Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from Toronto Pearson Intl Airport to Seattle from C$ 286

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 18/9. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — SEA
29 Aug — 5 Sep1
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 30 July 2026.

Fri 2/1010:20 p.m.
YYZ
-
SEA
2 stops23h 25m
WestJet
Mon 12/107:35 p.m.
SEA
-
YYZ
1 stop7h 10m
WestJet
Deal found 28/7C$ 480
Sat 19/912:40 p.m.
YYZ
-
SEA
2 stops9h 05m
WestJet
Sat 26/97:35 p.m.
SEA
-
YYZ
1 stop8h 20m
WestJet
Deal found 27/7C$ 482
Wed 2/93:50 p.m.
YYZ
-
SEA
1 stop8h 10m
WestJet
Sun 6/97:35 p.m.
SEA
-
YYZ
1 stop8h 20m
WestJet
Deal found 27/7C$ 483
Fri 18/98:00 p.m.
YYZ
-
SEA
1 stop25h 45m
WestJet
Mon 21/97:35 p.m.
SEA
-
YYZ
1 stop7h 10m
WestJet
Deal found 27/7C$ 484
Wed 19/82:50 p.m.
YYZ
-
SEA
1 stop21h 50m
WestJet
Mon 24/87:00 a.m.
SEA
-
YYZ
2 stops11h 10m
WestJet
Deal found 27/7C$ 486
Sun 25/105:00 p.m.
YYZ
-
SEA
1 stop24h 20m
WestJet
Fri 30/103:10 p.m.
SEA
-
YYZ
1 stop25h 28m
WestJet
Deal found 26/7C$ 487
Thu 20/812:00 p.m.
YYZ
-
SEA
1 stop9h 45m
WestJet
Tue 25/810:30 a.m.
SEA
-
YYZ
2 stops10h 29m
WestJet
Deal found 26/7C$ 489
Tue 1/99:00 a.m.
YYZ
-
SEA
1 stop27h 40m
WestJet
Wed 9/910:30 a.m.
SEA
-
YYZ
1 stop7h 45m
WestJet
Deal found 25/7C$ 490
Thu 20/812:00 p.m.
YYZ
-
SEA
1 stop9h 45m
WestJet
Sun 23/810:30 a.m.
SEA
-
YYZ
1 stop9h 15m
WestJet
Deal found 26/7C$ 493
Fri 18/910:20 p.m.
YYZ
-
SEA
2 stops23h 25m
WestJet
Tue 22/97:35 p.m.
SEA
-
YYZ
1 stop8h 20m
WestJet
Deal found 27/7C$ 496

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 30 July 2026.

Round-trip from

C$ 480

One-way from

C$ 286

Popular in

August

Cheapest in

February

Average price

C$ 634

Good round-trip deal

C$ 787 or less

Good one-way deal

C$ 375 or less
WestJet
  • WestJet
  • 2/10-12/10
  • 3 total stops
  • 30h 35m total
  • Toronto to Seattle
Search Deals
18/9
  • 18/9
  • 1 total stop
  • 16h 07m total
  • Toronto to Seattle
Search Deals
Highest demand for flights based on searches. 16% potential increase in price (C$ 132 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 20 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 30 July 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

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Fri 11/9

7:24 p.m.-11:55 p.m.

1 stop7h 31m

Seattle/Tacoma Intl

Mon 14/9

8:59 p.m.-8:53 a.m.

2 stops8h 54m

C$ 589

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 7/10

11:00 a.m.-8:37 p.m.

2 stops12h 37m

Seattle/Tacoma Intl

Wed 7/10

11:13 p.m.-9:54 a.m.

1 stop7h 41m

C$ 620

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sat 29/8

8:50 a.m.-10:43 p.m.

1 stop16h 53m

Seattle/Tacoma Intl

Tue 8/9

5:13 p.m.-9:54 a.m.

1 stop13h 41m

C$ 627
Quickest round-trip

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sat 17/10

4:55 p.m.-7:26 p.m.

Nonstop5h 31m

Seattle/Tacoma Intl

Wed 21/10

8:00 a.m.-3:45 p.m.

Nonstop4h 45m

C$ 673

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Tue 18/8

9:00 p.m.-9:35 a.m.

1 stop15h 35m

Seattle/Tacoma Intl

Mon 24/8

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

1 stop13h 32m

C$ 707

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Thu 27/8

6:10 a.m.-10:31 a.m.

1 stop7h 21m

Seattle/Tacoma Intl

Thu 3/9

8:59 p.m.-11:19 a.m.

2 stops11h 20m

C$ 711

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Tue 15/9

6:00 a.m.-1:45 p.m.

2 stops10h 45m

Seattle/Tacoma Intl

Wed 23/9

9:30 a.m.-11:13 p.m.

2 stops10h 43m

C$ 717

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Fri 28/8

12:45 p.m.-8:45 p.m.

1 stop11h 00m

Seattle/Tacoma Intl

Sun 6/9

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

1 stop13h 32m

C$ 720

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Fri 21/8

8:55 a.m.-11:26 p.m.

2 stops17h 31m

Seattle/Tacoma Intl

Sun 23/8

10:40 a.m.-12:58 a.m.

2 stops11h 18m

C$ 822
Cheapest one-way

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Tue 25/8

7:00 a.m.-2:24 p.m.

2 stops10h 24m

C$ 355

Flights are sorted by cheapest round-trip flights first.

Deals found on 26/7

Showing 1-10 of 21 resultsSorted by cheapest first
1
2
3

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$ 334). Flying from Toronto Pearson Intl Airport to Seattle in August is currently the most expensive (average of C$ 645). 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 30 July 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?

Airfare is below average for this route at the moment.

Toronto Pearson Intl Airport to Seattle flights typically cost between C$ 491 and C$ 891 in October.
The cheapest round-trip price found within the last 5 days was C$ 480 on WestJet (2 Oct-12 Oct).

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 30 July 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
12,738 reviews
Check prices

Entertainment

7.0

Crew

8.5

Comfort

7.8

Overall

7.9

Boarding

8.1

Food

7.0

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
12,738 reviews
Alaska Airlines
7.9
Good
12,738 reviews
Check prices

Entertainment

7.0

Crew

8.5

Comfort

7.8

Overall

7.9

Boarding

8.1

Food

7.0

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
7.8
Good
8,487 reviews
Alaska Airlines
7.9
Good
12,738 reviews
Check prices

Entertainment

7.0

Crew

8.5

Comfort

7.8

Overall

7.9

Boarding

8.1

Food

7.0

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
10,051 reviews
Alaska Airlines
7.9
Good
12,738 reviews
Check prices

Entertainment

7.0

Crew

8.5

Comfort

7.8

Overall

7.9

Boarding

8.1

Food

7.0

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
3,417 reviews
Alaska Airlines
7.9
Good
12,738 reviews
Check prices

Entertainment

7.0

Crew

8.5

Comfort

7.8

Overall

7.9

Boarding

8.1

Food

7.0

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
11,412 reviews
Alaska Airlines
7.9
Good
12,738 reviews
Check prices

Entertainment

7.0

Crew

8.5

Comfort

7.8

Overall

7.9

Boarding

8.1

Food

7.0

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 3 inbound flights 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 31m. Fly via Delta or United Airlines 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, Delta (C$ 228), Alaska Airlines (C$ 274), and WestJet (C$ 275) offers the cheapest pricing from Toronto Pearson Intl Airport to Seattle. Delta is 54% 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$ 172), WestJet (C$ 187), and Delta (C$ 229).

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

    Consider Alaska Airlines (93%), Qatar Airways (67%) or Air Canada (55%) 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$ 334. On average you can expect to pay C$ 787. The most popular route, (Toronto Pearson Intl - Seattle/Tacoma Intl), can usually be booked for C$ 442.

  • 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$ 334). Flying from Toronto Pearson Intl Airport to Seattle in August is currently the most expensive (average of C$ 645). 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
Lynnwood
Ellensburg
Tukwila
Olympia
Marysville
Federal Way
Kirkland

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 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 30 July 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 30 July 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapestC$ 228AverageC$ 558FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Alaska AirlinesCheapestC$ 274AverageC$ 429FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
WestJetCheapestC$ 275AverageC$ 440FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Air CanadaCheapestC$ 286AverageC$ 610FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 377AverageC$ 773FlexibilityNo 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.

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.