Seattle

$139+ Cheap flights from Toronto (YTO) to Seattle (SEA)

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 5/4. Fares are subject to change and may not be available on all flights or dates of travel.
YTO — SEA
Apr 2 — Apr 91
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1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”
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Cheapflights Tip: The best prices from Toronto to Seattle/Tacoma Intl are usually found in February or January, booked 52 days in advance, depart on a Wednesday or Monday 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 March 28, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$236
(Trip.com)

One-way from

$139
(Trip.com)

Popular in

May

Cheapest in

February

Average price

$357

Good round-trip deal

$318 or less

Good one-way deal

$237 or less
Provider with most accurate pricing for Toronto (YTO)-Seattle/Tacoma Intl flight deals.
Provider most trusted by Cheapflights users for Toronto (YTO)-Seattle/Tacoma Intl flights.
From Toronto (YTO) to Seattle/Tacoma Intl
One-way flight from Toronto (YTO) to Seattle/Tacoma Intl
Highest demand for flights based on searches. 13% potential increase in price ($59 potential increase over avg. RT price).
Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).
Average for round-trip flights in March 2025
Price to beat on a round-trip flight from Toronto (YTO) to Seattle/Tacoma Intl.
Price to beat on a one-way flight from Toronto (YTO) to Seattle/Tacoma Intl.

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 March 28, 2025.

This Trip.com deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/46:00 amYHM - SEA
1 stop9h 58mWestJet
Wed 5/71:50 pmSEA - YHM
1 stop7h 51mWestJet
Deal found 3/27$238
This FlightHub deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/306:00 amYKF - SEA
1 stop9h 58mWestJet
Wed 5/71:50 pmSEA - YKF
1 stop7h 56mWestJet
Deal found 3/27$242
This Trip.com deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/308:00 amYYZ - SEA
1 stop7h 58mWestJet
Sun 6/87:05 amSEA - YYZ
1 stop7h 17mWestJet
Deal found 3/26$242
This Kiwi.com deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/302:00 pmYYZ - SEA
2 stops32h 51mMultiple Airlines
Wed 5/76:00 amSEA - YYZ
1 stop10h 59mMultiple Airlines
Deal found 3/27$248
This Trip.com deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/296:00 amYHM - SEA
1 stop9h 58mMultiple Airlines
Wed 4/3012:30 pmSEA - YHM
2 stops33h 11mMultiple Airlines
Deal found 3/27$281
This Flightnetwork deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/1212:25 pmYTZ - SEA
1 stop10h 12mAir Canada
Mon 5/197:15 pmSEA - YTZ
2 stops13h 32mAir Canada
Deal found 3/27$287
This Mytrip deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/56:00 amYKF - SEA
1 stop9h 58mMultiple Airlines
Wed 6/116:00 amSEA - YKF
2 stops15h 46mMultiple Airlines
Deal found 3/27$292
This Flightnetwork deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/1212:00 pmYYZ - SEA
1 stop10h 37mAir Canada
Mon 5/197:15 pmSEA - YYZ
2 stops13h 24mAir Canada
Deal found 3/27$293
This Alaska Airlines deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/14:45 pmYYZ - SEA
Nonstop5h 14mAlaska Airlines
Sun 5/47:15 amSEA - YYZ
Nonstop4h 45mAlaska Airlines
Deal found 3/27$300
This Mytrip deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/77:00 amYTZ - SEA
2 stops20h 10mMultiple Airlines
Wed 5/146:00 amSEA - YTZ
3 stops31h 27mMultiple Airlines
Deal found 3/27$301
This CheapTicketsDeal deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapTicketsDeal is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/224:45 pmYYZ - SEA
Nonstop5h 14mHawaiian Airlines
Sat 4/267:15 amSEA - YYZ
Nonstop4h 45mHawaiian Airlines
Deal found 3/26$308
This United Airlines deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/294:18 pmYYZ - SEA
1 stop7h 44mUnited Airlines
Wed 4/306:00 amSEA - YYZ
Nonstop4h 57mUnited Airlines
Deal found 3/27$310

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 2,558,603 searches. Data last updated March 28, 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

Sun 5/4

6:00 am-12:58 pm

1 stop9h 58m

Seattle/Tacoma Intl

Wed 5/7

1:50 pm-12:41 am

1 stop7h 51m

$238

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Wed 4/30

6:00 am-12:58 pm

1 stop9h 58m

Seattle/Tacoma Intl

Wed 5/7

1:50 pm-12:46 am

1 stop7h 56m

$242

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Fri 5/30

8:00 am-12:58 pm

1 stop7h 58m

Seattle/Tacoma Intl

Sun 6/8

7:05 am-5:22 pm

1 stop7h 17m

$242

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 4/30

2:00 pm-7:51 pm

2 stops32h 51m

Seattle/Tacoma Intl

Wed 5/7

6:00 am-7:59 pm

1 stop10h 59m

$248

HamiltonSeattle

YHM - SEA

YHMSEA

Hamilton

Tue 4/29

6:00 am-12:58 pm

1 stop9h 58m

Seattle/Tacoma Intl

Wed 4/30

12:30 pm-12:41 am

2 stops33h 11m

$281

TorontoSeattle

YTZ - SEA

YTZSEA

Toronto Island

Mon 5/12

12:25 pm-7:37 pm

1 stop10h 12m

Seattle/Tacoma Intl

Mon 5/19

7:15 pm-11:47 am

2 stops13h 32m

$287

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Thu 6/5

6:00 am-12:58 pm

1 stop9h 58m

Seattle/Tacoma Intl

Wed 6/11

6:00 am-12:46 am

2 stops15h 46m

$292

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Mon 5/12

12:00 pm-7:37 pm

1 stop10h 37m

Seattle/Tacoma Intl

Mon 5/19

7:15 pm-11:39 am

2 stops13h 24m

$293

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Thu 5/1

4:45 pm-6:59 pm

Nonstop5h 14m

Seattle/Tacoma Intl

Sun 5/4

7:15 am-3:00 pm

Nonstop4h 45m

$300

TorontoSeattle

YTZ - SEA

YTZSEA

Toronto Island

Wed 5/7

7:00 am-12:10 am

2 stops20h 10m

Seattle/Tacoma Intl

Wed 5/14

6:00 am-4:27 pm

3 stops31h 27m

$301

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/27

Showing 1-10 of 28 results
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Compare providers for flights from Toronto to Seattle

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Toronto to Seattle in March.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
ExpediaPrice Accuracy1 starTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Toronto-Seattle flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Toronto-Seattle flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Toronto-Seattle flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Toronto-Seattle flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Toronto-Seattle flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

The best insider tips for Toronto to Seattle flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your Toronto to Seattle trip
Airports
YYZ

Toronto Pearson offers fast and reliable Wi-Fi throughout the airport, perfect for staying connected before your flight.

Read more about YYZby Kaitlyn McInnis
SEA

Use the Link light rail from SEA to downtown Seattle for an affordable and convenient 40-minute journey.

Read more about SEAby Brandon Schultz
Our travel experts
Kaitlyn McInnis

Kaitlyn McInnis

Expert on YYZ

Kaitlyn McInnis

Kaitlyn McInnis

Kaitlyn is a guidebook author and travel writer splitting her time between Atlantic Canada and Istanbul, Türkiye. She has visited over fifty countries and all seven continents, so she is very familiar with many hotels, airports and airlines around the globe. But her favorite type of vacation is sunbathing by the sea with a good book in hand.

Read more
Brandon Schultz

Brandon Schultz

Expert on SEA

Brandon Schultz

Brandon Schultz

Brandon Schultz is an award-winning food and travel writer based in New York City. His work has appeared in Forbes, AAA, Thrillist, Travel + Leisure, and The Daily Meal, among many others, and he is the author of 6 books, including 3 cookbooks.

Read more

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 March 21, 2025.

The price you pay for your flight from Toronto to Seattle may vary depending on when you book. For the best chance of a lower fare, look to book 52 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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 $238). Flying from Toronto to Seattle in July is currently the most expensive (average of $411). 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 March 28, 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 31% 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 December 16, 2024.

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

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 0.7 - 6.6 inches per month. November is typically the wettest month, when rainfall can reach 6.6 in. July is typically the driest time to visit Seattle when rainfall is around 0.7 in.

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 66.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 41.0 F).

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 March 28, 2025.
Read reviews from past customers who have flown Alaska Airlines, Delta and Hawaiian Airlines from Toronto to Seattle. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Overall

8.0

Boarding

8.2

Entertainment

7.1

Comfort

7.9

Crew

8.5

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

Overall

8.0

Boarding

8.2

Entertainment

7.1

Comfort

7.9

Crew

8.5

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
8.0
Very good

Overall

8.0

Boarding

8.2

Entertainment

7.1

Comfort

7.9

Crew

8.5

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

Overall

8.0

Boarding

8.2

Entertainment

7.1

Comfort

7.9

Crew

8.5

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

Overall

8.0

Boarding

8.2

Entertainment

7.1

Comfort

7.9

Crew

8.5

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

Overall

8.0

Boarding

8.2

Entertainment

7.1

Comfort

7.9

Crew

8.5

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?

    Seattle/Tacoma Intl (SEA), located 11.4 mi from the city center, is the airport you fly into when you book flights from Toronto to Seattle. 6 airlines have flights to Seattle/Tacoma Intl from Toronto on a regular basis. Booking flights from Toronto to Seattle/Tacoma Intl should not be difficult; the airport handles an average of 2 inbound flights from Toronto per day.

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

    Flying on WestJet is currently your cheapest option to Seattle, with prices starting at $236. Additional round-trip tickets that might be worth considering are offered by Air Canada and Alaska Airlines, with the lowest prices starting at $287 and $300, respectively. Users have found that WestJet is 39% cheaper than the other options available to this destination.

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

    To fly one-way, consider booking your trip with WestJet, which is currently one of the cheapest options available, starting at $139. Air Canada flights start at $167 while deals on Alaska Airlines start at $175 one-way.

  • What are the most popular routes 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 (100%), Qatar Airways (85%) and Alaska Airlines (85%).

  • What are the cheapest flights from Toronto to Seattle?

    On average you can expect to pay $350 for a flight from Toronto to Seattle. The cheapest flight overall is $154 while the most popular route, (Toronto Pearson Intl - Seattle/Tacoma Intl) is currently priced at $271.

  • 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 $238). Flying from Toronto to Seattle in July is currently the most expensive (average of $411). 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

Traveling to a place near Toronto?

Book flights to Toronto if you plan to visit one of these locations
SeaTac
Tukwila
Tacoma
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Renton
Lacey
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Leavenworth
Federal Way
Olympia
Cle Elum
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Mukilteo
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Lynnwood
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Silverdale
Redmond
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Top 6 airlines flying from Toronto to Seattle

Discover the top 6 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 2,558,603 searches. Data last updated March 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$122Average$464FlexibilityNo cancel feeOn-time67%
WestJetCheapest$164Average$386FlexibilityNo cancel feeOn-time60%
Alaska AirlinesCheapest$239Average$414FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$240Average$400FlexibilityNo cancel feeOn-time69%
DeltaCheapest$292Average$451FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$393Average$653FlexibilityNo cancel feeOn-time71%
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