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Cheap flights from Seattle to Toronto from C$ 144

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 26/2. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YTO
2 Feb — 9 Feb1
1 adult

The best prices from Seattle/Tacoma Intl to Toronto are usually found in January or September, booked 70 days in advance, depart on a Sunday or Thursday 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 28 January 2025.

Round-trip from

C$ 357

One-way from

C$ 144

Popular in

April

Cheapest in

January

Average price

C$ 462

Good round-trip deal

C$ 409 or less

Good one-way deal

C$ 174 or less
WestJet
  • WestJet
  • 26/2-2/3
  • 3 total stops
  • 33h 33m total
  • Seattle to Toronto
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26/2
  • 26/2
  • 2 total stops
  • 18h 47m total
  • Seattle to Toronto
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Highest demand for flights based on searches. 17% potential increase in price (C$ 218 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease (C$ 29 potential savings vs. average RT price).
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Average for round-trip flights in January 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 28 January 2025.

Wed 26/28:30 a.m.SEA - YYZ
1 stop19h 13mMultiple Airlines
Sun 2/310:40 p.m.YYZ - SEA
2 stops14h 20mMultiple Airlines
Deal found 27/1C$ 357
Wed 26/27:18 a.m.SEA - YYZ
Nonstop4h 37mAlaska Airlines
Sun 2/34:20 p.m.YYZ - SEA
Nonstop5h 24mAlaska Airlines
Deal found 27/1C$ 383
Tue 22/43:15 p.m.SEA - YYZ
2 stops11h 43mWestJet
Sun 27/49:00 a.m.YYZ - SEA
2 stops14h 28mWestJet
Deal found 28/1C$ 387
Wed 12/33:15 p.m.SEA - YKF
1 stop7h 01mMultiple Airlines
Mon 17/39:30 p.m.YKF - SEA
1 stop19h 51mMultiple Airlines
Deal found 27/1C$ 399
Wed 12/33:15 p.m.SEA - YKF
1 stop7h 01mWestJet
Thu 13/36:30 a.m.YKF - SEA
1 stop10h 51mWestJet
Deal found 27/1C$ 409
Wed 5/36:05 a.m.SEA - YYZ
Nonstop4h 45mAir Canada
Wed 12/37:05 p.m.YYZ - SEA
Nonstop5h 25mAir Canada
Deal found 27/1C$ 425
Tue 25/36:05 a.m.SEA - YYZ
Nonstop4h 45mUnited Airlines
Fri 28/37:05 p.m.YYZ - SEA
Nonstop5h 25mUnited Airlines
Deal found 27/1C$ 445
Sat 1/311:05 p.m.SEA - YYZ
1 stop7h 12mDelta
Sat 15/31:20 p.m.YYZ - SEA
1 stop8h 39mDelta
Deal found 28/1C$ 456
Fri 2/57:20 a.m.SEA - YTZ
1 stop9h 30mAir Canada
Tue 6/512:25 p.m.YTZ - SEA
1 stop10h 12mAir Canada
Deal found 27/1C$ 464
Tue 3/62:05 p.m.SEA - YHM
1 stop7h 36mWestJet
Sun 8/66:00 a.m.YHM - SEA
1 stop10h 08mWestJet
Deal found 27/1C$ 469
Mon 24/27:47 p.m.SEA - YTZ
2 stops21h 18mMultiple Airlines
Mon 3/311:55 a.m.YTZ - SEA
2 stops15h 30mMultiple Airlines
Deal found 26/1C$ 488
Wed 5/312:59 a.m.SEA - YYZ
1 stop9h 01mAmerican Airlines
Sun 9/35:14 p.m.YYZ - SEA
1 stop8h 55mAmerican Airlines
Deal found 27/1C$ 553

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 28 January 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Wed 26/2

8:30 a.m.-6:43 a.m.

1 stop19h 13m

Toronto Pearson Intl

Sun 2/3

10:40 p.m.-10:00 a.m.

2 stops14h 20m

C$ 357

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Wed 26/2

7:18 a.m.-2:55 p.m.

Nonstop4h 37m

Toronto Pearson Intl

Sun 2/3

4:20 p.m.-6:44 p.m.

Nonstop5h 24m

C$ 383

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Tue 22/4

3:15 p.m.-5:58 a.m.

2 stops11h 43m

Toronto Pearson Intl

Sun 27/4

9:00 a.m.-8:28 p.m.

2 stops14h 28m

C$ 387

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Wed 5/3

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

Nonstop4h 45m

Toronto Pearson Intl

Wed 12/3

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

Nonstop5h 25m

C$ 425

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Tue 25/3

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

Nonstop4h 45m

Toronto Pearson Intl

Sun 30/3

7:05 p.m.-9:26 p.m.

Nonstop5h 21m

C$ 445

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Sat 1/3

11:05 p.m.-9:17 a.m.

1 stop7h 12m

Toronto Pearson Intl

Sat 15/3

1:20 p.m.-6:59 p.m.

1 stop8h 39m

C$ 456

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Thu 8/5

5:45 a.m.-6:37 p.m.

2 stops9h 52m

Toronto Island

Thu 15/5

12:25 p.m.-7:37 p.m.

1 stop10h 12m

C$ 469

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Thu 6/3

5:45 a.m.-8:43 p.m.

2 stops11h 58m

Toronto Island

Sun 9/3

8:25 a.m.-11:46 a.m.

2 stops30h 21m

C$ 528

SeattleToronto

SEA - YKF

SEAYKF

Seattle/Tacoma Intl

Sun 9/2

7:10 a.m.-6:15 a.m.

2 stops20h 05m

Toronto Region of Waterloo Intl

Mon 10/2

1:05 p.m.-5:00 p.m.

3 stops30h 55m

C$ 550

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Wed 5/3

12:59 a.m.-1:00 p.m.

1 stop9h 01m

Toronto Pearson Intl

Sun 9/3

5:14 p.m.-11:09 p.m.

1 stop8h 55m

C$ 553

Flights are sorted by cheapest round-trip flights first.

Deals found on 27/1

Showing 1-10 of 24 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 24 January 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 28 January 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 28 January 2025.

The most flights from SEA to YTO are scheduled on a Monday (4 on average). You will have fewer flight options on Thursday, 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 28 January 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
9,690 reviews
Check prices

Crew

8.5

Overall

8.0

Food

7.1

Boarding

8.2

Entertainment

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
9,690 reviews
Alaska Airlines
8.0
Very good
9,690 reviews
Check prices

Crew

8.5

Overall

8.0

Food

7.1

Boarding

8.2

Entertainment

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
8,458 reviews
Alaska Airlines
8.0
Very good
9,690 reviews
Check prices

Crew

8.5

Overall

8.0

Food

7.1

Boarding

8.2

Entertainment

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
8,934 reviews
Alaska Airlines
8.0
Very good
9,690 reviews
Check prices

Crew

8.5

Overall

8.0

Food

7.1

Boarding

8.2

Entertainment

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
9,690 reviews
Check prices

Crew

8.5

Overall

8.0

Food

7.1

Boarding

8.2

Entertainment

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
2,820 reviews
Alaska Airlines
8.0
Very good
9,690 reviews
Check prices

Crew

8.5

Overall

8.0

Food

7.1

Boarding

8.2

Entertainment

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), 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 2 outbound flights to Toronto per day.

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

    According to our current data, Alaska Airlines (C$ 383), WestJet (C$ 387), and Air Canada (C$ 425) offers the cheapest pricing from Seattle to Toronto. 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?

    For one-way options, check prices for WestJet. According to our data, you can fly for as low as C$ 181. Users have also found prices from C$ 183 and C$ 190 on United Airlines and Delta, respectively.

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

    Most travellers choose Seattle/Tacoma Intl - Toronto Pearson Intl, Seattle/Tacoma Intl - Toronto Region of Waterloo Intl or Seattle/Tacoma Intl - Toronto Island 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: Air Canada (92%), United Airlines (92%), Qatar Airways (88%).

  • What are the cheapest flights from Seattle to Toronto?

    On average you can expect to pay C$ 565 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$ 299.

  • 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

Browse thousands of different options on Cheapflights for your next trip

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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 28 January 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 234AverageC$ 842FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
WestJetCheapestC$ 309AverageC$ 516FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Alaska AirlinesCheapestC$ 384AverageC$ 658FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
United AirlinesCheapestC$ 500AverageC$ 836FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

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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