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Cheap flights from St. Louis to Toronto Pearson Intl Airport from C$ 203

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 16/9. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YYZ
24 Aug — 31 Aug1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from St. Louis to Pearson Intl

Enter your travel dates to find the best prices.

Cheapest flights from St. Louis to Pearson Intl
Explore the most affordable flight options available from St. Louis to Pearson Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 25 July 2026.

Sat 5/95:00 a.m.
STL
-
YYZ
1 stop8h 33m
American Airlines
Sat 12/93:13 p.m.
YYZ
-
STL
1 stop10h 14m
American Airlines
Deal found 23/7C$ 500
Thu 17/97:27 a.m.
STL
-
YYZ
1 stop9h 17m
American Airlines
Mon 21/96:30 a.m.
YYZ
-
STL
1 stop7h 46m
American Airlines
Deal found 24/7C$ 514
Sat 19/95:00 a.m.
STL
-
YYZ
1 stop8h 32m
American Airlines
Thu 24/96:30 a.m.
YYZ
-
STL
1 stop7h 46m
American Airlines
Deal found 24/7C$ 524
Wed 26/89:32 a.m.
STL
-
YYZ
1 stop7h 58m
American Airlines
Sat 5/91:15 p.m.
YYZ
-
STL
1 stop11h 43m
American Airlines
Deal found 22/7C$ 532
Mon 17/86:00 a.m.
STL
-
YYZ
1 stop7h 33m
American Airlines
Mon 24/83:14 p.m.
YYZ
-
STL
1 stop10h 00m
American Airlines
Deal found 21/7C$ 548
Wed 26/89:32 a.m.
STL
-
YYZ
1 stop7h 58m
American Airlines
Sun 6/97:20 a.m.
YYZ
-
STL
1 stop10h 00m
American Airlines
Deal found 22/7C$ 554
Wed 19/89:32 a.m.
STL
-
YYZ
1 stop7h 58m
American Airlines
Mon 24/83:14 p.m.
YYZ
-
STL
1 stop10h 00m
American Airlines
Deal found 21/7C$ 563
Tue 27/1010:35 a.m.
STL
-
YYZ
2 stops26h 20m
Multiple Airlines
Fri 30/106:30 a.m.
YYZ
-
STL
1 stop14h 09m
Multiple Airlines
Deal found 20/7C$ 579
Thu 17/910:35 a.m.
STL
-
YYZ
2 stops29h 20m
Multiple Airlines
Mon 21/99:50 a.m.
YYZ
-
STL
1 stop10h 49m
Multiple Airlines
Deal found 22/7C$ 597
Fri 2/1010:35 a.m.
STL
-
YYZ
2 stops26h 30m
Multiple Airlines
Mon 5/107:45 a.m.
YYZ
-
STL
1 stop12h 54m
Multiple Airlines
Deal found 23/7C$ 601
Thu 29/108:34 p.m.
STL
-
YYZ
1 stop16h 31m
Multiple Airlines
Fri 13/114:20 p.m.
YYZ
-
STL
2 stops18h 20m
Multiple Airlines
Deal found 22/7C$ 603
Sun 6/92:00 p.m.
STL
-
YYZ
2 stops30h 55m
Multiple Airlines
Sun 13/94:50 p.m.
YYZ
-
STL
1 stop24h 44m
Multiple Airlines
Deal found 24/7C$ 616

Find flight deals from St. Louis to Pearson Intl

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Pearson Intl (YYZ). 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 25 July 2026.

Round-trip from

C$ 500

One-way from

C$ 203

Popular in

January

Cheapest in

December

Average price

C$ 828

Good one-way deal

C$ 260 or less
American Airlines
  • American Airlines
  • 5/9-12/9
  • 2 total stops
  • 18h 47m total
  • St. Louis to Toronto
Search Deals
American Airlines
  • American Airlines
  • 16/9
  • 1 total stop
  • 8h 32m total
  • St. Louis to Toronto
Search Deals
Highest demand for flights based on searches. 1% potential increase in price (C$ 19 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (C$ 56 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals
Price to beat on a one-way flight from Lambert-St Louis to Toronto Pearson Intl.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis to Pearson Intl 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 25 July 2026.
Use the filters below to find and compare flights from St. Louis to Toronto Pearson Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Mon 21/9

7:21 a.m.-6:35 p.m.

1 stop10h 14m

Toronto Pearson Intl

Wed 30/9

6:30 a.m.-1:16 p.m.

1 stop7h 46m

C$ 514

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Tue 15/9

8:00 a.m.-5:01 p.m.

1 stop8h 01m

Toronto Pearson Intl

Sat 19/9

8:50 a.m.-3:38 p.m.

1 stop7h 48m

C$ 751

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Fri 30/10

7:03 a.m.-4:48 p.m.

1 stop8h 45m

Toronto Pearson Intl

Mon 2/11

3:15 p.m.-11:59 p.m.

1 stop9h 44m

C$ 766

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Mon 31/8

6:54 p.m.-12:35 p.m.

1 stop16h 41m

Toronto Pearson Intl

Tue 1/9

6:55 p.m.-8:39 a.m.

1 stop14h 44m

C$ 779

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 3/9

8:55 a.m.-11:52 a.m.

Nonstop1h 57m

Toronto Pearson Intl

Thu 10/9

7:15 p.m.-8:20 p.m.

Nonstop2h 05m

C$ 825

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Tue 11/8

8:50 a.m.-3:46 p.m.

1 stop5h 56m

Toronto Pearson Intl

Tue 11/8

7:15 p.m.-8:24 p.m.

Nonstop2h 09m

C$ 945

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Tue 1/9

5:30 p.m.-11:59 p.m.

1 stop5h 29m

Toronto Pearson Intl

Mon 7/9

12:55 p.m.-2:02 p.m.

Nonstop2h 07m

C$ 958

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Tue 15/9

8:55 a.m.-11:49 a.m.

Nonstop1h 54m

Toronto Pearson Intl

Sat 19/9

2:00 p.m.-6:41 p.m.

1 stop5h 41m

C$ 962

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Tue 27/10

5:34 p.m.-11:59 p.m.

1 stop5h 25m

Toronto Pearson Intl

Fri 30/10

2:10 p.m.-3:26 p.m.

Nonstop2h 16m

C$ 965
Quickest round-trip

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Mon 21/9

8:55 a.m.-11:49 a.m.

Nonstop1h 54m

Toronto Pearson Intl

Wed 30/9

7:15 p.m.-8:20 p.m.

Nonstop2h 05m

C$ 966

Flights are sorted by cheapest round-trip flights first.

Deals found on 22/7

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

Best time to book a flight from St. Louis to Pearson Intl

Have a flexible travel schedule? Discover the best time to fly to Pearson Intl from St. Louis 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 St. Louis to Toronto Pearson Intl Airport

What is the cheapest month to book a flight from St. Louis to Toronto Pearson Intl Airport?

Currently, December is the cheapest month in which you can book a flight from St. Louis to Toronto Pearson Intl Airport (average of C$ 656). Flying from St. Louis to Toronto Pearson Intl Airport in January is currently the most expensive (average of C$ 1,290). 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 STL to YYZ?

Find hourly flight availability from St. Louis to Pearson Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 25 July 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from St. Louis to Toronto Pearson Intl Airport as you normally would.

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

Airfare is below average for this route at the moment.

St. Louis to Toronto Pearson Intl Airport flights typically cost between C$ 727 and C$ 998 in September.
The cheapest round-trip price found within the last 5 days was C$ 500 on American Airlines (5 Sep-12 Sep).

Reviews of airlines servicing Pearson Intl

Get insights into the airlines that provide service to Pearson Intl. 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 Pearson Intl. Reviews last updated 25 July 2026.
Read through reviews of airlines operating flights from St. Louis to Toronto Pearson Intl Airport, such as Air Canada. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Air Canada
7.1
Good
11,382 reviews
Check prices

Crew

7.8

Food

6.3

Comfort

7.1

Boarding

7.3

Overall

7.1

Entertainment

6.8

Reviews

1 / 20
2.0
Mediocre

Shawna,Sep 2025

DCA - YYZ

Business class cabin was *freezing*. Landing was so hard it injured my back - no apology or explanation given
Air Canada
7.1
Good
11,382 reviews
Air Canada
7.1
Good
11,382 reviews
Check prices

Crew

7.8

Food

6.3

Comfort

7.1

Boarding

7.3

Overall

7.1

Entertainment

6.8

Reviews

1 / 20
2.0
Mediocre

Shawna,Sep 2025

DCA - YYZ

Business class cabin was *freezing*. Landing was so hard it injured my back - no apology or explanation given

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Pearson Intl. 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 from for flights from St. Louis to Toronto Pearson Intl?

    Lambert-St Louis (STL) is the airport you will fly out of if you book a flight from St. Louis to Toronto Pearson Intl. You should not have trouble finding flights to Toronto Pearson Intl from Lambert-St Louis; the airport handles an average of 4 outbound flights to Toronto Pearson Intl per day. You should also have plenty of airline options to choose from since 1 airline has flights from the St. Louis airport to Toronto Pearson Intl. It is only a 20.4 km journey to Lambert-St Louis (STL) from St. Louis’s city centre.

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

    American Airlines, United Airlines, and Air Canada can get you from St. Louis to Toronto Pearson Intl Airport in just under 1h 57m. Your travel time can differ by up to 8h 17m. The distance between St. Louis and Toronto Pearson Intl Airport is about 1051 km. Both multi-stop and direct flights can be found to your destination and back.

  • What is the cheapest airline to fly from St. Louis to Toronto Pearson Intl Airport round-trip?

    Our cheapest airline available from St. Louis to Toronto Pearson Intl Airport is Air Canada. Our recent data shows that you can find tickets from as low as C$ 333 on this airline. Air Canada is currently priced 61% below the average price you’ll pay for this route.

  • What are the most reliable airlines from St. Louis to Toronto Pearson Intl Airport?

    Consider Air Canada (69%), Jazz (67%) or United Airlines (47%) when booking your flight. These represent the most reliable airlines when flying from St. Louis to Toronto Pearson Intl Airport.

  • What are the cheapest flights from St. Louis to Toronto Pearson Intl Airport?

    While on average a flight from St. Louis to Toronto Pearson Intl Airport is generally C$ 360, our data shows the cheapest flight currently is C$ 195. When looking at the most popular route, (Lambert-St Louis - Toronto Pearson Intl), you can expect to pay C$ 548 for that flight.

  • Can I find deals for flights from St. Louis to Pearson Intl that include hotel bookings?

    Yes. In addition to deals on St. Louis to Pearson Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Pearson Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Pearson Intl.

  • Can I find deals for business class flights from St. Louis to Pearson Intl?

    Yes. Cheapflights offers flight deals from St. Louis to Pearson Intl 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 St. Louis to Toronto Pearson Intl Airport?

    Currently, December is the cheapest month in which you can book a flight from St. Louis to Toronto Pearson Intl Airport (average of C$ 656). Flying from St. Louis to Toronto Pearson Intl Airport in January is currently the most expensive (average of C$ 1,290). 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 Toronto Pearson Intl Airport?

Book flights to Toronto Pearson Intl Airport if you plan to visit one of these locations
Brampton
Markham
Kitchener
Collingwood
Vaughan
Oakville
Barrie
Oshawa
Burlington
Muskoka
Guelph
Cambridge
Richmond Hill
Pickering
Waterloo
Brantford
Milton
Owen Sound
Whitby
Cobourg

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for St. Louis to Pearson Intl

See prices for flight routes from nearby airports that may be better suited for you.
Kansas City to Pearson Intl flights
Springfield to Pearson Intl flights

Top airline flying from St. Louis to Pearson Intl

Discover the top airline that operate flights from St. Louis to Pearson Intl. 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 25 July 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 333AverageC$ 742FlexibilityNo cancel feeOn-time67%
Search Air Canada 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 St. Louis to Pearson Intl?

Deals for St. Louis to Pearson Intl flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

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

Cheapflights helps you find that perfect flight to Pearson Intl from St. Louis by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

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

Yes, we can. To see specific flights from St. Louis to Pearson Intl with no change fees, users can toggle flexible booking options after using the search form above to find flights.

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

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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