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Cheap flights from Toronto Pearson Intl Airport to Seattle from £117

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 8/12. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — SEA
19 Dec — 26 Dec1
1 adult
1 adult, Economy, 0 bags

Find 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 19 November 2025.

Tue 9/1209:00YYZ - SEA
2 stops12h 25mUnited Airlines
Mon 15/1207:00SEA - YYZ
1 stop11h 21mUnited Airlines
Deal found 18/11£189
Thu 11/1206:50YYZ - SEA
2 stops11h 39mUnited Airlines
Sun 14/1209:25SEA - YYZ
1 stop19h 05mUnited Airlines
Deal found 18/11£194
Wed 10/1217:55YYZ - SEA
1 stop9h 55mUnited Airlines
Sat 13/1215:40SEA - YYZ
2 stops15h 18mUnited Airlines
Deal found 17/11£201
Thu 11/1206:00YYZ - SEA
1 stop11h 18mDelta
Tue 16/1206:00SEA - YYZ
1 stop7h 15mDelta
Deal found 16/11£205
Mon 15/1221:00YYZ - SEA
1 stop17h 45mUnited Airlines
Tue 16/1215:45SEA - YYZ
2 stops15h 13mUnited Airlines
Deal found 17/11£207
Wed 17/1206:30YYZ - SEA
1 stop14h 58mUnited Airlines
Wed 7/110:58SEA - YYZ
1 stop7h 23mUnited Airlines
Deal found 18/11£208
Wed 10/1216:45YYZ - SEA
Nonstop5h 33mAlaska Airlines
Sun 14/1207:55SEA - YYZ
Nonstop4h 40mAlaska Airlines
Deal found 17/11£210
Fri 26/1221:00YYZ - SEA
1 stop18h 03mUnited Airlines
Wed 7/119:30SEA - YYZ
1 stop18h 22mUnited Airlines
Deal found 17/11£211
Thu 11/1216:45YYZ - SEA
Nonstop5h 33mAlaska Airlines
Sun 14/1207:55SEA - YYZ
Nonstop4h 40mAlaska Airlines
Deal found 17/11£216
Tue 2/1216:45YYZ - SEA
Nonstop5h 33mAlaska Airlines
Wed 7/107:55SEA - YYZ
Nonstop4h 40mAlaska Airlines
Deal found 18/11£222
Tue 2/1216:45YYZ - SEA
Nonstop5h 33mAlaska Airlines
Thu 8/107:55SEA - YYZ
Nonstop4h 40mAlaska Airlines
Deal found 18/11£227
Wed 17/1216:45YYZ - SEA
Nonstop5h 33mAlaska Airlines
Wed 7/107:55SEA - YYZ
Nonstop4h 40mAlaska Airlines
Deal found 18/11£228

Cheap 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 19 November 2025.

Round-trip from

£186

One-way from

£117

Popular in

July

Cheapest in

February

Average price

£292

Good round-trip deal

£278 or less

Good one-way deal

£500 or less
WestJet
  • WestJet
  • 7/4-10/4
  • 3 total stops
  • 21h 22m total
  • Toronto to Seattle
Search Deals
Alaska Airlines
  • Alaska Airlines
  • 8/12
  • Nonstop
  • 5h 33m total
  • Toronto to Seattle
Search Deals
Highest demand for flights based on searches. 14% potential increase in price (£36 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£5 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 2025
Search Deals
Price to beat on a round-trip flight from Toronto Pearson Intl to Seattle/Tacoma Intl.
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 19 November 2025.
Use the filters below to find and compare flights from Toronto Pearson Intl Airport to Seattle that are best for you.

Fly from

Pearson Intl

Fly to

Seattle

Route

Depart

Return

Price

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Thu 8/1

17:30-22:43

1 stop8h 13m

Seattle/Tacoma Intl

Wed 14/1

05:00-15:02

1 stop7h 02m

£189

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Thu 8/1

09:00-18:26

2 stops12h 26m

Seattle/Tacoma Intl

Tue 13/1

09:25-23:59

2 stops11h 34m

£189

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sat 14/2

09:00-21:14

2 stops15h 14m

Seattle/Tacoma Intl

Sun 15/2

07:00-19:45

1 stop9h 45m

£189

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Fri 12/12

19:40-10:09

2 stops17h 29m

Seattle/Tacoma Intl

Tue 30/12

23:09-11:48

1 stop9h 39m

£189

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Thu 8/1

11:00-16:01

1 stop8h 01m

Seattle/Tacoma Intl

Mon 12/1

10:58-21:21

1 stop7h 23m

£194

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 7/1

11:00-19:55

2 stops11h 55m

Seattle/Tacoma Intl

Sun 11/1

05:00-15:02

1 stop7h 02m

£211

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Fri 12/12

16:45-19:18

Nonstop5h 33m

Seattle/Tacoma Intl

Sun 14/12

07:55-15:35

Nonstop4h 40m

£216

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Thu 9/4

22:15-14:19

2 stops19h 04m

Seattle/Tacoma Intl

Wed 15/4

15:10-05:58

2 stops11h 48m

£234

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sun 22/2

16:45-19:18

Nonstop5h 33m

Seattle/Tacoma Intl

Sat 28/2

07:55-15:35

Nonstop4h 40m

£245

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Mon 15/12

18:50-00:50

1 stop9h 00m

Seattle/Tacoma Intl

Tue 16/12

08:10-15:53

Nonstop4h 43m

£252

Flights are sorted by cheapest return flights first.

Deals found on 16/11

Showing 1-10 of 22 results
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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?

Use this chart to determine the optimal time to book a return flight from Pearson Intl to Seattle. Price data was last updated on 14 November 2025.

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 86 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, March is the cheapest month in which you can book a flight from Toronto Pearson Intl Airport to Seattle (average of £131). Flying from Toronto Pearson Intl Airport to Seattle in June is currently the most expensive (average of £189). 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 19 November 2025.

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 4 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 5h 32m. Fly via WestJet, United Airlines, or Alaska 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 cheapest airlines to fly from Toronto Pearson Intl Airport to Seattle one-way?

    For one-way options, check prices for Alaska Airlines. According to our data, you can fly for as low as £117. Users have also found prices from £122 and £124 on Delta and United Airlines, respectively.

  • 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: Air Tahiti Nui (89%), Hawaiian Airlines (83%), Alaska Airlines( 72%).

  • 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 £409, our data shows the cheapest flight currently is £275. When looking at the most popular route, (Toronto Pearson Intl - Seattle/Tacoma Intl), you can expect to pay £232 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, March is the cheapest month in which you can book a flight from Toronto Pearson Intl Airport to Seattle (average of £131). Flying from Toronto Pearson Intl Airport to Seattle in June is currently the most expensive (average of £189). 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
Leavenworth
Bothell
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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