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Pearson Intl

$153+ 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 7/6. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YYZ
May 28 — Jun 41
Wed 5/28
Wed 6/4
1 adult, Economy
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Cheapflights Tip: The best prices from Lambert-St Louis to Toronto Pearson Intl are usually found in January or October, booked 50 days in advance, depart on a Thursday or Tuesday and return on a Saturday

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 May 23, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$346
(Mytrip)

One-way from

$153
(Sun Country Air)

Popular in

November

Cheapest in

January

Average price

$408

Good round-trip deal

$698 or less

Good one-way deal

$231 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. 2% potential increase in price ($10 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($14 potential savings vs. average RT price).
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Average for round-trip flights in May 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 May 23, 2025.

This Mytrip deal was found by Cheapflights users on 5/22. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/128:44 amSTL - YYZ
2 stops26h 46mMultiple Airlines
Thu 9/187:55 amYYZ - STL
2 stops24h 54mMultiple Airlines
Deal found 5/22$346
This Mytrip deal was found by Cheapflights users on 5/22. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/147:30 amSTL - YYZ
Nonstop1h 55mAir Canada
Sun 6/1511:30 amYYZ - STL
Nonstop2h 06mAir Canada
Deal found 5/22$355
This American Airlines deal was found by Cheapflights users on 5/22. 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.
Thu 9/118:26 amSTL - YYZ
1 stop8h 14mAmerican Airlines
Mon 9/1511:42 amYYZ - STL
1 stop9h 41mAmerican Airlines
Deal found 5/22$390
This United Airlines deal was found by Cheapflights users on 5/22. 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 6/37:30 amSTL - YYZ
Nonstop1h 55mUnited Airlines
Sat 6/711:30 amYYZ - STL
Nonstop2h 06mUnited Airlines
Deal found 5/22$403
This Kiwi.com deal was found by Cheapflights users on 5/22. 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.
Mon 6/23:40 pmSTL - YYZ
1 stop5h 16mWestJet
Tue 6/108:00 pmYYZ - STL
2 stops14h 43mWestJet
Deal found 5/22$457
This Delta deal was found by Cheapflights users on 5/22. 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.
Wed 7/166:40 amSTL - YYZ
2 stops10h 29mDelta
Mon 7/216:30 amYYZ - STL
1 stop7h 51mDelta
Deal found 5/22$571
This CheapTicketsDeal deal was found by Cheapflights users on 5/22. 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 CheapTicketsDeal is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/234:01 pmSTL - YYZ
1 stop18h 54mWestJet Encore
Mon 5/2612:59 pmYYZ - STL
1 stop22h 44mWestJet Encore
Deal found 5/22$884
This Alaska Airlines deal was found by Cheapflights users on 5/21. 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.
Sun 7/67:44 amSTL - YYZ
2 stops30h 16mAlaska Airlines
Sun 7/134:45 pmYYZ - STL
2 stops25h 02mAlaska Airlines
Deal found 5/21$1,079

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 May 23, 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

Fri 9/12

8:44 am-12:30 pm

2 stops26h 46m

Toronto Pearson Intl

Thu 9/18

7:55 am-7:49 am

2 stops24h 54m

$346

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sat 6/14

7:30 am-10:25 am

Nonstop1h 55m

Toronto Pearson Intl

Sun 6/15

11:30 am-12:36 pm

Nonstop2h 06m

$355

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 9/11

8:26 am-5:40 pm

1 stop8h 14m

Toronto Pearson Intl

Mon 9/15

11:42 am-8:23 pm

1 stop9h 41m

$390

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Tue 6/3

7:30 am-10:25 am

Nonstop1h 55m

Toronto Pearson Intl

Sat 6/7

11:30 am-12:36 pm

Nonstop2h 06m

$403

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Mon 6/2

3:40 pm-9:56 pm

1 stop5h 16m

Toronto Pearson Intl

Tue 6/10

8:00 pm-9:43 am

2 stops14h 43m

$457

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Wed 7/16

6:40 am-6:09 pm

2 stops10h 29m

Toronto Pearson Intl

Mon 7/21

6:30 am-1:21 pm

1 stop7h 51m

$571

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sun 7/6

7:44 am-3:00 pm

2 stops30h 16m

Toronto Pearson Intl

Sun 7/13

4:45 pm-4:47 pm

2 stops25h 02m

$1,079

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sun 7/6

6:36 am-4:50 pm

1 stop9h 14m

$153

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Fri 6/13

6:36 pm-7:55 am

2 stops12h 19m

$166

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Fri 6/20

5:27 pm-11:10 pm

1 stop4h 43m

$187

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/22

Showing 1-10 of 12 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 May.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*2 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
Kiwi.comPrice 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 eDreams the most. eDreams 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 May 16, 2025.

Booking 50 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 May 23, 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 18% on the cost of your flight, compared to a flight at noon.

Weekly flight availability from St. Louis to Toronto Pearson Intl Airport

Explore weekly flight availability from St. Louis to Pearson Intl. 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 May 23, 2025.

The most flights from STL to YYZ are scheduled on a Wednesday (4 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (3 on average).

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 May 23, 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
10,000 reviews

Overall

8.0

Food

7.1

Comfort

7.9

Boarding

8.2

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Comfort

7.9

Boarding

8.2

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,950 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Comfort

7.9

Boarding

8.2

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,745 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Comfort

7.9

Boarding

8.2

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Comfort

7.9

Boarding

8.2

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
WestJet
7.2
Good
2,848 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Comfort

7.9

Boarding

8.2

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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 are 3 flights 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 Air Canada is currently your cheapest option to Toronto Pearson Intl Airport, with prices starting at $355. Additional round-trip tickets that might be worth considering are offered by American Airlines and United Airlines, with the lowest prices starting at $390 and $403, respectively. Air Canada is priced at 22% 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 Sun Country Air, with whom users have recently found tickets for as low as $153. However, be on the lookout for offers from United Airlines and WestJet, 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: United Airlines (71%), Air Canada (49%), Jazz( 37%).

  • 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 $178. On average you can expect to pay $2,596. The most popular route, (Lambert-St Louis - Toronto Pearson Intl), can usually be booked for $363.

  • 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 May 23, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$220Average$527FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$220Average$492FlexibilityNo cancel feeOn-time67%
American AirlinesCheapest$304Average$590FlexibilityNo cancel feeOn-time71%

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