Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from Seattle to Toronto from C$ 180

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 30/4. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YTO
2 Apr — 9 Apr1
1 adult

Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Toronto are usually found in January or February, booked 68 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 March 2025.

Round-trip from

C$ 382

One-way from

C$ 180

Popular in

April

Cheapest in

January

Average price

C$ 527

Good round-trip deal

C$ 437 or less

Good one-way deal

C$ 239 or less
1/5-7/5
  • 1/5-7/5
  • 3 total stops
  • 41h 53m total
  • Seattle to Toronto
Search Deals
30/4
  • 30/4
  • 2 total stops
  • 33h 11m total
  • Seattle to Toronto
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (C$ 88 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 22 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2025
Search Deals
Price to beat on a round-trip flight from Seattle/Tacoma Intl to Toronto (YTO).
Search Deals
Price to beat on a one-way flight from Seattle/Tacoma Intl to Toronto (YTO).
Search Deals

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 March 2025.

Thu 1/58:56 p.m.SEA - YYZ
2 stops24h 28mMultiple Airlines
Wed 7/59:45 a.m.YYZ - SEA
1 stop17h 25mMultiple Airlines
Deal found 27/3C$ 382
Thu 1/51:50 p.m.SEA - YKF
1 stop7h 56mMultiple Airlines
Tue 13/56:00 a.m.YKF - SEA
1 stop17h 28mMultiple Airlines
Deal found 27/3C$ 384
Sun 15/61:15 p.m.SEA - YYZ
1 stop8h 18mWestJet
Sat 21/68:00 a.m.YYZ - SEA
1 stop7h 58mWestJet
Deal found 27/3C$ 389
Thu 7/87:05 a.m.SEA - YKF
1 stop8h 51mWestJet
Sun 17/86:00 a.m.YKF - SEA
1 stop9h 58mWestJet
Deal found 28/3C$ 393
Wed 7/56:00 a.m.SEA - YHM
2 stops15h 41mMultiple Airlines
Wed 14/56:00 a.m.YHM - SEA
1 stop9h 58mMultiple Airlines
Deal found 27/3C$ 409
Thu 22/51:50 p.m.SEA - YHM
1 stop7h 51mWestJet
Mon 26/56:00 a.m.YHM - SEA
1 stop9h 58mWestJet
Deal found 28/3C$ 414
Thu 17/48:56 p.m.SEA - YTZ
2 stops18h 57mMultiple Airlines
Tue 22/411:30 a.m.YTZ - SEA
2 stops27h 05mMultiple Airlines
Deal found 26/3C$ 459
Thu 17/46:00 a.m.SEA - YYZ
Nonstop4h 57mAir Canada
Wed 23/47:20 p.m.YYZ - SEA
Nonstop5h 21mAir Canada
Deal found 27/3C$ 472
Thu 17/47:20 a.m.SEA - YYZ
Nonstop4h 40mAlaska Airlines
Tue 22/44:45 p.m.YYZ - SEA
Nonstop5h 14mAlaska Airlines
Deal found 26/3C$ 536
Sat 3/57:00 a.m.SEA - YYZ
1 stop6h 42mUnited Airlines
Sat 3/57:00 p.m.YYZ - SEA
1 stop8h 59mUnited Airlines
Deal found 27/3C$ 547
Sun 18/57:20 a.m.SEA - YTZ
1 stop9h 30mAir Canada
Tue 27/512:25 p.m.YTZ - SEA
1 stop10h 12mAir Canada
Deal found 27/3C$ 550
Wed 16/412:59 a.m.SEA - YYZ
1 stop12h 26mAmerican Airlines
Tue 22/41:29 p.m.YYZ - SEA
1 stop12h 35mAmerican Airlines
Deal found 26/3C$ 580

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 28 March 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

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Thu 1/5

8:56 p.m.-12:24 a.m.

2 stops24h 28m

Toronto Pearson Intl

Wed 7/5

9:45 a.m.-12:10 a.m.

1 stop17h 25m

C$ 382

SeattleToronto

SEA - YKF

SEAYKF

Seattle/Tacoma Intl

Thu 1/5

1:50 p.m.-12:46 a.m.

1 stop7h 56m

Toronto Region of Waterloo Intl

Tue 13/5

6:00 a.m.-8:28 p.m.

1 stop17h 28m

C$ 384

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Sun 15/6

1:15 p.m.-12:33 a.m.

1 stop8h 18m

Toronto Pearson Intl

Sat 21/6

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

1 stop7h 58m

C$ 389

SeattleToronto

SEA - YKF

SEAYKF

Seattle/Tacoma Intl

Thu 1/5

1:50 p.m.-12:46 a.m.

1 stop7h 56m

Toronto Region of Waterloo Intl

Mon 5/5

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

1 stop9h 58m

C$ 404

SeattleHamilton

SEA - YHM

SEAYHM

Seattle/Tacoma Intl

Wed 7/5

6:00 a.m.-12:41 a.m.

2 stops15h 41m

Hamilton

Wed 14/5

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

1 stop9h 58m

C$ 409

SeattleHamilton

SEA - YHM

SEAYHM

Seattle/Tacoma Intl

Thu 22/5

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

1 stop7h 51m

Hamilton

Mon 26/5

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

1 stop9h 58m

C$ 414

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Thu 17/4

8:56 p.m.-6:53 p.m.

2 stops18h 57m

Toronto Island

Tue 22/4

11:30 a.m.-11:35 a.m.

2 stops27h 05m

C$ 459

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Thu 17/4

6:00 a.m.-1:57 p.m.

Nonstop4h 57m

Toronto Pearson Intl

Wed 23/4

7:20 p.m.-9:41 p.m.

Nonstop5h 21m

C$ 472

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Thu 17/4

7:20 a.m.-3:00 p.m.

Nonstop4h 40m

Toronto Pearson Intl

Tue 22/4

4:45 p.m.-6:59 p.m.

Nonstop5h 14m

C$ 536

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Sat 3/5

7:00 a.m.-4:42 p.m.

1 stop6h 42m

Toronto Pearson Intl

Sat 3/5

7:00 p.m.-12:59 a.m.

1 stop8h 59m

C$ 547

Flights are sorted by cheapest round-trip flights first.

Deals found on 26/3

Showing 1-10 of 27 results
1
2
3

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 21 March 2025.

Booking 68 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 March 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.

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 March 2025.
See what other customers who have flown with Alaska Airlines, Delta and SWISS 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
9,797 reviews
Check prices

Entertainment

7.1

Overall

8.0

Comfort

7.9

Food

7.1

Boarding

8.2

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 😥
Alaska Airlines
8.0
Very good
9,797 reviews
Alaska Airlines
8.0
Very good
9,797 reviews
Check prices

Entertainment

7.1

Overall

8.0

Comfort

7.9

Food

7.1

Boarding

8.2

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 😥
Delta
8.0
Very good
7,897 reviews
Alaska Airlines
8.0
Very good
9,797 reviews
Check prices

Entertainment

7.1

Overall

8.0

Comfort

7.9

Food

7.1

Boarding

8.2

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 😥
SWISS
7.5
Good
1,570 reviews
Alaska Airlines
8.0
Very good
9,797 reviews
Check prices

Entertainment

7.1

Overall

8.0

Comfort

7.9

Food

7.1

Boarding

8.2

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 😥
United Airlines
7.4
Good
8,603 reviews
Alaska Airlines
8.0
Very good
9,797 reviews
Check prices

Entertainment

7.1

Overall

8.0

Comfort

7.9

Food

7.1

Boarding

8.2

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 😥
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
9,797 reviews
Check prices

Entertainment

7.1

Overall

8.0

Comfort

7.9

Food

7.1

Boarding

8.2

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 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$ 389), Air Canada (C$ 472), and Alaska Airlines (C$ 536) offers the cheapest pricing from Seattle to Toronto. You may be able to fly from Seattle to Toronto for 38% 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$ 183. Users have also found prices from C$ 216 and C$ 230 on Air Canada and Alaska Airlines, 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 Tahiti Nui (100%), Alaska Airlines (90%), Hawaiian Airlines (90%).

  • What are the cheapest flights from Seattle to Toronto?

    On average you can expect to pay C$ 579 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$ 379.

  • 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 28 March 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 233AverageC$ 842FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
WestJetCheapestC$ 307AverageC$ 431FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Alaska AirlinesCheapestC$ 395AverageC$ 703FlexibilityNo cancel feeOn-time75%
Search Alaska 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.

100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.