Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Seattle to Toronto from $121

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Toronto departing on 10/6. 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

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

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

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Seattle to Toronto

Cheap round-trip flights

WestJet Logo
8:40 am - 12:22 amSEA-YYZ
12h 42m1 stop
WestJet Logo
6:45 am - 12:35 pmYYZ-SEA
8h 50m1 stop
$252WestJet
Find Deal
Wed, Oct 8 - Sun, Oct 12
WestJet Logo
2:05 pm - 5:51 amSEA-YYZ
12h 46m2 stops
WestJet Logo
8:00 am - 12:59 pmYYZ-SEA
7h 59m1 stop
$253WestJet
Find Deal
Tue, Oct 7 - Wed, Oct 15
WestJet Logo
7:05 am - 5:22 pmSEA-YYZ
7h 17m1 stop
WestJet Logo
12:00 pm - 7:21 pmYYZ-SEA
10h 21m2 stops
$254WestJet
Find Deal
Tue, Oct 7 - Sat, Oct 18
Air Canada Logo
8:15 am - 3:58 pmSEA-YYZ
4h 43mnonstop
Air Canada Logo
7:50 pm - 10:16 pmYYZ-SEA
5h 26mnonstop
$258Air Canada
Find Deal
Sat, Nov 1 - Sun, Nov 16
Air Canada Logo
2:55 pm - 7:00 amSEA-YYZ
13h 05m2 stops
Air Canada Logo
10:25 am - 6:36 pmYYZ-SEA
11h 11m2 stops
$260Air Canada
Find Deal
Mon, Oct 6 - Tue, Oct 7
Multiple Airlines Logo
7:55 am - 3:35 pmSEA-YYZ
4h 40mnonstop
Multiple Airlines Logo
7:45 am - 2:20 pmYYZ-SEA
9h 35m1 stop
$263Multiple Airlines
Find Deal
Fri, Oct 31 - Mon, Nov 3
Multiple Airlines Logo
6:12 pm - 5:51 amSEA-YYZ
8h 39m1 stop
Multiple Airlines Logo
8:00 am - 12:59 pmYYZ-SEA
7h 59m1 stop
$265Multiple Airlines
Find Deal
Fri, Oct 10 - Wed, Oct 22
Alaska Airlines Logo
7:55 am - 3:35 pmSEA-YYZ
4h 40mnonstop
Alaska Airlines Logo
4:45 pm - 7:05 pmYYZ-SEA
5h 20mnonstop
$273Alaska Airlines
Find Deal
Sun, Nov 9 - Thu, Nov 13
United Airlines Logo
11:40 pm - 9:58 amSEA-YYZ
7h 18m1 stop
United Airlines Logo
12:45 pm - 8:44 pmYYZ-SEA
10h 59m1 stop
$274United Airlines
Find Deal
Mon, Oct 6 - Tue, Oct 7
United Airlines Logo
10:35 pm - 9:58 amSEA-YYZ
8h 23m1 stop
United Airlines Logo
2:30 pm - 8:44 pmYYZ-SEA
9h 14m1 stop
$276United Airlines
Find Deal
Tue, Oct 7 - Sat, Oct 18

WestJet flights from Seattle to Toronto Pearson Intl Airport

Our best WestJet deals on Seattle to Toronto Pearson Intl Airport flight tickets
WestJet
Oct 8
SEA8:40 amSeattle/Tacoma Intl
12h 42m
1 stop
YYZ12:22 amToronto Pearson Intl
Oct 12
YYZ6:45 amToronto Pearson Intl
8h 50m
1 stop
SEA12:35 pmSeattle/Tacoma Intl
$252
Find similar
WestJet
Oct 7
SEA2:05 pmSeattle/Tacoma Intl
12h 46m
2 stops
YYZ5:51 amToronto Pearson Intl
Oct 15
YYZ8:00 amToronto Pearson Intl
7h 59m
1 stop
SEA12:59 pmSeattle/Tacoma Intl
$253
Find similar
WestJet
Oct 7
SEA7:05 amSeattle/Tacoma Intl
7h 17m
1 stop
YYZ5:22 pmToronto Pearson Intl
Oct 18
YYZ12:00 pmToronto Pearson Intl
10h 21m
2 stops
SEA7:21 pmSeattle/Tacoma Intl
$254
Find similar

United Airlines flights from Seattle to Toronto Pearson Intl Airport

Our best United Airlines deals on Seattle to Toronto Pearson Intl Airport flight tickets
United Airlines
Oct 6
SEA11:40 pmSeattle/Tacoma Intl
7h 18m
1 stop
YYZ9:58 amToronto Pearson Intl
Oct 7
YYZ12:45 pmToronto Pearson Intl
10h 59m
1 stop
SEA8:44 pmSeattle/Tacoma Intl
$274
Find similar
United Airlines
Oct 7
SEA10:35 pmSeattle/Tacoma Intl
8h 23m
1 stop
YYZ9:58 amToronto Pearson Intl
Oct 18
YYZ2:30 pmToronto Pearson Intl
9h 14m
1 stop
SEA8:44 pmSeattle/Tacoma Intl
$276
Find similar
United Airlines
Oct 11
SEA12:43 pmSeattle/Tacoma Intl
7h 05m
1 stop
YYZ10:48 pmToronto Pearson Intl
Oct 14
YYZ6:10 amToronto Pearson Intl
20h 05m
1 stop
SEA11:15 pmSeattle/Tacoma Intl
$287
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Toronto Pearson Intl Airport 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 17, 2025.
Use the filters below to find and compare flights from Seattle to Toronto Pearson Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Wed 10/8

8:40 am-12:22 am

1 stop12h 42m

Toronto Pearson Intl

Sun 10/12

6:45 am-12:35 pm

1 stop8h 50m

$252

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Tue 10/7

2:05 pm-5:51 am

2 stops12h 46m

Toronto Pearson Intl

Wed 10/15

8:00 am-12:59 pm

1 stop7h 59m

$253

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Tue 10/7

7:05 am-5:22 pm

1 stop7h 17m

Toronto Pearson Intl

Sat 10/18

12:00 pm-7:21 pm

2 stops10h 21m

$254

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Sat 11/1

8:15 am-3:58 pm

Nonstop4h 43m

Toronto Pearson Intl

Sun 11/16

7:50 pm-10:16 pm

Nonstop5h 26m

$258

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Mon 10/6

2:55 pm-7:00 am

2 stops13h 05m

Toronto Pearson Intl

Tue 10/7

10:25 am-6:36 pm

2 stops11h 11m

$260

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Fri 10/31

7:55 am-3:35 pm

Nonstop4h 40m

Toronto Pearson Intl

Mon 11/3

7:45 am-2:20 pm

1 stop9h 35m

$263

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Fri 10/10

6:12 pm-5:51 am

1 stop8h 39m

Toronto Pearson Intl

Wed 10/22

8:00 am-12:59 pm

1 stop7h 59m

$265

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Sun 11/9

7:55 am-3:35 pm

Nonstop4h 40m

Toronto Pearson Intl

Thu 11/13

4:45 pm-7:05 pm

Nonstop5h 20m

$273

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Mon 10/6

11:40 pm-9:58 am

1 stop7h 18m

Toronto Pearson Intl

Tue 10/7

12:45 pm-8:44 pm

1 stop10h 59m

$274

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Tue 10/7

10:35 pm-9:58 am

1 stop8h 23m

Toronto Pearson Intl

Sat 10/18

2:30 pm-8:44 pm

1 stop9h 14m

$276

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to Toronto from

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

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 Toronto Pearson Intl Airport?

The cheapest month to fly to Toronto Pearson Intl Airport from Seattle is in January. Flight prices, which tend to average around $304, are often lower during this time because this is during the off-season. If you don’t want to visit Toronto Pearson Intl Airport in January, then you should wait until March to fly from Seattle, when ticket prices are also cheap, with an average price of $316.

What is the cheapest day to depart on your flight to Toronto Pearson Intl Airport?

The cheapest day to depart from Seattle to Toronto Pearson Intl Airport is on a Tuesday when prices can be found for as low as $549. The most expensive day to fly to Toronto Pearson Intl Airport is Saturday, with ticket prices averaging around $703.

What is the cheapest time of day to depart on your flight to Toronto Pearson Intl Airport?

Flying to Toronto Pearson Intl Airport from Seattle in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $284 when looking at flights departing in the afternoon. Flights in the evening are often more expensive with an average ticket price of $627.

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

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

How far in advance should I book a flight to Toronto Pearson Intl Airport?

You are more likely to see cheaper flights to Toronto Pearson Intl Airport from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Toronto Pearson Intl Airport for around $423 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Toronto Pearson Intl Airport from Seattle for as low as $292 on momondo.

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

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

You could potentially save up to 27% on your flight if you consider stops on a Seattle to Toronto Pearson Intl Airport flight.

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

As of September 2025, prices for Seattle to Toronto Pearson Intl Airport flights are approximately 53% cheaper when compared to flights at the same time last year.

When to book flights from Seattle to Toronto Pearson Intl Airport

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

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

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

Best Price Found

$139

Fastest flight time

4h 35m

Direct flights

Every day
The best one-way flight to Toronto Pearson Intl Airport from Seattle in the past 72 hours is $139. The best round-trip flight deal from Seattle to Toronto Pearson Intl Airport found on momondo in the last 72 hours is $374.
The fastest flight from Seattle to Toronto Pearson Intl Airport takes 4h 35m
Direct flights go from Seattle to Toronto Pearson Intl Airport every day.
Search flight deals

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

    Seattle/Tacoma Intl and Toronto Pearson Intl are 2053.4 mi apart from one another. Flights usually cover this in 4h 40m, depending on flying conditions and air traffic around both airports.

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

    Prices for flights from Seattle/Tacoma Intl Airport to Toronto Pearson Intl Airport are updated daily.

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

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to Toronto Pearson 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 Seattle/Tacoma Intl Airport to Toronto Pearson Intl Airport.

  • What documentation or ID do you need to fly to Toronto Pearson Intl Airport?

    The travel and health documents you'll need for your trip to Toronto Pearson Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Toronto Pearson Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Seattle to Toronto Pearson Intl Airport?

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

Best airlines flying from Seattle to Toronto Pearson Intl Airport

Compare and see reviews for airlines that fly from Seattle to Toronto Pearson Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
Air CanadaPriceFrom $128Free CancellationRating
7.1
10,000 reviews
Search Air Canada flights
United AirlinesPriceFrom $173Free CancellationRating
7.4
8,926 reviews
Search United Airlines flights
DeltaPriceFrom $186Free CancellationRating
7.9
7,961 reviews
Search Delta flights
WestJetPriceFrom $235Free CancellationRating
7.2
3,095 reviews
Search WestJet flights
Alaska AirlinesPriceFrom $276Free CancellationRating
8.0
10,000 reviews
Search Alaska Airlines flights

  • Alaska Airlines Flights From Seattle to Toronto Pearson Intl Airport

    Alaska Airlines operates around 4 flights from Seattle to Toronto Pearson Intl Airport every week. The average price of these flights found in the last 72 hours has been $500, but momondo users have found Alaska Airlines deals from Seattle to Toronto Pearson Intl Airport from as low as $276 round-trip. Alaska Airlines has been scored 8.0/10 in 10,000 reviews.

  • United Airlines Flights From Seattle to Toronto Pearson Intl Airport

    The best United Airlines deal for Seattle to Toronto Pearson Intl Airport flight tickets found on momondo in the last 72 hours was $173, round-trip. It should be noted that an average United Airlines flight deal for this route in this time was higher, at $391 round-trip. United Airlines operates 7 flights out of Seattle into Toronto Pearson Intl Airport in an average week, so prices vary by time and availability. 8,926 United Airlines reviews by users on momondo have scored the airline at 7.4/10.

Traveling to a place near Toronto?

Book flights to Toronto if you plan to visit one of these locations
Niagara Falls
Mississauga
Niagara-on-the-Lake
Brampton
Vaughan
Markham
Oakville
Richmond Hill
Kitchener
Cambridge
Barrie
Guelph
Burlington
St. Catharines
Milton
Collingwood
Peterborough
Brantford
Oshawa
Ajax

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Toronto?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Seattle to Toronto. momondo saves you time and could save you money on your trip.

Can I find flights from Seattle to Toronto with flexible booking policies on momondo?

All flight searches from Seattle to Toronto on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Seattle to Toronto?

Once all potential Seattle to Toronto flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Seattle to Toronto right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Seattle to Toronto flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

An easier way to manage your Toronto Pearson Intl Airport 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
Fri 10/17
Fri 10/24
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Toronto

Popular cities in Canada

Popular flights according to clicks in the last 7 days on momondo
Flights to Toronto Island Airportfrom $172
Flights to Montreal Pierre Elliott Trudeau Intl Airportfrom $183
Flights to Vancouver Intl Airport
Flights to Toronto Region of Waterloo Intl Airportfrom $195