HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
St. Louis

$191+ 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 3/30. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — STL
Apr 9 — Apr 161
Thu 4/9
Thu 4/16
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Pearson Intl to St. Louis with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.
Cheapflights Tip: The best prices from Toronto Pearson Intl to Lambert-St Louis are usually found in June or May, booked 72 days in advance, depart on a Sunday or Monday 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 March 10, 2026.

This Kiwi.com deal was found by Cheapflights users on 3/5. 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.
Tue 3/247:15 am
YYZ
-
STL
1 stop17h 04m
Multiple Airlines
Tue 3/3111:27 am
STL
-
YYZ
2 stops23h 08m
Multiple Airlines
Deal found 3/5$349
This American Airlines deal was found by Cheapflights users on 3/5. 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 4/213:13 pm
YYZ
-
STL
1 stop8h 06m
American Airlines
Sat 4/258:57 am
STL
-
YYZ
1 stop7h 46m
American Airlines
Deal found 3/5$350
This American Airlines deal was found by Cheapflights users on 3/10. 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.
Wed 5/277:20 am
YYZ
-
STL
1 stop10h 10m
American Airlines
Wed 6/102:36 pm
STL
-
YYZ
1 stop7h 53m
American Airlines
Deal found 3/10$357
This Kiwi.com deal was found by Cheapflights users on 3/5. 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 3/238:20 pm
YYZ
-
STL
1 stop27h 59m
Multiple Airlines
Thu 4/29:50 am
STL
-
YYZ
2 stops10h 19m
Multiple Airlines
Deal found 3/5$368
This Kiwi.com deal was found by Cheapflights users on 3/5. 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 3/258:20 pm
YYZ
-
STL
1 stop11h 57m
Multiple Airlines
Tue 3/3111:27 am
STL
-
YYZ
2 stops23h 08m
Multiple Airlines
Deal found 3/5$369
This Kiwi.com deal was found by Cheapflights users on 3/5. 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.
Tue 3/247:15 am
YYZ
-
STL
1 stop17h 04m
Multiple Airlines
Fri 4/39:50 am
STL
-
YYZ
2 stops10h 19m
Multiple Airlines
Deal found 3/5$370
This Kiwi.com deal was found by Cheapflights users on 3/5. 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.
Tue 3/245:15 pm
YYZ
-
STL
2 stops42h 16m
Multiple Airlines
Mon 3/307:47 am
STL
-
YYZ
1 stop15h 27m
Multiple Airlines
Deal found 3/5$375
This Kiwi.com deal was found by Cheapflights users on 3/5. 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 3/253:40 pm
YYZ
-
STL
2 stops19h 51m
Multiple Airlines
Mon 3/307:47 am
STL
-
YYZ
1 stop15h 27m
Multiple Airlines
Deal found 3/5$383
This Kiwi.com deal was found by Cheapflights users on 3/5. 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.
Tue 3/247:15 am
YYZ
-
STL
1 stop17h 04m
Multiple Airlines
Wed 4/18:16 pm
STL
-
YYZ
2 stops17h 04m
Multiple Airlines
Deal found 3/5$386
This Kiwi.com deal was found by Cheapflights users on 3/5. 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.
Tue 3/247:15 am
YYZ
-
STL
1 stop17h 04m
Multiple Airlines
Sun 3/294:51 pm
STL
-
YYZ
1 stop20h 17m
Multiple Airlines
Deal found 3/5$389
This Kiwi.com deal was found by Cheapflights users on 3/5. 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 3/258:20 pm
YYZ
-
STL
1 stop11h 57m
Multiple Airlines
Fri 4/39:50 am
STL
-
YYZ
2 stops10h 19m
Multiple Airlines
Deal found 3/5$390

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 March 10, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$349
(Kiwi.com)

One-way from

$191
(Kiwi.com)

Popular in

July

Cheapest in

June

Average price

$499

Good round-trip deal

$427 or less

Good one-way deal

$252 or less
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.
Search Deals
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. 3% potential increase in price ($15 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
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 March 10, 2026.
Use the filters below to find and compare flights from Toronto Pearson Intl Airport to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Wed 4/1

4:44 pm-11:44 pm

1 stop8h 00m

Lambert-St Louis

Tue 4/14

2:33 pm-11:29 pm

1 stop7h 56m

$404

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 3/26

8:45 am-2:42 pm

1 stop6h 57m

Lambert-St Louis

Thu 4/2

7:45 am-1:42 pm

1 stop4h 57m

$433

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Fri 3/20

10:05 am-4:32 pm

1 stop7h 27m

Lambert-St Louis

Mon 3/30

6:10 am-4:14 pm

1 stop9h 04m

$433

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Wed 3/25

8:45 am-2:42 pm

1 stop6h 57m

Lambert-St Louis

Thu 4/2

6:30 am-11:49 am

1 stop4h 19m

$433

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Fri 4/17

3:13 pm-10:17 pm

1 stop8h 04m

Lambert-St Louis

Mon 4/20

2:33 pm-11:29 pm

1 stop7h 56m

$439

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sat 3/21

2:00 pm-3:29 pm

Nonstop2h 29m

Lambert-St Louis

Tue 3/31

9:10 am-5:56 pm

1 stop7h 46m

$446

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 3/26

8:45 am-10:59 pm

1 stop15h 14m

Lambert-St Louis

Fri 3/27

7:00 pm-9:58 am

1 stop13h 58m

$468
Quickest round-trip

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 6/4

2:00 pm-8:25 pm

1 stop7h 25m

Lambert-St Louis

Mon 6/8

7:05 am-9:56 am

Nonstop1h 51m

$471

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 4/14

11:00 am-9:52 pm

1 stop11h 52m

Lambert-St Louis

Wed 4/15

7:45 am-4:43 pm

1 stop7h 58m

$474

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sat 8/1

2:15 pm-4:49 pm

1 stop3h 34m

Lambert-St Louis

Thu 8/6

11:51 am-10:00 pm

1 stop9h 09m

$476

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/9

Showing 1-10 of 18 resultsSorted by cheapest first
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 March.
ProviderPrice AccuracyTrust Score*
FlightHubPrice 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Toronto Pearson Intl Airport-St. Louis flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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 March 6, 2026.

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 72 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 $247). Flying from Toronto Pearson Intl Airport to St. Louis in April is currently the most expensive (average of $370). 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 March 10, 2026.

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 March 10, 2026.
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
9,409 reviews

Overall

7.4

Entertainment

7.1

Boarding

7.7

Comfort

7.3

Crew

8.1

Food

6.6

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats
United Airlines
7.4
Good
9,409 reviews
United Airlines
7.4
Good
9,409 reviews

Overall

7.4

Entertainment

7.1

Boarding

7.7

Comfort

7.3

Crew

8.1

Food

6.6

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats
Air Canada
7.1
Good
10,800 reviews
United Airlines
7.4
Good
9,409 reviews

Overall

7.4

Entertainment

7.1

Boarding

7.7

Comfort

7.3

Crew

8.1

Food

6.6

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats

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 are 2 daily inbound flights 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 8h 06m. 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 United Airlines is currently your cheapest option to St. Louis, with prices starting at $226. Another option worth looking into is Air Canada, starting at $323 round trip. You may be able to fly from Toronto Pearson Intl Airport to St. Louis for 50% less than the average price by searching for these airlines.

  • 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 ($314).

  • 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 (75%), Air Canada (38%) or Jazz (38%) 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 $222. While the most popular route (Toronto Pearson Intl - Lambert-St Louis) can be booked for $434 on average, our data indicates $365 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, December is the cheapest month in which you can book a flight from Toronto Pearson Intl Airport to St. Louis (average of $247). Flying from Toronto Pearson Intl Airport to St. Louis in April is currently the most expensive (average of $370). 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
Fenton
Swansea
Fairview Heights
Maryland Heights
Collinsville
Eureka
Wentzville
Glencoe
Chesterfield
Alton
Farmington
Festus

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 March 10, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$226Average$499FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$323Average$475FlexibilityNo cancel feeOn-time67%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
Site
©2026 Cheapflights