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Cheap flights from Seattle to Toronto from C$ 164

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 2/4. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YTO
4 Mar — 11 Mar1
1 adult

The best prices from Seattle/Tacoma Intl to Toronto are usually found in January or February, booked 70 days in advance, depart on a Thursday or Sunday and return on a Thursday

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 27 February 2025.

Round-trip from

C$ 280

One-way from

C$ 164

Popular in

April

Cheapest in

January

Average price

C$ 475

Good round-trip deal

C$ 816 or less

Good one-way deal

C$ 175 or less
2/4-8/4
  • 2/4-8/4
  • 2 total stops
  • 36h 30m total
  • Seattle to Toronto
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2/4
  • 2/4
  • 1 total stop
  • 17h 55m total
  • Seattle to Toronto
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Highest demand for flights based on searches. 12% potential increase in price (C$ 136 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease (C$ 33 potential savings vs. average RT price).
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Average for round-trip flights in February 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 27 February 2025.

Wed 2/49:48 a.m.SEA - YYZ
1 stop17h 55mMultiple Airlines
Tue 8/48:00 p.m.YYZ - SEA
1 stop18h 35mMultiple Airlines
Deal found 27/2C$ 280
Thu 27/39:48 a.m.SEA - YTZ
2 stops30h 05mMultiple Airlines
Mon 31/34:10 p.m.YTZ - SEA
2 stops19h 33mMultiple Airlines
Deal found 27/2C$ 404
Tue 3/62:05 p.m.SEA - YYZ
1 stop7h 19mWestJet
Tue 17/68:00 a.m.YYZ - SEA
1 stop7h 58mWestJet
Deal found 26/2C$ 437
Fri 4/43:15 p.m.SEA - YKF
1 stop7h 01mWestJet
Mon 14/46:30 a.m.YKF - SEA
1 stop10h 51mWestJet
Deal found 27/2C$ 503
Mon 14/43:15 p.m.SEA - YKF
1 stop12h 25mMultiple Airlines
Mon 21/49:30 p.m.YKF - SEA
2 stops15h 30mMultiple Airlines
Deal found 27/2C$ 515
Fri 3/107:05 a.m.SEA - YHM
1 stop14h 35mWestJet
Mon 6/106:00 a.m.YHM - SEA
1 stop9h 59mWestJet
Deal found 27/2C$ 557
Tue 11/36:05 a.m.SEA - YYZ
Nonstop4h 45mAir Canada
Fri 14/37:05 p.m.YYZ - SEA
Nonstop5h 25mAir Canada
Deal found 25/2C$ 562
Thu 3/75:45 a.m.SEA - YTZ
2 stops9h 51mAir Canada
Mon 7/77:20 p.m.YTZ - SEA
2 stops17h 01mAir Canada
Deal found 26/2C$ 641
Fri 5/98:00 a.m.SEA - YHM
1 stop12h 18mMultiple Airlines
Sun 7/96:00 a.m.YHM - SEA
1 stop9h 59mMultiple Airlines
Deal found 26/2C$ 677

Find flights from Seattle to Toronto within your budget

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 629,999 searches. Data last updated 27 February 2025.

Fly from

Seattle

Fly to

Toronto

Route

Depart

Return

Price

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Wed 2/4

9:48 a.m.-6:43 a.m.

1 stop17h 55m

Toronto Pearson Intl

Tue 8/4

8:00 p.m.-11:35 a.m.

1 stop18h 35m

C$ 280

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Thu 27/3

9:48 a.m.-6:53 p.m.

2 stops30h 05m

Toronto Island

Mon 31/3

10:00 a.m.-8:43 a.m.

3 stops25h 43m

C$ 404

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Tue 3/6

2:05 p.m.-12:24 a.m.

1 stop7h 19m

Toronto Pearson Intl

Tue 17/6

8:00 a.m.-12:58 p.m.

1 stop7h 58m

C$ 437

SeattleToronto

SEA - YKF

SEAYKF

Seattle/Tacoma Intl

Fri 4/4

3:15 p.m.-1:16 a.m.

1 stop7h 01m

Toronto Region of Waterloo Intl

Mon 14/4

6:30 a.m.-2:21 p.m.

1 stop10h 51m

C$ 503

SeattleToronto

SEA - YKF

SEAYKF

Seattle/Tacoma Intl

Mon 14/4

3:15 p.m.-6:40 a.m.

1 stop12h 25m

Toronto Region of Waterloo Intl

Mon 21/4

9:30 p.m.-10:00 a.m.

2 stops15h 30m

C$ 515

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Tue 11/3

6:05 a.m.-1:50 p.m.

Nonstop4h 45m

Toronto Pearson Intl

Fri 14/3

7:05 p.m.-9:30 p.m.

Nonstop5h 25m

C$ 562

SeattleHamilton

SEA - YHM

SEAYHM

Seattle/Tacoma Intl

Fri 16/5

1:50 p.m.-12:41 a.m.

1 stop7h 51m

Hamilton

Sun 25/5

6:00 a.m.-12:58 p.m.

1 stop9h 58m

C$ 568

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Thu 3/7

5:45 a.m.-6:36 p.m.

2 stops9h 51m

Toronto Island

Mon 7/7

7:20 p.m.-9:21 a.m.

2 stops17h 01m

C$ 641

SeattleHamilton

SEA - YHM

SEAYHM

Seattle/Tacoma Intl

Wed 20/8

8:05 a.m.-6:18 p.m.

1 stop7h 13m

Hamilton

Thu 28/8

6:00 a.m.-12:58 p.m.

1 stop9h 58m

C$ 680

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Wed 2/4

9:48 a.m.-6:43 a.m.

1 stop17h 55m

C$ 164

Flights are sorted by cheapest round-trip flights first.

Deals found on 25/2

Showing 1-10 of 23 results
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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.

Travel insights for flights from Seattle to Toronto

Get recent, data-driven insights about flights from Seattle to Toronto including ideal travel times, pricing trends, and more.

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 25 February 2025.

Booking 70 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 C$ 167). Flying from Seattle to Toronto in July is currently the most expensive (average of C$ 258). 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 27 February 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 59% on flights from Seattle to Toronto by exploring options for tickets in the afternoon.

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 27 February 2025.

The most flights from SEA to YTO are scheduled on a Wednesday (5 on average). You will have fewer flight options on Monday, 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 51.0 - 83.0 mm per month. June is typically the wettest month, when rainfall can reach 83.0 mm. February is typically the driest time to visit Toronto when rainfall is around 51.0 mm.

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 21.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -6.0 C).

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 27 February 2025.
See what other customers who have flown with Alaska Airlines, Delta and United Airlines from Seattle to Toronto have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,717 reviews
Check prices

Entertainment

7.1

Boarding

8.2

Food

7.1

Comfort

7.9

Crew

8.5

Overall

8.0

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
9,717 reviews
Alaska Airlines
8.0
Very good
9,717 reviews
Check prices

Entertainment

7.1

Boarding

8.2

Food

7.1

Comfort

7.9

Crew

8.5

Overall

8.0

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
8,140 reviews
Alaska Airlines
8.0
Very good
9,717 reviews
Check prices

Entertainment

7.1

Boarding

8.2

Food

7.1

Comfort

7.9

Crew

8.5

Overall

8.0

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
8,723 reviews
Alaska Airlines
8.0
Very good
9,717 reviews
Check prices

Entertainment

7.1

Boarding

8.2

Food

7.1

Comfort

7.9

Crew

8.5

Overall

8.0

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
9,717 reviews
Check prices

Entertainment

7.1

Boarding

8.2

Food

7.1

Comfort

7.9

Crew

8.5

Overall

8.0

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
2,794 reviews
Alaska Airlines
8.0
Very good
9,717 reviews
Check prices

Entertainment

7.1

Boarding

8.2

Food

7.1

Comfort

7.9

Crew

8.5

Overall

8.0

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), located 18.4 km from the city centre, is the airport you fly out of when you book flights from Seattle to Toronto. 4 airlines have flights from Seattle/Tacoma Intl to Toronto on a regular basis. Booking flights from Seattle/Tacoma Intl to Toronto should not be difficult; the airport handles an average of 3 outbound flights to Toronto per day.

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

    According to our current data, WestJet (C$ 419), Air Canada (C$ 562), and Alaska Airlines (C$ 656) offers the cheapest pricing from Seattle to Toronto. You may be able to fly from Seattle to Toronto for 36% less than the average price by searching for these airlines.

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

    For one-way options, check prices for WestJet. According to our data, you can fly for as low as C$ 203. Users have also found prices from C$ 289 and C$ 296 on Delta and Air Canada, respectively.

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

    Most travellers choose Seattle/Tacoma Intl - Toronto Pearson Intl, Seattle/Tacoma Intl - Toronto Island or Seattle/Tacoma Intl - Toronto Region of Waterloo Intl when deciding on the best route from Seattle to Toronto.

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Seattle to Toronto on time: Qatar Airways (89%), Alaska Airlines (89%), Hawaiian Airlines (89%).

  • What are the cheapest flights from Seattle to Toronto?

    On average you can expect to pay C$ 712 for a flight from Seattle to Toronto. The cheapest flight overall is C$ 141 while the most popular route, (Seattle/Tacoma Intl - Toronto Pearson Intl) is currently priced at C$ 291.

  • 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 C$ 167). Flying from Seattle to Toronto in July is currently the most expensive (average of C$ 258). 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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Top 4 airlines flying from Seattle to Toronto

Discover the top 4 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 629,999 searches. Data last updated 27 February 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 234AverageC$ 847FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
WestJetCheapestC$ 309AverageC$ 434FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Alaska AirlinesCheapestC$ 384AverageC$ 700FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
United AirlinesCheapestC$ 499AverageC$ 835FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Seattle to Toronto?

Deals for Seattle to Toronto flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Seattle to Toronto?

Millions of users choose and trust Cheapflights to book the best flight deals from Seattle to Toronto for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Seattle to Toronto with no change fees?

Need flexible booking options for your flight to Toronto from Seattle? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Seattle to Toronto become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Toronto from Seattle today and book when prices fit your budget.

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