Cheap flights from Toronto to Seattle from $125

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 10/20. 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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0 bags

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Cheap round-trip flights

WestJet Logo
6:00 am - 12:59 pmYHM-SEA
9h 59m1 stop
WestJet Logo
1:50 pm - 12:40 amSEA-YHM
7h 50m1 stop
$204WestJet
Find Deal
Mi, Okt 15 - Mi, Okt 22
WestJet Logo
6:00 am - 12:59 pmYHM-SEA
9h 59m1 stop
WestJet Logo
1:50 pm - 12:40 amSEA-YHM
7h 50m1 stop
$205WestJet
Find Deal
Di, Okt 21 - Fr, Okt 24
Alaska Airlines Logo
4:45 pm - 7:18 pmYYZ-SEA
5h 33mnonstop
Alaska Airlines Logo
8:00 am - 3:35 pmSEA-YYZ
4h 35mnonstop
$217Alaska Airlines
Find Deal
Mi, Dez 10 - Mi, Feb 25
Multiple Airlines Logo
4:45 pm - 7:18 pmYYZ-SEA
5h 33mnonstop
Multiple Airlines Logo
3:10 pm - 5:58 amSEA-YYZ
11h 48m2 stops
$219Multiple Airlines
Find Deal
Sa, Dez 13 - Fr, Feb 27
Multiple Airlines Logo
7:45 am - 2:20 pmYYZ-SEA
9h 35m1 stop
Multiple Airlines Logo
8:00 am - 3:35 pmSEA-YYZ
4h 35mnonstop
$222Multiple Airlines
Find Deal
Mi, Dez 10 - Di, Feb 24
Alaska Airlines Logo
4:45 pm - 7:18 pmYYZ-SEA
5h 33mnonstop
Alaska Airlines Logo
8:00 am - 3:35 pmSEA-YYZ
4h 35mnonstop
$226Alaska Airlines
Find Deal
Mi, Dez 10 - Do, Feb 26
Air Canada Logo
12:00 pm - 7:31 pmYYZ-SEA
10h 31m1 stop
Air Canada Logo
10:00 am - 9:11 pmSEA-YYZ
8h 11m1 stop
$228Air Canada
Find Deal
Di, Okt 7 - Do, Okt 16
Air Canada Logo
6:15 am - 2:16 pmYYZ-SEA
11h 01m2 stops
Air Canada Logo
2:55 pm - 7:00 amSEA-YYZ
13h 05m2 stops
$230Air Canada
Find Deal
Di, Okt 7 - Mi, Okt 15
United Airlines Logo
11:00 am - 6:49 pmYYZ-SEA
10h 49m1 stop
United Airlines Logo
10:35 pm - 9:58 amSEA-YYZ
8h 23m1 stop
$236United Airlines
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Di, Okt 7 - Di, Okt 7
United Airlines Logo
1:00 pm - 6:49 pmYYZ-SEA
8h 49m1 stop
United Airlines Logo
10:35 pm - 9:58 amSEA-YYZ
8h 23m1 stop
$237United Airlines
Find Deal
Di, Okt 7 - Di, Okt 7

United Airlines flights from Toronto to Seattle

Our best United Airlines deals on Toronto to Seattle flight tickets
United Airlines
Oct 7
YYZ11:00 amToronto Pearson Intl
10h 49m
1 stop
SEA6:49 pmSeattle/Tacoma Intl
Oct 7
SEA10:35 pmSeattle/Tacoma Intl
8h 23m
1 stop
YYZ9:58 amToronto Pearson Intl
United Airlines
Oct 7
YYZ1:00 pmToronto Pearson Intl
8h 49m
1 stop
SEA6:49 pmSeattle/Tacoma Intl
Oct 7
SEA10:35 pmSeattle/Tacoma Intl
8h 23m
1 stop
YYZ9:58 amToronto Pearson Intl
United Airlines
Oct 7
YYZ7:00 amToronto Pearson Intl
13h 53m
3 stops
SEA5:53 pmSeattle/Tacoma Intl
Oct 11
SEA3:28 pmSeattle/Tacoma Intl
12h 32m
1 stop
YYZ7:00 amToronto Pearson Intl

Air Canada flights from Toronto to Seattle

Our best Air Canada deals on Toronto to Seattle flight tickets
Air Canada
Oct 7
YYZ12:00 pmToronto Pearson Intl
10h 31m
1 stop
SEA7:31 pmSeattle/Tacoma Intl
Oct 16
SEA10:00 amSeattle/Tacoma Intl
8h 11m
1 stop
YYZ9:11 pmToronto Pearson Intl
Air Canada
Oct 7
YYZ6:15 amToronto Pearson Intl
11h 01m
2 stops
SEA2:16 pmSeattle/Tacoma Intl
Oct 15
SEA2:55 pmSeattle/Tacoma Intl
13h 05m
2 stops
YYZ7:00 amToronto Pearson Intl
Air Canada
Oct 7
YYZ1:00 pmToronto Pearson Intl
9h 31m
1 stop
SEA7:31 pmSeattle/Tacoma Intl
Oct 11
SEA10:00 amSeattle/Tacoma Intl
10h 50m
2 stops
YYZ11:50 pmToronto Pearson Intl

momondo Fare Finder

 
Customize your flight search to find flights from Toronto 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 September 16, 2025.
Use the filters below to find and compare flights from Toronto to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

HamiltonSeattle

YHM - SEA

YHMSEA

Hamilton

Mi 10/15

6:00 am-12:59 pm

1 stop9h 59m

Seattle/Tacoma Intl

Mi 10/22

1:50 pm-12:40 am

1 stop7h 50m

$204

HamiltonSeattle

YHM - SEA

YHMSEA

Hamilton

Di 10/21

6:00 am-12:59 pm

1 stop9h 59m

Seattle/Tacoma Intl

Fr 10/24

1:50 pm-12:40 am

1 stop7h 50m

$205

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Mi 12/10

4:45 pm-7:18 pm

Nonstop5h 33m

Seattle/Tacoma Intl

Mi 2/25

8:00 am-3:35 pm

Nonstop4h 35m

$217

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sa 12/13

4:45 pm-7:18 pm

Nonstop5h 33m

Seattle/Tacoma Intl

Fr 2/27

3:10 pm-5:58 am

2 stops11h 48m

$219

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Mi 12/10

7:45 am-2:20 pm

1 stop9h 35m

Seattle/Tacoma Intl

Di 2/24

8:00 am-3:35 pm

Nonstop4h 35m

$222

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Mi 12/10

4:45 pm-7:18 pm

Nonstop5h 33m

Seattle/Tacoma Intl

Do 2/26

8:00 am-3:35 pm

Nonstop4h 35m

$226

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Di 10/7

12:00 pm-7:31 pm

1 stop10h 31m

Seattle/Tacoma Intl

Do 10/16

10:00 am-9:11 pm

1 stop8h 11m

$228

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Di 10/7

6:15 am-2:16 pm

2 stops11h 01m

Seattle/Tacoma Intl

Mi 10/15

2:55 pm-7:00 am

2 stops13h 05m

$230

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Di 10/7

11:00 am-6:49 pm

1 stop10h 49m

Seattle/Tacoma Intl

Di 10/7

10:35 pm-9:58 am

1 stop8h 23m

$236

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Di 10/7

1:00 pm-6:49 pm

1 stop8h 49m

Seattle/Tacoma Intl

Di 10/7

10:35 pm-9:58 am

1 stop8h 23m

$237

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 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 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 Thursday. momondo users have found tickets for Thursday departures for as low as $432. 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 in the morning, with an average ticket price of $547. 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 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 $359 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 $306 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 48% 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 September 2025, prices for Toronto to Seattle flights are approximately 23% 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

$296

Fastest flight time

5h 15m

Direct flights

Every day

Airports in Seattle

1 airport
The best one-way flight to Seattle from Toronto in the past 72 hours is $296. The best round-trip flight deal from Toronto to Seattle found on momondo in the last 72 hours is $312.
The fastest flight from Toronto to Seattle takes 5h 15m
Direct flights go from Toronto to Seattle every day.
There is 1 airport near Seattle: Seattle/Tacoma Intl (SEA)
  • 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 33m 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?

  • 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?

  • 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
Airline
Rating
Free Cancellation
Price
WestJetPriceFrom $193Free CancellationRating
7.2
3,093 reviews
Search WestJet flights
United AirlinesPriceFrom $240Free CancellationRating
7.4
8,924 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $246Free CancellationRating
8.0
10,000 reviews
Search Alaska Airlines flights
Air CanadaPriceFrom $247Free CancellationRating
7.1
10,000 reviews
Search Air Canada flights
American AirlinesPriceFrom $277Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
DeltaPriceFrom $289Free CancellationRating
7.9
7,957 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 3 flights/week on average for this route. A good Alaska Airlines flight deal for Toronto to Seattle starts from $246 round-trip, up to an average price of $376. 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 $240, round-trip. It should be noted that an average United Airlines flight deal for this route in this time was higher, at $459 round-trip. United Airlines operates 7 flights out of Toronto into Seattle in an average week, so prices vary by time and availability. 8,924 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
Renton
Olympia
Lynnwood
Kent
Marysville
Puyallup
Federal Way
Kirkland
Tukwila
Shoreline
Lakewood
Centralia
Fife
Cle Elum
Redmond
Westport

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.

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.

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1 adult
Do 10/16
Do 10/23

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