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Cheap flights from Toronto Pearson Intl Airport to Seattle from $124

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 Pearson Intl Airport to Seattle departing on 8/20. 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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Find the cheapest flights from Toronto Pearson Intl Airport to Seattle

Cheap round-trip flights

Alaska Airlines Logo
4:45 pm - 7:08 pmYYZ-SEA
5h 23mnonstop
Alaska Airlines Logo
7:18 am - 3:00 pmSEA-YYZ
4h 42mnonstop
$149Alaska Airlines
Find Deal
Wed, Oct 1 - Wed, Oct 8
Alaska Airlines Logo
4:45 pm - 7:08 pmYYZ-SEA
5h 23mnonstop
Alaska Airlines Logo
7:18 am - 3:00 pmSEA-YYZ
4h 42mnonstop
$204Alaska Airlines
Find Deal
Tue, Oct 7 - Wed, Oct 15
Air Canada Logo
8:40 am - 10:59 amYYZ-SEA
5h 19mnonstop
Air Canada Logo
10:00 am - 8:30 pmSEA-YYZ
7h 30m1 stop
$210Air Canada
Find Deal
Wed, Oct 1 - Tue, Oct 7
Alaska Airlines Logo
4:45 pm - 7:08 pmYYZ-SEA
5h 23mnonstop
Alaska Airlines Logo
7:18 am - 3:00 pmSEA-YYZ
4h 42mnonstop
$211Alaska Airlines
Find Deal
Wed, Oct 1 - Sun, Oct 5
Air Canada Logo
8:30 am - 2:16 pmYYZ-SEA
8h 46m1 stop
Air Canada Logo
7:15 pm - 6:01 amSEA-YYZ
7h 46m1 stop
$215Air Canada
Find Deal
Tue, Sep 30 - Tue, Oct 7
Air Canada Logo
8:40 am - 10:59 amYYZ-SEA
5h 19mnonstop
Air Canada Logo
2:55 pm - 1:06 amSEA-YYZ
7h 11m1 stop
$216Air Canada
Find Deal
Wed, Oct 1 - Sun, Oct 5
Alaska Airlines Logo
4:45 pm - 7:08 pmYYZ-SEA
5h 23mnonstop
Alaska Airlines Logo
7:18 am - 3:00 pmSEA-YYZ
4h 42mnonstop
$217Alaska Airlines
Find Deal
Sat, Oct 4 - Sun, Oct 5
WestJet Logo
12:00 pm - 8:29 pmYYZ-SEA
11h 29m2 stops
WestJet Logo
1:50 pm - 5:51 amSEA-YYZ
13h 01m2 stops
$223WestJet
Find Deal
Wed, Sep 17 - Wed, Sep 24
WestJet Logo
12:00 pm - 8:29 pmYYZ-SEA
11h 29m2 stops
WestJet Logo
1:50 pm - 12:22 amSEA-YYZ
7h 32m1 stop
$224WestJet
Find Deal
Wed, Sep 17 - Wed, Sep 24
WestJet Logo
3:00 pm - 8:28 pmYYZ-SEA
8h 28m1 stop
WestJet Logo
1:50 pm - 12:22 amSEA-YYZ
7h 32m1 stop
$226WestJet
Find Deal
Wed, Aug 20 - Wed, Sep 3

WestJet flights from Toronto Pearson Intl Airport to Seattle

Our best WestJet deals on Toronto Pearson Intl Airport to Seattle flight tickets
WestJet
Sep 17
YYZ12:00 pmToronto Pearson Intl
11h 29m
2 stops
SEA8:29 pmSeattle/Tacoma Intl
Sep 24
SEA1:50 pmSeattle/Tacoma Intl
13h 01m
2 stops
YYZ5:51 amToronto Pearson Intl
$223
Find similar
WestJet
Sep 17
YYZ12:00 pmToronto Pearson Intl
11h 29m
2 stops
SEA8:29 pmSeattle/Tacoma Intl
Sep 24
SEA1:50 pmSeattle/Tacoma Intl
7h 32m
1 stop
YYZ12:22 amToronto Pearson Intl
$224
Find similar
WestJet
Aug 20
YYZ3:00 pmToronto Pearson Intl
8h 28m
1 stop
SEA8:28 pmSeattle/Tacoma Intl
Sep 3
SEA1:50 pmSeattle/Tacoma Intl
7h 32m
1 stop
YYZ12:22 amToronto Pearson Intl
$226
Find similar

Delta flights from Toronto Pearson Intl Airport to Seattle

Our best Delta deals on Toronto Pearson Intl Airport to Seattle flight tickets
Delta
Aug 14
YYZ11:33 amToronto Pearson Intl
11h 52m
1 stop
SEA8:25 pmSeattle/Tacoma Intl
Aug 24
SEA7:35 pmSeattle/Tacoma Intl
8h 17m
1 stop
YYZ6:52 amToronto Pearson Intl
$379
Find similar
Delta
Aug 13
YYZ1:30 pmToronto Pearson Intl
8h 08m
1 stop
SEA6:38 pmSeattle/Tacoma Intl
Aug 21
SEA7:05 amSeattle/Tacoma Intl
7h 17m
1 stop
YYZ5:22 pmToronto Pearson Intl
$391
Find similar
Delta
Aug 10
YYZ2:00 pmToronto Pearson Intl
10h 00m
1 stop
SEA9:00 pmSeattle/Tacoma Intl
Oct 11
SEA9:37 amSeattle/Tacoma Intl
8h 16m
1 stop
YYZ8:53 pmToronto Pearson Intl
$497
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Toronto Pearson Intl Airport to Seattle that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated July 31, 2025.
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

Wed 10/1

4:45 pm-7:08 pm

Nonstop5h 23m

Seattle/Tacoma Intl

Wed 10/8

7:18 am-3:00 pm

Nonstop4h 42m

$149

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Tue 10/7

4:45 pm-7:08 pm

Nonstop5h 23m

Seattle/Tacoma Intl

Wed 10/15

7:18 am-3:00 pm

Nonstop4h 42m

$204

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 10/1

8:40 am-10:59 am

Nonstop5h 19m

Seattle/Tacoma Intl

Tue 10/7

10:00 am-8:30 pm

1 stop7h 30m

$210

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 10/1

4:45 pm-7:08 pm

Nonstop5h 23m

Seattle/Tacoma Intl

Sun 10/5

7:18 am-3:00 pm

Nonstop4h 42m

$211

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Tue 9/30

8:30 am-2:16 pm

1 stop8h 46m

Seattle/Tacoma Intl

Tue 10/7

7:15 pm-6:01 am

1 stop7h 46m

$215

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 10/1

8:40 am-10:59 am

Nonstop5h 19m

Seattle/Tacoma Intl

Sun 10/5

2:55 pm-1:06 am

1 stop7h 11m

$216

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sat 10/4

4:45 pm-7:08 pm

Nonstop5h 23m

Seattle/Tacoma Intl

Sun 10/5

7:18 am-3:00 pm

Nonstop4h 42m

$217

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 9/17

12:00 pm-8:29 pm

2 stops11h 29m

Seattle/Tacoma Intl

Wed 9/24

1:50 pm-5:51 am

2 stops13h 01m

$223

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 9/17

12:00 pm-8:29 pm

2 stops11h 29m

Seattle/Tacoma Intl

Wed 9/24

1:50 pm-12:22 am

1 stop7h 32m

$224

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 8/20

3:00 pm-8:28 pm

1 stop8h 28m

Seattle/Tacoma Intl

Wed 9/3

1:50 pm-12:22 am

1 stop7h 32m

$226

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Seattle from

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

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?

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 $269. 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 $279.

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 Thursday. momondo users have found tickets for Thursday departures for as low as $439. 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 $649.

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 $288 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 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 $358 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 $308 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 July 2025, prices for Toronto Pearson Intl Airport to Seattle flights are approximately 24% 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

$124

Fastest flight time

5h 19m

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 $124. The best round-trip flight deal from Toronto Pearson Intl Airport to Seattle found on momondo in the last 72 hours is $149.
The fastest flight from Toronto Pearson Intl Airport to Seattle takes 5h 19m
Direct flights go from Toronto Pearson Intl Airport to Seattle every day.
There is 1 airport near Seattle: Seattle/Tacoma Intl (SEA)
Search flight deals

  • 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 19m.

  • 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?

  • 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?

  • 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
Airline
Rating
Free Cancellation
Price
WestJetPriceFrom $213Free CancellationRating
7.2
2,978 reviews
Search WestJet flights
United AirlinesPriceFrom $240Free CancellationRating
7.4
8,900 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $243Free CancellationRating
8.0
10,000 reviews
Search Alaska Airlines flights
Air CanadaPriceFrom $250Free CancellationRating
7.1
9,851 reviews
Search Air Canada flights
American AirlinesPriceFrom $277Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
DeltaPriceFrom $289Free CancellationRating
8.0
7,981 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 2 times per week, with 10,000 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 $243 (round-trip), much lower than the average airfare cost of $402 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 $448 round-trip. United Airlines operates 7 flights out of Toronto Pearson Intl Airport into Seattle in an average week, so prices vary by time and availability. 8,900 United Airlines reviews by users on momondo have scored the airline at 7.4/10.

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Leavenworth
Tacoma
SeaTac
Ocean Shores
Olympia
Renton
Kent
Federal Way
Puyallup
Lynnwood
Marysville
Tukwila
Kirkland
Lakewood
Fife
Centralia
Cle Elum
Shoreline
Westport
Redmond

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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