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

Flights via Calgary (YYC) offer the lowest average round-trip price of C$ 412.

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

The number of flights available between Toronto and Seattle is 3 per day as of January 2026. The most frequent departure time is 4:00p.m., with 58% of daily flights leaving in the afternoon.

What is the most punctual flight time for Toronto to Seattle flights?

Generally, flights departing in the early afternoon tend to experience fewer delays. Flights departing in the evening have, in the past, seen delays more frequently in comparison.

What day of the week experiences the fewest flight delays on this route?

Monday is statistically the day of the week that experiences the fewest delays on this flight route. Thursday has historically seen more delays on average compared to the rest of the week.

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

Chicago (ORD) has the shortest average layover time for this route: 0h 51m.

Which 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 39% of people opting to fly with this airline when travelling 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.

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

As of January 2026, 26 flights take off from Toronto and land in Seattle each week. The most common flight departure day for this route is Wed, with 23% of weekly flights taking off on this day.

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

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

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

Flights connecting via Minneapolis (MSP) have the shortest average one-way travel time: 7h 18m.

How often are flights from Toronto to Seattle delayed?

Historically, on average around 21% of flights between Toronto and Seattle have experienced a delay on any given week. The average delay length over the past 12 months has been 164 minutes.

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

Calgary (YYC) was the most common stop: 65% of momondo users choosing one-stop flights on this route connected there.

Which airline has the best punctuality record on Toronto to Seattle flights?

According to our data, Alaska Airlines has had the least delays on this route over the last 12 months, with about 9% of their flights experiencing any sort of delay.

How long does it take to fly to Seattle?

Flight times from Toronto to Seattle vary, but if you’re flying out of Toronto and flying into Seattle (one of the most popular routes), then the duration is 8h 18m on average. Another popular route from Toronto to Seattle is flying from Hamilton to Seattle, which will take roughly 9h 19m. Keep in mind that layovers or delays could extend your travel time.

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?

As of January 2026, there are 6 operators available to choose from 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?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Toronto to Seattle/Tacoma Intl Airport.

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

The travel and health documents required for your trip to Seattle/Tacoma Intl Airport 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 Seattle/Tacoma Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

C$ 173 Cheap Flights from Toronto to Seattle in 2026

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One-way

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7:45 a.m. - 2:19 p.m.

YYZ

SEA

9h 34m1 stop

3:10 p.m. - 12:28 p.m.

SEA

YYZ

18h 18m1 stop

C$ 256WestJet

Tue, 3 Feb - Tue, 10 Feb

4:45 p.m. - 7:17 p.m.

YYZ

SEA

5h 32mdirect

7:55 a.m. - 3:35 p.m.

SEA

YYZ

4h 40mdirect

C$ 257Alaska Airlines

Tue, 3 Feb - Sun, 8 Feb

4:45 p.m. - 7:17 p.m.

YYZ

SEA

5h 32mdirect

3:10 p.m. - 5:58 a.m.

SEA

YYZ

11h 48m2 stops

C$ 258Multiple Airlines

Thu, 22 Jan - Mon, 26 Jan

4:55 p.m. - 7:23 p.m.

YYZ

SEA

5h 28mdirect

7:05 a.m. - 6:52 p.m.

SEA

YYZ

8h 47m1 stop

C$ 261Multiple Airlines

Thu, 23 Apr - Mon, 27 Apr

7:45 a.m. - 2:19 p.m.

YYZ

SEA

9h 34m1 stop

7:55 a.m. - 3:35 p.m.

SEA

YYZ

4h 40mdirect

C$ 263Multiple Airlines

Tue, 3 Feb - Wed, 11 Feb

9:00 a.m. - 2:31 p.m.

YYZ

SEA

8h 31m1 stop

8:10 a.m. - 3:53 p.m.

SEA

YYZ

4h 43mdirect

C$ 264Air Canada

Tue, 3 Feb - Tue, 10 Feb

7:45 a.m. - 2:19 p.m.

YYZ

SEA

9h 34m1 stop

3:10 p.m. - 12:23 p.m.

SEA

YYZ

18h 13m2 stops

C$ 265WestJet

Tue, 3 Feb - Tue, 10 Feb

4:45 p.m. - 7:17 p.m.

YYZ

SEA

5h 32mdirect

8:10 a.m. - 3:53 p.m.

SEA

YYZ

4h 43mdirect

C$ 267Multiple Airlines

Thu, 22 Jan - Wed, 28 Jan

7:45 a.m. - 2:19 p.m.

YYZ

SEA

9h 34m1 stop

7:55 a.m. - 3:35 p.m.

SEA

YYZ

4h 40mdirect

C$ 268Multiple Airlines

Mon, 16 Feb - Thu, 26 Feb

10:25 a.m. - 10:51 p.m.

YTZ

SEA

15h 26m2 stops

5:50 a.m. - 6:10 p.m.

SEA

YTZ

9h 20m2 stops

C$ 340Air Canada

Tue, 3 Mar - Wed, 4 Mar

United Airlines flights from Toronto to Seattle

Our best United Airlines deals on Toronto to Seattle flight tickets

United Airlines

13 Feb

YYZ8:45 a.m.Toronto Pearson Intl

13h 18m

1 stop

SEA7:03 p.m.Seattle/Tacoma Intl

25 Feb

SEA11:59 p.m.Seattle/Tacoma Intl

13h 03m

1 stop

YYZ4:02 p.m.Toronto Pearson Intl

C$ 292

United Airlines

26 Jan

YYZ2:45 p.m.Toronto Pearson Intl

10h 58m

2 stops

SEA10:43 p.m.Seattle/Tacoma Intl

30 Jan

SEA5:00 a.m.Seattle/Tacoma Intl

11h 17m

2 stops

YYZ7:17 p.m.Toronto Pearson Intl

C$ 304

United Airlines

18 Feb

YYZ3:45 p.m.Toronto Pearson Intl

10h 15m

1 stop

SEA11:00 p.m.Seattle/Tacoma Intl

24 Feb

SEA9:00 a.m.Seattle/Tacoma Intl

11h 46m

2 stops

YYZ11:46 p.m.Toronto Pearson Intl

C$ 305

Air Canada flights from Toronto to Seattle

Our best Air Canada deals on Toronto to Seattle flight tickets

Air Canada

3 Feb

YYZ9:00 a.m.Toronto Pearson Intl

8h 31m

1 stop

SEA2:31 p.m.Seattle/Tacoma Intl

10 Feb

SEA8:10 a.m.Seattle/Tacoma Intl

4h 43m

YYZ3:53 p.m.Toronto Pearson Intl

C$ 264

Air Canada

3 Feb

YYZ9:00 a.m.Toronto Pearson Intl

8h 31m

1 stop

SEA2:31 p.m.Seattle/Tacoma Intl

10 Feb

SEA5:45 a.m.Seattle/Tacoma Intl

7h 24m

1 stop

YYZ4:09 p.m.Toronto Pearson Intl

C$ 271

Air Canada

3 Feb

YYZ8:00 a.m.Toronto Pearson Intl

9h 31m

2 stops

SEA2:31 p.m.Seattle/Tacoma Intl

10 Feb

SEA5:45 a.m.Seattle/Tacoma Intl

10h 41m

2 stops

YYZ7:26 p.m.Toronto Pearson Intl

C$ 286

Fly from

Fly to

Route

Depart

Return

Price

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Tue 3/2

7:45 a.m.-2:19 p.m.

1 stop9h 34m

Seattle/Tacoma Intl

Tue 10/2

3:10 p.m.-12:28 p.m.

1 stop18h 18m

C$ 256

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Tue 3/2

4:45 p.m.-7:17 p.m.

Nonstop5h 32m

Seattle/Tacoma Intl

Sun 8/2

7:55 a.m.-3:35 p.m.

Nonstop4h 40m

C$ 257

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Thu 22/1

4:45 p.m.-7:17 p.m.

Nonstop5h 32m

Seattle/Tacoma Intl

Mon 26/1

3:10 p.m.-5:58 a.m.

2 stops11h 48m

C$ 258

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Thu 23/4

4:55 p.m.-7:23 p.m.

Nonstop5h 28m

Seattle/Tacoma Intl

Mon 27/4

7:05 a.m.-6:52 p.m.

1 stop8h 47m

C$ 261

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Tue 3/2

7:45 a.m.-2:19 p.m.

1 stop9h 34m

Seattle/Tacoma Intl

Wed 11/2

7:55 a.m.-3:35 p.m.

Nonstop4h 40m

C$ 263

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Tue 3/2

9:00 a.m.-2:31 p.m.

1 stop8h 31m

Seattle/Tacoma Intl

Tue 10/2

8:10 a.m.-3:53 p.m.

Nonstop4h 43m

C$ 264

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Tue 3/2

7:45 a.m.-2:19 p.m.

1 stop9h 34m

Seattle/Tacoma Intl

Tue 10/2

3:10 p.m.-12:23 p.m.

2 stops18h 13m

C$ 265

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Thu 22/1

4:45 p.m.-7:17 p.m.

Nonstop5h 32m

Seattle/Tacoma Intl

Wed 28/1

8:10 a.m.-3:53 p.m.

Nonstop4h 43m

C$ 267

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Mon 16/2

7:45 a.m.-2:19 p.m.

1 stop9h 34m

Seattle/Tacoma Intl

Thu 26/2

7:55 a.m.-3:35 p.m.

Nonstop4h 40m

C$ 268

TorontoSeattle

YTZ - SEA

YTZSEA

Toronto Island

Tue 3/3

10:25 a.m.-10:51 p.m.

2 stops15h 26m

Seattle/Tacoma Intl

Wed 4/3

5:50 a.m.-6:10 p.m.

2 stops9h 20m

C$ 340

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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

Prices

Airlines

Delays

Layovers

Other information

What is the cheapest month to fly to Seattle?

If you aren’t able to travel to Seattle during the month of February, then flying in November is also cheap. Prices for this month can be found on momondo for an average of C$ 424.

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

Our data shows that Thursday is the least expensive day to fly to Seattle. Tickets to fly out on this day can be as low as C$ 541. If your travel schedule is flexible, try to avoid departing on a Monday because tickets tend to average around C$ 795. These prices are subject to change though, so be sure to set up a Price Alert for flights to Seattle.

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

Our most recent data shows that the best time of day to fly to Seattle is in the evening. Flights from Toronto to Seattle during this time can be as low as C$ 440. Flights in the morning are often more expensive with an average ticket price of C$ 855.

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 C$ 487 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 C$ 408 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?

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

How have Toronto to Seattle flight prices changed over time?

As of January 2026, prices for Toronto to Seattle flights are approximately 3% more expensive 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	C$ 250
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 C$ 250. The best round-trip flight deal from Toronto to Seattle found on momondo in the last 72 hours is C$ 312.

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

Direct flights go from Toronto to Seattle every day.

There is 1 airport in Seattle. From Toronto there are direct flights to Seattle/Tacoma Intl (SEA).

Search flight deals

How far is Toronto to Seattle/Tacoma Intl by plane?
The distance between Toronto and Seattle/Tacoma Intl is about 3323.4 km. A reasonable flight in good conditions will take 5h 20m.
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?
As of January 2026, there are 6 operators available to choose from 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?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Toronto to Seattle/Tacoma Intl Airport.
What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?
The travel and health documents required for your trip to Seattle/Tacoma Intl Airport 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 Seattle/Tacoma Intl Airport. 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 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 (61.34% of total bookings). The next most popular plane models are Boeing 737 MAX 8 (7.86%), Embraer 195 E2 (7.47%), and Boeing 737-900 Passenger/BBJ3 (winglets) (3.09%).
What is the most popular airline from Toronto to Seattle?
Based on momondo bookings for flights between Toronto and Seattle, the leading airline is Alaska Airlines, making up 31% of the total bookings. Other popular airlines include Air Canada with 31%, WestJet with 24%, and United Airlines with 9%.

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 C$ 183	Free Cancellation	Rating 7.2 3,235 reviews	Search WestJet flights
Alaska Airlines	PriceFrom C$ 278	Free Cancellation	Rating 8.0 11,672 reviews	Search Alaska Airlines flights
Air Canada	PriceFrom C$ 337	Free Cancellation	Rating 7.1 10,603 reviews	Search Air Canada flights
Delta	PriceFrom C$ 343	Free Cancellation	Rating 7.9 8,032 reviews	Search Delta flights
United Airlines	PriceFrom C$ 366	Free Cancellation	Rating 7.4 9,142 reviews	Search United Airlines flights
Hawaiian Airlines	PriceFrom C$ 411	Free Cancellation	Rating 7.8 2,824 reviews	Search Hawaiian Airlines flights

Alaska Airlines Flights From Toronto to Seattle
Alaska Airlines operates around 3 flights from Toronto to Seattle every week. The average price of these flights found in the last 72 hours has been C$ 465, but momondo users have found Alaska Airlines deals from Toronto to Seattle from as low as C$ 278 round-trip. Alaska Airlines has been scored 8.0/10 in 11,668 reviews.
Hawaiian Airlines Flights From Toronto to Seattle
Hawaiian Airlines is also a popular choice for this route. Hawaiian Airlines flight deals for Toronto to Seattle start from as low as C$ 411 round-trip, depending on your selected dates, with average Hawaiian Airlines deals seen on momondo around C$ 464. Hawaiian Airlines operates 3 flights to Seattle from Toronto in an average week. Users have rated it 7.8/10 across 2,824 reviews.

Lynnwood

Leavenworth

Tacoma

Marysville

SeaTac

Redmond

Kirkland

Tukwila

Olympia

Ocean Shores

Bainbridge Island

Ellensburg

Gig Harbor

Renton

Mukilteo

Cle Elum

Centralia

Puyallup

Federal Way

Kent

Why use momondo?

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

It is quick and easy to find Toronto to Seattle 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 Seattle that suits you.

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?

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 Toronto to Seattle.

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

If you are simply researching potential flights to Seattle, momondo offers a useful price alert feature which will track prices for flights to Seattle from Toronto and alert you when they change.

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Cheap flights from Toronto to Seattle from C$ 173

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 19/4. 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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United Airlines flights from Toronto to Seattle

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Our best Air Canada deals on Toronto to Seattle flight tickets

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How to get the cheapest flight ticket from Toronto to Seattle

What is the cheapest month to fly to Seattle?

If you aren’t able to travel to Seattle during the month of February, then flying in November is also cheap. Prices for this month can be found on momondo for an average of C$ 424.

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?

Our most recent data shows that the best time of day to fly to Seattle is in the evening. Flights from Toronto to Seattle during this time can be as low as C$ 440. Flights in the morning are often more expensive with an average ticket price of C$ 855.

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?

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

How have Toronto to Seattle flight prices changed over time?

As of January 2026, prices for Toronto to Seattle flights are approximately 3% more expensive 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 Alaska Airlines are the most popular carriers operating from Toronto to Seattle/Tacoma Intl

Which airlines fly to Seattle?

How often are flights from Toronto to Seattle delayed?

Historically, on average around 21% of flights between Toronto and Seattle have experienced a delay on any given week. The average delay length over the past 12 months has been 164 minutes.

What is the most punctual flight time for Toronto to Seattle flights?

Generally, flights departing in the early afternoon tend to experience fewer delays. Flights departing in the evening have, in the past, seen delays more frequently in comparison.

What day of the week experiences the fewest flight delays on this route?

Monday is statistically the day of the week that experiences the fewest delays on this flight route. Thursday has historically seen more delays on average compared to the rest of the week.

Which airline has the best punctuality record on Toronto to Seattle flights?

According to our data, Alaska Airlines has had the least delays on this route over the last 12 months, with about 9% of their flights experiencing any sort of delay.

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

Calgary (YYC) was the most common stop: 65% of momondo users choosing one-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 C$ 412.

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

Flights connecting via Minneapolis (MSP) have the shortest average one-way travel time: 7h 18m.

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

Chicago (ORD) has the shortest average layover time for this route: 0h 51m.

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

The number of flights available between Toronto and Seattle is 3 per day as of January 2026. The most frequent departure time is 4:00p.m., with 58% of daily flights leaving in the afternoon.

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

As of January 2026, 26 flights take off from Toronto and land in Seattle each week. The most common flight departure day for this route is Wed, with 23% of weekly 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

Hawaiian Airlines Flights From Toronto to Seattle

Travelling to a place near Seattle?