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Cheap flights from St. Louis to Toronto Pearson Intl Airport from C$ 129

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 24/2. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YYZ
26 Feb — 5 Mar1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Lambert-St Louis to Toronto Pearson Intl are usually found in May or July, booked 12 days in advance, depart on a Friday or Wednesday and return on a Thursday

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 27 January 2026.

Mon 2/33:49 p.m.
STL
-
YYZ
1 stop7h 25m
Multiple Airlines
Tue 3/37:15 a.m.
YYZ
-
STL
1 stop16h 12m
Multiple Airlines
Deal found 26/1C$ 311
Sun 1/310:11 p.m.
STL
-
YYZ
1 stop31h 32m
Multiple Airlines
Thu 5/38:20 p.m.
YYZ
-
STL
1 stop11h 42m
Multiple Airlines
Deal found 26/1C$ 340
Sun 1/310:11 p.m.
STL
-
YYZ
2 stops20h 25m
Multiple Airlines
Tue 3/37:10 a.m.
YYZ
-
STL
1 stop16h 17m
Multiple Airlines
Deal found 26/1C$ 342
Wed 18/23:49 p.m.
STL
-
YYZ
1 stop7h 25m
Multiple Airlines
Fri 20/27:10 a.m.
YYZ
-
STL
1 stop18h 17m
Multiple Airlines
Deal found 27/1C$ 356
Sat 28/22:51 p.m.
STL
-
YYZ
2 stops38h 52m
Multiple Airlines
Wed 4/38:20 p.m.
YYZ
-
STL
1 stop28h 39m
Multiple Airlines
Deal found 27/1C$ 366
Tue 3/33:49 p.m.
STL
-
YYZ
1 stop7h 25m
Multiple Airlines
Tue 17/37:15 a.m.
YYZ
-
STL
2 stops28h 22m
Multiple Airlines
Deal found 26/1C$ 393
Fri 27/23:49 p.m.
STL
-
YYZ
2 stops26h 45m
Multiple Airlines
Tue 3/37:15 a.m.
YYZ
-
STL
1 stop16h 12m
Multiple Airlines
Deal found 27/1C$ 404
Tue 7/44:54 p.m.
STL
-
YYZ
1 stop30h 20m
Multiple Airlines
Tue 14/43:40 p.m.
YYZ
-
STL
2 stops16h 10m
Multiple Airlines
Deal found 27/1C$ 409
Fri 27/23:49 p.m.
STL
-
YYZ
2 stops26h 45m
Multiple Airlines
Wed 4/37:15 a.m.
YYZ
-
STL
1 stop16h 12m
Multiple Airlines
Deal found 27/1C$ 446

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 27 January 2026.

Round-trip from

C$ 311

One-way from

C$ 129

Popular in

January

Cheapest in

May

Average price

C$ 1,209
2/3-3/3
  • 2/3-3/3
  • 2 total stops
  • 23h 37m total
  • St. Louis to Toronto
Search Deals
24/2
  • 24/2
  • 1 total stop
  • 7h 25m total
  • St. Louis to Toronto
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (C$ 136 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (C$ 61 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
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 27 January 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

St. Louis

Fly to

Pearson Intl

Route

Depart

Return

Price

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sun 1/3

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

2 stops22h 00m

Toronto Pearson Intl

Thu 5/3

8:20 p.m.-7:02 a.m.

1 stop11h 42m

C$ 345

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Mon 13/4

8:41 a.m.-12:14 a.m.

1 stop14h 33m

Toronto Pearson Intl

Tue 14/4

3:40 p.m.-6:50 a.m.

2 stops16h 10m

C$ 456

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Mon 23/2

8:22 p.m.-7:05 p.m.

2 stops21h 43m

Toronto Pearson Intl

Thu 26/2

7:10 a.m.-11:59 p.m.

1 stop17h 49m

C$ 493

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 26/2

3:49 p.m.-12:14 a.m.

1 stop7h 25m

Toronto Pearson Intl

Wed 4/3

7:15 a.m.-10:27 p.m.

1 stop16h 12m

C$ 531

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sat 7/3

8:00 a.m.-9:29 p.m.

1 stop12h 29m

Toronto Pearson Intl

Tue 17/3

11:40 a.m.-9:11 p.m.

1 stop10h 31m

C$ 533

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 19/2

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

1 stop8h 36m

Toronto Pearson Intl

Thu 26/2

6:00 a.m.-3:42 p.m.

1 stop10h 42m

C$ 533

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sun 12/4

11:21 a.m.-2:53 p.m.

2 stops26h 32m

Toronto Pearson Intl

Thu 16/4

7:15 a.m.-11:19 p.m.

1 stop17h 04m

C$ 587

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sat 28/2

3:49 p.m.-12:14 a.m.

1 stop7h 25m

Toronto Pearson Intl

Mon 2/3

7:15 a.m.-11:59 p.m.

1 stop17h 44m

C$ 609

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Fri 20/2

5:50 p.m.-10:40 p.m.

1 stop3h 50m

Toronto Pearson Intl

Mon 23/2

3:40 p.m.-6:51 a.m.

2 stops40h 11m

C$ 616

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Wed 15/4

7:45 a.m.-7:37 p.m.

1 stop10h 52m

Toronto Pearson Intl

Sun 19/4

9:00 p.m.-9:08 p.m.

1 stop25h 08m

C$ 634

Flights are sorted by cheapest round-trip flights first.

Deals found on 27/1

Showing 1-10 of 20 results
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

How far ahead should I book a flight from St. Louis to Toronto Pearson Intl Airport?

Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Pearson Intl. Price data was last updated on 23 January 2026.

The best time to book flights from St. Louis to Toronto Pearson Intl Airport is 12 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, June is the cheapest month in which you can book a flight from St. Louis to Toronto Pearson Intl Airport (average of C$ 244). Flying from St. Louis to Toronto Pearson Intl Airport in January is currently the most expensive (average of C$ 1,069). 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 27 January 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?

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 27 January 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
10,660 reviews
Check prices

Overall

7.1

Food

6.3

Crew

7.8

Entertainment

6.8

Boarding

7.3

Comfort

7.1

Reviews

1 / 20
4.0
Okay

Sugith,Jan 2026

YSB - YYZ

Left 2 hours late. Stuck on plane for an hour after boarding before take off.
Air Canada
7.1
Good
10,660 reviews
Air Canada
7.1
Good
10,660 reviews
Check prices

Overall

7.1

Food

6.3

Crew

7.8

Entertainment

6.8

Boarding

7.3

Comfort

7.1

Reviews

1 / 20
4.0
Okay

Sugith,Jan 2026

YSB - YYZ

Left 2 hours late. Stuck on plane for an hour after boarding before take off.

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 1 outbound flight 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 can get you from St. Louis to Toronto Pearson Intl Airport in just under 12h 29m. Your travel time can differ by up to . The distance between St. Louis and Toronto Pearson Intl Airport is about 1051 km.

  • 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$ 298 on this airline. Air Canada is currently priced 59% 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 (72%), Jazz (72%) or United Airlines (72%) when booking your flight. These represent the most reliable airlines when flying from St. Louis to Toronto Pearson Intl Airport.

  • 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, June is the cheapest month in which you can book a flight from St. Louis to Toronto Pearson Intl Airport (average of C$ 244). Flying from St. Louis to Toronto Pearson Intl Airport in January is currently the most expensive (average of C$ 1,069). 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
Oakville
Collingwood
Kitchener
Markham
Vaughan
Barrie
Burlington
Richmond Hill
Milton
Cambridge
Muskoka
Waterloo
Oshawa
Guelph
Lindsay
Peterborough
Brantford
St. Catharines
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 27 January 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 298AverageC$ 638FlexibilityNo 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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