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 airlines fly to Seattle?

Alaska Airlines, Air Canada and WestJet are the top three most popular airlines that fly to Seattle from Toronto Pearson Intl Airport according to our data. Alaska Airlines is the first choice among our users, with 40% 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.

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

Vancouver (YVR) has the shortest average layover time for this route: 1h 45m.

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

Flights via Calgary (YYC) offer the lowest average round-trip price of C$ 398.

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

Flights connecting via Vancouver (YVR) have the shortest average one-way travel time: 7h 59m.

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

The number of flights available between Toronto Pearson Intl Airport and Seattle is 5 per day as of January 2026. The most frequent departure time is 4:00p.m., with 65% 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.

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

Calgary (YYC) was the most common stop: 50% of momondo users choosing one-stop flights on this route connected there.

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 cheapest airline that flies from Toronto Pearson Intl to Seattle/Tacoma Intl?

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

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 many flights depart from Toronto Pearson Intl Airport to Seattle on average per week?

The number of flights available between Toronto Pearson Intl Airport and Seattle is 38 per week as of January 2026. The most frequent departure day is Mon, with 16% of weekly flights leaving on this day.

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

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

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$ 176 Cheap Flights from Toronto Pearson Intl Airport to Seattle in 2026

1 adult

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Early arrival? Instantly customize your results

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from Toronto Pearson Intl Airport to Seattle

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

4:45 p.m. - 7:18 p.m.

YYZ

SEA

5h 33mdirect

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

SEA

YYZ

4h 40mdirect

C$ 273Alaska Airlines

Sat, 7 Mar - Sat, 14 Mar

4:45 p.m. - 7:18 p.m.

YYZ

SEA

5h 33mdirect

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

SEA

YYZ

4h 40mdirect

C$ 275Alaska Airlines

Wed, 4 Mar - Wed, 11 Mar

4:45 p.m. - 7:18 p.m.

YYZ

SEA

5h 33mdirect

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

SEA

YYZ

4h 40mdirect

C$ 278Alaska Airlines

Sat, 7 Mar - Sat, 14 Mar

4:45 p.m. - 7:18 p.m.

YYZ

SEA

5h 33mdirect

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

SEA

YYZ

4h 40mdirect

C$ 287Alaska Airlines

Wed, 11 Mar - Sun, 15 Mar

4:45 p.m. - 7:18 p.m.

YYZ

SEA

5h 33mdirect

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

SEA

YYZ

4h 40mdirect

C$ 290Alaska Airlines

Fri, 6 Mar - Fri, 13 Mar

7:50 p.m. - 10:16 p.m.

YYZ

SEA

5h 26mdirect

8:00 a.m. - 3:43 p.m.

SEA

YYZ

4h 43mdirect

C$ 292Air Canada

Tue, 17 Feb - Tue, 24 Feb

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

YYZ

SEA

9h 34m

1 stop

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

SEA

YYZ

11h 48m

2 stops

C$ 293WestJet

Wed, 11 Mar - Mon, 16 Mar

7:50 p.m. - 10:16 p.m.

YYZ

SEA

5h 26mdirect

9:55 a.m. - 8:59 p.m.

SEA

YYZ

8h 04m

1 stop

C$ 298Air Canada

Tue, 17 Feb - Tue, 24 Feb

7:50 p.m. - 10:16 p.m.

YYZ

SEA

5h 26mdirect

8:00 a.m. - 3:43 p.m.

SEA

YYZ

4h 43mdirect

C$ 303Air Canada

Sat, 14 Feb - Sun, 22 Feb

7:50 p.m. - 10:16 p.m.

YYZ

SEA

5h 26mdirect

8:00 p.m. - 5:59 a.m.

SEA

YYZ

6h 59m

1 stop

C$ 305Air Canada

Fri, 6 Mar - Fri, 13 Mar

Air Canada flights from Toronto Pearson Intl Airport to Seattle

Our best Air Canada deals on Toronto Pearson Intl Airport to Seattle flight tickets

Air Canada

17 Feb

YYZ7:50 p.m.Toronto Pearson Intl

5h 26m

SEA10:16 p.m.Seattle/Tacoma Intl

24 Feb

SEA8:00 a.m.Seattle/Tacoma Intl

4h 43m

YYZ3:43 p.m.Toronto Pearson Intl

C$ 292

Air Canada

17 Feb

YYZ7:50 p.m.Toronto Pearson Intl

5h 26m

SEA10:16 p.m.Seattle/Tacoma Intl

24 Feb

SEA9:55 a.m.Seattle/Tacoma Intl

8h 04m

1 stop

YYZ8:59 p.m.Toronto Pearson Intl

C$ 298

Air Canada

14 Feb

YYZ7:50 p.m.Toronto Pearson Intl

5h 26m

SEA10:16 p.m.Seattle/Tacoma Intl

22 Feb

SEA8:00 a.m.Seattle/Tacoma Intl

4h 43m

YYZ3:43 p.m.Toronto Pearson Intl

C$ 303

WestJet flights from Toronto Pearson Intl Airport to Seattle

Our best WestJet deals on Toronto Pearson Intl Airport to Seattle flight tickets

WestJet

11 Mar

YYZ7:45 a.m.Toronto Pearson Intl

9h 34m

1 stop

SEA2:19 p.m.Seattle/Tacoma Intl

16 Mar

SEA3:10 p.m.Seattle/Tacoma Intl

11h 48m

2 stops

YYZ5:58 a.m.Toronto Pearson Intl

C$ 293

WestJet

12 May

YYZ9:00 a.m.Toronto Pearson Intl

14h 28m

2 stops

SEA8:28 p.m.Seattle/Tacoma Intl

22 May

SEA7:05 a.m.Seattle/Tacoma Intl

10h 55m

2 stops

YYZ9:00 p.m.Toronto Pearson Intl

C$ 307

WestJet

12 May

YYZ9:00 a.m.Toronto Pearson Intl

14h 28m

2 stops

SEA8:28 p.m.Seattle/Tacoma Intl

22 May

SEA7:05 a.m.Seattle/Tacoma Intl

8h 47m

1 stop

YYZ6:52 p.m.Toronto Pearson Intl

C$ 308

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sat 7/3

4:45 p.m.-7:18 p.m.

Nonstop5h 33m

Seattle/Tacoma Intl

Sat 14/3

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

Nonstop4h 40m

C$ 273

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 4/3

4:45 p.m.-7:18 p.m.

Nonstop5h 33m

Seattle/Tacoma Intl

Wed 11/3

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

Nonstop4h 40m

C$ 275

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sat 7/3

4:45 p.m.-7:18 p.m.

Nonstop5h 33m

Seattle/Tacoma Intl

Sat 14/3

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

Nonstop4h 40m

C$ 278

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 11/3

4:45 p.m.-7:18 p.m.

Nonstop5h 33m

Seattle/Tacoma Intl

Sun 15/3

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

Nonstop4h 40m

C$ 287

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Fri 6/3

4:45 p.m.-7:18 p.m.

Nonstop5h 33m

Seattle/Tacoma Intl

Fri 13/3

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

Nonstop4h 40m

C$ 290

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Tue 17/2

7:50 p.m.-10:16 p.m.

Nonstop5h 26m

Seattle/Tacoma Intl

Tue 24/2

8:00 a.m.-3:43 p.m.

Nonstop4h 43m

C$ 292

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 11/3

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

1 stop9h 34m

Seattle/Tacoma Intl

Mon 16/3

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

2 stops11h 48m

C$ 293

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Tue 17/2

7:50 p.m.-10:16 p.m.

Nonstop5h 26m

Seattle/Tacoma Intl

Tue 24/2

9:55 a.m.-8:59 p.m.

1 stop8h 04m

C$ 298

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sat 14/2

7:50 p.m.-10:16 p.m.

Nonstop5h 26m

Seattle/Tacoma Intl

Sun 22/2

8:00 a.m.-3:43 p.m.

Nonstop4h 43m

C$ 303

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Fri 6/3

7:50 p.m.-10:16 p.m.

Nonstop5h 26m

Seattle/Tacoma Intl

Fri 13/3

8:00 p.m.-5:59 a.m.

1 stop6h 59m

C$ 305

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 Pearson Intl Airport 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 typical price of a round-trip flight between Toronto Pearson Intl Airport and 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 March is also cheap. Prices for this month can be found on momondo for an average of C$ 416.

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$ 549. If your travel schedule is flexible, try to avoid departing on a Monday because tickets tend to average around C$ 824. 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 Pearson Intl Airport to Seattle during this time can be as low as C$ 466. Flights in the morning are often more expensive with an average ticket price of C$ 863.

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

Fly from Toronto Pearson Intl to Seattle/Tacoma Intl for the best Toronto Pearson Intl - 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 Pearson Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around C$ 482 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Toronto Pearson Intl Airport for as low as C$ 407 on momondo.

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

There are 4 cabin classes available to choose from on Toronto Pearson Intl 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 Pearson Intl Airport to Seattle flights?

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

How have Toronto Pearson Intl Airport to Seattle flight prices changed over time?

As of January 2026, prices for Toronto Pearson Intl Airport to Seattle flights are approximately 16% cheaper when compared to flights at the same time last year.

When to book flights from Toronto Pearson Intl Airport to Seattle

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

Estimated round-trip price

Cheap Toronto Pearson Intl Airport to Seattle (YYZ to SEA) flight deals and tips

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

Best price found	C$ 265
Fastest flight time	5h 20m
Direct flights	Every day
Airports in Seattle	1 airport

The best one-way flight to Seattle from Toronto Pearson Intl Airport in the past 72 hours is C$ 265. The best round-trip flight deal from Toronto Pearson Intl Airport to Seattle found on momondo in the last 72 hours is C$ 323.

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

Direct flights go from Toronto Pearson Intl Airport to Seattle every day.

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

Search flight deals

How far is Toronto Pearson Intl to Seattle/Tacoma Intl by plane?
Seattle/Tacoma Intl is 3304.6 km away from Toronto Pearson Intl. A reasonable flight in good conditions will take 5h 20m.
When did momondo last update prices for flights from Toronto Pearson Intl Airport to Seattle/Tacoma Intl Airport?
Prices for flights from Toronto Pearson Intl Airport to Seattle/Tacoma Intl Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Toronto Pearson Intl Airport to Seattle/Tacoma Intl Airport?
There are 6 operators available for flights from Toronto Pearson Intl Airport to Seattle/Tacoma Intl Airport as of January 2026.
How old do you have to be to fly from Toronto Pearson Intl Airport to Seattle/Tacoma Intl Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Toronto Pearson Intl Airport 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 Pearson Intl Airport to Seattle?
momondo data reveals that the most frequently booked plane model on the route from Toronto Pearson Intl Airport to Seattle is Airbus A220-300, representing 63.24% of all bookings. The subsequent popular models are Embraer 195 E2 at 5.83%, Boeing 737 MAX 8 at 5.60%, and Boeing 777-300ER at 4.08%.
What is the most popular airline from Toronto Pearson Intl Airport to Seattle?
Based on momondo bookings for flights between Toronto Pearson Intl Airport and Seattle, the leading airline is Alaska Airlines, making up 38% of the total bookings. Other popular airlines include Air Canada with 30%, WestJet with 18%, and United Airlines with 8%.

Best airlines flying from Toronto Pearson Intl Airport to Seattle

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

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom C$ 255	Free Cancellation	Rating 7.9 8,080 reviews	Search Delta flights
Alaska Airlines	PriceFrom C$ 273	Free Cancellation	Rating 8.0 11,761 reviews	Search Alaska Airlines flights
WestJet	PriceFrom C$ 279	Free Cancellation	Rating 7.2 3,247 reviews	Search WestJet flights
Air Canada	PriceFrom C$ 323	Free Cancellation	Rating 7.1 10,637 reviews	Search Air Canada flights
United Airlines	PriceFrom C$ 352	Free Cancellation	Rating 7.4 9,184 reviews	Search United Airlines flights
Hawaiian Airlines	PriceFrom C$ 413	Free Cancellation	Rating 7.8 2,829 reviews	Search Hawaiian Airlines flights

Alaska Airlines Flights From Toronto Pearson Intl Airport to Seattle
Alaska Airlines flies from Toronto Pearson Intl Airport to Seattle around 3 times per week, with 11,761 momondo users rating the airline 8.0/10. The cheapest Alaska Airlines deal from Toronto Pearson Intl Airport to Seattle in the last 72 hours was C$ 273 (round-trip), much lower than the average airfare cost of C$ 464 for Alaska Airlines flights on this route.
Hawaiian Airlines Flights From Toronto Pearson Intl Airport to Seattle
Hawaiian Airlines is also a popular choice for this route. Hawaiian Airlines flight deals for Toronto Pearson Intl Airport to Seattle start from as low as C$ 413 round-trip, depending on your selected dates, with average Hawaiian Airlines deals seen on momondo around C$ 466. Hawaiian Airlines operates 7 flights to Seattle from Toronto Pearson Intl Airport in an average week. Users have rated it 7.8/10 across 2,829 reviews.

Lynnwood

Leavenworth

Tacoma

Marysville

SeaTac

Redmond

Kirkland

Tukwila

Olympia

Ocean Shores

Bainbridge Island

Ellensburg

Gig Harbor

Renton

Mukilteo

Cle Elum

Centralia

Puyallup

Kent

Edmonds

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?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Seattle from Toronto.

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.

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.

Start using Trips

Find my bookings

Get notified when prices go down

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

1 adult

Thu 19/2

Thu 26/2

Email me momondo's favourite deals

By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States

Airports servicing Washington

Bellingham Airport

Wenatchee Pangborn Field Airport

Spokane Airport

Pasco Tri Cities Airport

Pullman Moscow Regional Airport

Popular Cities in the United States

Flights to Fort Lauderdalefrom C$ 157

Flights to Orlandofrom C$ 174

Flights to New Yorkfrom C$ 253

Flights to Las Vegasfrom C$ 133

Flights to Los Angelesfrom C$ 147

Flights to Miamifrom C$ 286

Flights to San Franciscofrom C$ 164

Flights to Honolulufrom C$ 373

Flights to Phoenixfrom C$ 196

Flights to Tampafrom C$ 236

Flights to Chicagofrom C$ 222

Flights to Houstonfrom C$ 271

Cheap flights from Toronto Pearson Intl Airport to Seattle from C$ 176

Big names, great deals

Big names, great deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from Toronto Pearson Intl Airport to Seattle

Cheap round-trip flights

Cheap one-way flights

Cheap last-minute flights

Cheap direct flights

Air Canada flights from Toronto Pearson Intl Airport to Seattle

Our best Air Canada deals on Toronto Pearson Intl Airport to Seattle flight tickets

WestJet flights from Toronto Pearson Intl Airport to Seattle

Our best WestJet deals on Toronto Pearson Intl Airport to Seattle flight tickets

momondo Fare Finder

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

See travel insights to Seattle from

How to get the cheapest flight ticket from Toronto Pearson Intl Airport to Seattle

What is the typical price of a round-trip flight between Toronto Pearson Intl Airport and 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 March is also cheap. Prices for this month can be found on momondo for an average of C$ 416.

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 Pearson Intl Airport to Seattle during this time can be as low as C$ 466. Flights in the morning are often more expensive with an average ticket price of C$ 863.

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

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

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

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

There are 4 cabin classes available to choose from on Toronto Pearson Intl 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 Pearson Intl Airport to Seattle flights?

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

How have Toronto Pearson Intl Airport to Seattle flight prices changed over time?

As of January 2026, prices for Toronto Pearson Intl Airport to Seattle flights are approximately 16% cheaper when compared to flights at the same time last year.

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

Alaska Airlines and WestJet are the most popular carriers operating from Toronto Pearson Intl 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 Pearson Intl Airport and Seattle?

Calgary (YYC) was the most common stop: 50% of momondo users choosing one-stop flights on this route connected there.

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

Flights via Calgary (YYC) offer the lowest average round-trip price of C$ 398.

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

Flights connecting via Vancouver (YVR) have the shortest average one-way travel time: 7h 59m.

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

Vancouver (YVR) has the shortest average layover time for this route: 1h 45m.

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

The number of flights available between Toronto Pearson Intl Airport and Seattle is 5 per day as of January 2026. The most frequent departure time is 4:00p.m., with 65% of daily flights leaving in the afternoon.

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

The number of flights available between Toronto Pearson Intl Airport and Seattle is 38 per week as of January 2026. The most frequent departure day is Mon, with 16% of weekly flights leaving on this day.

When to book flights from Toronto Pearson Intl Airport to Seattle

Cheap Toronto Pearson Intl Airport to Seattle (YYZ to SEA) flight deals and tips

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

Best price found

Fastest flight time

Direct flights

Airports in Seattle

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

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

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

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

What is the most popular airline from Toronto Pearson Intl Airport to Seattle?

Best airlines flying from Toronto Pearson Intl Airport to Seattle

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

Alaska Airlines Flights From Toronto Pearson Intl Airport to Seattle

Hawaiian Airlines Flights From Toronto Pearson Intl Airport to Seattle

Travelling to a place near Seattle?

Why use momondo?