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Cheap flights from Toronto Pearson Intl Airport to Seattle from C$ 210

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
17 Oct — 24 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 Thursday or Wednesday and return on a Wednesday

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 17 September 2025.

Round-trip from

C$ 289

One-way from

C$ 210

Popular in

July

Cheapest in

February

Average price

C$ 509

Good round-trip deal

C$ 492 or less

Good one-way deal

C$ 429 or less
WestJet
  • WestJet
  • 24/10-1/11
  • 4 total stops
  • 24h 59m 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 (C$ 122 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 17 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Toronto Pearson Intl to Seattle/Tacoma Intl.
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Price to beat on a one-way flight from Toronto Pearson Intl to Seattle/Tacoma Intl.
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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 17 September 2025.

Fri 24/109:00 a.m.YYZ - SEA
2 stops13h 21mWestJet
Sat 1/113:20 p.m.SEA - YYZ
2 stops11h 38mWestJet
Deal found 17/9C$ 289
Sat 25/108:00 a.m.YYZ - SEA
1 stop7h 59mWestJet
Sat 1/113:20 p.m.SEA - YYZ
2 stops11h 38mWestJet
Deal found 17/9C$ 290
Fri 3/106:45 a.m.YYZ - SEA
1 stop8h 50mWestJet
Sat 11/101:50 p.m.SEA - YYZ
1 stop7h 32mWestJet
Deal found 16/9C$ 293
Wed 10/127:45 a.m.YYZ - SEA
1 stop9h 35mWestJet
Fri 27/23:10 p.m.SEA - YYZ
1 stop20h 48mWestJet
Deal found 16/9C$ 294
Wed 10/124:45 p.m.YYZ - SEA
Nonstop5h 33mAlaska Airlines
Wed 25/28:00 a.m.SEA - YYZ
Nonstop4h 35mAlaska Airlines
Deal found 16/9C$ 299
Sun 5/106:45 a.m.YYZ - SEA
1 stop8h 50mWestJet
Tue 7/107:05 a.m.SEA - YYZ
1 stop7h 17mWestJet
Deal found 16/9C$ 300
Sat 13/124:45 p.m.YYZ - SEA
Nonstop5h 33mAlaska Airlines
Wed 25/28:00 a.m.SEA - YYZ
Nonstop4h 35mAlaska Airlines
Deal found 17/9C$ 301
Fri 3/106:45 a.m.YYZ - SEA
1 stop8h 50mWestJet
Wed 8/108:40 a.m.SEA - YYZ
1 stop12h 42mWestJet
Deal found 16/9C$ 303
Wed 22/106:30 a.m.YYZ - SEA
1 stop9h 29mWestJet
Thu 30/103:10 p.m.SEA - YYZ
2 stops18h 13mWestJet
Deal found 16/9C$ 307
Fri 3/106:45 a.m.YYZ - SEA
1 stop8h 50mWestJet
Sun 5/108:40 a.m.SEA - YYZ
2 stops12h 51mWestJet
Deal found 16/9C$ 308

Cheapflights Fare Finder

 
Customize 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 629,999 searches. Data last updated 17 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

Tue 7/10

7:00 a.m.-5:53 p.m.

3 stops13h 53m

Seattle/Tacoma Intl

Tue 7/10

10:35 p.m.-9:58 a.m.

1 stop8h 23m

C$ 333

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sat 1/11

6:50 a.m.-9:13 p.m.

2 stops17h 23m

Seattle/Tacoma Intl

Sat 1/11

11:50 p.m.-11:48 a.m.

1 stop9h 58m

C$ 337

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 8/10

7:30 a.m.-10:17 p.m.

1 stop17h 47m

Seattle/Tacoma Intl

Mon 20/10

2:55 p.m.-1:06 a.m.

1 stop7h 11m

C$ 338

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Tue 21/10

2:45 p.m.-10:30 p.m.

1 stop10h 45m

Seattle/Tacoma Intl

Mon 27/10

11:59 p.m.-2:01 p.m.

1 stop11h 02m

C$ 344

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Mon 27/10

9:00 p.m.-9:50 a.m.

1 stop15h 50m

Seattle/Tacoma Intl

Wed 5/11

7:00 a.m.-11:59 p.m.

1 stop13h 59m

C$ 344

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Tue 4/11

6:50 a.m.-11:28 a.m.

1 stop7h 38m

Seattle/Tacoma Intl

Mon 10/11

11:59 p.m.-2:01 p.m.

1 stop11h 02m

C$ 344

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Tue 14/10

6:10 a.m.-11:15 p.m.

1 stop20h 05m

Seattle/Tacoma Intl

Mon 20/10

11:40 p.m.-9:58 a.m.

1 stop7h 18m

C$ 344

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Fri 17/10

1:00 p.m.-6:49 p.m.

1 stop8h 49m

Seattle/Tacoma Intl

Sat 25/10

1:57 p.m.-11:58 p.m.

1 stop7h 01m

C$ 344

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Thu 9/10

10:15 a.m.-11:29 p.m.

1 stop16h 14m

Seattle/Tacoma Intl

Tue 14/10

5:00 a.m.-10:48 p.m.

1 stop14h 48m

C$ 344

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Mon 2/3

3:00 p.m.-10:29 p.m.

1 stop10h 29m

Seattle/Tacoma Intl

Tue 3/3

11:50 p.m.-1:30 p.m.

1 stop10h 40m

C$ 344

Flights are sorted by cheapest round-trip flights first.

Deals found on 15/9

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 round-trip 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 round-trip flight from Pearson Intl to Seattle. Price data was last updated on 12 September 2025.

Booking 70 days in advance of your planned departure date is, on average, the best time to get cheap flights from Toronto Pearson Intl Airport to Seattle. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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 C$ 262). Flying from Toronto Pearson Intl Airport to Seattle in December is currently the most expensive (average of C$ 353). 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 17 September 2025.

It’s optimal to fly from Toronto Pearson Intl Airport to Seattle in the evening. By choosing this option you can save up to 48% on the cost of your flight, compared to a flight in the morning.

What is the cheapest day to fly from Toronto Pearson Intl Airport to Seattle?

Use this chart to determine the cheapest time to fly round-trip from Pearson Intl to Seattle. Price data was last updated on 14 September 2025.

Travelers seeking maximum savings on their Toronto Pearson Intl Airport to Seattle flight should consider departing on Friday evenings when fares are most often at their lowest. Monday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

How much does it cost to fly round-trip 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 17 September 2025.
Read reviews from past customers who have flown 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

Entertainment

7.1

Food

7.1

Comfort

7.8

Overall

8.0

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Entertainment

7.1

Food

7.1

Comfort

7.8

Overall

8.0

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
Delta
8.0
Very good
7,961 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Entertainment

7.1

Food

7.1

Comfort

7.8

Overall

8.0

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
United Airlines
7.4
Good
8,926 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Entertainment

7.1

Food

7.1

Comfort

7.8

Overall

8.0

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
WestJet
7.2
Good
3,095 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Entertainment

7.1

Food

7.1

Comfort

7.8

Overall

8.0

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
Air Canada
7.1
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Entertainment

7.1

Food

7.1

Comfort

7.8

Overall

8.0

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why

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?

    Seattle/Tacoma Intl (SEA) is the airport you will fly into if you book a flight from Toronto Pearson Intl to Seattle. You should not have trouble finding flights to Seattle/Tacoma Intl from Toronto Pearson Intl; the airport handles an average of 4 inbound flights from Toronto Pearson Intl per day. You should also have plenty of airline options to choose from since 6 airlines have flights to the Seattle airport from Toronto Pearson Intl. It is only a 18.4 km journey from Seattle/Tacoma Intl (SEA) to Seattle’s city centre.

  • 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 13h 53m. Fly via United Airlines to get the fastest option. Toronto Pearson Intl Airport and Seattle are separated by a distance of 3306 km.

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

    According to our current data, WestJet (C$ 289), Alaska Airlines (C$ 321), and Air Canada (C$ 342) offers the cheapest pricing from Toronto Pearson Intl Airport to Seattle. WestJet is 41% cheaper than the average price of flights available within the next 90 days to this destination.

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

    Consider Alaska Airlines (93%), Hawaiian Airlines (93%) or Air Tahiti Nui (89%) when booking your flight. These represent the most reliable airlines when flying from Toronto Pearson Intl Airport to Seattle.

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

    The cheapest flight price from Toronto Pearson Intl Airport to Seattle is C$ 250. On average you can expect to pay C$ 730. The most popular route, (Toronto Pearson Intl - Seattle/Tacoma Intl), can usually be booked for C$ 289.

  • 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 vacation 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 C$ 262). Flying from Toronto Pearson Intl Airport to Seattle in December is currently the most expensive (average of C$ 353). 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
Leavenworth
SeaTac
Tukwila
Tacoma
Bothell
Cashmere
Renton
Olympia
Marysville
Lynnwood

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Fly from Pearson Intl to Seattle on these airlines

Choose from the following airlines for your flight from Pearson Intl to Seattle. Flights are based on user searches made on Cheapflights and were last updated on 17 September 2025.
Air Canada flights from Toronto Pearson Intl to Seattle/Tacoma Intl
WestJet flights from Toronto Pearson Intl to Seattle/Tacoma Intl
United Airlines flights from Toronto Pearson Intl to Seattle/Tacoma Intl

Top 6 airlines flying from Pearson Intl to Seattle

Discover the top 6 airlines that operate flights from Pearson Intl to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 17 September 2025.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 289AverageC$ 382FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Alaska AirlinesCheapestC$ 321AverageC$ 515FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
Air CanadaCheapestC$ 342AverageC$ 615FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 367AverageC$ 640FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
DeltaCheapestC$ 376AverageC$ 499FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Hawaiian AirlinesCheapestC$ 409AverageC$ 462FlexibilityNo cancel feeOn-time85%
Search Hawaiian Airlines flights

Fly with Cheapflights

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

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Seattle from Pearson Intl today with Cheapflights!

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

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Seattle from Pearson Intl.

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

Certainly. Search results for flights to Seattle from Pearson Intl shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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

Yes, Cheapflights offers price alerts on Pearson Intl to Seattle flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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