Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from St. Louis to Toronto Pearson Intl Airport from C$ 188

STL — YYZ
25 Nov — 2 Dec1
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

Fri 11/1212:02 p.m. -
2 stops24h 38m
Sun 13/126:20 p.m. -
2 stops17h 57m
Deal found 21/10C$ 499
Wed 2/126:13 p.m. -
1 stop18h 27m
Mon 7/122:25 p.m. -
2 stops45h 52m
Deal found 25/10C$ 517
Wed 2/1212:05 p.m. -
2 stops24h 35m
Sun 6/126:30 a.m. -
1 stop18h 42m
Deal found 25/10C$ 532
Wed 9/1212:02 p.m. -
2 stops28h 08m
Wed 16/1211:30 a.m. -
1 stop30h 20m
Deal found 25/10C$ 541
Tue 8/126:02 a.m. -
1 stop7h 40m
Tue 15/121:22 p.m. -
1 stop9h 55m
Deal found 23/10C$ 545
Wed 2/1212:05 p.m. -
2 stops24h 35m
Tue 8/127:15 a.m. -
1 stop17h 57m
Deal found 25/10C$ 550
Mon 7/126:20 p.m. -
1 stop18h 50m
Mon 14/122:25 p.m. -
2 stops45h 52m
Deal found 23/10C$ 555
Wed 2/1212:05 p.m. -
2 stops24h 35m
Sat 5/126:30 a.m. -
1 stop18h 42m
Deal found 25/10C$ 560

Find flight deals from St. Louis to Pearson Intl

Round-trip from

C$ 499

One-way from

C$ 188

Popular in

January

Cheapest in

November

Average price

C$ 866

Good round-trip deal

C$ 1,197 or less
11/12-13/12
  • 11/12-13/12
  • 4 total stops
  • 42h 35m total
  • St. Louis to Toronto
Search Deals
9/12-31/12
  • 9/12-31/12
  • 2 total stops
  • 28h 08m total
  • St. Louis to Toronto
Search Deals
Highest demand for flights based on searches. 0% potential increase in price (C$ 10 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 44 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2026
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

Cheapest round-trip

St. LouisToronto

STL Lambert-St Louis - YYZ Toronto Pearson Intl

STLYYZ

Lambert-St Louis

Wed 25/11

1:14 p.m.-11:59 p.m.

1 stop9h 45m

Toronto Pearson Intl

Wed 31/12

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

Nonstop0h 00m

C$ 231

St. LouisToronto

STL Lambert-St Louis - YYZ Toronto Pearson Intl

STLYYZ

Lambert-St Louis

Wed 9/12

6:20 p.m.-1:40 p.m.

1 stop18h 20m

Toronto Pearson Intl

Wed 31/12

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

Nonstop0h 00m

C$ 273

St. LouisToronto

STL Lambert-St Louis - YYZ Toronto Pearson Intl

STLYYZ

Lambert-St Louis

Fri 20/11

3:04 p.m.-6:51 a.m.

2 stops38h 47m

Toronto Pearson Intl

Wed 31/12

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

Nonstop0h 00m

C$ 354

St. LouisToronto

STL Lambert-St Louis - YYZ Toronto Pearson Intl

STLYYZ

Lambert-St Louis

Wed 4/11

2:00 p.m.-3:20 p.m.

3 stops24h 20m

Toronto Pearson Intl

Wed 31/12

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

Nonstop0h 00m

C$ 364

St. LouisToronto

STL Lambert-St Louis - YYZ Toronto Pearson Intl

STLYYZ

Lambert-St Louis

Fri 25/12

1:20 p.m.-11:52 p.m.

1 stop9h 32m

Toronto Pearson Intl

Wed 31/12

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

Nonstop0h 00m

C$ 371
Quickest round-trip

St. LouisToronto

STL Lambert-St Louis - YYZ Toronto Pearson Intl

STLYYZ

Lambert-St Louis

Wed 4/11

7:26 a.m.-12:32 p.m.

1 stop4h 06m

Toronto Pearson Intl

Wed 31/12

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

Nonstop0h 00m

C$ 427

St. LouisToronto

STL Lambert-St Louis - YYZ Toronto Pearson Intl

STLYYZ

Lambert-St Louis

Sun 8/11

4:26 p.m.-9:52 p.m.

3 stops52h 26m

Toronto Pearson Intl

Wed 31/12

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

Nonstop0h 00m

C$ 458

St. LouisToronto

STL Lambert-St Louis - YYZ Toronto Pearson Intl

STLYYZ

Lambert-St Louis

Fri 25/12

6:21 p.m.-3:20 p.m.

3 stops43h 59m

Toronto Pearson Intl

Wed 31/12

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

Nonstop0h 00m

C$ 490

St. LouisToronto

STL Lambert-St Louis - YYZ Toronto Pearson Intl

STLYYZ

Lambert-St Louis

Mon 2/11

7:59 p.m.-2:50 p.m.

3 stops41h 51m

Toronto Pearson Intl

Wed 31/12

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

Nonstop0h 00m

C$ 510

St. LouisToronto

STL Lambert-St Louis - YYZ Toronto Pearson Intl

STLYYZ

Lambert-St Louis

Tue 8/12

1:00 p.m.-11:41 p.m.

1 stop9h 41m

Toronto Pearson Intl

Tue 15/12

10:00 a.m.-8:32 p.m.

2 stops11h 32m

C$ 664

Flights are sorted by cheapest round-trip flights first.

Deals found on 23/10

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

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, November is the cheapest month in which you can book a flight from St. Louis to Toronto Pearson Intl Airport (average of C$ 671). Flying from St. Louis to Toronto Pearson Intl Airport in January is currently the most expensive (average of C$ 1,190). 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$ 634 and C$ 946 in December.
The cheapest round-trip price found within the last 5 days was C$ 499 on Multiple Airlines (11 Dec-13 Dec).

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
11,815 reviews
Check prices

Boarding

7.3

Entertainment

6.8

Overall

7.1

Comfort

7.1

Crew

7.8

Food

6.3

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
11,815 reviews
Air Canada
7.1
Good
11,815 reviews
Check prices

Boarding

7.3

Entertainment

6.8

Overall

7.1

Comfort

7.1

Crew

7.8

Food

6.3

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?

    Delta can get you from St. Louis to Toronto Pearson Intl Airport in just under 9h 41m. 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$ 332 on this airline. Air Canada is currently priced 60% 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 United Airlines (80%), Air Canada (79%) or Jazz (79%) 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$ 1,200, our data shows the cheapest flight currently is C$ 228. When looking at the most popular route, (Lambert-St Louis - Toronto Pearson Intl), you can expect to pay C$ 541 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, November is the cheapest month in which you can book a flight from St. Louis to Toronto Pearson Intl Airport (average of C$ 671). Flying from St. Louis to Toronto Pearson Intl Airport in January is currently the most expensive (average of C$ 1,190). 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
Muskoka
Guelph
Owen Sound
Pickering
Ajax
Richmond Hill
Milton
Cambridge
Waterloo
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$ 332AverageC$ 802FlexibilityNo 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.

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!

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.