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St. Louis

$186+ 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 9/30. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — STL
Aug 3 — Aug 101
Sun 8/3
Sun 8/10
1 adult, Economy
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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 85 days in advance, depart on a Saturday or Friday and return on a Thursday

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 July 29, 2025.

Round-trip from

$313
(American Airlines)

One-way from

$186
(American Airlines)

Popular in

December

Cheapest in

June

Average price

$477

Good round-trip deal

$576 or less

Good one-way deal

$345 or less
From Toronto Pearson Intl to Lambert-St Louis
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One-way flight from Toronto Pearson Intl to Lambert-St Louis
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Highest demand for flights based on searches. 9% potential increase in price ($48 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Price to beat on a round-trip flight from Toronto Pearson Intl to Lambert-St Louis.
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Price to beat on a one-way flight from Toronto Pearson Intl to Lambert-St Louis.
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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 July 29, 2025.

This American Airlines deal was found by Cheapflights users on 7/27. 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.
Sat 10/111:15 pmYYZ - STL
1 stop11h 39mAmerican Airlines
Wed 10/227:16 amSTL - YYZ
1 stop9h 24mAmerican Airlines
Deal found 7/27$313
This Air Canada deal was found by Cheapflights users on 7/29. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/122:15 pmYYZ - STL
Nonstop2h 03mAir Canada
Sun 9/141:30 pmSTL - YYZ
1 stop7h 09mAir Canada
Deal found 7/29$357
This Kiwi.com deal was found by Cheapflights users on 7/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/126:30 amYYZ - STL
1 stop11h 01mMultiple Airlines
Tue 8/198:00 amSTL - YYZ
1 stop14h 47mMultiple Airlines
Deal found 7/27$360
This United Airlines deal was found by Cheapflights users on 7/27. 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 Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/159:00 amYYZ - STL
1 stop7h 44mUnited Airlines
Sun 10/1912:25 pmSTL - YYZ
1 stop7h 19mUnited Airlines
Deal found 7/27$400
This Delta deal was found by Cheapflights users on 7/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/86:04 amYYZ - STL
1 stop11h 45mDelta
Thu 9/116:05 amSTL - YYZ
1 stop9h 03mDelta
Deal found 7/29$407

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 July 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

Sat 10/11

1:15 pm-11:54 pm

1 stop11h 39m

Lambert-St Louis

Wed 10/22

7:16 am-5:40 pm

1 stop9h 24m

$313

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Fri 9/12

2:15 pm-3:18 pm

Nonstop2h 03m

Lambert-St Louis

Sun 9/14

1:30 pm-9:39 pm

1 stop7h 09m

$357

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 8/12

6:30 am-4:31 pm

1 stop11h 01m

Lambert-St Louis

Tue 8/19

8:00 am-11:47 pm

1 stop14h 47m

$360

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Wed 10/15

9:00 am-3:44 pm

1 stop7h 44m

Lambert-St Louis

Sun 10/19

12:25 pm-8:44 pm

1 stop7h 19m

$400

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Mon 9/8

6:04 am-4:49 pm

1 stop11h 45m

Lambert-St Louis

Thu 9/11

6:05 am-4:08 pm

1 stop9h 03m

$407

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 9/30

1:15 pm-8:32 pm

1 stop8h 17m

$186

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Wed 9/10

9:35 am-9:40 am

1 stop25h 05m

$187

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Fri 9/12

2:15 pm-3:18 pm

Nonstop2h 03m

$210

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 8/19

7:00 am-8:46 pm

3 stops14h 46m

$240

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Mon 10/13

8:00 pm-10:26 am

2 stops15h 26m

$318

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

Showing 1-10 of 11 results
1
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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 July 25, 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 84 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, August is the cheapest month in which you can book a flight from Toronto Pearson Intl Airport to St. Louis (average of $311). Flying from Toronto Pearson Intl Airport to St. Louis in March is currently the most expensive (average of $356). 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 July 29, 2025.

It’s typically best to fly out from Toronto Pearson Intl Airport to St. Louis in the morning. Doing so could potentially save you 34% on the flight price compared to flying at noon, which is usually more expensive.

Weekly flight availability from Toronto Pearson Intl Airport to St. Louis

Explore weekly flight availability from Pearson Intl to St. Louis. 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 July 29, 2025.

The most flights from YYZ to STL are scheduled on a Friday (6 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (4 on average).

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 July 29, 2025.
Get a feel of what it's like to fly with Delta, United Airlines, and American Airlines 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.
Delta
8.0
Very good
7,979 reviews

Overall

8.0

Food

7.3

Entertainment

7.9

Boarding

8.2

Crew

8.5

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Delta
8.0
Very good
7,979 reviews
Delta
8.0
Very good
7,979 reviews

Overall

8.0

Food

7.3

Entertainment

7.9

Boarding

8.2

Crew

8.5

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
United Airlines
7.4
Good
8,896 reviews
Delta
8.0
Very good
7,979 reviews

Overall

8.0

Food

7.3

Entertainment

7.9

Boarding

8.2

Crew

8.5

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,979 reviews

Overall

8.0

Food

7.3

Entertainment

7.9

Boarding

8.2

Crew

8.5

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
WestJet
7.2
Good
2,972 reviews
Delta
8.0
Very good
7,979 reviews

Overall

8.0

Food

7.3

Entertainment

7.9

Boarding

8.2

Crew

8.5

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Air Canada
7.1
Good
9,826 reviews
Delta
8.0
Very good
7,979 reviews

Overall

8.0

Food

7.3

Entertainment

7.9

Boarding

8.2

Crew

8.5

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.

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 4 daily inbound flights from Toronto Pearson Intl from 1 airline.

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

    Flying on American Airlines is currently your cheapest option to St. Louis, with prices starting at $313. Additional round-trip tickets that might be worth considering are offered by Air Canada and United Airlines, with the lowest prices starting at $357 and $400, respectively. You may be able to fly from Toronto Pearson Intl Airport to St. Louis for 35% 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 American Airlines ($186), Air Canada ($210), and United Airlines ($240).

  • 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 Jazz (82%), Air Canada (81%) or United Airlines (72%) 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 $247. While the most popular route (Toronto Pearson Intl - Lambert-St Louis) can be booked for $364 on average our data indicates $497 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, August is the cheapest month in which you can book a flight from Toronto Pearson Intl Airport to St. Louis (average of $311). Flying from Toronto Pearson Intl Airport to St. Louis in March is currently the most expensive (average of $356). 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
O'Fallon
Maryland Heights
Fairview Heights
Collinsville
Eureka
St. Peters
Glencoe
Alton
Chesterfield
Festus
Farmington

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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 July 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$324Average$492FlexibilityNo cancel feeOn-time67%

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