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Cheap flights from Seattle to Toronto from C$ 94

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 30/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YTO
22 Apr — 29 Apr1
1 adult

Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Toronto are usually found in January or February, booked 69 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 17 April 2025.

Round-trip from

C$ 236

One-way from

C$ 94

Popular in

June

Cheapest in

January

Average price

C$ 617

Good round-trip deal

C$ 500 or less

Good one-way deal

C$ 222 or less
WestJet
  • WestJet
  • 14/8-18/8
  • 2 total stops
  • 17h 49m total
  • Seattle to Toronto
WestJet
  • WestJet
  • 30/5
  • 1 total stop
  • 7h 51m total
  • Seattle to Toronto
Highest demand for flights based on searches. 14% potential increase in price (C$ 141 potential increase over avg. RT price).
Cheapest flight prices on average. 1% potential price decrease (C$ 15 potential savings vs. average RT price).
Average for round-trip flights in April 2025
Price to beat on a round-trip flight from Seattle/Tacoma Intl to Toronto (YTO).
Price to beat on a one-way flight from Seattle/Tacoma Intl to Toronto (YTO).

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 17 April 2025.

Thu 14/81:50 p.m.SEA - YHM
1 stop7h 51mWestJet
Mon 18/86:00 a.m.YHM - SEA
1 stop9h 58mWestJet
Deal found 16/4C$ 236
Fri 2/58:56 p.m.SEA - YHM
2 stops24h 45mMultiple Airlines
Sun 11/56:00 a.m.YHM - SEA
1 stop9h 58mMultiple Airlines
Deal found 17/4C$ 315
Tue 26/82:05 p.m.SEA - YYZ
1 stop7h 19mWestJet
Thu 28/89:00 a.m.YYZ - SEA
2 stops12h 38mWestJet
Deal found 17/4C$ 376
Mon 12/56:00 a.m.SEA - YYZ
3 stops20h 51mMultiple Airlines
Tue 20/58:35 p.m.YYZ - SEA
1 stop30h 35mMultiple Airlines
Deal found 16/4C$ 377
Tue 27/57:05 a.m.SEA - YKF
1 stop14h 41mMultiple Airlines
Thu 29/56:00 a.m.YKF - SEA
3 stops35h 25mMultiple Airlines
Deal found 17/4C$ 377
Tue 17/67:05 a.m.SEA - YKF
1 stop14h 41mWestJet
Sat 12/76:00 a.m.YKF - SEA
2 stops33h 31mWestJet
Deal found 17/4C$ 394
Sun 11/57:20 a.m.SEA - YTZ
1 stop9h 30mAir Canada
Mon 12/512:25 p.m.YTZ - SEA
1 stop10h 12mAir Canada
Deal found 16/4C$ 420
Sun 11/57:20 a.m.SEA - YTZ
1 stop9h 30mMultiple Airlines
Mon 12/55:25 p.m.YTZ - SEA
2 stops33h 45mMultiple Airlines
Deal found 17/4C$ 423
Sun 1/611:40 a.m.SEA - YYZ
Nonstop4h 57mAir Canada
Sun 8/68:30 a.m.YYZ - SEA
Nonstop5h 21mAir Canada
Deal found 17/4C$ 449
Thu 8/57:15 a.m.SEA - YYZ
Nonstop4h 45mAlaska Airlines
Sat 24/54:45 p.m.YYZ - SEA
Nonstop5h 19mAlaska Airlines
Deal found 16/4C$ 456
Thu 8/511:50 p.m.SEA - YYZ
1 stop8h 50mDelta
Sat 24/511:30 a.m.YYZ - SEA
1 stop10h 17mDelta
Deal found 16/4C$ 489
Sat 14/611:24 p.m.SEA - YYZ
1 stop9h 20mUnited Airlines
Sun 22/68:30 a.m.YYZ - SEA
Nonstop5h 21mUnited Airlines
Deal found 16/4C$ 502

Cheapflights Fare Finder

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 17 April 2025.
Use the filters below to find and compare flights from Seattle to Toronto that are best for you.

Fly from

Seattle

Fly to

Toronto

Route

Depart

Return

Price

SeattleHamilton

SEA - YHM

SEAYHM

Seattle/Tacoma Intl

Thu 14/8

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

1 stop7h 51m

Hamilton

Mon 18/8

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

1 stop9h 58m

C$ 236

SeattleHamilton

SEA - YHM

SEAYHM

Seattle/Tacoma Intl

Fri 2/5

8:56 p.m.-12:41 a.m.

2 stops24h 45m

Hamilton

Sun 11/5

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

1 stop9h 58m

C$ 315

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Tue 26/8

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

1 stop7h 19m

Toronto Pearson Intl

Thu 28/8

9:00 a.m.-6:38 p.m.

2 stops12h 38m

C$ 376

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Mon 12/5

6:00 a.m.-5:51 a.m.

3 stops20h 51m

Toronto Pearson Intl

Tue 20/5

8:35 p.m.-12:10 a.m.

1 stop30h 35m

C$ 377

SeattleToronto

SEA - YKF

SEAYKF

Seattle/Tacoma Intl

Tue 27/5

7:05 a.m.-12:46 a.m.

1 stop14h 41m

Toronto Region of Waterloo Intl

Thu 29/5

6:00 a.m.-2:25 p.m.

3 stops35h 25m

C$ 377

SeattleToronto

SEA - YKF

SEAYKF

Seattle/Tacoma Intl

Tue 17/6

7:05 a.m.-12:46 a.m.

1 stop14h 41m

Toronto Region of Waterloo Intl

Sat 12/7

6:00 a.m.-12:31 p.m.

2 stops33h 31m

C$ 394

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Sun 11/5

7:20 a.m.-7:50 p.m.

1 stop9h 30m

Toronto Island

Mon 12/5

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

1 stop10h 12m

C$ 420

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Sun 11/5

7:20 a.m.-7:50 p.m.

1 stop9h 30m

Toronto Island

Mon 12/5

5:25 p.m.-12:10 a.m.

2 stops33h 45m

C$ 423

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Sun 1/6

11:40 a.m.-7:37 p.m.

Nonstop4h 57m

Toronto Pearson Intl

Sun 8/6

8:30 a.m.-10:51 a.m.

Nonstop5h 21m

C$ 430

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Thu 8/5

7:15 a.m.-3:00 p.m.

Nonstop4h 45m

Toronto Pearson Intl

Sat 24/5

4:45 p.m.-7:04 p.m.

Nonstop5h 19m

C$ 456

Flights are sorted by cheapest round-trip flights first.

Deals found on 17/4

Showing 1-10 of 27 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.

Cheapflights Insights

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

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 11 April 2025.

Booking 69 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 17 April 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 58% 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 17 April 2025.

The most flights from SEA to YTO are scheduled on a Thursday (7 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (3 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 17 April 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.

Food

7.1

Comfort

7.9

Entertainment

7.1

Boarding

8.1

Overall

8.0

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥

Food

7.1

Comfort

7.9

Entertainment

7.1

Boarding

8.1

Overall

8.0

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥
8.0
Very good

Food

7.1

Comfort

7.9

Entertainment

7.1

Boarding

8.1

Overall

8.0

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥

Food

7.1

Comfort

7.9

Entertainment

7.1

Boarding

8.1

Overall

8.0

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥

Food

7.1

Comfort

7.9

Entertainment

7.1

Boarding

8.1

Overall

8.0

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥

Food

7.1

Comfort

7.9

Entertainment

7.1

Boarding

8.1

Overall

8.0

Crew

8.5

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. 3 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 5 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$ 236), Air Canada (C$ 420), and Alaska Airlines (C$ 456) offers the cheapest pricing from Seattle to Toronto. You may be able to fly from Seattle to Toronto for 60% 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$ 94. Users have also found prices from C$ 207 and C$ 209 on Delta and Alaska Airlines, respectively.

  • What are the most popular routes 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: Brussels Airlines (100%), Air Tahiti Nui (95%), Alaska Airlines (90%).

  • What are the cheapest flights from Seattle to Toronto?

    On average you can expect to pay C$ 491 for a flight from Seattle to Toronto. The cheapest flight overall is C$ 222 while the most popular route, (Seattle/Tacoma Intl - Toronto Pearson Intl) is currently priced at C$ 290.

  • 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 3 airlines flying from Seattle to Toronto

Discover the top 3 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 17 April 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 226AverageC$ 789FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
WestJetCheapestC$ 298AverageC$ 418FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Alaska AirlinesCheapestC$ 393AverageC$ 667FlexibilityNo cancel feeOn-time75%
Search Alaska 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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