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Pearson Intl

$105+ 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 10/24. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YYZ
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
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 Tuesday or Thursday 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 September 17, 2025.

Round-trip from

$249
(Kiwi.com)

One-way from

$105
(Kiwi.com)

Popular in

November

Cheapest in

January

Average price

$489

Good round-trip deal

$672 or less

Good one-way deal

$297 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. 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 ($15 potential savings vs. average RT price).
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Average for round-trip flights in September 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 September 17, 2025.

This Kiwi.com deal was found by Cheapflights users on 9/16. 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.
Thu 10/3010:57 amSTL - YYZ
1 stop26h 43mMultiple Airlines
Sun 11/28:00 pmYYZ - STL
1 stop14h 40mMultiple Airlines
Deal found 9/16$285
This Kiwi.com deal was found by Cheapflights users on 9/17. 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.
Wed 10/157:52 pmSTL - YYZ
2 stops23h 06mMultiple Airlines
Wed 10/226:30 amYYZ - STL
1 stop28h 32mMultiple Airlines
Deal found 9/17$300
This Kiwi.com deal was found by Cheapflights users on 9/16. 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.
Sun 10/54:00 pmSTL - YYZ
2 stops27h 55mMultiple Airlines
Wed 10/156:30 amYYZ - STL
1 stop28h 32mMultiple Airlines
Deal found 9/16$319
This Kiwi.com deal was found by Cheapflights users on 9/17. 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.
Thu 10/1610:57 amSTL - YYZ
1 stop11h 55mMultiple Airlines
Thu 10/239:35 amYYZ - STL
2 stops25h 41mMultiple Airlines
Deal found 9/17$328
This Kiwi.com deal was found by Cheapflights users on 9/15. 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.
Wed 10/157:52 pmSTL - YYZ
2 stops23h 06mMultiple Airlines
Sat 10/186:30 amYYZ - STL
1 stop12h 40mMultiple Airlines
Deal found 9/15$329
This Kiwi.com deal was found by Cheapflights users on 9/15. 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.
Thu 10/910:57 amSTL - YYZ
1 stop11h 55mMultiple Airlines
Thu 10/166:30 amYYZ - STL
2 stops29h 07mMultiple Airlines
Deal found 9/15$331
This Kiwi.com deal was found by Cheapflights users on 9/16. 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 11/172:12 pmSTL - YYZ
1 stop8h 59mMultiple Airlines
Thu 11/205:15 pmYYZ - STL
1 stop7h 42mMultiple Airlines
Deal found 9/16$333
This Kiwi.com deal was found by Cheapflights users on 9/16. 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.
Sat 11/17:15 pmSTL - YYZ
1 stop26h 57mMultiple Airlines
Fri 11/712:50 pmYYZ - STL
2 stops21h 17mMultiple Airlines
Deal found 9/16$338
This Kiwi.com deal was found by Cheapflights users on 9/17. 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.
Thu 11/1312:20 pmSTL - YYZ
1 stop25h 20mMultiple Airlines
Sun 11/168:00 pmYYZ - STL
1 stop14h 40mMultiple Airlines
Deal found 9/17$344

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 September 17, 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

Thu 10/30

10:57 am-2:40 pm

1 stop26h 43m

Toronto Pearson Intl

Sun 11/2

8:00 pm-9:40 am

1 stop14h 40m

$285

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 10/16

10:57 am-11:52 pm

1 stop11h 55m

Toronto Pearson Intl

Thu 10/23

9:35 am-10:16 am

2 stops25h 41m

$328

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 10/9

10:57 am-11:52 pm

1 stop11h 55m

Toronto Pearson Intl

Thu 10/16

6:30 am-10:37 am

2 stops29h 07m

$331

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sat 11/1

7:15 pm-11:12 pm

1 stop26h 57m

Toronto Pearson Intl

Fri 11/7

12:50 pm-3:38 pm

1 stop27h 48m

$346

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 10/9

10:57 am-11:52 pm

1 stop11h 55m

Toronto Pearson Intl

Sun 10/12

10:25 pm-9:07 am

2 stops35h 42m

$395

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sat 11/8

7:45 pm-2:20 pm

2 stops17h 35m

Toronto Pearson Intl

Tue 11/11

6:30 am-11:59 am

1 stop6h 29m

$423

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Wed 10/15

7:52 pm-7:58 pm

2 stops23h 06m

Toronto Pearson Intl

Sun 10/19

6:09 pm-5:29 pm

1 stop24h 20m

$430

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Fri 10/3

9:50 am-9:07 pm

2 stops10h 17m

Toronto Pearson Intl

Mon 10/6

9:50 am-8:37 pm

1 stop11h 47m

$445

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Wed 10/15

9:31 am-4:09 pm

1 stop5h 38m

Toronto Pearson Intl

Wed 10/22

6:30 am-10:02 am

1 stop28h 32m

$457

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Mon 9/29

1:57 pm-10:40 pm

1 stop7h 43m

Toronto Pearson Intl

Tue 9/30

9:30 am-9:06 am

2 stops24h 36m

$464

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/16

Showing 1-10 of 17 results
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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 September 12, 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 September 17, 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 25% on the cost of your flight, compared to a flight at noon.

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 September 17, 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
8,926 reviews

Overall

7.4

Boarding

7.7

Crew

8.1

Comfort

7.3

Food

6.6

Entertainment

7.1

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
8,926 reviews
United Airlines
7.4
Good
8,926 reviews

Overall

7.4

Boarding

7.7

Crew

8.1

Comfort

7.3

Food

6.6

Entertainment

7.1

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
8,926 reviews

Overall

7.4

Boarding

7.7

Crew

8.1

Comfort

7.3

Food

6.6

Entertainment

7.1

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
10,000 reviews
United Airlines
7.4
Good
8,926 reviews

Overall

7.4

Boarding

7.7

Crew

8.1

Comfort

7.3

Food

6.6

Entertainment

7.1

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 5 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 54% 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 (90%), Jazz (90%), United Airlines( 60%).

  • 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 $221. On average you can expect to pay $1,287. The most popular route, (Lambert-St Louis - Toronto Pearson Intl), can usually be booked for $285.

  • 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
Collingwood
Oakville
Brantford
Pickering
Lindsay
Peterborough
Barrie
Cambridge
Milton
Oshawa
Burlington
Owen Sound
Ajax
Vaughan
Richmond Hill
Gravenhurst
St. Catharines

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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 September 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$214Average$527FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$220Average$508FlexibilityNo cancel feeOn-time67%
American AirlinesCheapest$330Average$612FlexibilityNo cancel feeOn-time71%

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