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$188+ 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 8/16. Fares are subject to change and may not be available on all flights or dates of travel.
YTO — SEA
Aug 13 — Aug 201
Thu 8/13
Thu 8/20
1 adult, Economy
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1. Tell us where you want to go

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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 21 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 July 14, 2026.

This oojo deal was found by Cheapflights users on 7/13. 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 10/11:30 pm
YYZ
-
SEA
1 stop8h 15m
WestJet
Mon 10/57:35 pm
SEA
-
YYZ
1 stop8h 20m
WestJet
Deal found 7/13$301
This oojo deal was found by Cheapflights users on 7/9. 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 8/2812:00 pm
YYZ
-
SEA
2 stops9h 45m
WestJet
Sat 10/313:20 pm
SEA
-
YYZ
2 stops11h 38m
WestJet
Deal found 7/9$302
This Justfly.com deal was found by Cheapflights users on 7/10. 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.
Sun 10/111:30 pm
YYZ
-
SEA
1 stop8h 15m
WestJet
Sat 10/177:35 pm
SEA
-
YYZ
1 stop8h 20m
WestJet
Deal found 7/10$304
This FlightHub deal was found by Cheapflights users on 7/12. 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 10/21:30 pm
YYZ
-
SEA
1 stop8h 15m
WestJet
Mon 10/57:35 pm
SEA
-
YYZ
1 stop7h 10m
WestJet
Deal found 7/12$305
This oojo deal was found by Cheapflights users on 7/9. 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.
Sat 8/291:30 pm
YYZ
-
SEA
1 stop8h 15m
WestJet
Wed 10/710:30 am
SEA
-
YYZ
1 stop7h 45m
WestJet
Deal found 7/9$306
This oojo deal was found by Cheapflights users on 7/9. 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.
Sat 10/241:30 pm
YYZ
-
SEA
1 stop8h 15m
WestJet
Sun 11/13:10 pm
SEA
-
YYZ
2 stops28h 33m
WestJet
Deal found 7/9$307
This Kissandfly.com deal was found by Cheapflights users on 7/9. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/2610:15 pm
YYZ
-
SEA
2 stops19h 05m
WestJet
Fri 10/303:10 pm
SEA
-
YYZ
2 stops11h 48m
WestJet
Deal found 7/9$309
This oojo deal was found by Cheapflights users on 7/9. 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.
Sat 10/318:00 am
YYZ
-
SEA
2 stops33h 20m
WestJet
Tue 11/33:10 pm
SEA
-
YYZ
2 stops28h 33m
WestJet
Deal found 7/9$310
This oojo deal was found by Cheapflights users on 7/9. 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 9/2512:40 pm
YYZ
-
SEA
2 stops9h 05m
WestJet
Sat 10/37:35 pm
SEA
-
YYZ
1 stop8h 20m
WestJet
Deal found 7/9$312
This Kiwi.com deal was found by Cheapflights users on 7/11. 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.
Sat 9/51:30 pm
YYZ
-
SEA
1 stop8h 15m
WestJet
Mon 9/147:35 pm
SEA
-
YYZ
1 stop7h 10m
WestJet
Deal found 7/11$314
This Kiwi.com deal was found by Cheapflights users on 7/11. 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.
Sat 9/51:30 pm
YYZ
-
SEA
1 stop8h 15m
WestJet
Sun 9/137:35 pm
SEA
-
YYZ
1 stop7h 10m
WestJet
Deal found 7/11$316
This oojo deal was found by Cheapflights users on 7/9. 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 8/206:10 pm
YHM
-
SEA
1 stop18h 30m
WestJet
Tue 8/257:00 am
SEA
-
YHM
1 stop7h 15m
WestJet
Deal found 7/9$344

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 July 14, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$301
(oojo)

One-way from

$188
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$361

Good round-trip deal

$901 or less

Good one-way deal

$265 or less
Provider with most accurate pricing for Toronto (YTO)-Seattle/Tacoma Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Toronto (YTO)-Seattle/Tacoma Intl flights.
Search Deals
From Toronto (YTO) to Seattle/Tacoma Intl
Search Deals
One-way flight from Toronto (YTO) to Seattle/Tacoma Intl
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($50 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals
Price to beat on a round-trip flight from Toronto (YTO) to Seattle/Tacoma Intl.
Search Deals
Price to beat on a one-way flight from Toronto (YTO) to Seattle/Tacoma Intl.
Search Deals

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 July 14, 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

Fri 8/14

6:15 pm-9:40 am

1 stop18h 25m

Seattle/Tacoma Intl

Sun 8/23

7:00 am-5:15 pm

1 stop7h 15m

$357

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Thu 8/6

8:40 pm-6:45 pm

1 stop25h 05m

Seattle/Tacoma Intl

Tue 8/11

7:00 am-7:50 pm

1 stop9h 50m

$366

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Thu 8/6

8:40 pm-6:45 pm

1 stop25h 05m

Seattle/Tacoma Intl

Thu 8/13

7:35 pm-7:50 pm

1 stop21h 15m

$369

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Thu 8/13

8:40 pm-9:40 am

1 stop16h 00m

Seattle/Tacoma Intl

Thu 8/20

7:35 pm-7:50 pm

1 stop21h 15m

$369

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Fri 11/27

4:10 pm-11:02 pm

1 stop9h 52m

Seattle/Tacoma Intl

Sat 12/5

7:45 am-3:25 pm

Nonstop4h 40m

$384

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Fri 8/14

8:40 pm-9:40 am

1 stop16h 00m

Seattle/Tacoma Intl

Thu 8/20

7:35 pm-7:50 pm

1 stop21h 15m

$391

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sun 9/6

9:44 am-8:45 pm

1 stop14h 01m

Seattle/Tacoma Intl

Tue 9/15

8:00 am-3:41 pm

Nonstop4h 41m

$392

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Fri 8/7

8:40 pm-9:40 am

1 stop16h 00m

Seattle/Tacoma Intl

Sat 8/15

7:00 am-7:50 pm

1 stop9h 50m

$392

HamiltonSeattle

YHM - SEA

YHMSEA

Hamilton

Sat 8/15

6:15 pm-9:40 am

1 stop18h 25m

Seattle/Tacoma Intl

Tue 8/18

10:30 am-5:15 pm

1 stop27h 45m

$407

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Wed 9/16

8:40 pm-6:45 pm

1 stop25h 05m

Seattle/Tacoma Intl

Sat 9/19

7:35 pm-7:50 pm

1 stop21h 15m

$419

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/13

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 July.
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

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 $87). Flying from Toronto to Seattle in August is currently the most expensive (average of $520). 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 July 14, 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 July 14, 2026.

The most flights from YTO to SEA are scheduled on a Monday (4 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (2 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 80% 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 $341.

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 27% 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?

Wednesday 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 17% of flights being delayed.

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.

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 July 14, 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.
Alaska Airlines
7.9
Good
12,653 reviews

Entertainment

7.0

Overall

7.9

Food

7.0

Crew

8.5

Boarding

8.1

Comfort

7.8

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.
Alaska Airlines
7.9
Good
12,653 reviews
Alaska Airlines
7.9
Good
12,653 reviews

Entertainment

7.0

Overall

7.9

Food

7.0

Crew

8.5

Boarding

8.1

Comfort

7.8

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.
Delta
7.8
Good
8,468 reviews
Alaska Airlines
7.9
Good
12,653 reviews

Entertainment

7.0

Overall

7.9

Food

7.0

Crew

8.5

Boarding

8.1

Comfort

7.8

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.
United Airlines
7.4
Good
9,991 reviews
Alaska Airlines
7.9
Good
12,653 reviews

Entertainment

7.0

Overall

7.9

Food

7.0

Crew

8.5

Boarding

8.1

Comfort

7.8

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.
WestJet
7.2
Good
3,410 reviews
Alaska Airlines
7.9
Good
12,653 reviews

Entertainment

7.0

Overall

7.9

Food

7.0

Crew

8.5

Boarding

8.1

Comfort

7.8

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.
Air Canada
7.1
Good
11,336 reviews
Alaska Airlines
7.9
Good
12,653 reviews

Entertainment

7.0

Overall

7.9

Food

7.0

Crew

8.5

Boarding

8.1

Comfort

7.8

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

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, Air Canada, and United Airlines fly from Toronto to Seattle in about 10h 07m. The time it takes to get you to your destination can typically vary by up to 5h 53m. 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 $193. 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 45% 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 $129 while deals on WestJet start at $131 one-way.

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

    Most travelers choose Toronto Pearson Intl - Seattle/Tacoma Intl, Hamilton - Seattle/Tacoma Intl or Toronto Island - Seattle/Tacoma Intl when deciding on the best 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 Alaska Airlines (93%), Qatar Airways (67%) and Air Canada (55%).

  • What are the cheapest flights from Toronto to Seattle?

    On average you can expect to pay $743 for a flight from Toronto to Seattle. The cheapest flight overall is $206 while the most popular route, (Toronto Pearson Intl - Seattle/Tacoma Intl) is currently priced at $318.

  • 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 $87). Flying from Toronto to Seattle in August is currently the most expensive (average of $520). 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
Lacey
Leavenworth
Olympia
Ocean Shores
Edmonds
Snoqualmie
Tumwater
Tukwila
Renton
Kent
Lynnwood
Puyallup
Ellensburg
Fife
Marysville
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 July 14, 2026.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapest$193Average$333FlexibilityNo cancel feeOn-time60%
Alaska AirlinesCheapest$202Average$402FlexibilityNo cancel feeOn-time75%
Air CanadaCheapest$213Average$408FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$238Average$557FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$277Average$277FlexibilityNo cancel feeOn-time71%
DeltaCheapest$278Average$391FlexibilityNo cancel feeOn-timeN/A

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