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Cheap flights from Seattle to Toronto from $103

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 2/22. 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

Enter your travel dates to find the best prices.
Multiple Airlines Logo
11:55 am - 11:38 pm
SEA
-
YYZ
8h 43m2 stops
Multiple Airlines Logo
4:45 pm - 7:18 pm
YYZ
-
SEA
5h 33mnonstop
$245Multiple Airlines
Fri, Feb 27 - Fri, Mar 6
WestJet Logo
7:05 am - 6:52 pm
SEA
-
YYZ
8h 47m1 stop
WestJet Logo
6:30 am - 1:08 pm
YYZ
-
SEA
9h 38m1 stop
$246WestJet
Mon, May 25 - Fri, May 29
Alaska Airlines Logo
7:55 am - 3:35 pm
SEA
-
YYZ
4h 40mnonstop
Alaska Airlines Logo
4:45 pm - 7:18 pm
YYZ
-
SEA
5h 33mnonstop
$247Alaska Airlines
Sun, Feb 22 - Fri, Mar 6
WestJet Logo
3:10 pm - 5:58 am
SEA
-
YYZ
11h 48m2 stops
WestJet Logo
6:45 am - 1:08 pm
YYZ
-
SEA
9h 23m2 stops
$248WestJet
Fri, Apr 24 - Mon, Apr 27
WestJet Logo
3:35 pm - 5:50 am
SEA
-
YYZ
11h 15m2 stops
WestJet Logo
12:00 pm - 8:28 pm
YYZ
-
SEA
11h 28m2 stops
$249WestJet
Sun, Apr 26 - Fri, May 1
Multiple Airlines Logo
3:10 pm - 6:58 am
SEA
-
YYZ
12h 48m2 stops
Multiple Airlines Logo
4:45 pm - 7:05 pm
YYZ
-
SEA
5h 20mnonstop
$250Multiple Airlines
Tue, Mar 17 - Mon, Mar 23
WestJet Logo
7:05 am - 5:22 pm
SEA
-
YYZ
7h 17m1 stop
WestJet Logo
12:00 pm - 8:28 pm
YYZ
-
SEA
11h 28m2 stops
$251WestJet
Mon, May 25 - Fri, May 29
WestJet Logo
3:10 pm - 5:29 am
SEA
-
YKF
11h 19m1 stop
WestJet Logo
7:00 pm - 2:19 pm
YKF
-
SEA
22h 19m1 stop
$251WestJet
Wed, Mar 11 - Sat, Mar 14
Air Canada Logo
8:10 am - 3:53 pm
SEA
-
YYZ
4h 43mnonstop
Air Canada Logo
7:50 pm - 10:16 pm
YYZ
-
SEA
5h 26mnonstop
$252Air Canada
Wed, Feb 18 - Wed, Feb 18
Air Canada Logo
8:00 pm - 5:59 am
SEA
-
YYZ
6h 59m1 stop
Air Canada Logo
8:05 am - 2:31 pm
YYZ
-
SEA
9h 26m2 stops
$254Air Canada
Fri, Jan 9 - Sat, Jan 10

WestJet flights from Seattle to Toronto

Our best WestJet deals on Seattle to Toronto flight tickets
WestJet
May 25
SEA7:05 amSeattle/Tacoma Intl
8h 47m
1 stop
YYZ6:52 pmToronto Pearson Intl
May 29
YYZ6:30 amToronto Pearson Intl
9h 38m
1 stop
SEA1:08 pmSeattle/Tacoma Intl
$246
Find similar
WestJet
Apr 24
SEA3:10 pmSeattle/Tacoma Intl
11h 48m
2 stops
YYZ5:58 amToronto Pearson Intl
Apr 29
YYZ12:00 pmToronto Pearson Intl
11h 28m
2 stops
SEA8:28 pmSeattle/Tacoma Intl
$248
Find similar
WestJet
Apr 26
SEA3:35 pmSeattle/Tacoma Intl
11h 15m
2 stops
YYZ5:50 amToronto Pearson Intl
May 1
YYZ12:00 pmToronto Pearson Intl
11h 28m
2 stops
SEA8:28 pmSeattle/Tacoma Intl
$249
Find similar

Alaska Airlines flights from Seattle to Toronto

Our best Alaska Airlines deals on Seattle to Toronto flight tickets
Alaska Airlines
Feb 22
SEA7:55 amSeattle/Tacoma Intl
4h 40m
YYZ3:35 pmToronto Pearson Intl
Mar 5
YYZ4:45 pmToronto Pearson Intl
5h 33m
SEA7:18 pmSeattle/Tacoma Intl
$247
Find similar
Alaska Airlines
Apr 25
SEA7:55 amSeattle/Tacoma Intl
4h 40m
YYZ3:35 pmToronto Pearson Intl
Apr 29
YYZ4:45 pmToronto Pearson Intl
5h 20m
SEA7:05 pmSeattle/Tacoma Intl
$296
Find similar
Alaska Airlines
Dec 30
SEA8:00 amSeattle/Tacoma Intl
4h 35m
YYZ3:35 pmToronto Pearson Intl
Jan 9
YYZ4:45 pmToronto Pearson Intl
5h 32m
SEA7:17 pmSeattle/Tacoma Intl
$594
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Toronto 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 December 18, 2025.
Use the filters below to find and compare flights from Seattle to Toronto that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Fri 2/27

11:55 am-11:38 pm

2 stops8h 43m

Toronto Pearson Intl

Fri 3/6

4:45 pm-7:18 pm

Nonstop5h 33m

$245

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Mon 5/25

7:05 am-6:52 pm

1 stop8h 47m

Toronto Pearson Intl

Fri 5/29

6:30 am-1:08 pm

1 stop9h 38m

$246

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Sun 2/22

7:55 am-3:35 pm

Nonstop4h 40m

Toronto Pearson Intl

Fri 3/6

4:45 pm-7:18 pm

Nonstop5h 33m

$247

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Fri 4/24

3:10 pm-5:58 am

2 stops11h 48m

Toronto Pearson Intl

Mon 4/27

6:45 am-1:08 pm

2 stops9h 23m

$248

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Sun 4/26

3:35 pm-5:50 am

2 stops11h 15m

Toronto Pearson Intl

Fri 5/1

12:00 pm-8:28 pm

2 stops11h 28m

$249

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Tue 3/17

3:10 pm-6:58 am

2 stops12h 48m

Toronto Pearson Intl

Mon 3/23

4:45 pm-7:05 pm

Nonstop5h 20m

$250

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Mon 5/25

7:05 am-5:22 pm

1 stop7h 17m

Toronto Pearson Intl

Fri 5/29

12:00 pm-8:28 pm

2 stops11h 28m

$251

SeattleToronto

SEA - YKF

SEAYKF

Seattle/Tacoma Intl

Wed 3/11

3:10 pm-5:29 am

1 stop11h 19m

Toronto Region of Waterloo Intl

Sat 3/14

7:00 pm-2:19 pm

1 stop22h 19m

$251

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Wed 2/18

8:10 am-3:53 pm

Nonstop4h 43m

Toronto Pearson Intl

Wed 2/18

7:50 pm-10:16 pm

Nonstop5h 26m

$252

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Fri 1/9

8:00 pm-5:59 am

1 stop6h 59m

Toronto Pearson Intl

Sat 1/10

8:05 am-2:31 pm

2 stops9h 26m

$254

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 Toronto from

How to get the cheapest flight ticket from Seattle to Toronto

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?

The month of November is, on average, the cheapest month to fly to Toronto from Seattle, with most prices found around $274. If you are unable to visit Toronto during the month of November, then departing from Seattle during the month January is also very affordable. Most momondo users find prices during this month for around $283.

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

On average, the least expensive day to fly to Toronto from Seattle is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $539. However, this price may fluctuate depending on the airline, the season, and holidays. The most expensive day to fly to Toronto is Saturday, with ticket prices averaging around $712.

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

In the afternoon is the cheapest time of day to fly from Seattle to Toronto when you can find flight prices for as low as $283. Flying to Toronto in the afternoon is an ideal time because this is during off-peak travel hours. Flights to Toronto are more costly in the morning, with an average ticket price of $615. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

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

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

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

You are more likely to see cheaper flights to Toronto from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Toronto for around $413 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Toronto from Seattle for as low as $292 on momondo.

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

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

No. A direct flight is the cheapest option for a flight between Seattle to Toronto.

How have Seattle to Toronto flight prices changed over time?

As of December 2025, prices for Seattle to Toronto flights are approximately 46% cheaper when compared to flights at the same time last year.

When to book flights from Seattle to Toronto

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

Cheap Seattle to Toronto (SEA to YTO) flight deals and tips

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

Best Price Found

$154

Fastest flight time

4h 40m

Direct flights

Every day

Airports in Toronto

3 airports
The best one-way flight to Toronto from Seattle in the past 72 hours is $154. The best round-trip flight deal from Seattle to Toronto found on momondo in the last 72 hours is $382.
The fastest flight from Seattle to Toronto takes 4h 40m
Direct flights go from Seattle to Toronto every day.
There are 3 airports in Toronto. From Seattle there are direct flights to Toronto Pearson Intl (YYZ).
Search flight deals

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

    Seattle/Tacoma Intl and Toronto are 2065.1 mi apart from one another. By plane, this route typically takes 4h 40m.

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

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

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

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, 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.

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

    The travel and health documents you'll need for your trip to Toronto 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. 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?

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

Best airlines flying from Seattle to Toronto

Compare and see reviews for airlines that fly from Seattle to Toronto with momondo
Airline
Rating
Free Cancellation
Price
Air CanadaPriceFrom $151Free CancellationRating
7.1
10,534 reviews
Search Air Canada flights
United AirlinesPriceFrom $173Free CancellationRating
7.4
9,093 reviews
Search United Airlines flights
DeltaPriceFrom $182Free CancellationRating
7.9
8,009 reviews
Search Delta flights
WestJetPriceFrom $226Free CancellationRating
7.2
3,204 reviews
Search WestJet flights
Alaska AirlinesPriceFrom $253Free CancellationRating
8.0
11,478 reviews
Search Alaska Airlines flights

  • Alaska Airlines Flights From Seattle to Toronto

    Alaska Airlines flight deals from Seattle to Toronto start from $253 round-trip. Over the 1 Alaska Airlines flight for this route in a normal week, average airfare is usually $463 round-trip - but some users have found much cheaper deals with momondo.

  • United Airlines Flights From Seattle to Toronto

    United Airlines is also a popular choice for this route. United Airlines flight deals for Seattle to Toronto start from as low as $173 round-trip, depending on your selected dates, with average United Airlines deals seen on momondo around $380. United Airlines operates 7 flights to Toronto from Seattle in an average week. Users have rated it 7.4/10 across 9,093 reviews.

Why use momondo?

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

It is quick and easy to find Seattle to Toronto flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Toronto that suits you.

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

momondo does allow users to show only those flights to Toronto from Seattle which offer a flexible booking policy as well as other useful filters and features.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Seattle to Toronto.

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

Yes. momondo can track prices for Seattle to Toronto flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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Find better results for your trip to Canada

Fly into one of these airports located in Toronto

Airports listed have a maximum distance of 52.0 mi from Toronto
Toronto Region of Waterloo Intl Airport
Toronto Island Airport
Toronto Pearson Intl Airport