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St. Louis

$147+ 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 2/4. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — STL
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
1 adult, Economy
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1. Tell us where you want to go

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Cheapflights Tip: The best prices from Toronto Pearson Intl to Lambert-St Louis are usually found in June or May, booked 65 days in advance, depart on a Saturday or Tuesday and return on a Tuesday

Cheap 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 December 12, 2025.

This Kiwi.com deal was found by Cheapflights users on 12/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/317:40 amYYZ - STL
1 stop28h 16mMultiple Airlines
Wed 1/75:11 pmSTL - YYZ
2 stops26h 00mMultiple Airlines
Deal found 12/11$345
This American Airlines deal was found by Cheapflights users on 12/10. 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 12/2610:56 amYYZ - STL
1 stop11h 49mAmerican Airlines
Fri 1/25:30 amSTL - YYZ
1 stop10h 59mAmerican Airlines
Deal found 12/10$399
This Air Canada deal was found by Cheapflights users on 12/11. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/312:15 pmYYZ - STL
1 stop6h 03mAir Canada
Wed 1/74:05 pmSTL - YYZ
Nonstop2h 01mAir Canada
Deal found 12/11$449
This United Airlines deal was found by Cheapflights users on 12/10. 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.
Sat 12/209:00 amYYZ - STL
1 stop6h 26mUnited Airlines
Sat 1/109:57 amSTL - YYZ
1 stop13h 02mUnited Airlines
Deal found 12/10$513
This United Airlines deal was found by Cheapflights users on 12/10. 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.
Wed 12/245:30 pmYYZ - STL
1 stop6h 13mUnited Airlines
Mon 12/296:35 pmSTL - YYZ
1 stop4h 24mUnited Airlines
Deal found 12/10$555
This Air Canada deal was found by Cheapflights users on 12/9. 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.
Sun 12/286:50 amYYZ - STL
1 stop6h 37mAir Canada
Thu 1/14:05 pmSTL - YYZ
Nonstop2h 01mAir Canada
Deal found 12/9$567
This American Airlines deal was found by Cheapflights users on 12/9. 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.
Sun 12/286:00 amYYZ - STL
1 stop8h 14mAmerican Airlines
Thu 1/15:00 amSTL - YYZ
1 stop5h 09mAmerican Airlines
Deal found 12/9$576
This United Airlines deal was found by Cheapflights users on 12/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/236:50 amYYZ - STL
1 stop12h 04mUnited Airlines
Fri 1/98:05 amSTL - YYZ
1 stop6h 57mUnited Airlines
Deal found 12/11$603

Find 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 December 12, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$242
(Kiwi.com)

One-way from

$147
(Kiwi.com)

Popular in

July

Cheapest in

June

Average price

$437
Provider with most accurate pricing for Toronto Pearson Intl-Lambert-St Louis flight deals.
Search Deals
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
Search Deals
One-way flight from Toronto Pearson Intl to Lambert-St Louis
Search Deals
Highest demand for flights based on searches. 1% potential increase in price ($4 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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 December 12, 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

Thu 1/15

7:10 am-10:34 pm

1 stop16h 24m

Lambert-St Louis

Sun 1/18

5:11 pm-8:11 pm

2 stops26h 00m

$242

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 3/5

7:10 am-10:33 pm

1 stop16h 23m

Lambert-St Louis

Sun 3/8

10:44 pm-6:20 am

1 stop30h 36m

$333

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sat 1/10

7:15 am-10:33 pm

2 stops16h 18m

Lambert-St Louis

Mon 1/12

1:07 pm-6:47 am

1 stop16h 40m

$340

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 2/24

6:00 am-1:54 pm

1 stop8h 54m

Lambert-St Louis

Sat 2/28

10:04 am-4:02 pm

1 stop4h 58m

$348

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sat 1/10

7:55 pm-11:39 am

1 stop16h 44m

Lambert-St Louis

Sat 1/17

5:11 pm-2:05 pm

1 stop19h 54m

$367

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Mon 1/12

6:00 am-10:20 am

1 stop5h 20m

Lambert-St Louis

Wed 1/14

6:44 pm-10:53 am

1 stop15h 09m

$368

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 3/26

2:00 pm-3:29 pm

Nonstop2h 29m

Lambert-St Louis

Tue 3/31

4:05 pm-7:02 pm

Nonstop1h 57m

$374

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 1/8

2:00 pm-3:29 pm

Nonstop2h 29m

Lambert-St Louis

Mon 1/12

4:05 pm-7:06 pm

Nonstop2h 01m

$390

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 2/24

2:00 pm-3:29 pm

Nonstop2h 29m

Lambert-St Louis

Sat 2/28

4:05 pm-7:06 pm

Nonstop2h 01m

$390

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Wed 2/4

7:15 am-11:33 pm

1 stop17h 18m

$147

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/11

Showing 1-10 of 18 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 December.
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 December 5, 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 65 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, December is the cheapest month in which you can book a flight from Toronto Pearson Intl Airport to St. Louis (average of $249). Flying from Toronto Pearson Intl Airport to St. Louis in April is currently the most expensive (average of $373). 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 December 12, 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.

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

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 December 12, 2025.
Get a feel of what it's like to fly with 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.
Air Canada
7.1
Good
10,516 reviews

Food

6.3

Comfort

7.1

Crew

7.8

Entertainment

6.8

Boarding

7.3

Overall

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Nov 2025

YYZ - LAS

It's was great and the crew are very nice, captain has a smooth land on the runway 👍
Air Canada
7.1
Good
10,516 reviews
Air Canada
7.1
Good
10,516 reviews

Food

6.3

Comfort

7.1

Crew

7.8

Entertainment

6.8

Boarding

7.3

Overall

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Nov 2025

YYZ - LAS

It's was great and the crew are very nice, captain has a smooth land on the runway 👍

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 1 airline.

  • 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 8h 54m. 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 is the cheapest airline to fly 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. You may be able to fly from Toronto Pearson Intl Airport to St. Louis for 31% less than the average price by searching for this airline.

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

    The cheapest airlines for a one-way flight from Toronto Pearson Intl Airport to St. Louis are Air Canada ($187), American Airlines ($219), and United Airlines ($224).

  • 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 United Airlines (84%), Air Canada (81%) or Jazz (81%) as they are the most reliable in getting you off to your destination on time.

  • 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, December is the cheapest month in which you can book a flight from Toronto Pearson Intl Airport to St. Louis (average of $249). Flying from Toronto Pearson Intl Airport to St. Louis in April is currently the most expensive (average of $373). 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
Swansea
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 airline flying from Pearson Intl to St. Louis

Discover the top airline 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 December 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$324Average$481FlexibilityNo cancel feeOn-time67%

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