Seattle

$157+ 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 9/4. Fares are subject to change and may not be available on all flights or dates of travel.
YTO — SEA
Jun 6 — Jun 131
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Find cheap flights from Toronto to Seattle with Cheapflights

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”

2. Select your favorite providers

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3. Compare prices and book

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Cheapflights Tip: The best prices from Toronto to Seattle/Tacoma Intl are usually found in February or November, booked 74 days in advance, depart on a Thursday or Friday and return on a Tuesday

Cheap 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 May 7, 2026.

This oojo deal was found by Cheapflights users on 5/3. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/251:30 pm
YYZ
-
SEA
1 stop8h 15m
WestJet
Sat 10/37:35 pm
SEA
-
YYZ
1 stop7h 10m
WestJet
Deal found 5/3$225
This oojo deal was found by Cheapflights users on 5/4. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/1612:00 pm
YYZ
-
SEA
2 stops12h 00m
WestJet
Mon 7/207:00 am
SEA
-
YYZ
2 stops11h 10m
WestJet
Deal found 5/4$229
This oojo deal was found by Cheapflights users on 5/6. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/1012:00 pm
YYZ
-
SEA
2 stops9h 45m
WestJet
Wed 7/2910:30 am
SEA
-
YYZ
2 stops10h 29m
WestJet
Deal found 5/6$230
This oojo deal was found by Cheapflights users on 5/5. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/223:50 pm
YYZ
-
SEA
1 stop8h 10m
WestJet
Mon 7/2710:30 am
SEA
-
YYZ
2 stops10h 29m
WestJet
Deal found 5/5$231
This oojo deal was found by Cheapflights users on 5/6. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/222:50 pm
YYZ
-
SEA
1 stop9h 10m
WestJet
Sun 7/2610:30 am
SEA
-
YYZ
2 stops10h 29m
WestJet
Deal found 5/6$232
This Justfly.com deal was found by Cheapflights users on 5/5. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/222:50 pm
YYZ
-
SEA
1 stop9h 10m
WestJet
Sat 8/17:35 pm
SEA
-
YYZ
1 stop8h 20m
WestJet
Deal found 5/5$233
This Justfly.com deal was found by Cheapflights users on 5/6. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/2712:00 pm
YYZ
-
SEA
1 stop9h 45m
WestJet
Sat 8/110:30 am
SEA
-
YYZ
1 stop9h 15m
WestJet
Deal found 5/6$234
This Justfly.com deal was found by Cheapflights users on 5/6. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2012:00 pm
YYZ
-
SEA
1 stop9h 45m
WestJet
Fri 8/2810:30 am
SEA
-
YYZ
1 stop9h 15m
WestJet
Deal found 5/6$235
This FlightHub deal was found by Cheapflights users on 5/4. 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.
Fri 7/103:50 pm
YYZ
-
SEA
1 stop8h 10m
WestJet
Sun 7/197:00 am
SEA
-
YYZ
2 stops11h 10m
WestJet
Deal found 5/4$237
This Kiwi.com deal was found by Cheapflights users on 5/3. 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.
Thu 7/2312:00 pm
YYZ
-
SEA
1 stop9h 45m
WestJet
Wed 7/297:35 pm
SEA
-
YYZ
1 stop8h 20m
WestJet
Deal found 5/3$239
This oojo deal was found by Cheapflights users on 5/3. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/206:10 pm
YHM
-
SEA
1 stop27h 35m
WestJet
Mon 7/277:00 am
SEA
-
YHM
1 stop7h 15m
WestJet
Deal found 5/3$313
This Justfly.com deal was found by Cheapflights users on 5/3. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/176:10 pm
YHM
-
SEA
1 stop18h 30m
WestJet
Tue 7/287:00 am
SEA
-
YHM
1 stop7h 15m
WestJet
Deal found 5/3$317

Find 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 May 7, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$224
(oojo)

One-way from

$158
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$313

Good round-trip deal

$476 or less

Good one-way deal

$244 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. 7% potential increase in price ($26 potential increase over avg. RT price).
Cheapest flight prices on average. 2% potential price decrease ($7 potential savings vs. average RT price).
Average for round-trip flights in May 2026
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.

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 May 7, 2026.
Use the filters below to find and compare flights from Toronto to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

HamiltonSeattle

YHM - SEA

YHMSEA

Hamilton

Tue 8/11

6:10 pm-9:40 am

1 stop18h 30m

Seattle/Tacoma Intl

Thu 8/13

7:00 am-5:15 pm

1 stop7h 15m

$318

HamiltonSeattle

YHM - SEA

YHMSEA

Hamilton

Wed 7/29

6:10 pm-9:40 am

1 stop18h 30m

Seattle/Tacoma Intl

Tue 8/4

7:00 am-5:15 pm

1 stop7h 15m

$334

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Tue 8/11

8:40 pm-9:40 am

1 stop16h 00m

Seattle/Tacoma Intl

Thu 8/13

7:00 am-7:50 pm

1 stop9h 50m

$335

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Thu 6/4

8:40 pm-9:40 am

1 stop16h 00m

Seattle/Tacoma Intl

Fri 6/12

7:35 pm-7:50 pm

1 stop21h 15m

$335

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Thu 7/23

8:40 pm-9:40 am

1 stop16h 00m

Seattle/Tacoma Intl

Tue 7/28

7:00 am-7:50 pm

1 stop9h 50m

$336

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 5/27

12:09 pm-8:41 pm

1 stop11h 32m

Seattle/Tacoma Intl

Sat 5/30

11:05 pm-8:59 am

1 stop6h 54m

$337

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 5/27

6:30 am-2:30 pm

1 stop11h 00m

Seattle/Tacoma Intl

Sat 5/30

5:00 pm-9:54 am

1 stop13h 54m

$337

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Fri 7/10

8:40 pm-9:00 pm

1 stop27h 20m

Seattle/Tacoma Intl

Mon 7/13

7:35 pm-7:50 pm

1 stop21h 15m

$340

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 5/27

6:30 am-2:30 pm

1 stop11h 00m

Seattle/Tacoma Intl

Fri 5/29

11:00 pm-11:43 am

1 stop9h 43m

$344

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Thu 5/28

12:45 pm-10:08 pm

2 stops12h 23m

Seattle/Tacoma Intl

Wed 6/3

11:20 pm-10:04 am

1 stop7h 44m

$344

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/2

Showing 1-10 of 60 resultsSorted by cheapest first
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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 May.
ProviderPrice AccuracyTrust Score*
FlightHubPrice 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.

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?

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 85 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, December is the cheapest month in which you can book a flight from Toronto to Seattle (average of $91). Flying from Toronto to Seattle in June is currently the most expensive (average of $689). 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 May 7, 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Toronto to Seattle as you normally would.

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 May 7, 2026.

The most flights from YTO to SEA are scheduled on a Monday (4 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (3 on average).

How much does it cost to fly round-trip from Toronto to Seattle?

What’s the top layover airport for flights from Toronto to Seattle?

Share of 1-stop round-trip flights from Toronto to Seattle chosen by Cheapflights users in the past 12 months, using the same layover each way.

Calgary (YYC) – chosen by Cheapflights users on 50% of 1-stop itineraries from Toronto to Seattle on Cheapflights.

What’s the cheapest layover airport for flights from Toronto to Seattle?

Average round-trip fare for 1-stop flights from Toronto to Seattle, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Calgary (YYC) is the most affordable 1-stop option, with an average round-trip price of $368.

What’s the fastest layover option from Toronto to Seattle?

Shortest average travel time for 1-stop one-way flights from Toronto to Seattle, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Vancouver (YVR) have the shortest average one-way travel time for 1-stop routes: 8h 10m.

Which airport typically offers the quickest layover for flights from Toronto to Seattle?

Average layover duration for 1-stop one-way flights from Toronto to Seattle, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Vancouver (YVR) offer the fastest connection on this route, with an average layover time of 1h 39m.

How often are flights from Toronto to Seattle delayed?

About 26% of weekly flights between Toronto and Seattle have experienced delays in the past year, with the average delay time being 155 minutes.

What is the most punctual flight time for Toronto to Seattle flights?

Historically, flights departing in the early afternoon are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Tuesday tends to have the lowest number of delays on this route, whereas Monday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on Toronto to Seattle flights?

Over the last year, Alaska Airlines have had the lowest number of delays on this route, with just 16% of flights being delayed.

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 May 7, 2026.
Peruse reviews from past customers who have flown with Alaska Airlines,Delta, andUnited Airlines from Toronto to Seattle to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Entertainment

7.0

Food

7.1

Boarding

8.1

Overall

7.9

Comfort

7.8

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Eugene,Mar 2026

MFR - SEA

Alaska Airlines is is always good. There where few choices of what to drink, and no food. No blankets, no pillows, and you h ats ok. I just had open heart surgery And i could have used something. But the flight and the crew where exelent. So all is well

Entertainment

7.0

Food

7.1

Boarding

8.1

Overall

7.9

Comfort

7.8

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Eugene,Mar 2026

MFR - SEA

Alaska Airlines is is always good. There where few choices of what to drink, and no food. No blankets, no pillows, and you h ats ok. I just had open heart surgery And i could have used something. But the flight and the crew where exelent. So all is well

Entertainment

7.0

Food

7.1

Boarding

8.1

Overall

7.9

Comfort

7.8

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Eugene,Mar 2026

MFR - SEA

Alaska Airlines is is always good. There where few choices of what to drink, and no food. No blankets, no pillows, and you h ats ok. I just had open heart surgery And i could have used something. But the flight and the crew where exelent. So all is well

Entertainment

7.0

Food

7.1

Boarding

8.1

Overall

7.9

Comfort

7.8

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Eugene,Mar 2026

MFR - SEA

Alaska Airlines is is always good. There where few choices of what to drink, and no food. No blankets, no pillows, and you h ats ok. I just had open heart surgery And i could have used something. But the flight and the crew where exelent. So all is well

Entertainment

7.0

Food

7.1

Boarding

8.1

Overall

7.9

Comfort

7.8

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Eugene,Mar 2026

MFR - SEA

Alaska Airlines is is always good. There where few choices of what to drink, and no food. No blankets, no pillows, and you h ats ok. I just had open heart surgery And i could have used something. But the flight and the crew where exelent. So all is well

Entertainment

7.0

Food

7.1

Boarding

8.1

Overall

7.9

Comfort

7.8

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Eugene,Mar 2026

MFR - SEA

Alaska Airlines is is always good. There where few choices of what to drink, and no food. No blankets, no pillows, and you h ats ok. I just had open heart surgery And i could have used something. But the flight and the crew where exelent. So all is well

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 3 inbound flights from Toronto per day.

  • How long is the flight from Toronto to Seattle?

    Airlines like WestJet and United Airlines fly from Toronto to Seattle in about 9h 44m. The time it takes to get you to your destination can typically vary by up to 2h 16m. Toronto and Seattle are separated by a distance of 2065 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • 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 $192. Additional round-trip tickets that might be worth considering are offered by Alaska Airlines and Air Canada, with the lowest prices starting at $202 and $213, respectively. Users have found that WestJet is 43% 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 Air Canada, which is currently one of the cheapest options available, starting at $121. Alaska Airlines flights start at $128 while deals on WestJet start at $134 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 Alaska Airlines (73%), Hawaiian Airlines (69%) and Qatar Airways (50%).

  • What are the cheapest flights from Toronto to Seattle?

    On average you can expect to pay $424 for a flight from Toronto to Seattle. The cheapest flight overall is $171 while the most popular route, (Toronto Pearson Intl - Seattle/Tacoma Intl) is currently priced at $242.

  • 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, December is the cheapest month in which you can book a flight from Toronto to Seattle (average of $91). Flying from Toronto to Seattle in June is currently the most expensive (average of $689). 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 Seattle?

Book flights to Seattle if you plan to visit one of these locations
SeaTac
Tacoma
Ocean Shores
Olympia
Lynnwood
Lacey
Edmonds
Leavenworth
Snoqualmie
Tumwater
Tukwila
Puyallup
Kent
Renton
Kirkland
Ellensburg
Fife
Lakewood
Issaquah
Shoreline

Browse thousands of different options on Cheapflights for your next trip

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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 May 7, 2026.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapest$192Average$283FlexibilityNo cancel feeOn-time60%
Alaska AirlinesCheapest$202Average$395FlexibilityNo cancel feeOn-time75%
Air CanadaCheapest$213Average$411FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$238Average$446FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$277Average$277FlexibilityNo cancel feeOn-time71%
DeltaCheapest$278Average$379FlexibilityNo cancel feeOn-timeN/A

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