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Cheap flights from St. Louis to Toronto Pearson Intl Airport from C$ 177

STL — YYZ
11 Oct — 18 Oct1
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

Mon 9/114:26 p.m. -
1 stop20h 44m
Tue 17/1112:20 p.m. -
2 stops30h 20m
Deal found 9/9C$ 488
Mon 7/126:05 p.m. -
1 stop19h 05m
Fri 11/125:15 p.m. -
1 stop8h 26m
Deal found 10/9C$ 489
Thu 1/105:00 a.m. -
1 stop8h 32m
Tue 6/101:15 p.m. -
1 stop12h 04m
Deal found 10/9C$ 490
Thu 19/116:00 a.m. -
1 stop7h 33m
Thu 26/116:00 a.m. -
2 stops11h 34m
Deal found 8/9C$ 503
Fri 4/126:05 p.m. -
1 stop18h 35m
Mon 7/127:15 a.m. -
1 stop18h 26m
Deal found 8/9C$ 514
Sat 7/114:26 p.m. -
1 stop20h 14m
Thu 12/116:30 a.m. -
2 stops36h 10m
Deal found 7/9C$ 526
Fri 2/105:00 a.m. -
1 stop8h 32m
Wed 7/1011:40 a.m. -
1 stop10h 17m
Deal found 10/9C$ 528
Sat 10/1011:20 a.m. -
1 stop10h 55m
Thu 15/106:30 a.m. -
1 stop17h 51m
Deal found 8/9C$ 537
Thu 22/104:30 p.m. -
1 stop26h 35m
Thu 29/109:35 a.m. -
1 stop14h 41m
Deal found 7/9C$ 539
Wed 25/115:59 p.m. -
1 stop18h 41m
Mon 30/112:25 p.m. -
2 stops41h 44m
Deal found 8/9C$ 544
Fri 23/104:30 p.m. -
1 stop20h 15m
Sun 25/106:30 a.m. -
1 stop17h 43m
Deal found 9/9C$ 547
Mon 9/117:00 a.m. -
1 stop8h 34m
Tue 17/113:15 p.m. -
1 stop8h 00m
Deal found 9/9C$ 555

Find flight deals from St. Louis to Pearson Intl

Round-trip from

C$ 488

One-way from

C$ 177

Popular in

January

Cheapest in

December

Average price

C$ 923
9/11-17/11
  • 9/11-17/11
  • 3 total stops
  • 51h 04m total
  • St. Louis to Toronto
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23/10-31/12
  • 23/10-31/12
  • 2 total stops
  • 44h 40m total
  • St. Louis to Toronto
Search Deals
Highest demand for flights based on searches. 2% potential increase in price (C$ 28 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease (C$ 55 potential savings vs. average RT price).
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Average for round-trip flights in September 2026
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Cheapflights Fare Finder

 
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 Lambert-St Louis - YYZ Toronto Pearson Intl

STLYYZ

Lambert-St Louis

Thu 28/1

6:30 a.m.-3:57 p.m.

1 stop8h 27m

Toronto Pearson Intl

Wed 31/12

12:00 a.m.-11:00 p.m.

Nonstop0h 00m

C$ 228

St. LouisToronto

STL Lambert-St Louis - YYZ Toronto Pearson Intl

STLYYZ

Lambert-St Louis

Fri 16/10

6:35 p.m.-7:55 p.m.

3 stops24h 20m

Toronto Pearson Intl

Wed 31/12

12:00 a.m.-11:00 p.m.

Nonstop0h 00m

C$ 245

St. LouisToronto

STL Lambert-St Louis - YYZ Toronto Pearson Intl

STLYYZ

Lambert-St Louis

Fri 23/10

6:35 p.m.-7:55 p.m.

3 stops24h 20m

Toronto Pearson Intl

Wed 31/12

12:00 a.m.-11:00 p.m.

Nonstop0h 00m

C$ 263

St. LouisToronto

STL Lambert-St Louis - YYZ Toronto Pearson Intl

STLYYZ

Lambert-St Louis

Fri 18/9

2:10 p.m.-9:36 p.m.

2 stops30h 26m

Toronto Pearson Intl

Wed 31/12

12:00 a.m.-11:00 p.m.

Nonstop0h 00m

C$ 312
Quickest round-trip

St. LouisToronto

STL Lambert-St Louis - YYZ Toronto Pearson Intl

STLYYZ

Lambert-St Louis

Thu 15/10

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

Nonstop1h 54m

Toronto Pearson Intl

Wed 31/12

12:00 a.m.-11:00 p.m.

Nonstop0h 00m

C$ 390

St. LouisToronto

STL Lambert-St Louis - YYZ Toronto Pearson Intl

STLYYZ

Lambert-St Louis

Fri 16/10

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

Nonstop1h 54m

Toronto Pearson Intl

Wed 31/12

12:00 a.m.-11:00 p.m.

Nonstop0h 00m

C$ 431

St. LouisToronto

STL Lambert-St Louis - YYZ Toronto Pearson Intl

STLYYZ

Lambert-St Louis

Sun 20/9

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

Nonstop1h 54m

Toronto Pearson Intl

Wed 31/12

12:00 a.m.-11:00 p.m.

Nonstop0h 00m

C$ 441

St. LouisToronto

STL Lambert-St Louis - YYZ Toronto Pearson Intl

STLYYZ

Lambert-St Louis

Fri 27/11

8:30 a.m.-7:59 p.m.

2 stops10h 29m

Toronto Pearson Intl

Wed 31/12

12:00 a.m.-11:00 p.m.

Nonstop0h 00m

C$ 452

St. LouisToronto

STL Lambert-St Louis - YYZ Toronto Pearson Intl

STLYYZ

Lambert-St Louis

Tue 20/10

11:35 a.m.-11:54 p.m.

2 stops11h 19m

Toronto Pearson Intl

Wed 31/12

12:00 a.m.-11:00 p.m.

Nonstop0h 00m

C$ 452

St. LouisToronto

STL Lambert-St Louis - YYZ Toronto Pearson Intl

STLYYZ

Lambert-St Louis

Thu 19/11

6:00 a.m.-2:33 p.m.

1 stop7h 33m

Toronto Pearson Intl

Thu 26/11

6:00 a.m.-4:34 p.m.

2 stops11h 34m

C$ 503

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/9

Showing 1-10 of 17 resultsSorted by cheapest first
1
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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

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$ 644). Flying from St. Louis to Toronto Pearson Intl Airport in January is currently the most expensive (average of C$ 1,266). 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?

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$ 792 and C$ 1,155 in November.
The cheapest round-trip price found within the last 5 days was C$ 488 on Multiple Airlines (9 Nov-17 Nov).

Reviews of airlines servicing Pearson Intl

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
11,609 reviews
Check prices

Boarding

7.3

Comfort

7.1

Overall

7.1

Entertainment

6.8

Food

6.3

Crew

7.8

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
11,609 reviews
Air Canada
7.1
Good
11,609 reviews
Check prices

Boarding

7.3

Comfort

7.1

Overall

7.1

Entertainment

6.8

Food

6.3

Crew

7.8

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

  • 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 Delta can get you from St. Louis to Toronto Pearson Intl Airport in just under 7h 33m. Your travel time can differ by up to 2h 50m. 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$ 327 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 (63%), Jazz (63%) or United Airlines (63%) 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, December is the cheapest month in which you can book a flight from St. Louis to Toronto Pearson Intl Airport (average of C$ 644). Flying from St. Louis to Toronto Pearson Intl Airport in January is currently the most expensive (average of C$ 1,266). 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
Oshawa
Barrie
Whitby
Oakville
Burlington
Guelph
Owen Sound
Muskoka
Pickering
Ajax
Richmond Hill
Cambridge
Waterloo
Milton
Peterborough

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for St. Louis to Pearson Intl

Kansas City to Pearson Intl flights
Springfield to Pearson Intl flights

Top airline flying from St. Louis to Pearson Intl

AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 327AverageC$ 728FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

Fly with Cheapflights

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.

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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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