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Cheap flights from St. Louis to Toronto Pearson Intl Airport from C$ 227

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 22/7. Fares are subject to change and may not be available on all flights or dates of travel.
STL — YYZ
20 Apr — 27 Apr1
1 adult

Cheapflights Tip: The best prices from Lambert-St Louis to Toronto Pearson Intl are usually found in January or October, booked 53 days in advance, depart on a Wednesday or Monday and return on a Tuesday

Cheap 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 15 April 2025.

Round-trip from

C$ 424

One-way from

C$ 227

Popular in

April

Cheapest in

January

Average price

C$ 1,050

Good one-way deal

C$ 232 or less
13/5-20/5
  • 13/5-20/5
  • 2 total stops
  • 27h 58m total
  • St. Louis to Toronto
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22/7
  • 22/7
  • 1 total stop
  • 19h 08m total
  • St. Louis to Toronto
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Highest demand for flights based on searches. 13% potential increase in price (C$ 140 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease (C$ 49 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Price to beat on a one-way flight from Lambert-St Louis to Toronto Pearson Intl.
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Find flight deals from St. Louis to Pearson Intl

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 15 April 2025.

Tue 13/55:45 p.m.STL - YYZ
1 stop19h 14mMultiple Airlines
Tue 20/54:00 p.m.YYZ - STL
1 stop8h 44mMultiple Airlines
Deal found 14/4C$ 424
Thu 8/57:30 a.m.STL - YYZ
Nonstop1h 55mAir Canada
Mon 12/511:30 a.m.YYZ - STL
Nonstop2h 06mAir Canada
Deal found 15/4C$ 565
Tue 15/712:00 p.m.STL - YYZ
1 stop9h 52mDelta
Tue 22/76:15 a.m.YYZ - STL
1 stop9h 34mDelta
Deal found 14/4C$ 591
Wed 7/55:00 a.m.STL - YYZ
1 stop11h 35mAmerican Airlines
Mon 12/51:15 p.m.YYZ - STL
1 stop11h 36mAmerican Airlines
Deal found 14/4C$ 605
Wed 7/52:30 p.m.STL - YYZ
Nonstop2h 00mUnited Airlines
Mon 12/511:30 a.m.YYZ - STL
Nonstop2h 06mUnited Airlines
Deal found 14/4C$ 623
Fri 30/56:00 a.m.STL - YYZ
2 stops23h 54mWestJet
Sun 1/66:30 a.m.YYZ - STL
1 stop5h 17mWestJet
Deal found 14/4C$ 754
Thu 8/56:52 a.m.STL - YYZ
2 stops31h 08mAlaska Airlines
Mon 12/53:10 p.m.YYZ - STL
2 stops33h 49mAlaska Airlines
Deal found 15/4C$ 1,111

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 15 April 2025.
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

Tue 13/5

5:45 p.m.-1:59 p.m.

1 stop19h 14m

Toronto Pearson Intl

Tue 20/5

4:00 p.m.-11:44 p.m.

1 stop8h 44m

C$ 424

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 8/5

7:30 a.m.-10:25 a.m.

Nonstop1h 55m

Toronto Pearson Intl

Mon 12/5

11:30 a.m.-12:36 p.m.

Nonstop2h 06m

C$ 565

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Tue 15/7

12:00 p.m.-10:52 p.m.

1 stop9h 52m

Toronto Pearson Intl

Tue 22/7

6:15 a.m.-2:49 p.m.

1 stop9h 34m

C$ 591

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Wed 7/5

5:00 a.m.-5:35 p.m.

1 stop11h 35m

Toronto Pearson Intl

Mon 12/5

1:15 p.m.-11:51 p.m.

1 stop11h 36m

C$ 605

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Wed 7/5

2:30 p.m.-5:30 p.m.

Nonstop2h 00m

Toronto Pearson Intl

Mon 12/5

11:30 a.m.-12:36 p.m.

Nonstop2h 06m

C$ 623

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Fri 30/5

6:00 a.m.-6:54 a.m.

2 stops23h 54m

Toronto Pearson Intl

Sun 1/6

6:30 a.m.-10:47 a.m.

1 stop5h 17m

C$ 754

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 8/5

6:52 a.m.-3:00 p.m.

2 stops31h 08m

Toronto Pearson Intl

Mon 12/5

3:10 p.m.-11:59 p.m.

2 stops33h 49m

C$ 1,111

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Tue 22/7

5:47 p.m.-1:55 p.m.

1 stop19h 08m

C$ 227

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sun 1/6

7:30 a.m.-10:25 a.m.

Nonstop1h 55m

C$ 267

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Tue 20/5

6:45 p.m.-3:00 p.m.

2 stops19h 15m

C$ 273

Flights are sorted by cheapest round-trip flights first.

Deals found on 15/4

Showing 1-10 of 13 results
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
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 11 April 2025.

The best time to book flights from St. Louis to Toronto Pearson Intl Airport is 53 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, January is the cheapest month in which you can book a flight from St. Louis to Toronto Pearson Intl Airport (average of C$ 167). Flying from St. Louis to Toronto Pearson Intl Airport in July is currently the most expensive (average of C$ 258). 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 15 April 2025.

One of the essential ways to save on airfare from St. Louis to Toronto Pearson Intl Airport is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight at noon could potentially save you up to 60% on airfare.

Rainfall in Pearson Intl by month

Plan your trip to Pearson Intl by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Toronto Pearson Intl Airport ranges from 51.0 - 83.0 mm per month. June is typically the wettest month, when rainfall can reach 83.0 mm. February is typically the driest time to visit Toronto Pearson Intl Airport when rainfall is around 51.0 mm.

Temperature in Pearson Intl by month

Plan your trip to Pearson Intl by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Toronto Pearson Intl Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 21.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -6.0 C).

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 15 April 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Delta and United Airlines from St. Louis to Toronto to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,876 reviews
Check prices

Comfort

7.9

Overall

8.0

Boarding

8.2

Food

7.1

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Alaska Airlines
8.0
Very good
9,876 reviews
Alaska Airlines
8.0
Very good
9,876 reviews
Check prices

Comfort

7.9

Overall

8.0

Boarding

8.2

Food

7.1

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Delta
8.0
Very good
7,917 reviews
Alaska Airlines
8.0
Very good
9,876 reviews
Check prices

Comfort

7.9

Overall

8.0

Boarding

8.2

Food

7.1

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
United Airlines
7.4
Good
8,658 reviews
Alaska Airlines
8.0
Very good
9,876 reviews
Check prices

Comfort

7.9

Overall

8.0

Boarding

8.2

Food

7.1

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
9,876 reviews
Check prices

Comfort

7.9

Overall

8.0

Boarding

8.2

Food

7.1

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
WestJet
7.2
Good
2,805 reviews
Alaska Airlines
8.0
Very good
9,876 reviews
Check prices

Comfort

7.9

Overall

8.0

Boarding

8.2

Food

7.1

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

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.

  • What are the cheapest airlines flying 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$ 565 on this airline. Additional options worth looking into are Delta and American Airlines, starting at C$ 591 and C$ 605 round-trip. Air Canada is currently priced 15% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from St. Louis to Toronto Pearson Intl Airport one-way?

    For one-way options, check prices for Air Canada. According to our data, you can fly for as low as C$ 267. Users have also found prices from C$ 273 and C$ 284 on Delta and American Airlines, respectively.

  • 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.

  • 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$ 236, our data shows the cheapest flight currently is C$ 193. When looking at the most popular route, (Lambert-St Louis - Toronto Pearson Intl), you can expect to pay C$ 455 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, January is the cheapest month in which you can book a flight from St. Louis to Toronto Pearson Intl Airport (average of C$ 167). Flying from St. Louis to Toronto Pearson Intl Airport in July is currently the most expensive (average of C$ 258). 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
Brampton
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Peterborough
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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 15 April 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 303AverageC$ 756FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

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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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