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Cheap flights from Toronto Pearson Intl Airport to Seattle from £145

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 17/7. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — SEA
30 Jul — 6 Aug1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Pearson Intl to Seattle

Enter your travel dates to find the best prices.

Cheapest flights from Pearson Intl to Seattle
Explore the most affordable flight options available from Pearson Intl to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 30 June 2026.

Wed 28/1007:45
YYZ
-
SEA
1 stop9h 35m
WestJet
Sat 31/1015:20
SEA
-
YYZ
2 stops11h 38m
WestJet
Deal found 25/6£206
Thu 20/812:00
YYZ
-
SEA
2 stops9h 45m
WestJet
Tue 25/807:00
SEA
-
YYZ
1 stop7h 10m
WestJet
Deal found 29/6£254
Wed 28/1018:25
YYZ
-
SEA
Nonstop5h 34m
Air Canada
Sat 31/1007:45
SEA
-
YYZ
Nonstop4h 40m
Air Canada
Deal found 25/6£271
Thu 19/1116:45
YYZ
-
SEA
Nonstop5h 29m
Alaska Airlines
Sat 28/1107:55
SEA
-
YYZ
Nonstop4h 44m
Alaska Airlines
Deal found 29/6£272
Wed 28/1007:45
YYZ
-
SEA
1 stop9h 35m
Multiple Airlines
Sat 31/1007:45
SEA
-
YYZ
Nonstop4h 40m
Multiple Airlines
Deal found 25/6£273
Thu 6/822:25
YYZ
-
SEA
1 stop14h 15m
WestJet
Thu 20/819:35
SEA
-
YYZ
1 stop8h 20m
WestJet
Deal found 27/6£280
Thu 1/1016:18
YYZ
-
SEA
1 stop9h 41m
Multiple Airlines
Mon 5/1008:00
SEA
-
YYZ
Nonstop4h 50m
Multiple Airlines
Deal found 29/6£283
Fri 25/909:44
YYZ
-
SEA
1 stop13h 53m
Multiple Airlines
Mon 28/908:00
SEA
-
YYZ
Nonstop4h 41m
Multiple Airlines
Deal found 25/6£284
Wed 9/916:18
YYZ
-
SEA
1 stop7h 57m
United Airlines
Wed 9/923:59
SEA
-
YYZ
1 stop11h 25m
United Airlines
Deal found 25/6£286

Find flight deals from Pearson Intl to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Pearson Intl (YYZ) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 30 June 2026.

Round-trip from

£206

One-way from

£145

Popular in

June

Cheapest in

February

Average price

£342

Good one-way deal

£497 or less
WestJet
  • WestJet
  • 28/10-31/10
  • 3 total stops
  • 21h 13m total
  • Toronto to Seattle
Search Deals
WestJet
  • WestJet
  • 17/7
  • 2 total stops
  • 9h 45m total
  • Toronto to Seattle
Search Deals
Highest demand for flights based on searches. 18% potential increase in price (£45 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£6 potential savings vs. average return price).
Search Deals
Average for round-trip flights in June 2026
Search Deals
Price to beat on a one-way flight from Toronto Pearson Intl to Seattle/Tacoma Intl.
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Pearson Intl 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, Cheapflights users made 858,174 searches. Data last updated 30 June 2026.
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

Cheapest return flight

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Mon 21/9

13:00-19:15

1 stop9h 15m

Seattle/Tacoma Intl

Mon 28/9

08:00-15:41

Nonstop4h 41m

£289

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sun 15/11

06:00-14:23

1 stop11h 23m

Seattle/Tacoma Intl

Thu 26/11

23:05-09:01

1 stop6h 56m

£290

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Tue 11/8

17:50-22:05

1 stop7h 15m

Seattle/Tacoma Intl

Tue 18/8

06:05-18:34

1 stop9h 29m

£301

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Mon 20/7

17:45-23:59

1 stop9h 14m

Seattle/Tacoma Intl

Thu 30/7

07:20-22:01

1 stop11h 41m

£330

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Thu 13/8

16:18-23:04

1 stop9h 46m

Seattle/Tacoma Intl

Mon 17/8

19:35-07:00

1 stop8h 25m

£354

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Mon 10/8

21:00-09:35

1 stop15h 35m

Seattle/Tacoma Intl

Mon 17/8

17:20-07:00

1 stop10h 40m

£354

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Mon 27/7

21:00-09:40

1 stop15h 40m

Seattle/Tacoma Intl

Mon 3/8

17:15-13:42

1 stop17h 27m

£355

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sun 12/7

21:00-09:40

1 stop15h 40m

Seattle/Tacoma Intl

Thu 16/7

05:15-16:10

1 stop7h 55m

£357

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Thu 23/7

17:45-23:59

1 stop9h 14m

Seattle/Tacoma Intl

Thu 30/7

07:20-22:01

1 stop11h 41m

£357

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sat 11/7

10:45-23:19

2 stops15h 34m

Seattle/Tacoma Intl

Mon 13/7

23:11-11:49

1 stop9h 38m

£357

Flights are sorted by cheapest return flights first.

Deals found on 27/6

Showing 1-10 of 24 resultsSorted by cheapest first
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Best time to book a flight from Pearson Intl to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Pearson Intl with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Toronto Pearson Intl Airport to Seattle

How far ahead should I book a flight from Toronto Pearson Intl Airport to Seattle?

The price you pay for your flight from Toronto Pearson Intl Airport to Seattle may vary depending on when you book. For the best chance of a lower fare, look to book 85 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Toronto Pearson Intl Airport to Seattle?

Currently, February is the cheapest month in which you can book a flight from Toronto Pearson Intl Airport to Seattle (average of £179). Flying from Toronto Pearson Intl Airport to Seattle in June is currently the most expensive (average of £342). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from YYZ to SEA?

Find hourly flight availability from Pearson Intl to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 30 June 2026.

When flying from Toronto Pearson Intl Airport to Seattle, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

How much does it cost for a return flight from Toronto Pearson Intl Airport to Seattle?

Related info for your journey

Find useful and relevant information for your journey from Pearson Intl to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Seattle from Toronto Pearson Intl?

    Most people fly into Seattle/Tacoma Intl (SEA) if they book a flight to Seattle from Toronto Pearson Intl. On average, Seattle/Tacoma Intl has 3 inbound flights from Toronto Pearson Intl per day from 0 airlines. Seattle/Tacoma Intl is conveniently located just 11.4 mi from Seattle’s city center.

  • How long is the flight from Toronto Pearson Intl Airport to Seattle?

    There are many flights that can get you from Toronto Pearson Intl Airport to Seattle in 9h 46m. Fly via Delta or United Airlines to get the fastest option. Toronto Pearson Intl Airport and Seattle are separated by a distance of 2054 mi. This flight may include one or multiple stops.

  • What are the most reliable airlines from Toronto Pearson Intl Airport to Seattle?

    Before booking your flight to Seattle from Toronto Pearson Intl Airport, check out the most reliable airlines to get you to your destination on time: Hawaiian Airlines (100%), Alaska Airlines (95%), Qatar Airways( 67%).

  • What are the cheapest flights from Toronto Pearson Intl Airport to Seattle?

    While on average a flight from Toronto Pearson Intl Airport to Seattle is generally £499, our data shows the cheapest flight currently is £497. When looking at the most popular route, (Toronto Pearson Intl - Seattle/Tacoma Intl), you can expect to pay £274 for that flight.

  • Can I find deals for flights from Pearson Intl to Seattle that include hotel bookings?

    Yes. In addition to deals on Pearson Intl to Seattle flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Pearson Intl to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Pearson Intl to Seattle.

  • Can I find deals for business class flights from Pearson Intl to Seattle?

    Yes. Cheapflights offers flight deals from Pearson Intl to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Toronto Pearson Intl Airport to Seattle?

    Currently, February is the cheapest month in which you can book a flight from Toronto Pearson Intl Airport to Seattle (average of £179). Flying from Toronto Pearson Intl Airport to Seattle in June is currently the most expensive (average of £342). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
Federal Way
SeaTac

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Why should you use Cheapflights to find cheap flight tickets from Pearson Intl to Seattle?

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Can Cheapflights find flights from Pearson Intl to Seattle with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Pearson Intl to Seattle, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from Pearson Intl to Seattle become cheaper?

Of course! You can now track prices for flights from Pearson Intl to Seattle and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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