Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from Toronto Pearson Intl Airport to Seattle from £127

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
19 Jul — 26 Jul1
1 adult

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 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 14 July 2025.

Round-trip from

£179

One-way from

£127

Popular in

December

Cheapest in

February

Average price

£331
WestJet
  • WestJet
  • 26/8-8/9
  • 1 total stop
  • 14h 07m total
  • Toronto to Seattle
Search Deals
United Airlines
  • United Airlines
  • 9/8
  • 2 total stops
  • 15h 14m total
  • Toronto to Seattle
Search Deals
High demand for flights, 0% potential price rise
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 July 2025
Search Deals

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 14 July 2025.

Tue 26/808:40YYZ - SEA
Nonstop5h 20mMultiple Airlines
Mon 8/907:05SEA - YYZ
1 stop8h 47mMultiple Airlines
Deal found 14/7£179
Thu 25/1207:45YYZ - SEA
1 stop9h 35mWestJet
Sat 10/115:20SEA - YYZ
2 stops11h 38mWestJet
Deal found 13/7£180
Sat 4/1007:00YYZ - SEA
3 stops14h 02mUnited Airlines
Mon 6/1023:40SEA - YYZ
1 stop9h 09mUnited Airlines
Deal found 14/7£191
Wed 17/916:45YYZ - SEA
Nonstop5h 23mAlaska Airlines
Wed 24/907:16SEA - YYZ
Nonstop4h 44mAlaska Airlines
Deal found 14/7£202
Thu 28/808:40YYZ - SEA
Nonstop5h 20mAir Canada
Thu 4/912:00SEA - YYZ
Nonstop4h 44mAir Canada
Deal found 13/7£229
Fri 1/813:30YYZ - SEA
1 stop8h 08mDelta
Wed 13/819:35SEA - YYZ
1 stop7h 37mDelta
Deal found 14/7£250

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 14 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

Tue 26/8

08:40-11:00

Nonstop5h 20m

Seattle/Tacoma Intl

Mon 8/9

07:05-18:52

1 stop8h 47m

£179

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Thu 25/12

07:45-14:20

1 stop9h 35m

Seattle/Tacoma Intl

Sat 10/1

15:20-05:58

2 stops11h 38m

£180

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sat 4/10

07:00-18:02

3 stops14h 02m

Seattle/Tacoma Intl

Mon 6/10

23:40-11:49

1 stop9h 09m

£191

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 17/9

16:45-19:08

Nonstop5h 23m

Seattle/Tacoma Intl

Wed 24/9

07:16-15:00

Nonstop4h 44m

£202

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Thu 28/8

08:40-11:00

Nonstop5h 20m

Seattle/Tacoma Intl

Thu 4/9

12:00-19:44

Nonstop4h 44m

£229

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Fri 1/8

13:30-18:38

1 stop8h 08m

Seattle/Tacoma Intl

Wed 13/8

19:35-06:12

1 stop7h 37m

£250

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sat 9/8

19:47-08:01

2 stops15h 14m

£127

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sun 14/9

22:20-12:59

2 stops17h 39m

£128

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Tue 23/9

16:45-19:08

Nonstop5h 23m

£136

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Fri 25/7

12:00-18:55

1 stop9h 55m

£150

Flights are sorted by cheapest return flights first.

Deals found on 12/7

Showing 1-10 of 12 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 11 July 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 14 July 2025.

Unlike at midday, when flights are generally more expensive, you can save up to 49% 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 14 July 2025.

The most flights from YYZ to SEA are scheduled on a Sunday (6 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (3 on average).

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

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 14 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

Comfort

7.8

Entertainment

7.1

Food

7.1

Overall

8.0

Crew

8.5

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.
Alaska Airlines
8.0
Very Good
10,000 reviews
Alaska Airlines
8.0
Very Good
10,000 reviews
Check prices

Comfort

7.8

Entertainment

7.1

Food

7.1

Overall

8.0

Crew

8.5

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.
Delta
8.0
Very Good
7,956 reviews
Alaska Airlines
8.0
Very Good
10,000 reviews
Check prices

Comfort

7.8

Entertainment

7.1

Food

7.1

Overall

8.0

Crew

8.5

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.
United Airlines
7.4
Good
8,858 reviews
Alaska Airlines
8.0
Very Good
10,000 reviews
Check prices

Comfort

7.8

Entertainment

7.1

Food

7.1

Overall

8.0

Crew

8.5

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.
WestJet
7.2
Good
2,939 reviews
Alaska Airlines
8.0
Very Good
10,000 reviews
Check prices

Comfort

7.8

Entertainment

7.1

Food

7.1

Overall

8.0

Crew

8.5

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.
Air Canada
7.1
Good
9,725 reviews
Alaska Airlines
8.0
Very Good
10,000 reviews
Check prices

Comfort

7.8

Entertainment

7.1

Food

7.1

Overall

8.0

Crew

8.5

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.

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.

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

    WestJet, at £180, 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 32% 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 United Airlines. According to our data, you can fly for as low as £127. Users have also found prices from £128 and £136 on WestJet and Alaska 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: 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 Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
Leavenworth
Bothell
SeaTac

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Pearson Intl to Seattle?

Cheapflights makes it easy to find Pearson Intl to Seattle flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

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

Cheapflights simply makes it quick and affordable to book flights from Pearson Intl to Seattle by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
Site
©2025 Cheapflights