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Cheap flights from Toronto to Seattle from $83

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 5/13. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Toronto to Seattle

Cheap round-trip flights

KAYAK's recommended round-trip deals from the most popular airlines that fly from Toronto to Seattle.
WestJet Logo
6:00 am - 12:58 pmYKF-SEA
9h 58m1 stop
WestJet Logo
1:50 pm - 12:46 amSEA-YKF
7h 56m1 stop
$140WestJet
Find Deal
Wed, May 21 - Wed, May 28
WestJet Logo
6:00 am - 12:58 pmYHM-SEA
9h 58m1 stop
WestJet Logo
1:50 pm - 12:41 amSEA-YHM
7h 51m1 stop
$160WestJet
Find Deal
Sat, May 24 - Fri, May 30
Air Canada Logo
8:25 am - 10:45 amYYZ-SEA
5h 20mnonstop
Air Canada Logo
1:45 pm - 1:09 amSEA-YYZ
8h 24m1 stop
$236Air Canada
Find Deal
Tue, May 27 - Tue, Jun 3
Air Canada Logo
12:25 pm - 7:37 pmYTZ-SEA
10h 12m1 stop
Air Canada Logo
7:20 am - 7:50 pmSEA-YTZ
9h 30m1 stop
$241Air Canada
Find Deal
Sat, May 24 - Fri, May 30
Alaska Airlines Logo
4:45 pm - 7:04 pmYYZ-SEA
5h 19mnonstop
Alaska Airlines Logo
7:23 am - 3:00 pmSEA-YYZ
4h 37mnonstop
$269Alaska Airlines
Find Deal
Thu, May 29 - Mon, Jun 2
Alaska Airlines Logo
4:45 pm - 7:04 pmYYZ-SEA
5h 19mnonstop
Alaska Airlines Logo
7:23 am - 3:00 pmSEA-YYZ
4h 37mnonstop
$281Alaska Airlines
Find Deal
Wed, May 21 - Wed, May 28
Delta Logo
3:59 pm - 8:30 pmYYZ-SEA
7h 31m1 stop
Delta Logo
5:45 am - 4:46 pmSEA-YYZ
8h 01m1 stop
$282Delta
Find Deal
Wed, Sep 17 - Tue, Sep 23
United Airlines Logo
8:30 am - 10:51 amYYZ-SEA
5h 21mnonstop
United Airlines Logo
11:22 pm - 10:46 amSEA-YYZ
8h 24m1 stop
$283United Airlines
Find Deal
Tue, Jun 10 - Mon, Jun 16
Delta Logo
5:50 pm - 10:25 pmYYZ-SEA
7h 35m1 stop
Delta Logo
9:58 pm - 11:20 amSEA-YYZ
10h 22m1 stop
$289Delta
Find Deal
Thu, Jun 12 - Sun, Jun 15
United Airlines Logo
8:25 am - 10:45 amYYZ-SEA
5h 20mnonstop
United Airlines Logo
11:50 pm - 11:49 amSEA-YYZ
8h 59m1 stop
$291United Airlines
Find Deal
Sun, May 25 - Sun, Jun 1

Alaska Airlines flights from Toronto to Seattle

Our best Alaska Airlines deals on Toronto to Seattle flight tickets
Alaska Airlines
May 29
YYZ4:45 pmToronto Pearson Intl
5h 19m
SEA7:04 pmSeattle/Tacoma Intl
Jun 2
SEA7:23 amSeattle/Tacoma Intl
4h 37m
YYZ3:00 pmToronto Pearson Intl
Alaska Airlines
May 21
YYZ4:45 pmToronto Pearson Intl
5h 19m
SEA7:04 pmSeattle/Tacoma Intl
May 28
SEA7:23 amSeattle/Tacoma Intl
4h 37m
YYZ3:00 pmToronto Pearson Intl
Alaska Airlines
May 22
YYZ4:45 pmToronto Pearson Intl
5h 19m
SEA7:04 pmSeattle/Tacoma Intl
May 29
SEA7:23 amSeattle/Tacoma Intl
4h 37m
YYZ3:00 pmToronto Pearson Intl

Air Canada flights from Toronto to Seattle

Our best Air Canada deals on Toronto to Seattle flight tickets
Air Canada
May 27
YYZ8:25 amToronto Pearson Intl
5h 20m
SEA10:45 amSeattle/Tacoma Intl
Jun 3
SEA1:45 pmSeattle/Tacoma Intl
8h 24m
1 stop
YYZ1:09 amToronto Pearson Intl
Air Canada
May 24
YTZ12:25 pmToronto Island
10h 12m
1 stop
SEA7:37 pmSeattle/Tacoma Intl
May 30
SEA7:20 amSeattle/Tacoma Intl
9h 30m
1 stop
YTZ7:50 pmToronto Island
Air Canada
Jun 10
YYZ9:05 amToronto Pearson Intl
8h 08m
1 stop
SEA2:13 pmSeattle/Tacoma Intl
Jun 14
SEA7:20 amSeattle/Tacoma Intl
9h 28m
1 stop
YYZ7:48 pmToronto Pearson Intl

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 typical price of a round-trip flight between Toronto and Seattle?

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 $264. 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 Wednesday. momondo users have found tickets for Wednesday departures for as low as $401. 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 $580.

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 $371 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 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 7 weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $374 when searching 7 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 $325 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.

How have Toronto to Seattle flight prices changed over time?

As of April 2025, prices for Toronto to Seattle flights are approximately 7% 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

$83

Fastest flight time

5h 14m

Direct flights

Every day

Airports in Seattle

1 airport
The best one-way flight to Seattle from Toronto in the past 72 hours is $83. The best round-trip flight deal from Toronto to Seattle found on momondo in the last 72 hours is $140.
The fastest flight from Toronto to Seattle takes 5h 14m
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 14m 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 $141Free CancellationRating
7.2
2,816 reviews
Search WestJet flights
Alaska AirlinesPriceFrom $239Free CancellationRating
8.0
9,918 reviews
Search Alaska Airlines flights
United AirlinesPriceFrom $240Free CancellationRating
7.4
8,685 reviews
Search United Airlines flights
Air CanadaPriceFrom $250Free CancellationRating
7.0
9,198 reviews
Search Air Canada flights
DeltaPriceFrom $292Free CancellationRating
8.0
7,920 reviews
Search Delta flights
American AirlinesPriceFrom $393Free CancellationRating
7.2
10,000 reviews
Search American Airlines 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 $239 round-trip, up to an average price of $414. 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 $417 round-trip. United Airlines operates 7 flights out of Toronto into Seattle in an average week, so prices vary by time and availability. 8,685 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
Kent
Renton
Federal Way
Tukwila
Puyallup
Kirkland
Lakewood
Lynnwood
Fife
Shoreline
Marysville
Centralia
Redmond
Cle Elum
Lacey

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.


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