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Cheap flights from Toronto to Seattle from C$ 136

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 20/7. Fares are subject to change and may not be available on all flights or dates of travel.
YTO — SEA
20 Apr — 27 Apr1
1 adult

Cheapflights Tip: The best prices from Toronto to Seattle/Tacoma Intl are usually found in February or January, booked 77 days in advance, depart on a Thursday or Tuesday and return on a Thursday

Cheap flight deals from Toronto to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Toronto (YTO) 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 15 April 2025.

Round-trip from

C$ 216

One-way from

C$ 136

Popular in

July

Cheapest in

February

Average price

C$ 551

Good round-trip deal

C$ 487 or less

Good one-way deal

C$ 309 or less
WestJet
  • WestJet
  • 5/6-12/6
  • 2 total stops
  • 17h 49m total
  • Toronto to Seattle
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WestJet
  • WestJet
  • 20/7
  • 1 total stop
  • 9h 58m total
  • Toronto to Seattle
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Highest demand for flights based on searches. 10% potential increase in price (C$ 84 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease (C$ 16 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Price to beat on a round-trip flight from Toronto (YTO) to Seattle/Tacoma Intl.
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Price to beat on a one-way flight from Toronto (YTO) to Seattle/Tacoma Intl.
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Find flight deals from Toronto to Seattle

Cheapest flights from Toronto to Seattle
Explore the most affordable flight options available from Toronto to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 April 2025.

Thu 5/66:00 a.m.YHM - SEA
1 stop9h 58mWestJet
Thu 12/61:50 p.m.SEA - YHM
1 stop7h 51mWestJet
Deal found 14/4C$ 216
Sat 3/56:00 a.m.YHM - SEA
1 stop9h 58mMultiple Airlines
Tue 13/56:00 a.m.SEA - YHM
2 stops15h 41mMultiple Airlines
Deal found 13/4C$ 325
Thu 8/56:00 a.m.YKF - SEA
3 stops35h 25mMultiple Airlines
Mon 12/53:20 p.m.SEA - YKF
2 stops30h 26mMultiple Airlines
Deal found 15/4C$ 339
Wed 21/51:30 p.m.YYZ - SEA
1 stop8h 40mWestJet
Wed 28/51:50 p.m.SEA - YYZ
1 stop7h 36mWestJet
Deal found 15/4C$ 339
Tue 27/58:00 a.m.YYZ - SEA
1 stop7h 58mMultiple Airlines
Thu 29/56:00 a.m.SEA - YYZ
2 stops13h 56mMultiple Airlines
Deal found 15/4C$ 341
Wed 30/76:00 a.m.YKF - SEA
2 stops33h 31mWestJet
Thu 31/77:35 p.m.SEA - YKF
1 stop26h 11mWestJet
Deal found 13/4C$ 357
Tue 13/55:50 p.m.YYZ - SEA
1 stop9h 09mDelta
Tue 27/511:50 p.m.SEA - YYZ
1 stop8h 50mDelta
Deal found 14/4C$ 392
Wed 21/512:25 p.m.YTZ - SEA
1 stop10h 12mAir Canada
Tue 27/57:20 a.m.SEA - YTZ
1 stop9h 30mAir Canada
Deal found 13/4C$ 398
Fri 2/54:45 p.m.YYZ - SEA
Nonstop5h 14mAlaska Airlines
Wed 14/57:15 a.m.SEA - YYZ
Nonstop4h 45mAlaska Airlines
Deal found 15/4C$ 398
Thu 1/512:00 p.m.YYZ - SEA
1 stop10h 37mAir Canada
Thu 8/510:00 a.m.SEA - YYZ
1 stop7h 32mAir Canada
Deal found 13/4C$ 406
Fri 2/57:00 a.m.YTZ - SEA
2 stops15h 51mMultiple Airlines
Wed 7/53:20 p.m.SEA - YTZ
2 stops17h 27mMultiple Airlines
Deal found 15/4C$ 423
Fri 29/88:50 a.m.YYZ - SEA
Nonstop5h 20mUnited Airlines
Tue 9/97:05 a.m.SEA - YYZ
2 stops13h 53mUnited Airlines
Deal found 15/4C$ 427

Cheapflights Fare Finder

Customize your flight search to find flights from Toronto 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 15 April 2025.
Use the filters below to find and compare flights from Toronto to Seattle that are best for you.

Fly from

Toronto

Fly to

Seattle

Route

Depart

Return

Price

HamiltonSeattle

YHM - SEA

YHMSEA

Hamilton

Thu 5/6

6:00 a.m.-12:58 p.m.

1 stop9h 58m

Seattle/Tacoma Intl

Thu 12/6

1:50 p.m.-12:41 a.m.

1 stop7h 51m

C$ 216

HamiltonSeattle

YHM - SEA

YHMSEA

Hamilton

Sat 3/5

6:00 a.m.-12:58 p.m.

1 stop9h 58m

Seattle/Tacoma Intl

Tue 13/5

6:00 a.m.-12:41 a.m.

2 stops15h 41m

C$ 325

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Thu 8/5

6:00 a.m.-2:25 p.m.

3 stops35h 25m

Seattle/Tacoma Intl

Mon 12/5

3:20 p.m.-12:46 a.m.

2 stops30h 26m

C$ 339

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 21/5

1:30 p.m.-7:10 p.m.

1 stop8h 40m

Seattle/Tacoma Intl

Wed 28/5

1:50 p.m.-12:26 a.m.

1 stop7h 36m

C$ 339

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Tue 27/5

8:00 a.m.-12:58 p.m.

1 stop7h 58m

Seattle/Tacoma Intl

Thu 29/5

6:00 a.m.-10:56 p.m.

2 stops13h 56m

C$ 341

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Wed 30/7

6:00 a.m.-12:31 p.m.

2 stops33h 31m

Seattle/Tacoma Intl

Thu 31/7

7:35 p.m.-12:46 a.m.

1 stop26h 11m

C$ 357

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Tue 13/5

5:50 p.m.-11:59 p.m.

1 stop9h 09m

Seattle/Tacoma Intl

Tue 27/5

11:50 p.m.-11:40 a.m.

1 stop8h 50m

C$ 392

TorontoSeattle

YTZ - SEA

YTZSEA

Toronto Island

Wed 21/5

12:25 p.m.-7:37 p.m.

1 stop10h 12m

Seattle/Tacoma Intl

Tue 27/5

7:20 a.m.-7:50 p.m.

1 stop9h 30m

C$ 398

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Fri 2/5

4:45 p.m.-6:59 p.m.

Nonstop5h 14m

Seattle/Tacoma Intl

Wed 14/5

7:15 a.m.-3:00 p.m.

Nonstop4h 45m

C$ 398

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 3/9

12:00 p.m.-7:31 p.m.

1 stop10h 31m

Seattle/Tacoma Intl

Sat 6/9

12:20 p.m.-8:04 p.m.

Nonstop4h 44m

C$ 405

Flights are sorted by cheapest round-trip flights first.

Deals found on 14/4

Showing 1-10 of 29 results
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Best time to book a flight from Toronto to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Toronto 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 to Seattle

How far ahead should I book a flight from Toronto to Seattle?

Use this chart to determine the optimal time to book a round-trip flight from Toronto to Seattle. Price data was last updated on 11 April 2025.

Booking 77 days in advance of your planned departure date is, on average, the best time to get cheap flights from Toronto 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 to Seattle?

Currently, January is the cheapest month in which you can book a flight from Toronto to Seattle (average of C$ 261). Flying from Toronto 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 YTO to SEA?

Find hourly flight availability from Toronto 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 15 April 2025.

A simple way to save on the total cost of your ticket is to fly from Toronto to Seattle in the evening. If you’re flexible enough to do this you can expect to save up to 30% on your trip compared to booking a flight in the morning.

What is the cheapest day to fly from Toronto to Seattle?

Use this chart to determine the cheapest time to fly round-trip from Toronto to Seattle. Price data was last updated on 16 December 2024.

Travelers seeking maximum savings on their Toronto to Seattle flight should consider departing on Tuesday at noon 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.

Weekly flight availability from Toronto to Seattle

Explore weekly flight availability from Toronto 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 15 April 2025.

The most flights from YTO to SEA are scheduled on a Monday (5 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (2 on average).

Rainfall in Seattle by month

Plan your trip to Seattle by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Seattle ranges from 18.0 - 168.0 mm per month. November is typically the wettest month, when rainfall can reach 168.0 mm. July is typically the driest time to visit Seattle when rainfall is around 18.0 mm.

Temperature in Seattle by month

Plan your trip to Seattle by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Seattle, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 19.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 5.0 C).

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 15 April 2025.
Get a feel of what it's like to fly with Alaska Airlines, Delta and Hawaiian Airlines from Toronto to Seattle by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,876 reviews
Check prices

Crew

8.5

Entertainment

7.1

Comfort

7.9

Overall

8.0

Boarding

8.2

Food

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Alaska Airlines
8.0
Very good
9,876 reviews
Alaska Airlines
8.0
Very good
9,876 reviews
Check prices

Crew

8.5

Entertainment

7.1

Comfort

7.9

Overall

8.0

Boarding

8.2

Food

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Delta
8.0
Very good
7,917 reviews
Alaska Airlines
8.0
Very good
9,876 reviews
Check prices

Crew

8.5

Entertainment

7.1

Comfort

7.9

Overall

8.0

Boarding

8.2

Food

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Hawaiian Airlines
7.9
Good
2,374 reviews
Alaska Airlines
8.0
Very good
9,876 reviews
Check prices

Crew

8.5

Entertainment

7.1

Comfort

7.9

Overall

8.0

Boarding

8.2

Food

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
United Airlines
7.4
Good
8,658 reviews
Alaska Airlines
8.0
Very good
9,876 reviews
Check prices

Crew

8.5

Entertainment

7.1

Comfort

7.9

Overall

8.0

Boarding

8.2

Food

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
9,876 reviews
Check prices

Crew

8.5

Entertainment

7.1

Comfort

7.9

Overall

8.0

Boarding

8.2

Food

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Related info for your journey

Find useful and relevant information for your journey from Toronto 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?

    For a flight from Toronto to Seattle, you will be flying into Seattle/Tacoma Intl. Seattle/Tacoma Intl (SEA) is just 18.4 km from the centre of the city. Seattle/Tacoma Intl is the only Seattle airport and it handles 4 inbound flights from Toronto per day. 7 airlines have flights to Seattle/Tacoma Intl from Toronto on a regular basis.

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

    According to our current data, WestJet (C$ 216), Delta (C$ 392), and Air Canada (C$ 398) offers the cheapest pricing from Toronto to Seattle. These flights start at 58% lower than the current average price 3 months from now.

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

    For one-way options, check prices for WestJet. According to our data, you can fly for as low as C$ 136. Users have also found prices from C$ 238 and C$ 248 on Air Canada and Alaska Airlines, respectively.

  • What are the most popular routes from Toronto to Seattle?

    While some choose either Hamilton - Seattle/Tacoma Intl or Toronto Region of Waterloo Intl - Seattle/Tacoma Intl, Toronto Pearson Intl - Seattle/Tacoma Intl is the most popular route from Toronto to Seattle.

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

    The top 3 most reliable airlines when flying from Toronto to Seattle are Air Tahiti Nui (99%), Alaska Airlines (85%) and Hawaiian Airlines (85%).

  • What are the cheapest flights from Toronto to Seattle?

    Looking at all options, your cheapest flight can be booked for C$ 241. While the most popular route (Toronto Pearson Intl - Seattle/Tacoma Intl) can be booked for C$ 324 on average our data indicates C$ 1,345 when flying from Toronto to Seattle.

  • Can I find deals for flights from Toronto to Seattle that include hotel bookings?

    Yes. In addition to deals on Toronto to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Toronto to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Toronto to Seattle.

  • Can I find deals for business class flights from Toronto to Seattle?

    Yes. Cheapflights offers flight deals from Toronto 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 to Seattle?

    Currently, January is the cheapest month in which you can book a flight from Toronto to Seattle (average of C$ 261). Flying from Toronto 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 Toronto?

Book flights to Toronto if you plan to visit one of these locations
SeaTac
Tukwila
Marysville
Bothell
Leavenworth
Tacoma
Olympia
Lynnwood

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Fly from Toronto to Seattle on these airlines

Choose from the following airlines for your flight from Toronto to Seattle. Flights are based on user searches made on Cheapflights and were last updated on 15 April 2025.
Air Canada flights from Toronto to Seattle/Tacoma Intl
WestJet flights from Toronto to Seattle/Tacoma Intl
United Airlines flights from Toronto to Seattle/Tacoma Intl

Top 7 airlines flying from Toronto to Seattle

Discover the top 7 airlines that operate flights from Toronto 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 15 April 2025.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 192AverageC$ 453FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Alaska AirlinesCheapestC$ 332AverageC$ 517FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
Air CanadaCheapestC$ 366AverageC$ 515FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 367AverageC$ 681FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
DeltaCheapestC$ 407AverageC$ 569FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Hawaiian AirlinesCheapestC$ 413AverageC$ 413FlexibilityNo cancel feeOn-time85%
Search Hawaiian Airlines flights
American AirlinesCheapestC$ 431AverageC$ 555FlexibilityNo cancel feeOn-time71%
Search American 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 Toronto to Seattle?

Deals for Toronto to Seattle flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

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

Millions of users choose and trust Cheapflights to book the best flight deals from Toronto to Seattle for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

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

Users can book flights with no change fees policies with our dedicated filters. Book flights from Toronto to Seattle flexibly with Cheapflights today.

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

Yes, Cheapflights offers price alerts on Toronto 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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