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Pearson Intl

$134+ 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 11/2. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YYZ
ago. 19 — ago. 261
mar. 8/19
mar. 8/26
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 12 days in advance, depart on a Thursday or Sunday 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 agosto 14, 2025.

Round-trip from

$349
(Kiwi.com)

One-way from

$134
(Kiwi.com)

Popular in

November

Cheapest in

January

Average price

$438

Good round-trip deal

$673 or less

Good one-way deal

$280 or less
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 ($14 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 August 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 agosto 14, 2025.

This American Airlines deal was found by Cheapflights users on 8/12. 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.
lun. 10/137:16 amSTL - YYZ
1 stop9h 24mAmerican Airlines
mié. 10/153:10 pmYYZ - STL
1 stop9h 44mAmerican Airlines
Deal found 8/12$345
This Kiwi.com deal was found by Cheapflights users on 8/14. 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.
sáb. 10/119:50 amSTL - YYZ
2 stops10h 17mMultiple Airlines
sáb. 10/189:35 amYYZ - STL
1 stop9h 10mMultiple Airlines
Deal found 8/14$349
This American Airlines deal was found by Cheapflights users on 8/12. 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.
sáb. 11/86:00 amSTL - YYZ
1 stop9h 04mAmerican Airlines
dom. 11/91:14 pmYYZ - STL
1 stop11h 42mAmerican Airlines
Deal found 8/12$360
This Kiwi.com deal was found by Cheapflights users on 8/12. 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.
jue. 9/2510:35 amSTL - YYZ
1 stop9h 20mMultiple Airlines
dom. 9/288:00 pmYYZ - STL
1 stop18h 02mMultiple Airlines
Deal found 8/12$364
This Kiwi.com deal was found by Cheapflights users on 8/12. 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.
vie. 8/229:50 amSTL - YYZ
2 stops10h 18mMultiple Airlines
mié. 9/39:35 amYYZ - STL
1 stop25h 05mMultiple Airlines
Deal found 8/12$365
This American Airlines deal was found by Cheapflights users on 8/13. 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.
dom. 10/126:00 amSTL - YYZ
1 stop7h 30mAmerican Airlines
mié. 10/1511:44 amYYZ - STL
1 stop9h 42mAmerican Airlines
Deal found 8/13$375
This American Airlines deal was found by Cheapflights users on 8/13. 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.
lun. 9/156:05 amSTL - YYZ
1 stop7h 26mAmerican Airlines
lun. 9/2211:44 amYYZ - STL
1 stop9h 41mAmerican Airlines
Deal found 8/13$388
This American Airlines deal was found by Cheapflights users on 8/11. 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.
vie. 10/36:10 amSTL - YYZ
1 stop10h 33mAmerican Airlines
dom. 10/51:15 pmYYZ - STL
1 stop8h 10mAmerican Airlines
Deal found 8/11$405
This United Airlines deal was found by Cheapflights users on 8/12. 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.
sáb. 11/86:43 pmSTL - YYZ
2 stops17h 42mUnited Airlines
dom. 11/94:30 pmYYZ - STL
1 stop24h 16mUnited Airlines
Deal found 8/12$407
This American Airlines deal was found by Cheapflights users on 8/14. 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.
dom. 9/216:05 amSTL - YYZ
1 stop7h 26mAmerican Airlines
jue. 9/251:15 pmYYZ - STL
1 stop11h 33mAmerican Airlines
Deal found 8/14$418
This American Airlines deal was found by Cheapflights users on 8/13. 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.
dom. 9/287:23 amSTL - YYZ
1 stop9h 20mAmerican Airlines
dom. 10/56:30 amYYZ - STL
1 stop7h 53mAmerican Airlines
Deal found 8/13$427
This American Airlines deal was found by Cheapflights users on 8/12. 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.
mar. 9/26:02 amSTL - YYZ
1 stop9h 33mAmerican Airlines
mié. 9/36:30 amYYZ - STL
1 stop15h 02mAmerican Airlines
Deal found 8/12$444

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 agosto 14, 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

lun. 10/13

7:16 am-5:40 pm

1 stop9h 24m

Toronto Pearson Intl

mié. 10/15

3:10 pm-11:54 pm

1 stop9h 44m

$345

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

jue. 10/16

7:16 am-5:40 pm

1 stop9h 24m

Toronto Pearson Intl

lun. 10/20

1:15 pm-8:26 pm

1 stop8h 11m

$345

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

sáb. 10/11

9:50 am-9:07 pm

2 stops10h 17m

Toronto Pearson Intl

sáb. 10/18

9:35 am-5:45 pm

1 stop9h 10m

$349

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

sáb. 11/8

6:00 am-4:04 pm

1 stop9h 04m

Toronto Pearson Intl

dom. 11/9

1:14 pm-11:56 pm

1 stop11h 42m

$360

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

jue. 9/25

10:35 am-8:55 pm

1 stop9h 20m

Toronto Pearson Intl

dom. 9/28

8:00 pm-1:02 pm

1 stop18h 02m

$364

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

vie. 8/22

9:50 am-9:08 pm

2 stops10h 18m

Toronto Pearson Intl

mié. 9/3

9:35 am-9:40 am

1 stop25h 05m

$365

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

sáb. 8/23

9:50 am-9:08 pm

2 stops10h 18m

Toronto Pearson Intl

mié. 9/3

9:35 am-9:40 am

1 stop25h 05m

$365

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

mar. 10/28

7:16 am-5:40 pm

1 stop9h 24m

Toronto Pearson Intl

vie. 10/31

6:30 am-4:09 pm

1 stop10h 39m

$375

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

dom. 10/12

6:00 am-2:30 pm

1 stop7h 30m

Toronto Pearson Intl

mié. 10/15

11:44 am-8:26 pm

1 stop9h 42m

$375

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

mar. 9/23

7:23 am-5:43 pm

1 stop9h 20m

Toronto Pearson Intl

jue. 9/25

3:11 pm-11:48 pm

1 stop9h 37m

$388

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/13

Showing 1-10 of 20 results
1
2

The best insider tips for St. Louis to Toronto Pearson Intl Airport flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your St. Louis to Toronto Pearson Intl Airport trip
Airports
STL

Expect security screening at STL to take 5-10 minutes off-peak, but up to 15 minutes during peak times. Check wait times online before heading to the airport.

Read more about STLby Taryn White
YYZ

For a quick customs experience at YYZ, expect some walking from your gate to customs. Assistance is available for those with mobility concerns.

Read more about YYZby Kaitlyn McInnis
Our travel experts
Taryn White

Taryn White

Expert on STL

Taryn White

Taryn White

Taryn White is a freelance travel writer, digital creator, and travel advisor who has visited nearly 100 countries and all 50 states. She’s familiar with many airports and enjoys beach hopping, boutique hotels, spa experiences, and exploring local culture. Her work has appeared in Travel + Leisure, Condé Nast Traveler, National Geographic, Smithsonian Magazine, AFAR, and more.

Read more
Kaitlyn McInnis

Kaitlyn McInnis

Expert on YYZ

Kaitlyn McInnis

Kaitlyn McInnis

Kaitlyn is a guidebook author and travel writer splitting her time between Atlantic Canada and Istanbul, Türkiye. She has visited over fifty countries and all seven continents, so she is very familiar with many hotels, airports and airlines around the globe. But her favorite type of vacation is sunbathing by the sea with a good book in hand.

Read more

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 August 8, 2025.

Booking 12 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 August is currently the most expensive (average of $348). 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 agosto 14, 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 23% 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 agosto 14, 2025.

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

How much does it cost to fly round-trip from St. Louis to Toronto Pearson Intl Airport?

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 agosto 14, 2025.
Read reviews from past customers who have flown United Airlines, American Airlines, and Air Canada from St. Louis to Toronto Pearson Intl Airport. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,916 reviews

Crew

8.1

Boarding

7.7

Food

6.6

Overall

7.4

Entertainment

7.1

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
8,916 reviews
United Airlines
7.4
Good
8,916 reviews

Crew

8.1

Boarding

7.7

Food

6.6

Overall

7.4

Entertainment

7.1

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
American Airlines
7.2
Good
10,000 reviews
United Airlines
7.4
Good
8,916 reviews

Crew

8.1

Boarding

7.7

Food

6.6

Overall

7.4

Entertainment

7.1

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Air Canada
7.1
Good
9,949 reviews
United Airlines
7.4
Good
8,916 reviews

Crew

8.1

Boarding

7.7

Food

6.6

Overall

7.4

Entertainment

7.1

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

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 4 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 United Airlines is currently your cheapest option to Toronto Pearson Intl Airport, with prices starting at $214. Additional round-trip tickets that might be worth considering are offered by Air Canada and American Airlines, with the lowest prices starting at $220 and $330, respectively. United Airlines is priced at 53% lower than the current average price of a flight leaving 3 months from now.

  • 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 (83%), United Airlines (80%), Jazz( 79%).

  • 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 $193. On average you can expect to pay $1,065. The most popular route, (Lambert-St Louis - Toronto Pearson Intl), can usually be booked for $364.

  • 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 August is currently the most expensive (average of $348). 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 Toronto Pearson Intl Airport?

Book flights to Toronto Pearson Intl Airport if you plan to visit one of these locations
Brampton
Kitchener
Markham
Muskoka
Collingwood
Bracebridge
Brantford
Pickering
Lindsay
Burlington
Peterborough
Oakville
Barrie
Cambridge
Milton
Oshawa
Owen Sound
Ajax
Vaughan
Richmond Hill

Browse thousands of different options on Cheapflights for your next trip

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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 agosto 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$214Average$489FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$220Average$483FlexibilityNo cancel feeOn-time67%
American AirlinesCheapest$330Average$590FlexibilityNo cancel feeOn-time71%

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