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Pearson Intl

$121+ Cheap flights from St. Louis (STL) to Pearson Intl (YYZ)

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 4/8. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YYZ
Apr 2 — Apr 91
Wed 4/2
Wed 4/9
1 adult, Economy
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Cheapflights Tip: The best prices from Lambert-St Louis to Toronto Pearson Intl are usually found in May or January, booked 53 days in advance, depart on a Thursday or Monday and return on a Thursday

Cheap flight deals from St. Louis to Pearson Intl

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Pearson Intl (YYZ). 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 March 28, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$326
(Kiwi.com)

One-way from

$121
(Kiwi.com)

Popular in

November

Cheapest in

May

Average price

$558

Good round-trip deal

$859 or less

Good one-way deal

$329 or less
Provider with most accurate pricing for Lambert-St Louis-Toronto Pearson Intl flight deals.
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Provider most trusted by Cheapflights users for Lambert-St Louis-Toronto Pearson Intl flights.
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From Lambert-St Louis to Toronto Pearson Intl
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One-way flight from Lambert-St Louis to Toronto Pearson Intl
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Highest demand for flights based on searches. 4% potential increase in price ($20 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($16 potential savings vs. average RT price).
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Average for round-trip flights in March 2025
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Price to beat on a round-trip flight from Lambert-St Louis to Toronto Pearson Intl.
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Price to beat on a one-way flight from Lambert-St Louis to Toronto Pearson Intl.
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Find flight deals from St. Louis to Pearson Intl

Cheapest flights from St. Louis to Pearson Intl
Explore the most affordable flight options available from St. Louis to Pearson Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 28, 2025.

This Kiwi.com deal was found by Cheapflights users on 3/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/44:57 pmSTL - YYZ
1 stop19h 58mMultiple Airlines
Tue 4/88:15 pmYYZ - STL
1 stop28h 31mMultiple Airlines
Deal found 3/27$321
This Delta deal was found by Cheapflights users on 3/27. 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.
Thu 5/86:00 amSTL - YYZ
1 stop9h 10mDelta
Mon 5/1210:20 amYYZ - STL
1 stop8h 42mDelta
Deal found 3/27$391
This Gotogate deal was found by Cheapflights users on 3/27. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/17:30 amSTL - YYZ
Nonstop1h 55mAir Canada
Sun 5/411:30 amYYZ - STL
Nonstop2h 06mAir Canada
Deal found 3/27$421
This American Airlines deal was found by Cheapflights users on 3/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/66:00 amSTL - YYZ
1 stop7h 30mAmerican Airlines
Wed 5/711:32 amYYZ - STL
1 stop11h 20mAmerican Airlines
Deal found 3/27$434
This United Airlines deal was found by Cheapflights users on 3/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/225:35 pmSTL - YYZ
1 stop21h 11mUnited Airlines
Thu 4/247:00 amYYZ - STL
1 stop8h 42mUnited Airlines
Deal found 3/27$487
This Expedia deal was found by Cheapflights users on 3/27. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/16:00 amSTL - YYZ
2 stops11h 04mWestJet
Sun 5/411:34 amYYZ - STL
1 stop4h 37mWestJet
Deal found 3/27$570
This Alaska Airlines deal was found by Cheapflights users on 3/27. 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.
Sat 4/196:44 amSTL - YYZ
1 stop31h 16mAlaska Airlines
Fri 4/254:45 pmYYZ - STL
2 stops30h 43mAlaska Airlines
Deal found 3/27$776

Cheapflights Fare Finder

Customize your flight search to find flights from St. Louis to Pearson Intl 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 March 28, 2025.
Use the filters below to find and compare flights from St. Louis to Toronto Pearson Intl Airport that are best for you.

Fly from

St. Louis

Fly to

Pearson Intl

Route

Depart

Return

Price

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sat 4/26

5:41 pm-9:55 am

1 stop15h 14m

Toronto Pearson Intl

Sun 5/11

4:00 pm-6:41 pm

2 stops27h 41m

$326

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 5/8

6:00 am-4:10 pm

1 stop9h 10m

Toronto Pearson Intl

Mon 5/12

10:20 am-6:02 pm

1 stop8h 42m

$391

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 5/1

7:30 am-10:25 am

Nonstop1h 55m

Toronto Pearson Intl

Sun 5/4

11:30 am-12:36 pm

Nonstop2h 06m

$421

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Tue 5/6

6:00 am-2:30 pm

1 stop7h 30m

Toronto Pearson Intl

Wed 5/7

11:32 am-9:52 pm

1 stop11h 20m

$434

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Tue 4/22

5:35 pm-3:46 pm

1 stop21h 11m

Toronto Pearson Intl

Thu 4/24

7:00 am-2:42 pm

1 stop8h 42m

$487

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 5/1

6:00 am-6:04 pm

2 stops11h 04m

Toronto Pearson Intl

Sun 5/4

11:34 am-3:11 pm

1 stop4h 37m

$570

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sat 4/19

6:44 am-3:00 pm

1 stop31h 16m

Toronto Pearson Intl

Fri 4/25

4:45 pm-10:28 pm

2 stops30h 43m

$776

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Tue 4/8

4:57 pm-11:45 am

1 stop17h 48m

$121

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sat 4/19

6:13 am-4:35 pm

1 stop9h 22m

$189

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sat 7/26

3:40 pm-9:16 am

1 stop16h 36m

$196

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/27

Showing 1-10 of 13 results
1
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Compare providers for flights from St. Louis to Pearson Intl

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Pearson Intl in March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on St. Louis-Toronto Pearson Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Toronto Pearson Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Toronto Pearson Intl Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on St. Louis-Toronto Pearson Intl Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Toronto Pearson Intl Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from St. Louis to Pearson Intl

Have a flexible travel schedule? Discover the best time to fly to Pearson Intl from St. Louis 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 St. Louis to Toronto Pearson Intl Airport

How far ahead should I book a flight from St. Louis to Toronto Pearson Intl Airport?

Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Pearson Intl. Price data was last updated on March 21, 2025.

Booking 53 days in advance of your planned departure date is, on average, the best time to get cheap flights from St. Louis to Toronto Pearson Intl Airport. 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 St. Louis to Toronto Pearson Intl Airport?

Currently, January is the cheapest month in which you can book a flight from St. Louis to Toronto Pearson Intl Airport (average of $243). Flying from St. Louis to Toronto Pearson Intl Airport in July is currently the most expensive (average of $359). 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 STL to YYZ?

Find hourly flight availability from St. Louis to Pearson Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 28, 2025.

It’s optimal to fly from St. Louis to Toronto Pearson Intl Airport in the afternoon. By choosing this option you can save up to 13% on the cost of your flight, compared to a flight at noon.

Rainfall in Pearson Intl by month

Plan your trip to Pearson Intl by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Toronto Pearson Intl Airport ranges from 2.0 - 3.3 inches per month. June is typically the wettest month, when rainfall can reach 3.3 in. February is typically the driest time to visit Toronto Pearson Intl Airport when rainfall is around 2.0 in.

Temperature in Pearson Intl by month

Plan your trip to Pearson Intl by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Toronto Pearson Intl Airport, 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 69.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 21.2 F).

Reviews of airlines servicing Pearson Intl

Get insights into the airlines that provide service to Pearson Intl. 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 Pearson Intl. Reviews last updated March 28, 2025.
See what other customers who have flown with Alaska Airlines, Delta and United Airlines from St. Louis to Toronto have to say. 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
9,798 reviews

Entertainment

7.1

Overall

8.0

Food

7.1

Comfort

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Alaska Airlines
8.0
Very good
9,798 reviews
Alaska Airlines
8.0
Very good
9,798 reviews

Entertainment

7.1

Overall

8.0

Food

7.1

Comfort

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Delta
8.0
Very good
7,896 reviews
Alaska Airlines
8.0
Very good
9,798 reviews

Entertainment

7.1

Overall

8.0

Food

7.1

Comfort

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
United Airlines
7.4
Good
8,603 reviews
Alaska Airlines
8.0
Very good
9,798 reviews

Entertainment

7.1

Overall

8.0

Food

7.1

Comfort

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
9,798 reviews

Entertainment

7.1

Overall

8.0

Food

7.1

Comfort

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
WestJet
7.2
Good
2,785 reviews
Alaska Airlines
8.0
Very good
9,798 reviews

Entertainment

7.1

Overall

8.0

Food

7.1

Comfort

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Pearson Intl. 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 St. Louis to Toronto Pearson Intl?

    If you book a flight to Toronto Pearson Intl from St. Louis, you will be flying from Lambert-St Louis, which is the city’s only airport. Lambert-St Louis (STL) is located 12.7 mi from the center of St. Louis. There is 1 flight from Lambert-St Louis to Toronto Pearson Intl per day from 3 different airlines.

  • What are the cheapest airlines flying from St. Louis to Toronto Pearson Intl Airport round-trip?

    Flying on Delta is currently your cheapest option to Toronto Pearson Intl Airport, with prices starting at $391. Additional round-trip tickets that might be worth considering are offered by Air Canada and American Airlines, with the lowest prices starting at $421 and $434, respectively. Delta is priced at 14% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from St. Louis to Toronto Pearson Intl Airport one-way?

    The cheapest airline one-way is American Airlines, with whom users have recently found tickets for as low as $189. However, be on the lookout for offers from Delta and United Airlines, as they are both options that can get you from St. Louis to Toronto Pearson Intl Airport for a low price.

  • What are the most reliable airlines from St. Louis to Toronto Pearson Intl Airport?

    Before booking your flight to Toronto Pearson Intl Airport from St. Louis, check out the most reliable airlines to get you to your destination on time: Air Canada (71%), Jazz (71%), United Airlines( 71%).

  • What are the cheapest flights from St. Louis to Toronto Pearson Intl Airport?

    The cheapest flight price from St. Louis to Toronto Pearson Intl Airport is $214. On average you can expect to pay $2,375. The most popular route, (Lambert-St Louis - Toronto Pearson Intl), can usually be booked for $315.

  • Can I find deals for flights from St. Louis to Pearson Intl that include hotel bookings?

    Yes. In addition to deals on St. Louis to Pearson Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Pearson Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Pearson Intl.

  • Can I find deals for business class flights from St. Louis to Pearson Intl?

    Yes. Cheapflights offers flight deals from St. Louis to Pearson Intl 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 St. Louis to Toronto Pearson Intl Airport?

    Currently, January is the cheapest month in which you can book a flight from St. Louis to Toronto Pearson Intl Airport (average of $243). Flying from St. Louis to Toronto Pearson Intl Airport in July is currently the most expensive (average of $359). 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 St. Louis?

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Top 3 airlines flying from St. Louis to Pearson Intl

Discover the top 3 airlines that operate flights from St. Louis to Pearson Intl. 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 March 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$223Average$502FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$237Average$537FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$304Average$590FlexibilityNo cancel feeOn-time71%
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