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$149+ 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 10/8. Fares are subject to change and may not be available on all flights or dates of travel.
YTO — SEA
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
1 adult, Economy
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Cheapflights Tip: The best prices from Toronto to Seattle/Tacoma Intl are usually found in February or January, booked 75 days in advance, depart on a Thursday or Wednesday and return on a Tuesday

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 July 31, 2025.

Round-trip from

$227
(Air Canada)

One-way from

$149
(Alaska Airlines)

Popular in

December

Cheapest in

February

Average price

$402

Good round-trip deal

$349 or less

Good one-way deal

$209 or less
From Toronto (YTO) to Seattle/Tacoma Intl
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One-way flight from Toronto (YTO) to Seattle/Tacoma Intl
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High demand for flights, 4% potential price rise
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Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Price to beat on a round-trip flight from Toronto (YTO) to Seattle/Tacoma Intl.
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Price to beat on a one-way flight from Toronto (YTO) to Seattle/Tacoma Intl.
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Find flight deals from Toronto to Seattle

Cheapest flights from Toronto to Seattle
Explore the most affordable flight options available from Toronto to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 31, 2025.

This Air Canada deal was found by Cheapflights users on 7/29. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/52:00 pmYYZ - SEA
1 stop7h 36mAir Canada
Sun 9/147:15 pmSEA - YYZ
1 stop8h 45mAir Canada
Deal found 7/29$227
This FlightHub deal was found by Cheapflights users on 7/30. 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 9/171:30 pmYYZ - SEA
1 stop9h 59mWestJet
Tue 9/232:05 pmSEA - YYZ
1 stop7h 17mWestJet
Deal found 7/30$228
This Air Canada deal was found by Cheapflights users on 7/29. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/194:10 pmYTZ - SEA
2 stops9h 06mAir Canada
Tue 9/97:15 amSEA - YTZ
1 stop9h 34mAir Canada
Deal found 7/29$237
This Alaska Airlines deal was found by Cheapflights users on 7/30. 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.
Wed 10/14:45 pmYYZ - SEA
Nonstop5h 23mAlaska Airlines
Wed 10/87:18 amSEA - YYZ
Nonstop4h 42mAlaska Airlines
Deal found 7/30$244
This FlightHub deal was found by Cheapflights users on 7/29. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/226:00 amYKF - SEA
1 stop9h 58mWestJet
Thu 8/281:50 pmSEA - YKF
1 stop7h 56mWestJet
Deal found 7/29$265
This Trip.com deal was found by Cheapflights users on 7/29. 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.
Tue 8/196:00 amYHM - SEA
1 stop9h 58mWestJet
Wed 8/271:50 pmSEA - YHM
1 stop7h 51mWestJet
Deal found 7/29$271
This Delta deal was found by Cheapflights users on 7/30. 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.
Sat 10/45:43 pmYYZ - SEA
1 stop7h 15mDelta
Tue 10/75:25 amSEA - YYZ
1 stop8h 15mDelta
Deal found 7/30$273
This Mytrip deal was found by Cheapflights users on 7/30. 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.
Sun 9/216:15 amYKF - SEA
2 stops15h 21mMultiple Airlines
Tue 9/305:30 amSEA - YKF
3 stops21h 00mMultiple Airlines
Deal found 7/30$303
This Mytrip deal was found by Cheapflights users on 7/30. 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.
Sun 9/72:55 pmYHM - SEA
2 stops25h 04mMultiple Airlines
Fri 9/121:15 pmSEA - YHM
1 stop7h 33mMultiple Airlines
Deal found 7/30$391

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 31, 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

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Fri 9/5

2:00 pm-6:36 pm

1 stop7h 36m

Seattle/Tacoma Intl

Sun 9/14

7:15 pm-7:00 am

1 stop8h 45m

$227

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 9/17

1:30 pm-8:29 pm

1 stop9h 59m

Seattle/Tacoma Intl

Tue 9/23

2:05 pm-12:22 am

1 stop7h 17m

$228

TorontoSeattle

YTZ - SEA

YTZSEA

Toronto Island

Tue 8/19

4:10 pm-10:16 pm

2 stops9h 06m

Seattle/Tacoma Intl

Tue 9/9

5:30 am-8:41 pm

2 stops12h 11m

$237

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 10/1

4:45 pm-7:08 pm

Nonstop5h 23m

Seattle/Tacoma Intl

Wed 10/8

7:18 am-3:00 pm

Nonstop4h 42m

$244

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Fri 8/22

6:00 am-12:58 pm

1 stop9h 58m

Seattle/Tacoma Intl

Thu 8/28

1:50 pm-12:46 am

1 stop7h 56m

$265

HamiltonSeattle

YHM - SEA

YHMSEA

Hamilton

Tue 8/19

6:00 am-12:58 pm

1 stop9h 58m

Seattle/Tacoma Intl

Wed 8/27

1:50 pm-12:41 am

1 stop7h 51m

$271

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sat 10/4

5:43 pm-9:58 pm

1 stop7h 15m

Seattle/Tacoma Intl

Tue 10/7

5:25 am-4:40 pm

1 stop8h 15m

$273

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Sun 9/21

6:15 am-6:36 pm

2 stops15h 21m

Seattle/Tacoma Intl

Tue 9/30

5:30 am-5:30 am

3 stops21h 00m

$303

HamiltonSeattle

YHM - SEA

YHMSEA

Hamilton

Sun 9/7

2:55 pm-12:59 pm

2 stops25h 04m

Seattle/Tacoma Intl

Fri 9/12

1:15 pm-11:48 pm

1 stop7h 33m

$391

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 10/8

4:45 pm-7:08 pm

Nonstop5h 23m

$149

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

Showing 1-10 of 22 results
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Best time to book a flight from Toronto to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Toronto with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Toronto to Seattle

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

Use this chart to determine the optimal time to book a round-trip flight from Toronto to Seattle. Price data was last updated on July 25, 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 75 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 June is currently the most expensive (average of $389). 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 31, 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 47% on your trip compared to booking a flight at noon.

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 Saturday evenings when fares are most often at their lowest. Tuesday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Toronto to Seattle

Explore weekly flight availability from Toronto to Seattle. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated July 31, 2025.

The most flights from YTO to SEA are scheduled on a Wednesday (6 on average). You will have fewer flight options on Monday, 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?

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 31, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Delta, and United 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
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Entertainment

7.1

Comfort

7.8

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

YEG - SEA

Alaska airline excellent airline pilot smooth, landing, crew staff very nice friendly behave
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Entertainment

7.1

Comfort

7.8

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

YEG - SEA

Alaska airline excellent airline pilot smooth, landing, crew staff very nice friendly behave
Delta
8.0
Very good
7,980 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Entertainment

7.1

Comfort

7.8

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

YEG - SEA

Alaska airline excellent airline pilot smooth, landing, crew staff very nice friendly behave
United Airlines
7.4
Good
8,902 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Entertainment

7.1

Comfort

7.8

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

YEG - SEA

Alaska airline excellent airline pilot smooth, landing, crew staff very nice friendly behave
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Entertainment

7.1

Comfort

7.8

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

YEG - SEA

Alaska airline excellent airline pilot smooth, landing, crew staff very nice friendly behave
WestJet
7.2
Good
2,977 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Entertainment

7.1

Comfort

7.8

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

YEG - SEA

Alaska airline excellent airline pilot smooth, landing, crew staff very nice friendly behave

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 4 inbound flights from Toronto per day.

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

    Flying on Air Canada is currently your cheapest option to Seattle, with prices starting at $227. Additional round-trip tickets that might be worth considering are offered by WestJet and Alaska Airlines, with the lowest prices starting at $228 and $244, respectively. Users have found that Air Canada is 36% 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 Alaska Airlines, which is currently one of the cheapest options available, starting at $149. WestJet flights start at $152 while deals on Air Canada start at $152 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 Air Tahiti Nui (94%), Alaska Airlines (93%) and Hawaiian Airlines (93%).

  • What are the cheapest flights from Toronto to Seattle?

    On average you can expect to pay $1,247 for a flight from Toronto to Seattle. The cheapest flight overall is $140 while the most popular route, (Toronto Pearson Intl - Seattle/Tacoma Intl) is currently priced at $230.

  • 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 June is currently the most expensive (average of $389). 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
Tukwila
Tacoma
Ocean Shores
Lakewood
Lynnwood
Lacey
Leavenworth
Renton
Olympia
Puyallup
Kent
Cle Elum
Chehalis
Kirkland
Issaquah
Aberdeen
Shoreline
Federal Way
Shelton

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 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapest$213Average$302FlexibilityNo cancel feeOn-time60%
United AirlinesCheapest$240Average$448FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$243Average$402FlexibilityNo cancel feeOn-time75%
Air CanadaCheapest$250Average$462FlexibilityNo cancel feeOn-time67%
American AirlinesCheapest$277Average$277FlexibilityNo cancel feeOn-time71%
DeltaCheapest$289Average$353FlexibilityNo cancel feeOn-timeN/A

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