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 11h 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$ 305 on this airline. Air Canada is currently priced 55% below the average price you’ll pay for this route.

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.

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).

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$ 474, our data shows the cheapest flight currently is C$ 245. When looking at the most popular route, (Lambert-St Louis - Toronto Pearson Intl), you can expect to pay C$ 337 for that flight.

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

Consider Air Canada (93%), Jazz (93%) or United Airlines (93%) when booking your flight. These represent the most reliable airlines when flying from St. Louis to Toronto Pearson Intl Airport.

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.

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.

C$ 183+ Flights from St. Louis to Toronto Pearson Intl Airport

Q: 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$ 664 and C$ 1,372 in January. The cheapest round-trip price found within the last 3 days was C$ 337 on Multiple Airlines (14 Jan-17 Jan).

Cheapflights Tip: The best prices from Lambert-St Louis to Toronto Pearson Intl are usually found in January or May, booked 12 days in advance, depart on a Wednesday or Thursday and return on a Thursday

Find 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 28 October 2025.

Mon 15/125:15 a.m.STL - YYZ

1 stop11h 29mAmerican Airlines

Thu 8/11:14 p.m.YYZ - STL

1 stop9h 01mAmerican Airlines

Deal found 27/10C$ 386

Mon 15/1210:47 a.m.STL - YYZ

2 stops36h 24mMultiple Airlines

Thu 8/17:10 a.m.YYZ - STL

1 stop16h 23mMultiple Airlines

Deal found 27/10C$ 413

Wed 10/125:05 a.m.STL - YYZ

1 stop9h 58mAmerican Airlines

Wed 17/126:00 a.m.YYZ - STL

1 stop10h 29mAmerican Airlines

Deal found 27/10C$ 442

Thu 11/122:47 p.m.STL - YYZ

1 stop22h 53mMultiple Airlines

Sun 14/128:20 p.m.YYZ - STL

2 stops14h 32mMultiple Airlines

Deal found 27/10C$ 471

Mon 10/119:50 a.m.STL - YYZ

2 stops10h 17mMultiple Airlines

Sat 22/117:00 a.m.YYZ - STL

1 stop28h 03mMultiple Airlines

Deal found 26/10C$ 474

Thu 27/1110:53 a.m.STL - YYZ

1 stop23h 50mMultiple Airlines

Sun 7/128:30 p.m.YYZ - STL

2 stops14h 22mMultiple Airlines

Deal found 26/10C$ 477

Thu 20/1110:53 a.m.STL - YYZ

1 stop23h 50mMultiple Airlines

Wed 3/125:15 p.m.YYZ - STL

1 stop30h 18mMultiple Airlines

Deal found 26/10C$ 492

Wed 10/127:43 p.m.STL - YYZ

2 stops27h 28mMultiple Airlines

Wed 17/127:10 a.m.YYZ - STL

1 stop16h 23mMultiple Airlines

Deal found 26/10C$ 494

Best flights from St. Louis to Pearson Intl
Discover carefully curated flight deals from St. Louis to Pearson Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 28 October 2025.

Mon 15/125:15 a.m.STL - YYZ

1 stop11h 29mAmerican Airlines

Thu 8/11:14 p.m.YYZ - STL

1 stop9h 01mAmerican Airlines

Deal found 27/10C$ 386

Wed 14/15:06 p.m.STL - YYZ

1 stop20h 14mMultiple Airlines

Sat 17/12:20 p.m.YYZ - STL

2 stops20h 26mMultiple Airlines

Deal found 27/10C$ 414

Tue 3/34:05 p.m.STL - YYZ

Nonstop2h 01mAir Canada

Wed 4/32:00 p.m.YYZ - STL

Nonstop2h 29mAir Canada

Deal found 27/10C$ 639

Sat 14/26:33 p.m.STL - YYZ

1 stop15h 24mAmerican Airlines

Sat 21/211:38 a.m.YYZ - STL

1 stop7h 25mAmerican Airlines

Deal found 26/10C$ 390

Sun 1/25:11 p.m.STL - YYZ

1 stop20h 09mMultiple Airlines

Tue 10/21:30 p.m.YYZ - STL

2 stops28h 19mMultiple Airlines

Deal found 27/10C$ 455

Wed 10/125:05 a.m.STL - YYZ

1 stop9h 58mAmerican Airlines

Wed 17/126:00 a.m.YYZ - STL

1 stop10h 29mAmerican Airlines

Deal found 27/10C$ 442

Thu 19/212:20 p.m.STL - YYZ

1 stop10h 00mMultiple Airlines

Mon 23/28:20 p.m.YYZ - STL

2 stops38h 42mMultiple Airlines

Deal found 27/10C$ 463

Thu 19/26:00 a.m.STL - YYZ

1 stop9h 00mAmerican Airlines

Mon 23/26:29 p.m.YYZ - STL

1 stop15h 59mAmerican Airlines

Deal found 27/10C$ 501

Thu 5/212:20 p.m.STL - YYZ

1 stop10h 00mMultiple Airlines

Sun 8/28:00 p.m.YYZ - STL

2 stops15h 02mMultiple Airlines

Deal found 27/10C$ 508

Fri 12/1210:42 a.m.STL - YYZ

2 stops34h 53mMultiple Airlines

Fri 19/127:10 a.m.YYZ - STL

1 stop12h 03mMultiple Airlines

Deal found 28/10C$ 557

Tue 25/113:14 p.m.STL - YYZ

2 stops31h 41mMultiple Airlines

Tue 2/127:15 a.m.YYZ - STL

1 stop16h 18mMultiple Airlines

Deal found 26/10C$ 583

Direct flights from St. Louis to Pearson Intl
Explore direct flight options from St. Louis to Pearson Intl based on user searches, and compare prices and availability for your desired travel dates. Data last updated 28 October 2025.

Wed 24/124:05 p.m.STL - YYZ

Nonstop2h 01mAir Canada

Fri 26/122:00 p.m.YYZ - STL

Nonstop2h 29mAir Canada

Deal found 27/10C$ 639

Sat 6/124:05 p.m.STL - YYZ

Nonstop2h 01mAir Canada

Sun 7/122:00 p.m.YYZ - STL

Nonstop2h 29mAir Canada

Deal found 28/10C$ 666

Fri 12/124:05 p.m.STL - YYZ

Nonstop2h 01mAir Canada

Fri 19/122:00 p.m.YYZ - STL

Nonstop2h 29mAir Canada

Deal found 28/10C$ 797

Wed 26/114:05 p.m.STL - YYZ

Nonstop2h 01mAir Canada

Tue 2/122:00 p.m.YYZ - STL

Nonstop2h 29mAir Canada

Deal found 27/10C$ 873

Thu 23/44:05 p.m.STL - YYZ

Nonstop1h 57mAir Canada

Sun 26/42:10 p.m.YYZ - STL

Nonstop2h 14mAir Canada

Deal found 28/10C$ 898

Tue 18/114:05 p.m.STL - YYZ

Nonstop2h 01mMultiple Airlines

Wed 19/112:00 p.m.YYZ - STL

Nonstop2h 29mMultiple Airlines

Deal found 28/10C$ 904

Wed 15/44:05 p.m.STL - YYZ

Nonstop1h 57mAir Canada

Thu 30/42:10 p.m.YYZ - STL

Nonstop2h 14mAir Canada

Deal found 28/10C$ 913

Fri 10/44:05 p.m.STL - YYZ

Nonstop1h 57mMultiple Airlines

Wed 15/42:10 p.m.YYZ - STL

Nonstop2h 14mMultiple Airlines

Deal found 28/10C$ 1,004

Mon 17/114:05 p.m.STL - YYZ

Nonstop2h 01mAir Canada

Thu 20/112:00 p.m.YYZ - STL

Nonstop2h 29mAir Canada

Deal found 28/10C$ 1,010

Thu 27/114:05 p.m.STL - YYZ

Nonstop2h 01mAir Canada

Sat 29/112:00 p.m.YYZ - STL

Nonstop2h 29mAir Canada

Deal found 27/10C$ 1,024

Thu 13/114:05 p.m.STL - YYZ

Nonstop2h 01mAir Canada

Fri 14/112:00 p.m.YYZ - STL

Nonstop2h 29mAir Canada

Deal found 28/10C$ 1,256

Sun 23/114:05 p.m.STL - YYZ

Nonstop2h 01mAir Canada

Wed 26/112:00 p.m.YYZ - STL

Nonstop2h 29mAir Canada

Deal found 28/10C$ 1,347

Last-minute flights from St. Louis to Pearson Intl
Discover last-minute flight deals from St. Louis to Pearson Intl. Data last updated 28 October 2025 and is based on user searches.

Fri 7/114:56 p.m.STL - YYZ

2 stops20h 24mMultiple Airlines

Sun 9/119:35 a.m.YYZ - STL

1 stop8h 41mMultiple Airlines

Deal found 26/10C$ 592

Mon 10/119:50 a.m.STL - YYZ

2 stops10h 17mMultiple Airlines

Sat 22/117:00 a.m.YYZ - STL

1 stop28h 03mMultiple Airlines

Deal found 26/10C$ 474

Thu 13/117:02 p.m.STL - YYZ

1 stop18h 38mMultiple Airlines

Sun 16/117:10 a.m.YYZ - STL

1 stop27h 30mMultiple Airlines

Deal found 27/10C$ 536

Thu 20/1110:53 a.m.STL - YYZ

1 stop23h 50mMultiple Airlines

Wed 3/125:15 p.m.YYZ - STL

1 stop30h 18mMultiple Airlines

Deal found 26/10C$ 492

Tue 25/113:14 p.m.STL - YYZ

2 stops31h 41mMultiple Airlines

Tue 2/127:15 a.m.YYZ - STL

1 stop16h 18mMultiple Airlines

Deal found 26/10C$ 583

Wed 26/1110:24 a.m.STL - YYZ

1 stop12h 47mMultiple Airlines

Sun 7/128:30 p.m.YYZ - STL

2 stops14h 22mMultiple Airlines

Deal found 26/10C$ 559

Wed 26/1110:24 a.m.STL - YYZ

1 stop12h 47mMultiple Airlines

Tue 2/127:15 a.m.YYZ - STL

1 stop16h 18mMultiple Airlines

Deal found 27/10C$ 571

Thu 27/1110:53 a.m.STL - YYZ

1 stop23h 50mMultiple Airlines

Sun 7/128:30 p.m.YYZ - STL

2 stops14h 22mMultiple Airlines

Deal found 26/10C$ 477

One-way flights from St. Louis to Pearson Intl
Search for one-way flight options from St. Louis to Pearson Intl. Find affordable one-way fares based on user searches. Data last updated 28 October 2025.

Mon 8/1210:47 a.m.STL - YYZ

2 stops12h 38mMultiple Airlines

Deal found 27/10C$ 183

Wed 10/125:05 a.m.STL - YYZ

1 stop9h 58mAmerican Airlines

Deal found 26/10C$ 189

Wed 10/123:30 p.m.STL - YYZ

1 stop7h 41mMultiple Airlines

Deal found 27/10C$ 193

Thu 4/122:47 p.m.STL - YYZ

1 stop19h 56mMultiple Airlines

Deal found 27/10C$ 194

Fri 5/1210:42 a.m.STL - YYZ

2 stops26h 38mMultiple Airlines

Deal found 27/10C$ 197

Tue 9/123:30 p.m.STL - YYZ

1 stop21h 43mMultiple Airlines

Deal found 27/10C$ 201

Fri 14/119:50 a.m.STL - YYZ

2 stops10h 17mMultiple Airlines

Deal found 26/10C$ 218

Cheap flight deals from St. Louis to Pearson Intl

Round-trip from	C$ 337
One-way from	C$ 183
Popular in	November
Cheapest in	January
Average price	C$ 873
Good round-trip deal	C$ 346 or less

14/1-17/1
2 total stops
36h 41m total
St. Louis to Toronto

Search Deals

8/12
2 total stops
12h 38m total
St. Louis to Toronto

Search Deals

Highest demand for flights based on searches. 14% potential increase in price (C$ 162 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (C$ 26 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in October 2025

Search Deals

Price to beat on a round-trip flight from Lambert-St Louis to Toronto Pearson Intl.

Search Deals

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

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Mon 15/12

5:15 a.m.-5:44 p.m.

1 stop11h 29m

Toronto Pearson Intl

Thu 8/1

1:14 p.m.-9:15 p.m.

1 stop9h 01m

C$ 386

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sat 14/2

6:33 p.m.-10:57 a.m.

1 stop15h 24m

Toronto Pearson Intl

Sat 21/2

11:38 a.m.-6:03 p.m.

1 stop7h 25m

C$ 390

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Wed 14/1

5:06 p.m.-2:20 p.m.

1 stop20h 14m

Toronto Pearson Intl

Sat 17/1

2:20 p.m.-9:46 a.m.

2 stops20h 26m

C$ 414

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Wed 10/12

5:05 a.m.-4:03 p.m.

1 stop9h 58m

Toronto Pearson Intl

Wed 17/12

6:00 a.m.-3:29 p.m.

1 stop10h 29m

C$ 442

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Sun 1/2

5:11 p.m.-2:20 p.m.

1 stop20h 09m

Toronto Pearson Intl

Tue 10/2

1:30 p.m.-4:49 p.m.

2 stops28h 19m

C$ 455

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 19/2

12:20 p.m.-11:20 p.m.

1 stop10h 00m

Toronto Pearson Intl

Mon 23/2

8:20 p.m.-10:02 a.m.

2 stops38h 42m

C$ 463

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 19/2

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

1 stop9h 00m

Toronto Pearson Intl

Mon 23/2

6:29 p.m.-9:28 a.m.

1 stop15h 59m

C$ 501

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Thu 5/2

12:20 p.m.-11:20 p.m.

1 stop10h 00m

Toronto Pearson Intl

Sun 8/2

8:00 p.m.-10:02 a.m.

2 stops15h 02m

C$ 508

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Fri 12/12

10:42 a.m.-10:35 p.m.

2 stops34h 53m

Toronto Pearson Intl

Fri 19/12

7:10 a.m.-6:13 p.m.

1 stop12h 03m

C$ 557

St. LouisToronto

STL - YYZ

STLYYZ

Lambert-St Louis

Tue 25/11

3:14 p.m.-11:55 p.m.

2 stops31h 41m

Toronto Pearson Intl

Tue 2/12

7:15 a.m.-10:33 p.m.

1 stop16h 18m

C$ 583

Flights are sorted by cheapest round-trip flights first.

Deals found on 27/10

Showing 1-10 of 20 results

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?

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$ 250). Flying from St. Louis to Toronto Pearson Intl Airport in February is currently the most expensive (average of C$ 509). 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?

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

10,371 reviews

Check prices

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

10,371 reviews

Air Canada

7.1

Good

10,371 reviews

Check prices

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 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 11h 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$ 305 on this airline. Air Canada is currently priced 55% 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 (93%), Jazz (93%) or United Airlines (93%) 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$ 474, our data shows the cheapest flight currently is C$ 245. When looking at the most popular route, (Lambert-St Louis - Toronto Pearson Intl), you can expect to pay C$ 337 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$ 250). Flying from St. Louis to Toronto Pearson Intl Airport in February is currently the most expensive (average of C$ 509). 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.

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Brantford

Cobourg

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Top airline flying from St. Louis to Pearson Intl

Airline	Cheapest	Average	Flexibility	On-time
Air Canada	CheapestC$ 305	AverageC$ 652	FlexibilityNo cancel fee	On-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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Cheap flights from St. Louis to Toronto Pearson Intl Airport from C$ 183

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 8/12. Fares are subject to change and may not be available on all flights or dates of travel.

Cheapflights Tip: The best prices from Lambert-St Louis to Toronto Pearson Intl are usually found in January or May, booked 12 days in advance, depart on a Wednesday or Thursday and return on a Thursday

Find flight deals from St. Louis to Pearson Intl

Cheapest flights from St. Louis to Pearson IntlExplore 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 28 October 2025.

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 28 October 2025.

Cheap flight deals from St. Louis to Pearson Intl

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

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.

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.

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?

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

What is the cheapest time of day to fly from STL to YYZ?

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

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.

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?

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

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

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

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

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

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

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

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

Travelling to a place near Toronto Pearson Intl Airport?

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.

Top airline flying from St. Louis to Pearson Intl

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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 28 October 2025.