Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Toronto Pearson Intl Airport to Seattle from $153

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 10/17. 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 Toronto Pearson Intl Airport to Seattle

Cheap round-trip flights

WestJet Logo
1:30 pm - 7:21 pmYYZ-SEA
8h 51m1 stop
WestJet Logo
3:20 pm - 5:58 amSEA-YYZ
11h 38m2 stops
$212WestJet
Find Deal
Fri, Oct 24 - Sat, Nov 1
WestJet Logo
6:45 am - 12:35 pmYYZ-SEA
8h 50m1 stop
WestJet Logo
1:50 pm - 12:22 amSEA-YYZ
7h 32m1 stop
$213WestJet
Find Deal
Fri, Oct 3 - Sat, Oct 11
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
Wed, Dec 10 - Wed, Feb 25
Alaska Airlines Logo
4:45 pm - 7:18 pmYYZ-SEA
5h 33mnonstop
Alaska Airlines Logo
8:00 am - 3:35 pmSEA-YYZ
4h 35mnonstop
$219Alaska Airlines
Find Deal
Sat, Dec 13 - Wed, Feb 25
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
$225Multiple Airlines
Find Deal
Wed, Dec 10 - Tue, Feb 24
Air Canada Logo
12:00 pm - 7:31 pmYYZ-SEA
10h 31m1 stop
Air Canada Logo
2:55 pm - 1:06 amSEA-YYZ
7h 11m1 stop
$228Air Canada
Find Deal
Tue, Oct 7 - Mon, Oct 20
Air Canada Logo
6:15 am - 2:16 pmYYZ-SEA
11h 01m2 stops
Air Canada Logo
10:00 am - 10:05 pmSEA-YYZ
9h 05m2 stops
$230Air Canada
Find Deal
Tue, Oct 7 - Tue, Oct 21
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
$233Multiple Airlines
Find Deal
Thu, Dec 11 - Mon, Feb 23
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
Find Deal
Tue, Oct 7 - Tue, Oct 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
Tue, Oct 7 - Tue, Oct 7

United Airlines flights from Toronto Pearson Intl Airport to Seattle

Our best United Airlines deals on Toronto Pearson Intl Airport 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
$236
Find similar
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
$237
Find similar
United Airlines
Oct 7
YYZ7:00 amToronto Pearson Intl
13h 53m
3 stops
SEA5:53 pmSeattle/Tacoma Intl
Oct 11
SEA7:37 pmSeattle/Tacoma Intl
11h 21m
2 stops
YYZ9:58 amToronto Pearson Intl
$242
Find similar

Air Canada flights from Toronto Pearson Intl Airport to Seattle

Our best Air Canada deals on Toronto Pearson Intl Airport to Seattle flight tickets
Air Canada
Oct 7
YYZ12:00 pmToronto Pearson Intl
10h 31m
1 stop
SEA7:31 pmSeattle/Tacoma Intl
Oct 20
SEA2:55 pmSeattle/Tacoma Intl
7h 11m
1 stop
YYZ1:06 amToronto Pearson Intl
$228
Find similar
Air Canada
Oct 7
YYZ6:15 amToronto Pearson Intl
11h 01m
2 stops
SEA2:16 pmSeattle/Tacoma Intl
Oct 21
SEA10:00 amSeattle/Tacoma Intl
9h 05m
2 stops
YYZ10:05 pmToronto Pearson Intl
$230
Find similar
Air Canada
Oct 7
YYZ1:00 pmToronto Pearson Intl
9h 31m
1 stop
SEA7:31 pmSeattle/Tacoma Intl
Oct 11
SEA2:55 pmSeattle/Tacoma Intl
7h 11m
1 stop
YYZ1:06 amToronto Pearson Intl
$238
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 September 17, 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

Fri 10/24

1:30 pm-7:21 pm

1 stop8h 51m

Seattle/Tacoma Intl

Sat 11/1

3:20 pm-5:58 am

2 stops11h 38m

$212

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Fri 10/3

6:45 am-12:35 pm

1 stop8h 50m

Seattle/Tacoma Intl

Sat 10/11

1:50 pm-12:22 am

1 stop7h 32m

$213

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 12/10

4:45 pm-7:18 pm

Nonstop5h 33m

Seattle/Tacoma Intl

Wed 2/25

8:00 am-3:35 pm

Nonstop4h 35m

$217

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sat 12/13

4:45 pm-7:18 pm

Nonstop5h 33m

Seattle/Tacoma Intl

Wed 2/25

8:00 am-3:35 pm

Nonstop4h 35m

$219

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 12/10

7:45 am-2:20 pm

1 stop9h 35m

Seattle/Tacoma Intl

Tue 2/24

8:00 am-3:35 pm

Nonstop4h 35m

$225

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Tue 10/7

12:00 pm-7:31 pm

1 stop10h 31m

Seattle/Tacoma Intl

Mon 10/20

2:55 pm-1:06 am

1 stop7h 11m

$228

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Tue 10/7

6:15 am-2:16 pm

2 stops11h 01m

Seattle/Tacoma Intl

Tue 10/21

10:00 am-10:05 pm

2 stops9h 05m

$230

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Thu 12/11

4:45 pm-7:18 pm

Nonstop5h 33m

Seattle/Tacoma Intl

Mon 2/23

3:10 pm-5:58 am

2 stops11h 48m

$233

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Tue 10/7

11:00 am-6:49 pm

1 stop10h 49m

Seattle/Tacoma Intl

Tue 10/7

10:35 pm-9:58 am

1 stop8h 23m

$236

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Tue 10/7

1:00 pm-6:49 pm

1 stop8h 49m

Seattle/Tacoma Intl

Tue 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
1
2

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 $274.

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 $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 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 $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 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 $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 Pearson Intl Airport for as low as $306 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?

You could potentially save up to 20% on your flight if you consider stops on a Toronto Pearson Intl Airport to Seattle flight.

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

As of September 2025, prices for Toronto Pearson Intl Airport to Seattle flights are approximately 31% 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

$296

Fastest flight time

5h 15m

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 $296. The best round-trip flight deal from Toronto Pearson Intl Airport to Seattle found on momondo in the last 72 hours is $312.
The fastest flight from Toronto Pearson Intl Airport to Seattle takes 5h 15m
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 33m.

  • 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 $193Free CancellationRating
7.2
3,095 reviews
Search WestJet flights
United AirlinesPriceFrom $240Free CancellationRating
7.4
8,926 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
7,961 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 3 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 $246 (round-trip), much lower than the average airfare cost of $376 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 $459 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. 8,926 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 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.

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.
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 the United States