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Cheap flights from Toronto Pearson Intl Airport to St. Louis from C$ 215

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 5/12. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — STL
13 Nov — 20 Nov1
1 adult
1 adult, Economy

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 Thursday or Tuesday and return on a Wednesday

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Enter your travel dates to find the best prices.

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 14 October 2025.

Thu 4/125:15 p.m.YYZ - STL
1 stop16h 30mMultiple Airlines
Wed 10/125:11 p.m.STL - YYZ
1 stop30h 00mMultiple Airlines
Deal found 12/10C$ 400
Mon 10/117:55 p.m.YYZ - STL
2 stops14h 12mMultiple Airlines
Mon 17/112:12 p.m.STL - YYZ
1 stop8h 59mMultiple Airlines
Deal found 13/10C$ 409
Tue 18/116:00 a.m.YYZ - STL
1 stop10h 02mAmerican Airlines
Mon 24/118:39 a.m.STL - YYZ
1 stop8h 01mAmerican Airlines
Deal found 12/10C$ 421
Wed 12/115:15 p.m.YYZ - STL
1 stop21h 02mMultiple Airlines
Wed 19/117:45 p.m.STL - YYZ
2 stops33h 35mMultiple Airlines
Deal found 13/10C$ 442
Wed 12/116:00 a.m.YYZ - STL
1 stop11h 47mAmerican Airlines
Wed 19/116:00 a.m.STL - YYZ
1 stop9h 04mAmerican Airlines
Deal found 13/10C$ 461
Fri 31/105:15 p.m.YYZ - STL
1 stop23h 23mMultiple Airlines
Mon 3/112:12 p.m.STL - YYZ
1 stop8h 59mMultiple Airlines
Deal found 12/10C$ 469
Tue 18/117:15 a.m.YYZ - STL
2 stops40h 46mMultiple Airlines
Mon 24/114:13 p.m.STL - YYZ
1 stop20h 52mMultiple Airlines
Deal found 12/10C$ 472
Tue 11/111:14 p.m.YYZ - STL
1 stop8h 09mAmerican Airlines
Tue 18/116:00 a.m.STL - YYZ
1 stop9h 04mAmerican Airlines
Deal found 12/10C$ 475
Sun 2/118:00 p.m.YYZ - STL
2 stops38h 07mMultiple Airlines
Fri 7/112:12 p.m.STL - YYZ
1 stop8h 59mMultiple Airlines
Deal found 13/10C$ 476
Mon 27/105:15 p.m.YYZ - STL
2 stops40h 52mMultiple Airlines
Fri 31/102:12 p.m.STL - YYZ
1 stop8h 59mMultiple Airlines
Deal found 12/10C$ 478
Sun 9/114:00 p.m.YYZ - STL
2 stops42h 07mMultiple Airlines
Sun 16/112:12 p.m.STL - YYZ
1 stop28h 48mMultiple Airlines
Deal found 13/10C$ 482

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 14 October 2025.

Round-trip from

C$ 400

One-way from

C$ 215

Popular in

February

Cheapest in

May

Average price

C$ 681

Good round-trip deal

C$ 587 or less
4/12-10/12
  • 4/12-10/12
  • 2 total stops
  • 46h 30m total
  • Toronto to St. Louis
Search Deals
5/12
  • 5/12
  • 1 total stop
  • 10h 56m total
  • Toronto to St. Louis
Search Deals
Highest demand for flights based on searches. 5% potential increase in price (C$ 52 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 0% potential price decrease (C$ 10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
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Price to beat on a round-trip 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 629,999 searches. Data last updated 14 October 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

Mon 10/11

7:55 p.m.-9:07 a.m.

2 stops14h 12m

Lambert-St Louis

Mon 17/11

2:12 p.m.-12:11 a.m.

1 stop8h 59m

C$ 409

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 18/11

6:00 a.m.-3:02 p.m.

1 stop10h 02m

Lambert-St Louis

Mon 24/11

8:39 a.m.-5:40 p.m.

1 stop8h 01m

C$ 421

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Wed 12/11

5:15 p.m.-1:17 p.m.

1 stop21h 02m

Lambert-St Louis

Wed 19/11

7:45 p.m.-6:20 a.m.

2 stops33h 35m

C$ 442

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Mon 17/11

6:00 a.m.-2:53 p.m.

1 stop9h 53m

Lambert-St Louis

Thu 20/11

6:00 a.m.-4:04 p.m.

1 stop9h 04m

C$ 461

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Wed 12/11

2:00 p.m.-3:29 p.m.

Nonstop2h 29m

Lambert-St Louis

Wed 19/11

4:05 p.m.-7:06 p.m.

Nonstop2h 01m

C$ 510

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Wed 26/11

10:45 p.m.-3:08 p.m.

2 stops41h 23m

Lambert-St Louis

Wed 3/12

5:11 p.m.-12:11 a.m.

1 stop30h 00m

C$ 520

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 20/11

6:00 a.m.-3:12 p.m.

1 stop10h 12m

Lambert-St Louis

Tue 25/11

6:00 a.m.-4:04 p.m.

1 stop9h 04m

C$ 525

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Mon 27/10

9:35 a.m.-7:26 p.m.

1 stop10h 51m

Lambert-St Louis

Thu 30/10

10:57 a.m.-11:43 a.m.

1 stop23h 46m

C$ 531

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Fri 26/12

2:00 p.m.-3:29 p.m.

Nonstop2h 29m

Lambert-St Louis

Fri 2/1

4:05 p.m.-7:06 p.m.

Nonstop2h 01m

C$ 532

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sun 2/11

8:00 p.m.-9:40 a.m.

1 stop14h 40m

Lambert-St Louis

Fri 7/11

10:35 a.m.-12:11 a.m.

1 stop12h 36m

C$ 539

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/10

Showing 1-10 of 19 results
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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 10 October 2025.

The price you pay for your flight from Toronto Pearson Intl Airport to St. Louis may vary depending on when you book. For the best chance of a lower fare, look to book 21 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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 C$ 409). Flying from Toronto Pearson Intl Airport to St. Louis in January is currently the most expensive (average of C$ 612). 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 14 October 2025.

When flying from Toronto Pearson Intl Airport to St. Louis, the time of day you fly usually plays a role in the price. Save by searching for a flight in the morning, which can drop the price by up to 31% versus a flight in the evening.

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 14 October 2025.
See what other customers who have flown with Delta,United Airlines, andAmerican Airlines from Toronto Pearson Intl Airport to St. Louis have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,975 reviews
Check prices

Entertainment

7.9

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Delta
8.0
Very good
7,975 reviews
Delta
8.0
Very good
7,975 reviews
Check prices

Entertainment

7.9

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
United Airlines
7.4
Good
8,976 reviews
Delta
8.0
Very good
7,975 reviews
Check prices

Entertainment

7.9

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
American Airlines
7.2
Good
11,042 reviews
Delta
8.0
Very good
7,975 reviews
Check prices

Entertainment

7.9

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
WestJet
7.2
Good
3,125 reviews
Delta
8.0
Very good
7,975 reviews
Check prices

Entertainment

7.9

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Air Canada
7.1
Good
10,297 reviews
Delta
8.0
Very good
7,975 reviews
Check prices

Entertainment

7.9

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.

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?

    Lambert-St Louis (STL), located 20.4 km from the city centre, is the airport you fly into when you book flights from Toronto Pearson Intl to St. Louis. 5 airlines have flights to Lambert-St Louis from Toronto Pearson Intl on a regular basis. Booking flights from Toronto Pearson Intl to Lambert-St Louis should not be difficult; the airport handles an average of 2 inbound flights from Toronto Pearson Intl per day.

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

    There are many flights that can get you from Toronto Pearson Intl Airport to St. Louis in 2h 29m. Fly via American Airlines or Air Canada to get the fastest option. The distance from Toronto Pearson Intl Airport to St. Louis is about 1051 km. Both multi-stop and direct flights can be found to your destination and back.

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

    American Airlines, at C$ 437, was found to be the cheapest airline from Toronto Pearson Intl Airport to St. Louis.Alternate airlines to your destination round-trip include Air Canada and Delta. American Airlines is 36% cheaper than the average price of flights available within the next 90 days to this destination.

  • 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 (83%), Jazz (83%) or United Airlines (83%) 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?

    While on average a flight from Toronto Pearson Intl Airport to St. Louis is generally C$ 600, our data shows the cheapest flight currently is C$ 504. When looking at the most popular route, (Toronto Pearson Intl - Lambert-St Louis), you can expect to pay C$ 400 for that flight.

  • 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 C$ 409). Flying from Toronto Pearson Intl Airport to St. Louis in January is currently the most expensive (average of C$ 612). 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

Travelling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Chesterfield
St. Peters

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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.
Pearson Intl to Kansas City flights
Pearson Intl to Springfield flights
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Top 5 airlines flying from Pearson Intl to St. Louis

Discover the top 5 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 629,999 searches. Data last updated 14 October 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapestC$ 437AverageC$ 697FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Air CanadaCheapestC$ 479AverageC$ 678FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
DeltaCheapestC$ 483AverageC$ 665FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
United AirlinesCheapestC$ 483AverageC$ 697FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
WestJetCheapestC$ 567AverageC$ 895FlexibilityNo cancel feeOn-time60%
Search WestJet flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Pearson Intl to St. Louis?

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Why should you use Cheapflights to find cheap flight tickets from Pearson Intl to St. Louis?

Millions of users choose and trust Cheapflights to book the best flight deals from Pearson Intl to St. Louis for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Pearson Intl to St. Louis with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Pearson Intl to St. Louis, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from Pearson Intl to St. Louis become cheaper?

Not ready to book yet? You can track prices for flights from Pearson Intl to St. Louis on Cheapflights with our Price Alert feature and get notified when better prices are available.

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