Cheap flights from Toronto Pearson Intl Airport to Seattle from C$ 324

YYZ — SEA
29 Nov — 6 Dec1
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 72 days in advance, depart on a Friday or Tuesday 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

Tue 15/127:30 a.m. -
1 stop9h 10m
Mon 4/12:30 p.m. -
2 stops12h 15m
Deal found 30/10C$ 476
Tue 1/127:30 a.m. -
1 stop9h 10m
Sat 5/122:20 p.m. -
2 stops12h 25m
Deal found 25/10C$ 490
Tue 8/127:30 a.m. -
1 stop9h 10m
Sat 12/122:20 p.m. -
2 stops12h 25m
Deal found 25/10C$ 494
Tue 15/127:30 a.m. -
1 stop9h 10m
Mon 11/12:30 p.m. -
2 stops12h 15m
Deal found 30/10C$ 498
Tue 15/127:30 a.m. -
1 stop9h 10m
Sun 10/12:30 p.m. -
2 stops12h 15m
Deal found 25/10C$ 499
Wed 16/127:00 a.m. -
2 stops9h 40m
Wed 13/12:30 p.m. -
2 stops12h 15m
Deal found 29/10C$ 502
Thu 3/126:10 a.m. -
1 stop10h 30m
Mon 7/122:30 p.m. -
2 stops12h 15m
Deal found 25/10C$ 503
Tue 24/117:30 a.m. -
1 stop9h 10m
Tue 1/122:30 p.m. -
2 stops12h 15m
Deal found 27/10C$ 509
Fri 27/116:10 a.m. -
1 stop10h 30m
Tue 1/122:30 p.m. -
2 stops12h 15m
Deal found 26/10C$ 510
Thu 10/126:10 a.m. -
1 stop10h 30m
Sun 13/122:30 p.m. -
2 stops12h 15m
Deal found 26/10C$ 512
Thu 26/117:30 a.m. -
1 stop9h 10m
Tue 1/122:30 p.m. -
2 stops12h 15m
Deal found 27/10C$ 513

Find flight deals from Pearson Intl to Seattle

Round-trip from

C$ 471

One-way from

C$ 324

Popular in

December

Cheapest in

February

Average price

C$ 659

Good round-trip deal

C$ 717 or less

Good one-way deal

C$ 408 or less
WestJet
  • WestJet
  • 7/1-10/1
  • 3 total stops
  • 22h 45m total
  • Toronto to Seattle
WestJet
  • WestJet
  • 17/11-31/12
  • 2 total stops
  • 18h 20m total
  • Toronto to Seattle
High demand for flights, 1% potential price rise
Cheapest flight prices on average. 2% potential price decrease (C$ 21 potential savings vs. average RT price).
Average for round-trip flights in October 2026
Price to beat on a round-trip flight from Toronto Pearson Intl to Seattle/Tacoma Intl.
Price to beat on a one-way flight from Toronto Pearson Intl to Seattle/Tacoma Intl.

Cheapflights Fare Finder

 
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 Toronto Pearson Intl - SEA Seattle/Tacoma Intl

YYZSEA

Toronto Pearson Intl

Tue 1/12

5:15 p.m.-7:56 p.m.

Nonstop5h 41m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 387

TorontoSeattle

YYZ Toronto Pearson Intl - SEA Seattle/Tacoma Intl

YYZSEA

Toronto Pearson Intl

Sat 19/12

5:15 p.m.-8:13 p.m.

Nonstop5h 58m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 387

TorontoSeattle

YYZ Toronto Pearson Intl - SEA Seattle/Tacoma Intl

YYZSEA

Toronto Pearson Intl

Sat 28/11

5:15 p.m.-7:47 p.m.

Nonstop5h 32m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 387

TorontoSeattle

YYZ Toronto Pearson Intl - SEA Seattle/Tacoma Intl

YYZSEA

Toronto Pearson Intl

Mon 21/12

5:15 p.m.-8:13 p.m.

Nonstop5h 58m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 403

TorontoSeattle

YYZ Toronto Pearson Intl - SEA Seattle/Tacoma Intl

YYZSEA

Toronto Pearson Intl

Sun 20/12

5:15 p.m.-8:13 p.m.

Nonstop5h 58m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 403

TorontoSeattle

YYZ Toronto Pearson Intl - SEA Seattle/Tacoma Intl

YYZSEA

Toronto Pearson Intl

Thu 24/12

5:15 p.m.-8:13 p.m.

Nonstop5h 58m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 403

TorontoSeattle

YYZ Toronto Pearson Intl - SEA Seattle/Tacoma Intl

YYZSEA

Toronto Pearson Intl

Fri 18/12

5:15 p.m.-8:13 p.m.

Nonstop5h 58m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 403

TorontoSeattle

YYZ Toronto Pearson Intl - SEA Seattle/Tacoma Intl

YYZSEA

Toronto Pearson Intl

Mon 7/12

5:15 p.m.-7:56 p.m.

Nonstop5h 41m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 403

TorontoSeattle

YYZ Toronto Pearson Intl - SEA Seattle/Tacoma Intl

YYZSEA

Toronto Pearson Intl

Thu 10/12

5:15 p.m.-7:56 p.m.

Nonstop5h 41m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 403
Quickest round-trip

TorontoSeattle

YYZ Toronto Pearson Intl - SEA Seattle/Tacoma Intl

YYZSEA

Toronto Pearson Intl

Mon 9/11

5:15 p.m.-7:45 p.m.

Nonstop5h 30m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 435

Flights are sorted by cheapest round-trip flights first.

Deals found on 28/10

Showing 1-10 of 21 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

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 71 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$ 326). Flying from Toronto Pearson Intl Airport to Seattle in December is currently the most expensive (average of C$ 705). 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?

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 typical for this route at the moment.

Toronto Pearson Intl Airport to Seattle flights typically cost between C$ 394 and C$ 701 in January.
The cheapest round-trip price found within the last 5 days was C$ 471 on WestJet (7 Jan-10 Jan).

Reviews of airlines servicing Seattle

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.

Boarding

8.1

Food

7.0

Comfort

7.8

Crew

8.5

Entertainment

7.0

Overall

7.9

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.

Boarding

8.1

Food

7.0

Comfort

7.8

Crew

8.5

Entertainment

7.0

Overall

7.9

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.

Boarding

8.1

Food

7.0

Comfort

7.8

Crew

8.5

Entertainment

7.0

Overall

7.9

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.

Boarding

8.1

Food

7.0

Comfort

7.8

Crew

8.5

Entertainment

7.0

Overall

7.9

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.

Boarding

8.1

Food

7.0

Comfort

7.8

Crew

8.5

Entertainment

7.0

Overall

7.9

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.

Boarding

8.1

Food

7.0

Comfort

7.8

Crew

8.5

Entertainment

7.0

Overall

7.9

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

  • 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 5h 58m. Fly via Delta or Alaska 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$ 226), Alaska Airlines (C$ 271), and WestJet (C$ 299) offers the cheapest pricing from Toronto Pearson Intl Airport to Seattle. Delta is 58% 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$ 197), and Air Canada (C$ 230).

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

    Consider Qatar Airways (100%), Alaska Airlines (83%) or Brussels Airlines (44%) 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$ 329. On average you can expect to pay C$ 727. The most popular route, (Toronto Pearson Intl - Seattle/Tacoma Intl), can usually be booked for C$ 552.

  • 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$ 326). Flying from Toronto Pearson Intl Airport to Seattle in December is currently the most expensive (average of C$ 705). 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.

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Fly from Pearson Intl to Seattle on these airlines

Top 5 airlines flying from Pearson Intl to Seattle

AirlineCheapestAverageFlexibilityOn-time
DeltaCheapestC$ 226AverageC$ 568FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Alaska AirlinesCheapestC$ 271AverageC$ 487FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
WestJetCheapestC$ 299AverageC$ 470FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Air CanadaCheapestC$ 299AverageC$ 668FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 374AverageC$ 774FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

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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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