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Cheap flights from St. Louis to Toronto Pearson Intl Airport from C$ 228

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 21/4. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YYZ
9 Apr — 16 Apr1
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 10 March 2026.

Tue 14/47:05 a.m.
STL
-
YYZ
1 stop10h 28m
American Airlines
Wed 15/41:15 p.m.
YYZ
-
STL
1 stop10h 02m
American Airlines
Deal found 5/3C$ 455
Sun 19/49:55 p.m.
STL
-
YYZ
1 stop31h 48m
Multiple Airlines
Sun 26/44:45 p.m.
YYZ
-
STL
2 stops26h 51m
Multiple Airlines
Deal found 5/3C$ 471
Tue 21/44:59 p.m.
STL
-
YYZ
1 stop20h 21m
Multiple Airlines
Tue 28/46:30 a.m.
YYZ
-
STL
2 stops25h 20m
Multiple Airlines
Deal found 7/3C$ 526
Wed 29/48:23 p.m.
STL
-
YYZ
2 stops38h 12m
Multiple Airlines
Wed 6/57:10 a.m.
YYZ
-
STL
1 stop17h 09m
Multiple Airlines
Deal found 7/3C$ 529
Tue 7/47:00 a.m.
STL
-
YYZ
1 stop10h 33m
American Airlines
Tue 14/46:15 a.m.
YYZ
-
STL
1 stop10h 45m
American Airlines
Deal found 10/3C$ 533
Thu 2/49:50 a.m.
STL
-
YYZ
2 stops10h 19m
Multiple Airlines
Sun 5/48:20 p.m.
YYZ
-
STL
1 stop12h 31m
Multiple Airlines
Deal found 5/3C$ 539
Tue 14/44:59 p.m.
STL
-
YYZ
1 stop20h 17m
Multiple Airlines
Fri 17/411:15 a.m.
YYZ
-
STL
2 stops20h 35m
Multiple Airlines
Deal found 6/3C$ 544
Sat 2/512:27 p.m.
STL
-
YYZ
1 stop10h 02m
American Airlines
Sat 9/56:15 a.m.
YYZ
-
STL
1 stop8h 48m
American Airlines
Deal found 7/3C$ 550
Thu 16/47:05 a.m.
STL
-
YYZ
1 stop9h 38m
American Airlines
Mon 20/46:15 a.m.
YYZ
-
STL
1 stop11h 26m
American Airlines
Deal found 5/3C$ 555
Wed 15/44:59 p.m.
STL
-
YYZ
1 stop20h 17m
Multiple Airlines
Sun 19/46:30 a.m.
YYZ
-
STL
2 stops25h 20m
Multiple Airlines
Deal found 9/3C$ 556
Thu 28/59:50 a.m.
STL
-
YYZ
2 stops11h 05m
Multiple Airlines
Sat 30/59:50 a.m.
YYZ
-
STL
1 stop15h 07m
Multiple Airlines
Deal found 5/3C$ 558

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 10 March 2026.

Round-trip from

C$ 455

One-way from

C$ 228

Popular in

January

Cheapest in

March

Average price

C$ 421

Good round-trip deal

C$ 321 or less
American Airlines
  • American Airlines
  • 14/4-15/4
  • 2 total stops
  • 20h 30m total
  • St. Louis to Toronto
Search Deals
American Airlines
  • American Airlines
  • 21/4
  • 1 total stop
  • 7h 42m total
  • St. Louis to Toronto
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (C$ 138 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (C$ 64 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals
Price to beat on a round-trip 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 10 March 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

Thu 23/4

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

1 stop10h 52m

Toronto Pearson Intl

Sun 26/4

6:15 a.m.-2:03 p.m.

1 stop8h 48m

C$ 687

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Mon 1/6

6:45 a.m.-1:30 p.m.

1 stop5h 45m

Toronto Pearson Intl

Tue 30/6

6:15 a.m.-10:45 a.m.

1 stop5h 30m

C$ 714

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sun 19/4

9:10 a.m.-3:46 p.m.

1 stop5h 36m

Toronto Pearson Intl

Sun 26/4

8:50 a.m.-2:24 p.m.

1 stop6h 34m

C$ 730

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Wed 22/4

6:48 a.m.-6:09 p.m.

2 stops10h 21m

Toronto Pearson Intl

Wed 29/4

10:00 a.m.-8:44 p.m.

2 stops11h 44m

C$ 733

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Tue 14/4

6:30 a.m.-2:19 p.m.

2 stops6h 49m

Toronto Pearson Intl

Wed 15/4

8:50 a.m.-2:24 p.m.

1 stop6h 34m

C$ 744

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Mon 13/4

8:21 a.m.-5:56 p.m.

1 stop8h 35m

Toronto Pearson Intl

Wed 15/4

2:45 p.m.-11:11 p.m.

1 stop9h 26m

C$ 749

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sun 2/8

8:00 a.m.-3:46 p.m.

1 stop6h 46m

Toronto Pearson Intl

Sun 2/8

7:00 p.m.-11:45 p.m.

1 stop5h 45m

C$ 772

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Fri 22/5

5:41 p.m.-11:59 p.m.

1 stop5h 18m

Toronto Pearson Intl

Mon 25/5

5:15 p.m.-9:16 p.m.

1 stop5h 01m

C$ 806

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 23/4

6:30 a.m.-1:42 p.m.

1 stop6h 12m

Toronto Pearson Intl

Thu 30/4

8:50 a.m.-2:32 p.m.

1 stop6h 42m

C$ 806
Quickest round-trip

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Tue 7/4

9:10 a.m.-5:56 p.m.

1 stop7h 46m

Toronto Pearson Intl

Tue 14/4

2:10 p.m.-3:25 p.m.

Nonstop2h 15m

C$ 818

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/3

Showing 1-10 of 21 resultsSorted by cheapest first
1
2
3

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, June is the cheapest month in which you can book a flight from St. Louis to Toronto Pearson Intl Airport (average of C$ 240). Flying from St. Louis to Toronto Pearson Intl Airport in January is currently the most expensive (average of C$ 1,060). 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 10 March 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.

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 10 March 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
10,800 reviews
Check prices

Overall

7.1

Crew

7.8

Comfort

7.1

Boarding

7.3

Entertainment

6.8

Food

6.3

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

YXE - YYZ

We were over three hours delayed leaving Saskatoon and missed our connection to Montreal. We were then rerouted all the way to Zurich. We were over seven hours late getting to our final destination. Then our luggage was lost for lost for three days. All three flights were delayed and our trip was definitely impacted.
Air Canada
7.1
Good
10,800 reviews
Air Canada
7.1
Good
10,800 reviews
Check prices

Overall

7.1

Crew

7.8

Comfort

7.1

Boarding

7.3

Entertainment

6.8

Food

6.3

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

YXE - YYZ

We were over three hours delayed leaving Saskatoon and missed our connection to Montreal. We were then rerouted all the way to Zurich. We were over seven hours late getting to our final destination. Then our luggage was lost for lost for three days. All three flights were delayed and our trip was definitely impacted.

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 2 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, WestJet, and United Airlines can get you from St. Louis to Toronto Pearson Intl Airport in just under 5h 36m. Your travel time can differ by up to 5h 16m. 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$ 321 on this airline. Air Canada is currently priced 56% 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 (76%), Jazz (76%) or United Airlines (76%) 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$ 321, our data shows the cheapest flight currently is C$ 321. When looking at the most popular route, (Lambert-St Louis - Toronto Pearson Intl), you can expect to pay C$ 556 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, June is the cheapest month in which you can book a flight from St. Louis to Toronto Pearson Intl Airport (average of C$ 240). Flying from St. Louis to Toronto Pearson Intl Airport in January is currently the most expensive (average of C$ 1,060). 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
Collingwood
Oakville
Markham
Kitchener
Vaughan
Barrie
Burlington
Richmond Hill
Muskoka
Cambridge
Milton
Waterloo
Oshawa
Guelph
Peterborough
St. Catharines
Brantford
Lindsay
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 10 March 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 321AverageC$ 632FlexibilityNo 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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