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Cheap flights from Toronto Pearson Intl Airport to Seattle from C$ 245

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 10/9. 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
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Toronto Pearson Intl to Seattle/Tacoma Intl are usually found in February or January, booked 86 days in advance, depart on a Thursday or Friday and return on a Thursday

Cheap 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 16 June 2026.

Thu 5/117:45 a.m.
YYZ
-
SEA
1 stop8h 35m
WestJet
Wed 11/113:10 p.m.
SEA
-
YYZ
2 stops10h 48m
WestJet
Deal found 16/6C$ 417
Fri 11/912:00 p.m.
YYZ
-
SEA
1 stop9h 45m
WestJet
Sun 20/97:35 p.m.
SEA
-
YYZ
1 stop7h 10m
WestJet
Deal found 15/6C$ 428
Fri 11/91:30 p.m.
YYZ
-
SEA
1 stop8h 15m
WestJet
Mon 21/910:30 a.m.
SEA
-
YYZ
1 stop7h 45m
WestJet
Deal found 16/6C$ 430
Sun 6/912:00 p.m.
YYZ
-
SEA
2 stops9h 45m
WestJet
Mon 14/97:35 p.m.
SEA
-
YYZ
1 stop8h 20m
WestJet
Deal found 16/6C$ 431
Fri 25/91:30 p.m.
YYZ
-
SEA
1 stop8h 15m
WestJet
Sat 3/107:35 p.m.
SEA
-
YYZ
1 stop7h 10m
WestJet
Deal found 15/6C$ 434
Fri 9/1012:00 p.m.
YYZ
-
SEA
1 stop9h 45m
WestJet
Tue 13/107:35 p.m.
SEA
-
YYZ
1 stop8h 20m
WestJet
Deal found 16/6C$ 445
Fri 9/101:30 p.m.
YYZ
-
SEA
1 stop8h 15m
WestJet
Sun 11/1010:30 a.m.
SEA
-
YYZ
1 stop9h 15m
WestJet
Deal found 16/6C$ 447
Thu 24/912:00 p.m.
YYZ
-
SEA
1 stop9h 45m
WestJet
Wed 30/97:35 p.m.
SEA
-
YYZ
2 stops20h 25m
WestJet
Deal found 16/6C$ 451
Wed 4/117:45 a.m.
YYZ
-
SEA
1 stop8h 35m
WestJet
Wed 11/113:10 p.m.
SEA
-
YYZ
2 stops10h 48m
WestJet
Deal found 16/6C$ 452
Mon 2/117:45 a.m.
YYZ
-
SEA
1 stop8h 35m
WestJet
Wed 11/113:10 p.m.
SEA
-
YYZ
2 stops10h 48m
WestJet
Deal found 16/6C$ 458

Find 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 16 June 2026.

Round-trip from

C$ 417

One-way from

C$ 245

Popular in

June

Cheapest in

February

Average price

C$ 624

Good round-trip deal

C$ 641 or less

Good one-way deal

C$ 347 or less
WestJet
  • WestJet
  • 5/11-11/11
  • 3 total stops
  • 19h 23m total
  • Toronto to Seattle
Search Deals
WestJet
  • WestJet
  • 10/9
  • 1 total stop
  • 9h 45m total
  • Toronto to Seattle
Search Deals
Highest demand for flights based on searches. 18% potential increase in price (C$ 147 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 20 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
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

 
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 16 June 2026.
Use the filters below to find and compare flights from Toronto Pearson Intl Airport to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Fri 13/11

2:50 p.m.-8:10 p.m.

1 stop8h 20m

Seattle/Tacoma Intl

Sun 15/11

7:45 a.m.-3:25 p.m.

Nonstop4h 40m

C$ 522

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Tue 8/12

2:50 p.m.-8:10 p.m.

1 stop8h 20m

Seattle/Tacoma Intl

Tue 8/12

10:45 p.m.-11:48 a.m.

1 stop10h 03m

C$ 525

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 21/10

3:53 p.m.-10:45 p.m.

1 stop9h 52m

Seattle/Tacoma Intl

Sat 24/10

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

1 stop9h 00m

C$ 533

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Tue 18/8

5:50 p.m.-10:05 p.m.

1 stop7h 15m

Seattle/Tacoma Intl

Sat 22/8

5:30 a.m.-3:20 p.m.

1 stop6h 50m

C$ 554

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 12/8

5:50 p.m.-10:05 p.m.

1 stop7h 15m

Seattle/Tacoma Intl

Thu 20/8

7:16 a.m.-9:59 p.m.

1 stop11h 43m

C$ 612

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 1/7

4:18 p.m.-8:00 a.m.

1 stop18h 42m

Seattle/Tacoma Intl

Mon 6/7

5:00 a.m.-9:32 p.m.

1 stop13h 32m

C$ 657

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sun 12/7

6:10 a.m.-10:42 p.m.

1 stop19h 32m

Seattle/Tacoma Intl

Tue 21/7

5:15 p.m.-9:54 a.m.

1 stop13h 39m

C$ 666

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Tue 18/8

2:55 p.m.-11:05 p.m.

1 stop11h 10m

Seattle/Tacoma Intl

Wed 26/8

7:08 a.m.-10:54 p.m.

2 stops12h 46m

C$ 720

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sat 27/6

11:38 a.m.-8:49 p.m.

1 stop12h 11m

Seattle/Tacoma Intl

Tue 7/7

8:35 a.m.-11:58 p.m.

1 stop12h 23m

C$ 749

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sun 16/8

7:00 a.m.-4:07 p.m.

1 stop12h 07m

Seattle/Tacoma Intl

Sun 23/8

11:59 p.m.-10:36 p.m.

1 stop19h 37m

C$ 760

Flights are sorted by cheapest round-trip flights first.

Deals found on 16/6

Showing 1-10 of 23 resultsSorted by cheapest first
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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?

Booking 85 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, February is the cheapest month in which you can book a flight from Toronto Pearson Intl Airport to Seattle (average of C$ 332). Flying from Toronto Pearson Intl Airport to Seattle in June is currently the most expensive (average of C$ 624). 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 16 June 2026.

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 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 16 June 2026.
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
7.9
Good
12,523 reviews
Check prices

Crew

8.5

Entertainment

7.0

Comfort

7.8

Overall

7.9

Boarding

8.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

LHR - SEA

It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.
Alaska Airlines
7.9
Good
12,523 reviews
Alaska Airlines
7.9
Good
12,523 reviews
Check prices

Crew

8.5

Entertainment

7.0

Comfort

7.8

Overall

7.9

Boarding

8.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

LHR - SEA

It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.
Delta
7.9
Good
8,403 reviews
Alaska Airlines
7.9
Good
12,523 reviews
Check prices

Crew

8.5

Entertainment

7.0

Comfort

7.8

Overall

7.9

Boarding

8.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

LHR - SEA

It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.
United Airlines
7.4
Good
9,842 reviews
Alaska Airlines
7.9
Good
12,523 reviews
Check prices

Crew

8.5

Entertainment

7.0

Comfort

7.8

Overall

7.9

Boarding

8.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

LHR - SEA

It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.
WestJet
7.2
Good
3,365 reviews
Alaska Airlines
7.9
Good
12,523 reviews
Check prices

Crew

8.5

Entertainment

7.0

Comfort

7.8

Overall

7.9

Boarding

8.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

LHR - SEA

It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.
Air Canada
7.1
Good
11,197 reviews
Alaska Airlines
7.9
Good
12,523 reviews
Check prices

Crew

8.5

Entertainment

7.0

Comfort

7.8

Overall

7.9

Boarding

8.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

LHR - SEA

It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.

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 1 inbound flight from Toronto Pearson Intl per day. You should also have plenty of airline options to choose from since 5 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 7h 15m. Fly via United Airlines or Delta to get the fastest option. Toronto Pearson Intl Airport and Seattle are separated by a distance of 3306 km. This flight may include one or multiple stops.

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

    According to our current data, Alaska Airlines (C$ 273), WestJet (C$ 274), and Air Canada (C$ 281) offers the cheapest pricing from Toronto Pearson Intl Airport to Seattle. Alaska Airlines is 42% cheaper than the average price of flights available within the next 90 days to this destination.

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

    The cheapest airlines for a one-way flight from Toronto Pearson Intl Airport to Seattle are Alaska Airlines (C$ 171), WestJet (C$ 180), and Air Canada (C$ 212).

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

    Consider Hawaiian Airlines (100%), Alaska Airlines (95%) or Qatar Airways (67%) 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$ 254. On average you can expect to pay C$ 659. The most popular route, (Toronto Pearson Intl - Seattle/Tacoma Intl), can usually be booked for C$ 484.

  • 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, February is the cheapest month in which you can book a flight from Toronto Pearson Intl Airport to Seattle (average of C$ 332). Flying from Toronto Pearson Intl Airport to Seattle in June is currently the most expensive (average of C$ 624). 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
SeaTac
Kent
Leavenworth
Mukilteo
Tacoma
Renton
Cashmere
Tukwila
Olympia
Marysville
Kirkland

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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 16 June 2026.
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 5 airlines flying from Pearson Intl to Seattle

Discover the top 5 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 16 June 2026.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapestC$ 273AverageC$ 433FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
WestJetCheapestC$ 274AverageC$ 374FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Air CanadaCheapestC$ 281AverageC$ 591FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
DeltaCheapestC$ 282AverageC$ 523FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
United AirlinesCheapestC$ 375AverageC$ 742FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers 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?

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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