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Cheap flights from Toronto to Seattle from C$ 207

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 8/1. 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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Cheap round-trip flights

Enter your travel dates to find the best prices.
WestJet Logo
8:00 a.m. - 2:20 p.m.YYZ-SEA
33h 20m2 stops
WestJet Logo
3:10 p.m. - 5:58 a.m.SEA-YYZ
11h 48m2 stops
C$ 307WestJet
Find Deal
Sat, 24 Jan - Wed, 28 Jan
WestJet Logo
4:00 p.m. - 2:20 p.m.YYZ-SEA
25h 20m1 stop
WestJet Logo
3:10 p.m. - 5:58 a.m.SEA-YYZ
11h 48m2 stops
C$ 312WestJet
Find Deal
Sat, 24 Jan - Thu, 29 Jan
Multiple Airlines Logo
4:45 p.m. - 7:17 p.m.YYZ-SEA
5h 32mdirect
Multiple Airlines Logo
3:10 p.m. - 5:58 a.m.SEA-YYZ
11h 48m2 stops
C$ 328Multiple Airlines
Find Deal
Sat, 24 Jan - Thu, 29 Jan
Multiple Airlines Logo
7:50 p.m. - 10:16 p.m.YYZ-SEA
5h 26mdirect
Multiple Airlines Logo
11:55 a.m. - 11:39 p.m.SEA-YYZ
8h 44m2 stops
C$ 329Multiple Airlines
Find Deal
Sun, 23 Nov - Sat, 29 Nov
Air Canada Logo
7:50 p.m. - 10:16 p.m.YYZ-SEA
5h 26mdirect
Air Canada Logo
8:10 a.m. - 3:53 p.m.SEA-YYZ
4h 43mdirect
C$ 333Air Canada
Find Deal
Sun, 23 Nov - Sat, 29 Nov
Air Canada Logo
7:50 p.m. - 10:16 p.m.YYZ-SEA
5h 26mdirect
Air Canada Logo
8:10 a.m. - 3:53 p.m.SEA-YYZ
4h 43mdirect
C$ 338Air Canada
Find Deal
Tue, 25 Nov - Tue, 2 Dec
Alaska Airlines Logo
4:45 p.m. - 7:05 p.m.YYZ-SEA
5h 20mdirect
Alaska Airlines Logo
8:00 a.m. - 3:35 p.m.SEA-YYZ
4h 35mdirect
C$ 349Alaska Airlines
Find Deal
Sat, 14 Feb - Fri, 20 Feb
United Airlines Logo
2:57 p.m. - 9:35 p.m.YYZ-SEA
9h 38m1 stop
United Airlines Logo
2:10 p.m. - 11:59 p.m.SEA-YYZ
6h 49m1 stop
C$ 373United Airlines
Find Deal
Wed, 24 Dec - Wed, 7 Jan
United Airlines Logo
2:57 p.m. - 9:35 p.m.YYZ-SEA
9h 38m1 stop
United Airlines Logo
9:00 a.m. - 9:58 a.m.SEA-YYZ
21h 58m2 stops
C$ 378United Airlines
Find Deal
Wed, 24 Dec - Tue, 6 Jan
Alaska Airlines Logo
4:45 p.m. - 7:05 p.m.YYZ-SEA
5h 20mdirect
Alaska Airlines Logo
8:00 a.m. - 3:35 p.m.SEA-YYZ
4h 35mdirect
C$ 381Alaska Airlines
Find Deal
Mon, 2 Mar - Tue, 3 Mar

WestJet flights from Toronto to Seattle

Our best WestJet deals on Toronto to Seattle flight tickets
WestJet
24 Jan
YYZ8:00 a.m.Toronto Pearson Intl
33h 20m
2 stops
SEA2:20 p.m.Seattle/Tacoma Intl
28 Jan
SEA3:10 p.m.Seattle/Tacoma Intl
11h 48m
2 stops
YYZ5:58 a.m.Toronto Pearson Intl
C$ 307
Find similar
WestJet
24 Jan
YYZ4:00 p.m.Toronto Pearson Intl
25h 20m
1 stop
SEA2:20 p.m.Seattle/Tacoma Intl
29 Jan
SEA3:10 p.m.Seattle/Tacoma Intl
11h 48m
2 stops
YYZ5:58 a.m.Toronto Pearson Intl
C$ 312
Find similar
WestJet
8 Feb
YYZ7:45 a.m.Toronto Pearson Intl
9h 34m
1 stop
SEA2:19 p.m.Seattle/Tacoma Intl
16 Feb
SEA3:10 p.m.Seattle/Tacoma Intl
23h 18m
1 stop
YYZ5:28 p.m.Toronto Pearson Intl
C$ 318
Find similar

Air Canada flights from Toronto to Seattle

Our best Air Canada deals on Toronto to Seattle flight tickets
Air Canada
23 Nov
YYZ7:50 p.m.Toronto Pearson Intl
5h 26m
SEA10:16 p.m.Seattle/Tacoma Intl
29 Nov
SEA8:10 a.m.Seattle/Tacoma Intl
4h 43m
YYZ3:53 p.m.Toronto Pearson Intl
C$ 333
Find similar
Air Canada
25 Nov
YYZ7:50 p.m.Toronto Pearson Intl
5h 26m
SEA10:16 p.m.Seattle/Tacoma Intl
2 Dec
SEA8:10 a.m.Seattle/Tacoma Intl
4h 43m
YYZ3:53 p.m.Toronto Pearson Intl
C$ 338
Find similar
Air Canada
25 Nov
YYZ7:50 p.m.Toronto Pearson Intl
5h 26m
SEA10:16 p.m.Seattle/Tacoma Intl
2 Dec
SEA8:00 p.m.Seattle/Tacoma Intl
6h 59m
1 stop
YYZ5:59 a.m.Toronto Pearson Intl
C$ 345
Find similar

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 96,600 searches. Data last updated 3 November 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

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sat 24/1

8:00 a.m.-2:20 p.m.

2 stops33h 20m

Seattle/Tacoma Intl

Wed 28/1

3:10 p.m.-5:58 a.m.

2 stops11h 48m

C$ 307

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sat 24/1

4:00 p.m.-2:20 p.m.

1 stop25h 20m

Seattle/Tacoma Intl

Thu 29/1

3:10 p.m.-5:58 a.m.

2 stops11h 48m

C$ 312

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sat 24/1

4:45 p.m.-7:17 p.m.

Nonstop5h 32m

Seattle/Tacoma Intl

Thu 29/1

3:10 p.m.-5:58 a.m.

2 stops11h 48m

C$ 328

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sun 23/11

7:50 p.m.-10:16 p.m.

Nonstop5h 26m

Seattle/Tacoma Intl

Sat 29/11

11:55 a.m.-11:39 p.m.

2 stops8h 44m

C$ 329

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sun 23/11

7:50 p.m.-10:16 p.m.

Nonstop5h 26m

Seattle/Tacoma Intl

Sat 29/11

8:10 a.m.-3:53 p.m.

Nonstop4h 43m

C$ 333

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Tue 25/11

7:50 p.m.-10:16 p.m.

Nonstop5h 26m

Seattle/Tacoma Intl

Tue 2/12

8:10 a.m.-3:53 p.m.

Nonstop4h 43m

C$ 338

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sat 14/2

4:45 p.m.-7:05 p.m.

Nonstop5h 20m

Seattle/Tacoma Intl

Fri 20/2

8:00 a.m.-3:35 p.m.

Nonstop4h 35m

C$ 349

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 24/12

2:57 p.m.-9:35 p.m.

1 stop9h 38m

Seattle/Tacoma Intl

Wed 7/1

2:10 p.m.-11:59 p.m.

1 stop6h 49m

C$ 373

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 24/12

2:57 p.m.-9:35 p.m.

1 stop9h 38m

Seattle/Tacoma Intl

Tue 6/1

9:00 a.m.-9:58 a.m.

2 stops21h 58m

C$ 378

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Mon 2/3

4:45 p.m.-7:05 p.m.

Nonstop5h 20m

Seattle/Tacoma Intl

Tue 3/3

8:00 a.m.-3:35 p.m.

Nonstop4h 35m

C$ 381

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

What is the cheapest month to fly to Seattle?

If you aren’t able to travel to Seattle during the month of February, then flying in January is also cheap. Prices for this month can be found on momondo for an average of C$ 373.

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

Our data shows that Thursday is the least expensive day to fly to Seattle. Tickets to fly out on this day can be as low as C$ 561. If your travel schedule is flexible, try to avoid departing on a Monday because tickets tend to average around C$ 792. These prices are subject to change though, so be sure to set up a Price Alert for flights to Seattle.

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

Our most recent data shows that the best time of day to fly to Seattle is in the evening. Flights from Toronto to Seattle during this time can be as low as C$ 429. Flights in the morning are often more expensive with an average ticket price of C$ 847.

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 C$ 496 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 C$ 426 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 12% 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 November 2025, prices for Toronto to Seattle flights are approximately 29% 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

C$ 285

Fastest flight time

5h 20m

Direct flights

Every day

Airports in Seattle

1 airport
The best one-way flight to Seattle from Toronto in the past 72 hours is C$ 285. The best round-trip flight deal from Toronto to Seattle found on momondo in the last 72 hours is C$ 393.
The fastest flight from Toronto to Seattle takes 5h 20m
Direct flights go from Toronto to Seattle every day.
There is 1 airport near Seattle: Seattle/Tacoma Intl (SEA)
Search flight deals

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

    The distance between Toronto and Seattle/Tacoma Intl is about 3323.4 km. A reasonable flight in good conditions will take 5h 20m.

  • 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 a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Toronto to Seattle/Tacoma Intl Airport.

  • What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

    The travel and health documents required for your trip to Seattle/Tacoma Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Seattle/Tacoma Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • 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 C$ 185Free CancellationRating
7.2
3,153 reviews
Search WestJet flights
Alaska AirlinesPriceFrom C$ 305Free CancellationRating
8.0
11,235 reviews
Search Alaska Airlines flights
Air CanadaPriceFrom C$ 345Free CancellationRating
7.1
10,394 reviews
Search Air Canada flights
United AirlinesPriceFrom C$ 368Free CancellationRating
7.4
8,997 reviews
Search United Airlines flights
DeltaPriceFrom C$ 380Free CancellationRating
7.9
8,001 reviews
Search Delta flights
Hawaiian AirlinesPriceFrom C$ 417Free CancellationRating
7.8
2,799 reviews
Search Hawaiian Airlines flights

  • Alaska Airlines Flights From Toronto to Seattle

    Alaska Airlines operates around 1 flight from Toronto to Seattle every week. The average price of these flights found in the last 72 hours has been C$ 512, but momondo users have found Alaska Airlines deals from Toronto to Seattle from as low as C$ 305 round-trip. Alaska Airlines has been scored 8.0/10 in 11,236 reviews.

  • Hawaiian Airlines Flights From Toronto to Seattle

    Hawaiian Airlines is also a popular choice for this route. Hawaiian Airlines flight deals for Toronto to Seattle start from as low as C$ 417 round-trip, depending on your selected dates, with average Hawaiian Airlines deals seen on momondo around C$ 470. Hawaiian Airlines operates 4 flights to Seattle from Toronto in an average week. Users have rated it 7.8/10 across 2,799 reviews.

Travelling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Leavenworth
Lynnwood
Marysville
Tacoma
SeaTac
Kirkland
Olympia
Ocean Shores
Redmond
Shoreline
Ellensburg
Gig Harbor
Renton
Mukilteo
Cle Elum
Centralia
Federal Way
Puyallup
Shelton
Lakewood

Why use momondo?

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

It is quick and easy to find Toronto to Seattle 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 Seattle that suits you.

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?

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 Toronto to Seattle.

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

If you are simply researching potential flights to Seattle, momondo offers a useful price alert feature which will track prices for flights to Seattle from Toronto and alert you 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.
Start using Trips
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