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Cheap flights from Toronto Pearson Intl Airport to Seattle from £134

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 9/8. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — SEA
16 Jul — 23 Jul1
1 adult

Cheapflights Tip: The best prices from Toronto Pearson Intl to Seattle/Tacoma Intl are usually found in February or January, booked 42 days in advance, depart on a Monday or Thursday 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 11 July 2025.

Round-trip from

£182

One-way from

£134

Popular in

December

Cheapest in

February

Average price

£322
WestJet
  • WestJet
  • 15/8-24/8
  • 2 total stops
  • 17h 35m total
  • Toronto to Seattle
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WestJet
  • WestJet
  • 9/8
  • 2 total stops
  • 15h 36m total
  • Toronto to Seattle
Search Deals
High demand for flights, 0% potential price rise
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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 July 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 11 July 2025.

Fri 15/813:30YYZ - SEA
1 stop9h 58mWestJet
Sun 24/819:35SEA - YYZ
1 stop7h 37mWestJet
Deal found 9/7£182
Sat 25/1010:05YYZ - SEA
1 stop13h 39mUnited Airlines
Mon 3/1123:50SEA - YYZ
1 stop7h 05mUnited Airlines
Deal found 9/7£185
Wed 17/916:45YYZ - SEA
Nonstop5h 23mAlaska Airlines
Tue 23/907:16SEA - YYZ
Nonstop4h 44mAlaska Airlines
Deal found 10/7£200
Tue 29/706:15YYZ - SEA
1 stop13h 00mDelta
Fri 1/821:30SEA - YYZ
1 stop11h 35mDelta
Deal found 8/7£232

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 11 July 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

Fri 15/8

13:30-20:28

1 stop9h 58m

Seattle/Tacoma Intl

Sun 24/8

19:35-06:12

1 stop7h 37m

£182

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sat 25/10

10:05-20:44

1 stop13h 39m

Seattle/Tacoma Intl

Mon 3/11

23:50-09:55

1 stop7h 05m

£185

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 17/9

16:45-19:08

Nonstop5h 23m

Seattle/Tacoma Intl

Tue 23/9

07:16-15:00

Nonstop4h 44m

£200

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Tue 29/7

06:15-16:15

1 stop13h 00m

Seattle/Tacoma Intl

Fri 1/8

21:30-12:05

1 stop11h 35m

£232

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sat 9/8

06:45-19:21

2 stops15h 36m

£134

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 24/9

16:45-19:08

Nonstop5h 23m

£135

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sun 10/8

08:00-12:58

1 stop7h 58m

£144

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Fri 12/9

00:30-18:36

2 stops21h 06m

£150

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sun 14/9

07:00-20:29

3 stops16h 29m

£164

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Fri 19/12

19:30-21:56

Nonstop5h 26m

£185

Flights are sorted by cheapest return flights first.

Deals found on 9/7

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 27 June 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 42 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 11 July 2025.

Unlike at midday, when flights are generally more expensive, you can save up to 50% on flights from Toronto Pearson Intl Airport to Seattle by exploring options for tickets in the afternoon.

Weekly flight availability from Toronto Pearson Intl Airport to Seattle

Explore weekly flight availability from Pearson Intl to Seattle. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 11 July 2025.

The most flights from YYZ to SEA are scheduled on a Thursday (5 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (3 on average).

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated 11 July 2025.
Read reviews from past customers who have flown with Alaska Airlines, Delta, andUnited Airlines from Toronto Pearson Intl Airport to Seattle. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very Good
10,000 reviews
Check prices

Food

7.1

Overall

8.0

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Alaska Airlines
8.0
Very Good
10,000 reviews
Alaska Airlines
8.0
Very Good
10,000 reviews
Check prices

Food

7.1

Overall

8.0

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Delta
8.0
Very Good
7,951 reviews
Alaska Airlines
8.0
Very Good
10,000 reviews
Check prices

Food

7.1

Overall

8.0

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
United Airlines
7.4
Good
8,846 reviews
Alaska Airlines
8.0
Very Good
10,000 reviews
Check prices

Food

7.1

Overall

8.0

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
WestJet
7.2
Good
2,927 reviews
Alaska Airlines
8.0
Very Good
10,000 reviews
Check prices

Food

7.1

Overall

8.0

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Air Canada
7.1
Good
9,696 reviews
Alaska Airlines
8.0
Very Good
10,000 reviews
Check prices

Food

7.1

Overall

8.0

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

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.

  • What are the cheapest airlines flying from Toronto Pearson Intl Airport to Seattle round-trip?

    WestJet, at £182, was found to be the cheapest airline from Toronto Pearson Intl Airport to Seattle.Alternate airlines flying return to your destination include United Airlines and Alaska Airlines. WestJet is currently priced 31% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from Toronto Pearson Intl Airport to Seattle one-way?

    For one-way options, check prices for WestJet. According to our data, you can fly for as low as £134. Users have also found prices from £135 and £144 on Alaska Airlines and Delta, 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: Alaska Airlines (93%), Hawaiian Airlines (93%), Air Tahiti Nui( 88%).

  • 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 Toronto Pearson Intl Airport?

Book flights to Toronto Pearson Intl Airport if you plan to visit one of these locations
Tacoma
Leavenworth
Bothell
SeaTac

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