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Cheap flights from Toronto Pearson Intl Airport to Seattle from £116

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 17/10. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — SEA
18 Oct — 25 Oct1
1 adult
1 adult, Economy

Cheapflights Tip: The best prices from Toronto Pearson Intl to Seattle/Tacoma Intl are usually found in February or January, booked 70 days in advance, depart on a Wednesday or Monday and return on a Monday

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 18 September 2025.

Round-trip from

£159

One-way from

£116

Popular in

July

Cheapest in

February

Average price

£271
Alaska Airlines
  • Alaska Airlines
  • 10/12-24/2
  • Nonstop
  • 10h 08m total
  • Toronto to Seattle
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United Airlines
  • United Airlines
  • 17/10
  • 1 total stop
  • 11h 45m total
  • Toronto to Seattle
Search Deals
Highest demand for flights based on searches. 15% potential increase in price (£35 potential increase over avg. return price).
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Cheapest flight prices on average. 2% potential price decrease (£5 potential savings vs. average return price).
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Average for round-trip flights in September 2025
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Find flight deals from Pearson Intl to Seattle

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 18 September 2025.

Wed 10/1216:45YYZ - SEA
Nonstop5h 33mAlaska Airlines
Wed 25/208:00SEA - YYZ
Nonstop4h 35mAlaska Airlines
Deal found 16/9£159
Sat 13/1216:45YYZ - SEA
Nonstop5h 33mAlaska Airlines
Mon 2/308:00SEA - YYZ
Nonstop4h 35mAlaska Airlines
Deal found 16/9£166
Mon 8/1216:45YYZ - SEA
Nonstop5h 33mAlaska Airlines
Fri 27/208:00SEA - YYZ
Nonstop4h 35mAlaska Airlines
Deal found 16/9£171
Sat 11/1017:15YYZ - SEA
1 stop8h 15mUnited Airlines
Sat 18/1013:57SEA - YYZ
1 stop7h 01mUnited Airlines
Deal found 16/9£177
Wed 10/1217:55YYZ - SEA
1 stop10h 04mUnited Airlines
Tue 24/205:07SEA - YYZ
2 stops15h 16mUnited Airlines
Deal found 15/9£179
Wed 10/1217:55YYZ - SEA
1 stop10h 04mUnited Airlines
Sat 28/207:00SEA - YYZ
1 stop13h 59mUnited Airlines
Deal found 16/9£180
Fri 7/1109:00YYZ - SEA
1 stop16h 45mMultiple Airlines
Tue 11/1120:00SEA - YYZ
1 stop7h 29mMultiple Airlines
Deal found 16/9£181
Tue 7/1007:00YYZ - SEA
3 stops13h 53mUnited Airlines
Tue 21/1013:57SEA - YYZ
1 stop7h 01mUnited Airlines
Deal found 16/9£183
Tue 9/1208:55YYZ - SEA
1 stop10h 12mUnited Airlines
Wed 7/110:58SEA - YYZ
1 stop7h 23mUnited Airlines
Deal found 17/9£184
Wed 10/1217:55YYZ - SEA
1 stop10h 04mUnited Airlines
Thu 26/223:50SEA - YYZ
1 stop7h 11mUnited Airlines
Deal found 15/9£185

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 18 September 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

Sat 13/12

16:45-19:18

Nonstop5h 33m

Seattle/Tacoma Intl

Wed 25/2

08:00-15:35

Nonstop4h 35m

£160

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Thu 5/2

07:45-14:19

1 stop9h 34m

Seattle/Tacoma Intl

Mon 23/2

15:10-05:58

2 stops11h 48m

£161

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 10/12

16:45-19:18

Nonstop5h 33m

Seattle/Tacoma Intl

Mon 2/3

08:00-15:35

Nonstop4h 35m

£166

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sat 14/2

16:45-19:05

Nonstop5h 20m

Seattle/Tacoma Intl

Sun 22/2

08:00-15:35

Nonstop4h 35m

£166

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Fri 6/2

16:45-19:05

Nonstop5h 20m

Seattle/Tacoma Intl

Sat 21/2

08:00-15:35

Nonstop4h 35m

£166

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Fri 6/2

16:45-19:05

Nonstop5h 20m

Seattle/Tacoma Intl

Tue 24/2

08:00-15:35

Nonstop4h 35m

£166

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 4/2

16:45-19:05

Nonstop5h 20m

Seattle/Tacoma Intl

Fri 20/2

08:00-15:35

Nonstop4h 35m

£166

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Thu 11/12

16:45-19:18

Nonstop5h 33m

Seattle/Tacoma Intl

Mon 2/3

08:00-15:35

Nonstop4h 35m

£171

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Fri 7/11

16:45-19:05

Nonstop5h 20m

Seattle/Tacoma Intl

Thu 13/11

07:55-15:35

Nonstop4h 40m

£171

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Thu 5/2

16:45-19:05

Nonstop5h 20m

Seattle/Tacoma Intl

Sun 22/2

08:00-15:35

Nonstop4h 35m

£173

Flights are sorted by cheapest return flights first.

Deals found on 16/9

Showing 1-10 of 20 results
1
2

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 12 September 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 70 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, January is the cheapest month in which you can book a flight from Toronto Pearson Intl Airport to Seattle (average of £622). Flying from Toronto Pearson Intl Airport to Seattle in July is currently the most expensive (average of £946). 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 18 September 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 29% on flights from Toronto Pearson Intl Airport to Seattle by exploring options for tickets at midday.

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 33m. Fly via Alaska Airlines or WestJet 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: Alaska Airlines (93%), Hawaiian Airlines (93%), Air Tahiti Nui( 89%).

  • 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, January is the cheapest month in which you can book a flight from Toronto Pearson Intl Airport to Seattle (average of £622). Flying from Toronto Pearson Intl Airport to Seattle in July is currently the most expensive (average of £946). 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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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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