Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from Toronto Pearson Intl Airport to St. Louis from C$ 261

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 16/9. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — STL
3 Sep — 10 Sep1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Toronto Pearson Intl to Lambert-St Louis are usually found in January or February, booked 53 days in advance, depart on a Wednesday or Saturday and return on a Wednesday

Cheap flight deals from Pearson Intl to St. Louis

Enter your travel dates to find the best prices.

Cheapest flights from Pearson Intl to St. Louis
Explore the most affordable flight options available from Pearson Intl to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 4 August 2026.

Sat 17/107:29 a.m. -
1 stop10h 14m
Mon 26/105:00 a.m. -
1 stop8h 33m
Deal found 30/7C$ 439
Tue 8/91:15 p.m. -
1 stop11h 59m
Fri 11/95:00 a.m. -
1 stop8h 32m
Deal found 31/7C$ 465
Sun 8/116:30 a.m. -
1 stop14h 09m
Mon 9/1110:35 a.m. -
2 stops30h 05m
Deal found 31/7C$ 473
Mon 14/96:30 a.m. -
1 stop11h 18m
Mon 21/97:21 a.m. -
1 stop10h 14m
Deal found 31/7C$ 490
Thu 10/911:40 a.m. -
1 stop10h 04m
Mon 14/97:21 a.m. -
1 stop10h 14m
Deal found 3/8C$ 496
Thu 17/99:50 a.m. -
2 stops28h 20m
Thu 24/96:39 p.m. -
1 stop27h 56m
Deal found 3/8C$ 497
Thu 17/93:13 p.m. -
1 stop10h 14m
Thu 24/95:00 a.m. -
1 stop8h 32m
Deal found 3/8C$ 512

Find flight deals from Pearson Intl to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Pearson Intl (YYZ) to St. Louis (STL). 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 4 August 2026.

Round-trip from

C$ 439

One-way from

C$ 261

Popular in

April

Cheapest in

January

Average price

C$ 657

Good round-trip deal

C$ 646 or less
American Airlines
  • American Airlines
  • 17/10-26/10
  • 2 total stops
  • 18h 47m total
  • Toronto to St. Louis
Search Deals
American Airlines
  • American Airlines
  • 16/9
  • 1 total stop
  • 12h 12m total
  • Toronto to St. Louis
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (C$ 133 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (C$ 53 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2026
Search Deals
Price to beat on a round-trip flight from Toronto Pearson Intl to Lambert-St Louis.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Pearson Intl to St. Louis 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 4 August 2026.
Use the filters below to find and compare flights from Toronto Pearson Intl Airport to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 17/9

9:50 a.m.-4:24 p.m.

1 stop7h 34m

Lambert-St Louis

Mon 21/9

2:29 p.m.-4:45 p.m.

2 stops25h 16m

C$ 602

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Fri 6/11

2:10 p.m.-3:26 p.m.

Nonstop2h 16m

Lambert-St Louis

Mon 9/11

4:05 p.m.-7:05 p.m.

Nonstop2h 00m

C$ 672

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 22/9

8:05 a.m.-3:38 p.m.

1 stop8h 33m

Lambert-St Louis

Sat 26/9

8:00 a.m.-5:01 p.m.

1 stop8h 01m

C$ 677

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sat 22/8

5:24 p.m.-10:00 p.m.

1 stop5h 36m

Lambert-St Louis

Sun 23/8

8:55 a.m.-11:56 a.m.

Nonstop2h 01m

C$ 679
Quickest round-trip

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 10/9

7:15 p.m.-8:20 p.m.

Nonstop2h 05m

Lambert-St Louis

Mon 14/9

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

Nonstop1h 54m

C$ 679

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 20/10

8:50 a.m.-12:13 p.m.

1 stop4h 23m

Lambert-St Louis

Fri 23/10

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

Nonstop1h 54m

C$ 685

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 27/8

6:10 a.m.-9:37 a.m.

1 stop4h 27m

Lambert-St Louis

Sun 30/8

6:30 a.m.-11:19 a.m.

1 stop3h 49m

C$ 688

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sun 30/8

5:27 p.m.-10:59 p.m.

1 stop6h 32m

Lambert-St Louis

Sun 6/9

7:25 a.m.-1:42 p.m.

1 stop5h 17m

C$ 688

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sun 4/10

11:00 a.m.-3:43 p.m.

1 stop5h 43m

Lambert-St Louis

Mon 5/10

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

1 stop6h 46m

C$ 688

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sat 22/8

11:00 a.m.-3:31 p.m.

1 stop5h 31m

Lambert-St Louis

Sun 23/8

5:30 p.m.-11:59 p.m.

1 stop5h 29m

C$ 693

Flights are sorted by cheapest round-trip flights first.

Deals found on 30/7

Showing 1-10 of 22 resultsSorted by cheapest first
1
2
3

Best time to book a flight from Pearson Intl to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Pearson Intl 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 Toronto Pearson Intl Airport to St. Louis

How far ahead should I book a flight from Toronto Pearson Intl Airport to St. Louis?

The price you pay for your flight from Toronto Pearson Intl Airport to St. Louis may vary depending on when you book. For the best chance of a lower fare, look to book 52 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, January is the cheapest month in which you can book a flight from Toronto Pearson Intl Airport to St. Louis (average of C$ 592). Flying from Toronto Pearson Intl Airport to St. Louis in April is currently the most expensive (average of C$ 1,124). 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 YYZ to STL?

Find hourly flight availability from Pearson Intl to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 4 August 2026.

When flying from Toronto Pearson Intl Airport to St. Louis, the time of day you fly usually plays a role in the price. Save by searching for a flight at noon, which can drop the price by up to 26% versus a flight in the afternoon.

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

Airfare is below average for this route at the moment.

Toronto Pearson Intl Airport to St. Louis flights typically cost between C$ 591 and C$ 890 in October.
The cheapest round-trip price found within the last 5 days was C$ 439 on American Airlines (17 Oct-26 Oct).

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. 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 St. Louis. Reviews last updated 4 August 2026.
See what other customers who have flown with United Airlines,American Airlines, andAir Canada from Toronto Pearson Intl Airport to St. Louis have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
10,060 reviews
Check prices

Crew

8.1

Entertainment

7.1

Comfort

7.3

Food

6.7

Overall

7.4

Boarding

7.7

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats
United Airlines
7.4
Good
10,060 reviews
United Airlines
7.4
Good
10,060 reviews
Check prices

Crew

8.1

Entertainment

7.1

Comfort

7.3

Food

6.7

Overall

7.4

Boarding

7.7

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats
American Airlines
7.1
Good
11,850 reviews
United Airlines
7.4
Good
10,060 reviews
Check prices

Crew

8.1

Entertainment

7.1

Comfort

7.3

Food

6.7

Overall

7.4

Boarding

7.7

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats
Air Canada
7.1
Good
11,427 reviews
United Airlines
7.4
Good
10,060 reviews
Check prices

Crew

8.1

Entertainment

7.1

Comfort

7.3

Food

6.7

Overall

7.4

Boarding

7.7

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats

Related info for your journey

Find useful and relevant information for your journey from Pearson Intl to St. Louis. 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 into for flights to St. Louis from Toronto Pearson Intl?

    Lambert-St Louis (STL), located 20.4 km from the city centre, is the airport you fly into when you book flights from Toronto Pearson Intl to St. Louis. 3 airlines have flights to Lambert-St Louis from Toronto Pearson Intl on a regular basis. Booking flights from Toronto Pearson Intl to Lambert-St Louis should not be difficult; the airport handles an average of 2 inbound flights from Toronto Pearson Intl per day.

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

    There are many flights that can get you from Toronto Pearson Intl Airport to St. Louis in 2h 16m. Fly via Air Canada or United Airlines to get the fastest option. The distance from Toronto Pearson Intl Airport to St. Louis is about 1051 km. Both multi-stop and direct flights can be found to your destination and back.

  • What are the cheapest airlines flying from Toronto Pearson Intl Airport to St. Louis round-trip?

    Air Canada, at C$ 337, was found to be the cheapest airline from Toronto Pearson Intl Airport to St. Louis.Alternate airlines to your destination round-trip include United Airlines and American Airlines. Air Canada is 52% cheaper than the average price of flights available within the next 90 days to this destination.

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

    No one likes to see their flight delayed. When booking a flight from Toronto Pearson Intl Airport to St. Louis consider choosing Jazz (77%), Air Canada (77%) or United Airlines (65%) as they are the most reliable in getting you off to your destination on time.

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

    While on average a flight from Toronto Pearson Intl Airport to St. Louis is generally C$ 753, our data shows the cheapest flight currently is C$ 630. When looking at the most popular route, (Toronto Pearson Intl - Lambert-St Louis), you can expect to pay C$ 497 for that flight.

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

    Yes. In addition to deals on Pearson Intl to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.

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

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Pearson Intl to St. Louis.

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

    Yes. Cheapflights offers flight deals from Pearson Intl to St. Louis 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 Toronto Pearson Intl Airport to St. Louis?

    Currently, January is the cheapest month in which you can book a flight from Toronto Pearson Intl Airport to St. Louis (average of C$ 592). Flying from Toronto Pearson Intl Airport to St. Louis in April is currently the most expensive (average of C$ 1,124). 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
Chesterfield

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Pearson Intl to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.
Pearson Intl to Kansas City flights
Pearson Intl to Springfield flights
Pearson Intl to Columbia flights
Pearson Intl to Quincy flights

Top 3 airlines flying from Pearson Intl to St. Louis

Discover the top 3 airlines that operate flights from Pearson Intl to St. Louis. 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 4 August 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 337AverageC$ 659FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 343AverageC$ 586FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
American AirlinesCheapestC$ 371AverageC$ 696FlexibilityNo cancel feeOn-time71%
Search American Airlines 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 Pearson Intl to St. Louis?

Cheapflights helps you search for flights from Pearson Intl to St. Louis via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from Pearson Intl to St. Louis?

Millions of users choose and trust Cheapflights to book the best flight deals from Pearson Intl to St. Louis for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Pearson Intl to St. Louis with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Pearson Intl to St. Louis, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from Pearson Intl to St. Louis become cheaper?

Not ready to book yet? You can track prices for flights from Pearson Intl to St. Louis on Cheapflights with our Price Alert feature and get notified when better prices are available.

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.