Centralia

Kirkland

Westport

Shoreline

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Toronto to Seattle. Millions of users trust and use momondo every year so you are in good hands.

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

Flights from Toronto to Seattle 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 Toronto to Seattle?

Once you have performed a search for Toronto to Seattle 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 Toronto to Seattle right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Toronto to Seattle now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Seattle and let you know when they change.

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Cheap flights from Toronto to Seattle from $145

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Toronto to Seattle departing on 1/27. 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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Delta flights from Toronto to Seattle

Our best Delta deals on Toronto to Seattle flight tickets

Alaska Airlines flights from Toronto to Seattle

Our best Alaska Airlines deals on Toronto to Seattle flight tickets

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How to get the cheapest flight ticket from Toronto to Seattle

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 Toronto and Seattle?

What is the cheapest month to fly to Seattle?

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

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

What is the cheapest Toronto to Seattle/Tacoma Intl flight route?

Fly from Toronto Pearson Intl to Seattle/Tacoma Intl for the best Toronto - Seattle/Tacoma Intl flight prices

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

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

There are 4 cabin classes available to choose from on Toronto to Seattle/Tacoma 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 Toronto to Seattle flights?

You could potentially save up to 35% on your flight if you consider stops on a Toronto to Seattle flight.

How have Toronto to Seattle flight prices changed over time?

As of November 2025, prices for Toronto to Seattle flights are approximately 29% cheaper when compared to flights at the same time last year.

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

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

What airlines fly to Seattle?

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

Vancouver (YVR) was the most common stop: 63% of momondo users choosing 1-stop flights on this route connected there.

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

Flights via Calgary (YYC) offer the lowest average round-trip price of $374.

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

Flights connecting via Vancouver (YVR) have the shortest average one-way travel time: 7h 55m.

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

Vancouver (YVR) has the shortest average layover time for this route: 1h 34m.

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

As of November 2025, 4 flights take off from Toronto and land in Seattle each day. The most common flight departure time for this route is 7:00PM, with 50% of daily flights taking off in the afternoon.

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

As of November 2025, there are 33 flights per week flying from Toronto to Seattle. The most common day of the week flights depart is Thu, with 21% of flights taking off on this day.

How long does it take to fly to Seattle?

When to book flights from Toronto to Seattle

Cheap Toronto to Seattle (YTO to SEA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Toronto to Seattle

Best Price Found

Fastest flight time

Direct flights

Airports in Seattle

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

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

How many operators does momondo search for flights from Toronto to Seattle/Tacoma Intl Airport?

How old do you have to be to fly from Toronto to Seattle/Tacoma Intl Airport?

What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

What is the most popular plane model from Toronto to Seattle?

What is the most popular airline from Toronto to Seattle?

Best airlines flying from Toronto to Seattle

Compare and see reviews for airlines that fly from Toronto to Seattle with momondo

Alaska Airlines Flights From Toronto to Seattle

United Airlines Flights From Toronto to Seattle

Traveling to a place near Seattle?

Why use momondo?

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

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

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

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

An easier way to manage your Seattle 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