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Cheap flights from Toronto Pearson Intl Airport to St. Louis from C$ 178

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 20/5. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — STL
23 Mar — 30 Mar1
1 adult
1 adult, Economy, 0 bags
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 Thursday or Saturday and return on a Friday

Cheap flight deals from Pearson Intl to St. Louis

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 21 February 2026.

Thu 9/46:15 a.m.
YYZ
-
STL
1 stop11h 26m
American Airlines
Mon 13/45:51 a.m.
STL
-
YYZ
1 stop10h 52m
American Airlines
Deal found 20/2C$ 286
Fri 27/24:44 p.m.
YYZ
-
STL
1 stop7h 51m
American Airlines
Sat 28/26:06 a.m.
STL
-
YYZ
1 stop4h 44m
American Airlines
Deal found 20/2C$ 364
Sat 4/41:10 p.m.
YYZ
-
STL
1 stop9h 01m
American Airlines
Fri 10/45:51 a.m.
STL
-
YYZ
1 stop7h 42m
American Airlines
Deal found 20/2C$ 372
Wed 25/26:00 a.m.
YYZ
-
STL
1 stop5h 03m
American Airlines
Sat 28/26:06 a.m.
STL
-
YYZ
1 stop4h 44m
American Airlines
Deal found 20/2C$ 375
Mon 23/27:00 a.m.
YYZ
-
STL
1 stop8h 56m
American Airlines
Wed 25/26:00 a.m.
STL
-
YYZ
1 stop3h 59m
American Airlines
Deal found 19/2C$ 376
Thu 26/24:44 p.m.
YYZ
-
STL
1 stop8h 04m
American Airlines
Mon 2/36:06 a.m.
STL
-
YYZ
1 stop9h 35m
American Airlines
Deal found 20/2C$ 385
Tue 14/411:33 a.m.
YYZ
-
STL
1 stop11h 46m
American Airlines
Wed 15/45:51 a.m.
STL
-
YYZ
1 stop10h 52m
American Airlines
Deal found 18/2C$ 391
Tue 24/210:59 a.m.
YYZ
-
STL
1 stop5h 19m
American Airlines
Sat 28/26:36 p.m.
STL
-
YYZ
1 stop15h 22m
American Airlines
Deal found 19/2C$ 394
Thu 12/37:00 a.m.
YYZ
-
STL
1 stop8h 56m
American Airlines
Mon 16/36:33 p.m.
STL
-
YYZ
1 stop15h 23m
American Airlines
Deal found 20/2C$ 404
Fri 17/43:13 p.m.
YYZ
-
STL
1 stop8h 04m
American Airlines
Mon 20/42:33 p.m.
STL
-
YYZ
1 stop7h 56m
American Airlines
Deal found 19/2C$ 419
Thu 26/36:00 a.m.
YYZ
-
STL
1 stop13h 00m
American Airlines
Mon 30/36:00 a.m.
STL
-
YYZ
1 stop10h 36m
American Airlines
Deal found 18/2C$ 420
Mon 13/43:13 p.m.
YYZ
-
STL
1 stop8h 04m
American Airlines
Wed 15/45:51 a.m.
STL
-
YYZ
1 stop7h 42m
American Airlines
Deal found 17/2C$ 460

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 21 February 2026.

Round-trip from

C$ 286

One-way from

C$ 178

Popular in

July

Cheapest in

June

Average price

C$ 669

Good round-trip deal

C$ 578 or less
American Airlines
  • American Airlines
  • 9/4-13/4
  • 2 total stops
  • 22h 18m total
  • Toronto to St. Louis
Search Deals
American Airlines
  • American Airlines
  • 20/5
  • 1 total stop
  • 9h 43m total
  • Toronto to St. Louis
Search Deals
Highest demand for flights based on searches. 2% potential increase in price (C$ 17 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 11 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals
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 21 February 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

Pearson Intl

Fly to

St. Louis

Route

Depart

Return

Price

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Fri 17/4

3:13 p.m.-10:17 p.m.

1 stop8h 04m

Lambert-St Louis

Mon 20/4

2:33 p.m.-11:29 p.m.

1 stop7h 56m

C$ 419

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Mon 13/4

3:13 p.m.-10:17 p.m.

1 stop8h 04m

Lambert-St Louis

Wed 15/4

5:51 a.m.-2:33 p.m.

1 stop7h 42m

C$ 460

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sat 14/3

1:10 p.m.-9:11 p.m.

1 stop9h 01m

Lambert-St Louis

Wed 18/3

8:00 a.m.-5:36 p.m.

1 stop8h 36m

C$ 509

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Mon 6/4

10:15 a.m.-10:30 a.m.

2 stops25h 15m

Lambert-St Louis

Thu 9/4

4:54 p.m.-2:20 p.m.

1 stop20h 26m

C$ 519

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 19/3

6:00 a.m.-10:03 a.m.

1 stop5h 03m

Lambert-St Louis

Thu 26/3

6:00 a.m.-4:03 p.m.

1 stop9h 03m

C$ 531

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sun 22/3

8:20 p.m.-11:19 p.m.

1 stop27h 59m

Lambert-St Louis

Sun 29/3

8:06 p.m.-6:20 a.m.

1 stop33h 14m

C$ 537

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Mon 9/3

10:58 a.m.-9:21 p.m.

1 stop11h 23m

Lambert-St Louis

Mon 16/3

9:37 a.m.-9:29 p.m.

1 stop10h 52m

C$ 563

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 23/4

3:13 p.m.-11:46 p.m.

1 stop9h 33m

Lambert-St Louis

Sun 26/4

5:51 a.m.-2:33 p.m.

1 stop7h 42m

C$ 564

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Fri 3/4

11:40 a.m.-11:35 p.m.

1 stop12h 55m

Lambert-St Louis

Fri 10/4

5:51 a.m.-5:43 p.m.

1 stop10h 52m

C$ 583

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Mon 13/4

6:27 p.m.-11:36 p.m.

1 stop6h 09m

Lambert-St Louis

Wed 15/4

8:23 p.m.-2:05 p.m.

2 stops16h 42m

C$ 589

Flights are sorted by cheapest round-trip flights first.

Deals found on 18/2

Showing 1-10 of 22 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 18 February 2026.

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 72 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, December is the cheapest month in which you can book a flight from Toronto Pearson Intl Airport to St. Louis (average of C$ 338). Flying from Toronto Pearson Intl Airport to St. Louis in April is currently the most expensive (average of C$ 509). 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 21 February 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.

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 21 February 2026.
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
7.9
Good
8,228 reviews
Check prices

Crew

8.5

Comfort

7.9

Entertainment

7.8

Food

7.2

Overall

7.9

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,228 reviews
Delta
7.9
Good
8,228 reviews
Check prices

Crew

8.5

Comfort

7.9

Entertainment

7.8

Food

7.2

Overall

7.9

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,335 reviews
Delta
7.9
Good
8,228 reviews
Check prices

Crew

8.5

Comfort

7.9

Entertainment

7.8

Food

7.2

Overall

7.9

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
American Airlines
7.2
Good
11,334 reviews
Delta
7.9
Good
8,228 reviews
Check prices

Crew

8.5

Comfort

7.9

Entertainment

7.8

Food

7.2

Overall

7.9

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
WestJet
7.2
Good
3,270 reviews
Delta
7.9
Good
8,228 reviews
Check prices

Crew

8.5

Comfort

7.9

Entertainment

7.8

Food

7.2

Overall

7.9

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Air Canada
7.1
Good
10,734 reviews
Delta
7.9
Good
8,228 reviews
Check prices

Crew

8.5

Comfort

7.9

Entertainment

7.8

Food

7.2

Overall

7.9

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

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 1 inbound flight 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 8h 04m. Fly via American Airlines to get the fastest option. The distance from Toronto Pearson Intl Airport to St. Louis is about 1051 km.

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

    United Airlines, at C$ 330, was found to be the cheapest airline from Toronto Pearson Intl Airport to St. Louis.Alternate airlines to your destination round-trip include American Airlines and Air Canada. United Airlines is 47% 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 (73%), Jazz (73%) or United Airlines (73%) 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$ 607, our data shows the cheapest flight currently is C$ 372. When looking at the most popular route, (Toronto Pearson Intl - Lambert-St Louis), you can expect to pay C$ 453 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, December is the cheapest month in which you can book a flight from Toronto Pearson Intl Airport to St. Louis (average of C$ 338). Flying from Toronto Pearson Intl Airport to St. Louis in April is currently the most expensive (average of C$ 509). 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

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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
Pearson Intl to Columbia flights
Pearson Intl to Quincy flights

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 21 February 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapestC$ 330AverageC$ 573FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
American AirlinesCheapestC$ 369AverageC$ 679FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Air CanadaCheapestC$ 455AverageC$ 589FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
DeltaCheapestC$ 470AverageC$ 640FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
WestJetCheapestC$ 552AverageC$ 977FlexibilityNo cancel feeOn-time60%
Search WestJet flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

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

Cheapflights helps you search for flights from Pearson Intl to St. Louis via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

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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