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

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

What 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 37% 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.

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 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 which experiences the fewest number of delays on this flight route. Thursday has historically seen more delays on average compared to the rest of the week.

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 19 per week as of December 2025. The most frequent departure day is Wed, with 37% of weekly flights leaving on this day.

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.

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

As of December 2025, 2 flights take off from Toronto Pearson Intl Airport and land in Seattle each day. The most common flight departure time for this route is 4:00PM, with 64% of daily flights taking off in the afternoon.

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

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

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 were last updated today.

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

The required travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$151 Cheap Flights from Toronto Pearson Intl Airport to Seattle in 2025/26

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Cheap round-trip flights

Enter your travel dates to find the best prices.

4:45 pm - 7:18 pm

YYZ

SEA

5h 33mnonstop

7:55 am - 3:35 pm

SEA

YYZ

4h 40mnonstop

$198Alaska Airlines

Sat, Mar 7 - Tue, Mar 10

4:45 pm - 7:17 pm

YYZ

SEA

5h 32mnonstop

7:55 am - 3:35 pm

SEA

YYZ

4h 40mnonstop

$199Alaska Airlines

Tue, Jan 20 - Sat, Feb 7

4:45 pm - 7:05 pm

YYZ

SEA

5h 20mnonstop

7:55 am - 3:35 pm

SEA

YYZ

4h 40mnonstop

$200Alaska Airlines

Wed, Apr 8 - Sat, Apr 18

1:30 pm - 8:28 pm

YYZ

SEA

9h 58m1 stop

7:05 am - 9:00 pm

SEA

YYZ

10h 55m2 stops

$201WestJet

Sat, May 9 - Sun, May 17

7:45 am - 2:20 pm

YYZ

SEA

9h 35m1 stop

11:55 am - 11:38 pm

SEA

YYZ

8h 43m2 stops

$202WestJet

Thu, Jan 22 - Fri, Feb 6

4:45 pm - 7:18 pm

YYZ

SEA

5h 33mnonstop

11:55 am - 12:08 am

SEA

YYZ

9h 13m2 stops

$203Multiple Airlines

Thu, Mar 5 - Sun, Mar 8

8:45 pm - 10:22 am

YYZ

SEA

16h 37m1 stop

11:55 am - 11:39 pm

SEA

YYZ

8h 44m2 stops

$204WestJet

Thu, Jan 8 - Sat, Jan 10

4:45 pm - 7:05 pm

YYZ

SEA

5h 20mnonstop

7:55 am - 3:35 pm

SEA

YYZ

4h 40mnonstop

$205Alaska Airlines

Wed, Apr 8 - Fri, Apr 17

4:45 pm - 7:05 pm

YYZ

SEA

5h 20mnonstop

7:55 am - 3:35 pm

SEA

YYZ

4h 40mnonstop

$206Alaska Airlines

Wed, Apr 8 - Thu, Apr 16

7:45 am - 2:19 pm

YYZ

SEA

9h 34m1 stop

11:55 am - 11:38 pm

SEA

YYZ

8h 43m2 stops

$207WestJet

Mon, Apr 13 - Fri, Apr 17

Alaska Airlines flights from Toronto Pearson Intl Airport to Seattle

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

Alaska Airlines

Mar 7

YYZ4:45 pmToronto Pearson Intl

5h 33m

SEA7:18 pmSeattle/Tacoma Intl

Mar 11

SEA7:55 amSeattle/Tacoma Intl

4h 40m

YYZ3:35 pmToronto Pearson Intl

$198

Find similar

Alaska Airlines

Jan 20

YYZ4:45 pmToronto Pearson Intl

5h 32m

SEA7:17 pmSeattle/Tacoma Intl

Feb 4

SEA7:55 amSeattle/Tacoma Intl

4h 40m

YYZ3:35 pmToronto Pearson Intl

$199

Find similar

Alaska Airlines

Apr 8

YYZ4:45 pmToronto Pearson Intl

5h 20m

SEA7:05 pmSeattle/Tacoma Intl

Apr 15

SEA7:55 amSeattle/Tacoma Intl

4h 40m

YYZ3:35 pmToronto Pearson Intl

$200

Find similar

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

Jan 30

YYZ7:50 pmToronto Pearson Intl

5h 26m

SEA10:16 pmSeattle/Tacoma Intl

Feb 6

SEA8:10 amSeattle/Tacoma Intl

4h 43m

YYZ3:53 pmToronto Pearson Intl

$222

Find similar

Air Canada

Jan 24

YYZ7:50 pmToronto Pearson Intl

5h 26m

SEA10:16 pmSeattle/Tacoma Intl

Jan 31

SEA5:50 amSeattle/Tacoma Intl

12h 54m

2 stops

YYZ9:44 pmToronto Pearson Intl

$225

Find similar

Air Canada

Jan 14

YYZ7:50 pmToronto Pearson Intl

5h 26m

SEA10:16 pmSeattle/Tacoma Intl

Jan 18

SEA8:00 pmSeattle/Tacoma Intl

7h 15m

1 stop

YYZ6:15 amToronto Pearson Intl

$232

Find similar

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 3/7

4:45 pm-7:18 pm

Nonstop5h 33m

Seattle/Tacoma Intl

Tue 3/10

7:55 am-3:35 pm

Nonstop4h 40m

$198

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Tue 1/20

4:45 pm-7:17 pm

Nonstop5h 32m

Seattle/Tacoma Intl

Sat 2/7

7:55 am-3:35 pm

Nonstop4h 40m

$199

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 4/8

4:45 pm-7:05 pm

Nonstop5h 20m

Seattle/Tacoma Intl

Sat 4/18

7:55 am-3:35 pm

Nonstop4h 40m

$200

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sat 5/9

1:30 pm-8:28 pm

1 stop9h 58m

Seattle/Tacoma Intl

Sun 5/17

7:05 am-9:00 pm

2 stops10h 55m

$201

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Thu 1/22

7:45 am-2:20 pm

1 stop9h 35m

Seattle/Tacoma Intl

Fri 2/6

11:55 am-11:38 pm

2 stops8h 43m

$202

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Thu 3/5

4:45 pm-7:18 pm

Nonstop5h 33m

Seattle/Tacoma Intl

Sun 3/8

11:55 am-12:08 am

2 stops9h 13m

$203

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Thu 1/8

8:45 pm-10:22 am

1 stop16h 37m

Seattle/Tacoma Intl

Sat 1/10

11:55 am-11:39 pm

2 stops8h 44m

$204

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 4/8

4:45 pm-7:05 pm

Nonstop5h 20m

Seattle/Tacoma Intl

Fri 4/17

7:55 am-3:35 pm

Nonstop4h 40m

$205

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 4/8

4:45 pm-7:05 pm

Nonstop5h 20m

Seattle/Tacoma Intl

Thu 4/16

7:55 am-3:35 pm

Nonstop4h 40m

$206

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Mon 4/13

7:45 am-2:19 pm

1 stop9h 34m

Seattle/Tacoma Intl

Fri 4/17

11:55 am-11:38 pm

2 stops8h 43m

$207

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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

Other information

What is the cheapest month to fly to Seattle?

In general, February is the cheapest month to fly from Toronto Pearson Intl Airport 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 Pearson Intl Airport, when ticket prices are also cheap, with an average price of $287.

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

On average, the least expensive day to fly to Seattle from Toronto Pearson Intl Airport is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as $422. 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 Pearson Intl Airport because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $682.

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

Flying to Seattle from Toronto Pearson Intl Airport in the evening is the least expensive time of day to depart. momondo users have found prices as low as $274 when looking at flights departing in the evening. Flights to Seattle are more costly in the morning, with an average ticket price of $545. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

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 $349 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 $296 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 December 2025, prices for Toronto Pearson Intl Airport to Seattle flights are approximately 36% 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	$163
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 $163. The best round-trip flight deal from Toronto Pearson Intl Airport to Seattle found on momondo in the last 72 hours is $392.

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).

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How far is Toronto Pearson Intl to Seattle/Tacoma Intl by plane?
The distance between Toronto Pearson Intl and Seattle/Tacoma Intl is about 2053.4 mi. In terms of flight time, this usually takes a little over 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 were last updated today.
How many operators does momondo search for flights from Toronto Pearson Intl Airport to Seattle/Tacoma Intl Airport?
The number of operators available for flights from Toronto Pearson Intl Airport to Seattle/Tacoma Intl Airport is 6 as of December 2025.
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 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 Pearson Intl Airport to Seattle/Tacoma Intl Airport.
What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?
The required travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
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 62.90% of all bookings. The subsequent popular models are Boeing 737 MAX 8 at 6.93%, Embraer 195 E2 at 6.57%, and Boeing 777-300ER at 3.04%.
What is the most popular airline from Toronto Pearson Intl Airport to Seattle?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Toronto Pearson Intl Airport to Seattle is Alaska Airlines (32% of total bookings). The next most popular airlines are Air Canada (29%), WestJet (14%), and United Airlines (12%).

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
WestJet	PriceFrom $193	Free Cancellation	Rating 7.2 3,203 reviews	Search WestJet flights
Alaska Airlines	PriceFrom $225	Free Cancellation	Rating 8.0 11,478 reviews	Search Alaska Airlines flights
Air Canada	PriceFrom $238	Free Cancellation	Rating 7.1 10,534 reviews	Search Air Canada flights
United Airlines	PriceFrom $240	Free Cancellation	Rating 7.4 9,092 reviews	Search United Airlines flights
American Airlines	PriceFrom $277	Free Cancellation	Rating 7.2 11,055 reviews	Search American Airlines flights
Delta	PriceFrom $289	Free Cancellation	Rating 7.9 8,008 reviews	Search Delta flights

Alaska Airlines Flights From Toronto Pearson Intl Airport to Seattle
Alaska Airlines flies from Toronto Pearson Intl Airport to Seattle around 1 time per week, with 11,478 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 $225 (round-trip), much lower than the average airfare cost of $401 for Alaska Airlines flights on this route.
United Airlines Flights From Toronto Pearson Intl Airport to Seattle
The best United Airlines deal for Toronto Pearson Intl Airport to Seattle flight tickets found on momondo in the last 72 hours was $240, round-trip. It should be noted that an average United Airlines flight deal for this route in this time was higher, at $460 round-trip. United Airlines operates 13 flights out of Toronto Pearson Intl Airport into Seattle in an average week, so prices vary by time and availability. 9,092 United Airlines reviews by users on momondo have scored the airline at 7.4/10.

Tacoma

Leavenworth

SeaTac

Ocean Shores

Renton

Olympia

Lynnwood

Kent

Marysville

Puyallup

Redmond

Tukwila

Cle Elum

Federal Way

Lakewood

Fife

Centralia

Westport

Kirkland

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 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?

Price alerts on flights to Seattle from Toronto are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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Cheap flights from Toronto Pearson Intl Airport to Seattle from $151

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Find the cheapest flights from Toronto Pearson Intl Airport to Seattle

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Alaska Airlines flights from Toronto Pearson Intl Airport to Seattle

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Air Canada flights from Toronto Pearson Intl Airport to Seattle

Our best Air Canada 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 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 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 December 2025, prices for Toronto Pearson Intl Airport to Seattle flights are approximately 36% 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?

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

What 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 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 which experiences the fewest number of 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 have had the least number of 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 day?

As of December 2025, 2 flights take off from Toronto Pearson Intl Airport and land in Seattle each day. The most common flight departure time for this route is 4:00PM, with 64% of daily flights taking off 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 19 per week as of December 2025. The most frequent departure day is Wed, with 37% 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

United Airlines Flights From Toronto Pearson Intl Airport 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

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

Find better results for your trip to the United States

Airports servicing Washington