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St. Louis

$143+ Cheap flights from Pearson Intl (YYZ) to St. Louis (STL)

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 2/26. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — STL
Nov 28 — Dec 51
Fri 11/28
Fri 12/5
1 adult, Economy
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Cheapflights Tip: The best prices from Toronto Pearson Intl to Lambert-St Louis are usually found in May or June, booked 21 days in advance, depart on a Tuesday or Saturday and return on a Tuesday

Find flight deals from Pearson Intl to St. Louis

Cheapest flights from Pearson Intl to St. Louis
Explore the most affordable flight options available from Pearson Intl to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 29, 2025.

This American Airlines deal was found by Cheapflights users on 10/27. 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 12/911:36 amYYZ - STL
1 stop9h 48mAmerican Airlines
Wed 12/105:05 amSTL - YYZ
1 stop9h 58mAmerican Airlines
Deal found 10/27$306
This Kiwi.com deal was found by Cheapflights users on 10/29. 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 12/512:50 pmYYZ - STL
1 stop10h 43mMultiple Airlines
Sun 12/149:54 amSTL - YYZ
1 stop24h 49mMultiple Airlines
Deal found 10/29$319
This American Airlines deal was found by Cheapflights users on 10/28. 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.
Fri 12/56:00 amYYZ - STL
1 stop8h 14mAmerican Airlines
Mon 12/85:15 amSTL - YYZ
1 stop9h 48mAmerican Airlines
Deal found 10/28$320
This American Airlines deal was found by Cheapflights users on 10/28. 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.
Fri 12/261:14 pmYYZ - STL
1 stop11h 41mAmerican Airlines
Thu 1/86:00 amSTL - YYZ
1 stop9h 03mAmerican Airlines
Deal found 10/28$331
This American Airlines deal was found by Cheapflights users on 10/26. 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 12/116:00 amYYZ - STL
1 stop11h 19mAmerican Airlines
Thu 12/186:00 amSTL - YYZ
1 stop4h 45mAmerican Airlines
Deal found 10/26$340
This Kiwi.com deal was found by Cheapflights users on 10/29. 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 11/104:00 pmYYZ - STL
2 stops27h 36mMultiple Airlines
Thu 11/204:13 pmSTL - YYZ
1 stop6h 58mMultiple Airlines
Deal found 10/29$362
This Air Canada deal was found by Cheapflights users on 10/28. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/212:00 pmYYZ - STL
Nonstop2h 29mAir Canada
Mon 11/244:05 pmSTL - YYZ
Nonstop2h 01mAir Canada
Deal found 10/28$363
This Kiwi.com deal was found by Cheapflights users on 10/29. 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 11/1911:15 amYYZ - STL
1 stop23h 43mMultiple Airlines
Fri 11/283:53 pmSTL - YYZ
2 stops15h 45mMultiple Airlines
Deal found 10/29$364
This United deal was found by Cheapflights users on 10/27. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/39:00 amYYZ - STL
1 stop4h 15mMultiple Airlines
Wed 12/34:05 pmSTL - YYZ
Nonstop2h 01mMultiple Airlines
Deal found 10/27$372
This United deal was found by Cheapflights users on 10/27. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1112:45 pmYYZ - STL
1 stop11h 57mMultiple Airlines
Tue 11/184:05 pmSTL - YYZ
Nonstop2h 01mMultiple Airlines
Deal found 10/27$378

Cheap flight deals from Pearson Intl to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Pearson Intl (YYZ) to St. Louis (STL). 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 October 29, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$263
(Kiwi.com)

One-way from

$143
(Kiwi.com)

Popular in

February

Cheapest in

May

Average price

$496

Good round-trip deal

$489 or less

Good one-way deal

$323 or less
Provider with most accurate pricing for Toronto Pearson Intl-Lambert-St Louis flight deals.
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Provider most trusted by Cheapflights users for Toronto Pearson Intl-Lambert-St Louis flights.
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From Toronto Pearson Intl to Lambert-St Louis
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One-way flight from Toronto Pearson Intl to Lambert-St Louis
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($28 potential increase over avg. RT price).
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Cheapest flight prices on average. 0% potential price decrease ($5 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals
Price to beat on a round-trip flight from Toronto Pearson Intl to Lambert-St Louis.
Search Deals
Price to beat on a one-way flight from Toronto Pearson Intl to Lambert-St Louis.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Pearson Intl to St. Louis 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 October 29, 2025.
Use the filters below to find and compare flights from Toronto Pearson Intl Airport to St. Louis that are best for you.

Fly from

Pearson Intl

Fly to

St. Louis

Route

Depart

Return

Price

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Fri 1/16

7:10 am-10:37 pm

1 stop16h 27m

Lambert-St Louis

Mon 1/19

8:45 am-12:11 am

1 stop14h 26m

$263

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Wed 1/21

11:30 am-6:14 pm

1 stop7h 44m

Lambert-St Louis

Sat 1/24

6:43 pm-10:53 am

1 stop15h 10m

$303

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 2/24

6:00 am-6:11 pm

1 stop13h 11m

Lambert-St Louis

Sun 3/1

7:00 am-7:01 pm

1 stop11h 01m

$320

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 12/11

6:00 am-4:19 pm

1 stop11h 19m

Lambert-St Louis

Thu 12/18

6:00 am-11:45 am

1 stop4h 45m

$340

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Wed 1/21

5:15 pm-11:01 am

2 stops18h 46m

Lambert-St Louis

Sat 1/24

2:48 pm-11:20 pm

1 stop7h 32m

$361

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Mon 11/10

4:00 pm-6:36 pm

2 stops27h 36m

Lambert-St Louis

Thu 11/20

4:13 pm-12:11 am

1 stop6h 58m

$362

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Fri 11/21

2:00 pm-3:29 pm

Nonstop2h 29m

Lambert-St Louis

Mon 11/24

4:05 pm-7:06 pm

Nonstop2h 01m

$363

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Fri 12/5

2:00 pm-3:29 pm

Nonstop2h 29m

Lambert-St Louis

Mon 12/8

4:05 pm-7:06 pm

Nonstop2h 01m

$363

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Wed 11/19

11:15 am-9:58 am

1 stop23h 43m

Lambert-St Louis

Fri 11/28

3:53 pm-8:38 am

2 stops15h 45m

$364

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 3/3

1:12 pm-10:11 pm

1 stop9h 59m

Lambert-St Louis

Wed 3/4

6:00 am-4:00 pm

1 stop9h 00m

$369

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/27

Showing 1-10 of 20 results
1
2

Compare providers for flights from Pearson Intl to St. Louis

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 Pearson Intl to St. Louis in October.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapOairPrice 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 Toronto Pearson Intl Airport-St. Louis flights, users find the pricing of CheapOair to be most consistent on Cheapflights vs. CheapOair Users can find the same prices on Toronto Pearson Intl Airport-St. Louis flight deals on Cheapflights vs. CheapOair >95% of the time. Price accuracy is based on data collected from Toronto Pearson Intl Airport-St. Louis flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Toronto Pearson Intl Airport-St. Louis flights, Cheapflights users trust CheapOair the most. CheapOair 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 Toronto Pearson Intl Airport-St. Louis 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 Pearson Intl to St. Louis

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

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

Use this chart to determine the optimal time to book a round-trip flight from Pearson Intl to St. Louis. Price data was last updated on October 24, 2025.

To ensure you get the cheapest price possible for a flight from Toronto Pearson Intl Airport to St. Louis, you should look to book at least 21 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Toronto Pearson Intl Airport to St. Louis?

Currently, October is the cheapest month in which you can book a flight from Toronto Pearson Intl Airport to St. Louis (average of $300). Flying from Toronto Pearson Intl Airport to St. Louis in January is currently the most expensive (average of $436). 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 YYZ to STL?

Find hourly flight availability from Pearson Intl to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 29, 2025.

When flying from Toronto Pearson Intl Airport to St. Louis, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. 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 St. Louis. Reviews last updated October 29, 2025.
Get a feel of what it's like to fly with United Airlines and Air Canada from Toronto Pearson Intl Airport to St. Louis by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,999 reviews

Overall

7.4

Entertainment

7.1

Food

6.6

Boarding

7.7

Crew

8.1

Comfort

7.3

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
United Airlines
7.4
Good
8,999 reviews
United Airlines
7.4
Good
8,999 reviews

Overall

7.4

Entertainment

7.1

Food

6.6

Boarding

7.7

Crew

8.1

Comfort

7.3

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
Air Canada
7.1
Good
10,372 reviews
United Airlines
7.4
Good
8,999 reviews

Overall

7.4

Entertainment

7.1

Food

6.6

Boarding

7.7

Crew

8.1

Comfort

7.3

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000

Related info for your journey

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

    Located just 12.7 mi from the city center, Lambert-St Louis is the airport most travelers will use when flying to St. Louis from Toronto Pearson Intl. Booking flights from Toronto Pearson Intl to Lambert-St Louis (STL) should be relatively easy as there is 1 daily inbound flight from Toronto Pearson Intl from 2 different airlines.

  • How long is the flight from Toronto Pearson Intl Airport to St. Louis?

    Airlines like American Airlines fly from Toronto Pearson Intl Airport to St. Louis in about 7h 44m. The time it takes to get you to your destination can typically vary by up to . There are 653 mi between Toronto Pearson Intl Airport and St. Louis.

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

    Flying on Air Canada is currently your cheapest option to St. Louis, with prices starting at $324. Another option worth looking into is United Airlines, starting at $422 round trip. You may be able to fly from Toronto Pearson Intl Airport to St. Louis for 33% less than the average price by searching for these airlines.

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

    No one likes to see their flight delayed. When booking a flight from Toronto Pearson Intl Airport to St. Louis consider choosing Air Canada (82%), Jazz (82%) or United Airlines (82%) as they are the most reliable in getting you off to your destination on time.

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

    Looking at all options, your cheapest flight can be booked for $297. While the most popular route (Toronto Pearson Intl - Lambert-St Louis) can be booked for $263 on average, our data indicates $422 when flying from Toronto Pearson Intl Airport to St. Louis.

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

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

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

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

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

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

    Currently, October is the cheapest month in which you can book a flight from Toronto Pearson Intl Airport to St. Louis (average of $300). Flying from Toronto Pearson Intl Airport to St. Louis in January is currently the most expensive (average of $436). 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?

Book flights to St. Louis if you plan to visit one of these locations
Edwardsville
O'Fallon
Fairview Heights
Maryland Heights
Collinsville
Eureka
Glencoe
St. Peters
Chesterfield
Alton
Farmington
Festus

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Alternative routes for Pearson Intl to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.
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Top 2 airlines flying from Pearson Intl to St. Louis

Discover the top 2 airlines that operate flights from Pearson Intl to St. Louis. 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 October 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$324Average$486FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$422Average$529FlexibilityNo cancel feeOn-time69%

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