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$55+ Cheap flights from Seattle (SEA) to Toronto (YTO)

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 6/16. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YTO
may. 5 — may. 121
lun. 5/5
lun. 5/12
1 adult, Economy
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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Toronto are usually found in January or February, booked 75 days in advance, depart on a Thursday or Monday and return on a Wednesday

Cheap flight deals from Seattle to Toronto

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Toronto (YTO). 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 abril 30, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$237
(Trip.com)

One-way from

$55
(Vakatrip)

Popular in

June

Cheapest in

January

Average price

$493

Good round-trip deal

$394 or less

Good one-way deal

$209 or less
Provider with most accurate pricing for Seattle/Tacoma Intl-Toronto (YTO) flight deals.
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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Toronto (YTO) flights.
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From Seattle/Tacoma Intl to Toronto (YTO)
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One-way flight from Seattle/Tacoma Intl to Toronto (YTO)
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($63 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($7 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 Seattle/Tacoma Intl to Toronto (YTO).
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Price to beat on a one-way flight from Seattle/Tacoma Intl to Toronto (YTO).
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Find flight deals from Seattle to Toronto

Cheapest flights from Seattle to Toronto
Explore the most affordable flight options available from Seattle to Toronto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on abril 30, 2025.

This Trip.com deal was found by Cheapflights users on 4/29. 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.
jue. 5/291:50 pmSEA - YHM
1 stop7h 51mWestJet
mié. 6/46:00 amYHM - SEA
1 stop9h 58mWestJet
Deal found 4/29$237
This Trip.com deal was found by Cheapflights users on 4/29. 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.
mié. 7/161:50 pmSEA - YKF
1 stop7h 56mWestJet
dom. 7/206:00 amYKF - SEA
1 stop17h 28mWestJet
Deal found 4/29$258
This Flightnetwork deal was found by Cheapflights users on 4/29. 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.
mar. 6/35:30 amSEA - YTZ
2 stops10h 07mAir Canada
mar. 6/2410:20 amYTZ - SEA
2 stops13h 21mAir Canada
Deal found 4/29$280
This Mytrip deal was found by Cheapflights users on 4/29. 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.
mar. 6/33:20 pmSEA - YYZ
3 stops30h 13mMultiple Airlines
mar. 6/242:00 pmYYZ - SEA
1 stop9h 41mMultiple Airlines
Deal found 4/29$296
This Kiwi.com deal was found by Cheapflights users on 4/28. 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.
mié. 6/117:05 amSEA - YKF
2 stops19h 25mMultiple Airlines
mié. 6/186:00 amYKF - SEA
1 stop9h 58mMultiple Airlines
Deal found 4/28$301
This Flightnetwork deal was found by Cheapflights users on 4/29. 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.
mié. 6/42:55 pmSEA - YYZ
1 stop7h 14mAir Canada
mar. 6/108:30 amYYZ - SEA
Nonstop5h 21mAir Canada
Deal found 4/29$303
This Alaska Airlines deal was found by Cheapflights users on 4/28. 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.
mié. 5/287:23 amSEA - YYZ
Nonstop4h 37mAlaska Airlines
mar. 6/34:45 pmYYZ - SEA
Nonstop5h 19mAlaska Airlines
Deal found 4/28$307
This Delta deal was found by Cheapflights users on 4/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 6/176:00 amSEA - YYZ
1 stop9h 34mDelta
mié. 6/256:30 amYYZ - SEA
1 stop7h 15mDelta
Deal found 4/29$321
This Mytrip deal was found by Cheapflights users on 4/29. 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.
mié. 6/41:50 pmSEA - YHM
1 stop7h 51mMultiple Airlines
mar. 6/106:00 amYHM - SEA
2 stops15h 33mMultiple Airlines
Deal found 4/29$346
This Kiwi.com deal was found by Cheapflights users on 4/29. 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.
vie. 6/131:15 pmSEA - YYZ
1 stop8h 18mWestJet
mar. 7/19:00 amYYZ - SEA
2 stops12h 38mWestJet
Deal found 4/29$356
This United Airlines deal was found by Cheapflights users on 4/29. 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.
sáb. 5/2411:50 pmSEA - YYZ
1 stop7h 08mUnited Airlines
dom. 5/2512:45 pmYYZ - SEA
1 stop10h 56mUnited Airlines
Deal found 4/29$373
This American Airlines deal was found by Cheapflights users on 4/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 6/21:10 amSEA - YYZ
1 stop8h 20mAmerican Airlines
mar. 6/241:20 pmYYZ - SEA
1 stop9h 43mAmerican Airlines
Deal found 4/29$382

Cheapflights Fare Finder

Customize your flight search to find flights from Seattle to Toronto 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 abril 30, 2025.
Use the filters below to find and compare flights from Seattle to Toronto that are best for you.

Fly from

Seattle

Fly to

Toronto

Route

Depart

Return

Price

SeattleHamilton

SEA - YHM

SEAYHM

Seattle/Tacoma Intl

jue. 5/29

1:50 pm-12:41 am

1 stop7h 51m

Hamilton

mié. 6/4

6:00 am-12:58 pm

1 stop9h 58m

$237

SeattleToronto

SEA - YKF

SEAYKF

Seattle/Tacoma Intl

mié. 7/16

1:50 pm-12:46 am

1 stop7h 56m

Toronto Region of Waterloo Intl

dom. 7/20

6:00 am-8:28 pm

1 stop17h 28m

$258

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

mar. 6/3

5:30 am-6:37 pm

2 stops10h 07m

Toronto Island

mar. 6/24

10:20 am-8:41 pm

2 stops13h 21m

$280

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

mar. 6/3

3:20 pm-12:33 am

3 stops30h 13m

Toronto Pearson Intl

mar. 6/24

2:00 pm-8:41 pm

1 stop9h 41m

$296

SeattleToronto

SEA - YKF

SEAYKF

Seattle/Tacoma Intl

mié. 6/11

7:05 am-5:30 am

2 stops19h 25m

Toronto Region of Waterloo Intl

mié. 6/18

6:00 am-12:58 pm

1 stop9h 58m

$301

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

mié. 6/4

2:55 pm-1:09 am

1 stop7h 14m

Toronto Pearson Intl

mar. 6/10

8:30 am-10:51 am

Nonstop5h 21m

$303

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

mié. 5/28

7:23 am-3:00 pm

Nonstop4h 37m

Toronto Pearson Intl

mar. 6/3

4:45 pm-7:04 pm

Nonstop5h 19m

$307

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

mar. 6/17

6:00 am-6:34 pm

1 stop9h 34m

Toronto Pearson Intl

mié. 6/25

6:30 am-10:45 am

1 stop7h 15m

$321

SeattleHamilton

SEA - YHM

SEAYHM

Seattle/Tacoma Intl

mié. 6/4

1:50 pm-12:41 am

1 stop7h 51m

Hamilton

mar. 6/10

6:00 am-6:33 pm

2 stops15h 33m

$346

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

vie. 6/13

1:15 pm-12:33 am

1 stop8h 18m

Toronto Pearson Intl

mar. 7/1

9:00 am-6:38 pm

2 stops12h 38m

$356

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

Showing 1-10 of 27 results
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Compare providers for flights from Seattle to Toronto

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 Seattle to Toronto in April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*2 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars
CheapTicketsDealPrice Accuracy3 starsTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star
SmartFaresPrice Accuracy1 starTrust Score*1 star

*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 Seattle-Toronto flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-Toronto flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Seattle-Toronto flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seattle-Toronto flights, Cheapflights users trust eDreams the most. eDreams 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 Seattle-Toronto flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Seattle to Toronto

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

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

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Toronto. Price data was last updated on April 25, 2025.

Booking 69 days in advance of your planned departure date is, on average, the best time to get cheap flights from Seattle to Toronto. 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 Seattle to Toronto?

Currently, January is the cheapest month in which you can book a flight from Seattle to Toronto (average of $243). Flying from Seattle to Toronto in July is currently the most expensive (average of $359). 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 SEA to YTO?

Find hourly flight availability from Seattle to Toronto. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated abril 30, 2025.

A simple way to save on the total cost of your ticket is to fly from Seattle to Toronto in the afternoon. If you’re flexible enough to do this you can expect to save up to 58% on your trip compared to booking a flight in the morning.

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

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

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

Weekly flight availability from Seattle to Toronto

Explore weekly flight availability from Seattle to Toronto. 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 abril 30, 2025.

The most flights from SEA to YTO are scheduled on a Tuesday (6 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (2 on average).

Rainfall in Toronto by month

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

In terms of precipitation, rainfall in Toronto ranges from 2.0 - 3.3 inches per month. June is typically the wettest month, when rainfall can reach 3.3 in. February is typically the driest time to visit Toronto when rainfall is around 2.0 in.

Temperature in Toronto by month

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

If weather is an important factor for your trip to Toronto, 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 69.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 21.2 F).

Reviews of airlines servicing Toronto

Get insights into the airlines that provide service to Toronto. 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 Toronto. Reviews last updated abril 30, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Delta and United Airlines from Seattle to Toronto to help guide your decision. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,968 reviews

Entertainment

7.1

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.1

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥
Alaska Airlines
8.0
Very good
9,968 reviews
Alaska Airlines
8.0
Very good
9,968 reviews

Entertainment

7.1

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.1

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥
Delta
8.0
Very good
7,936 reviews
Alaska Airlines
8.0
Very good
9,968 reviews

Entertainment

7.1

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.1

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥
United Airlines
7.4
Good
8,696 reviews
Alaska Airlines
8.0
Very good
9,968 reviews

Entertainment

7.1

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.1

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
9,968 reviews

Entertainment

7.1

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.1

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥
WestJet
7.2
Good
2,826 reviews
Alaska Airlines
8.0
Very good
9,968 reviews

Entertainment

7.1

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.1

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥

Related info for your journey

Find useful and relevant information for your journey from Seattle to Toronto. 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 from for flights from Seattle to Toronto?

    Seattle/Tacoma Intl (SEA) is the airport you will fly out of if you book a flight from Seattle to Toronto. You should not have trouble finding flights to Toronto from Seattle/Tacoma Intl; the airport handles an average of 3 outbound flights to Toronto per day. You should also have plenty of airline options to choose from since 5 airlines have flights from the Seattle airport to Toronto. It is only a 11.4 mi journey to Seattle/Tacoma Intl (SEA) from Seattle’s city center.

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

    Currently priced at $237, WestJet will fly you from Seattle to Toronto and back. In addition to WestJet, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Air Canada and Alaska Airlines - these airlines can fly you to your destination from $280 and $307, respectively. You may be able to fly from Seattle to Toronto for 44% less than the average price by searching for these airlines.

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

    One-way options have recently been found by users for as low as $55 on WestJet. Other airlines that offer cheap prices include Air Canada from $146 and Delta from $148 one-way.

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

    When deciding which route to take from Seattle to Toronto consider Seattle/Tacoma Intl - Toronto Pearson Intl, Seattle/Tacoma Intl - Hamilton or Seattle/Tacoma Intl - Toronto Region of Waterloo Intl as they are the most popular.

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

    Consider Brussels Airlines (100%), Air Tahiti Nui (95%) or Alaska Airlines (90%) when booking your flight. These represent the most reliable airlines when flying from Seattle to Toronto.

  • What are the cheapest flights from Seattle to Toronto?

    On average you can expect to pay $502 for a flight from Seattle to Toronto. The cheapest flight overall is $159 while the most popular route, (Seattle/Tacoma Intl - Toronto Pearson Intl) is currently priced at $260.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Seattle to Toronto 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 Seattle to Toronto?

    Currently, January is the cheapest month in which you can book a flight from Seattle to Toronto (average of $243). Flying from Seattle to Toronto in July is currently the most expensive (average of $359). 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

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Alternative routes for Seattle to Toronto

See prices for flight routes from nearby airports that may be better suited for you.
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Seattle to Timmins flights
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Top 5 airlines flying from Seattle to Toronto

Discover the top 5 airlines that operate flights from Seattle to Toronto. 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 abril 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$136Average$497FlexibilityNo cancel feeOn-time67%
WestJetCheapest$145Average$433FlexibilityNo cancel feeOn-time60%
United AirlinesCheapest$158Average$394FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$251Average$492FlexibilityNo cancel feeOn-time75%
DeltaCheapest$394Average$513FlexibilityNo cancel feeOn-timeN/A

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