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Cheap flights from Toronto to St. Louis from C$ 255

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.
YTO — STL
22 Aug — 29 Aug1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Toronto to St. Louis

Enter your travel dates to find the best prices.

Cheapest flights from Toronto to St. Louis
Explore the most affordable flight options available from Toronto to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 23 July 2026.

Mon 17/81:15 p.m.
YYZ
-
STL
1 stop11h 59m
American Airlines
Wed 19/89:32 a.m.
STL
-
YYZ
1 stop7h 58m
American Airlines
Deal found 21/7C$ 475
Thu 27/83:14 p.m.
YYZ
-
STL
1 stop10h 00m
American Airlines
Mon 31/86:00 a.m.
STL
-
YYZ
1 stop7h 33m
American Airlines
Deal found 22/7C$ 486
Tue 18/83:14 p.m.
YYZ
-
STL
1 stop10h 00m
American Airlines
Sat 22/85:00 a.m.
STL
-
YYZ
1 stop8h 33m
American Airlines
Deal found 21/7C$ 490
Sat 22/83:13 p.m.
YYZ
-
STL
1 stop9h 45m
American Airlines
Sat 29/85:00 a.m.
STL
-
YYZ
1 stop8h 33m
American Airlines
Deal found 22/7C$ 499
Sun 6/91:15 p.m.
YYZ
-
STL
1 stop11h 43m
American Airlines
Tue 8/96:00 a.m.
STL
-
YYZ
1 stop7h 33m
American Airlines
Deal found 20/7C$ 514
Fri 11/96:30 a.m.
YYZ
-
STL
1 stop7h 46m
American Airlines
Mon 14/97:21 a.m.
STL
-
YYZ
1 stop10h 14m
American Airlines
Deal found 21/7C$ 527
Tue 29/96:30 a.m.
YYZ
-
STL
1 stop7h 46m
American Airlines
Tue 20/101:06 p.m.
STL
-
YYZ
1 stop9h 38m
American Airlines
Deal found 21/7C$ 557
Thu 29/105:15 p.m.
YYZ
-
STL
1 stop27h 24m
Multiple Airlines
Tue 3/1110:35 a.m.
STL
-
YYZ
2 stops12h 35m
Multiple Airlines
Deal found 23/7C$ 562
Wed 9/96:30 a.m.
YYZ
-
STL
1 stop7h 46m
American Airlines
Tue 6/107:29 a.m.
STL
-
YYZ
1 stop9h 16m
American Airlines
Deal found 22/7C$ 567
Tue 1/911:39 a.m.
YYZ
-
STL
1 stop13h 35m
American Airlines
Tue 8/96:00 a.m.
STL
-
YYZ
1 stop7h 33m
American Airlines
Deal found 19/7C$ 572
Mon 24/81:15 p.m.
YYZ
-
STL
1 stop11h 59m
American Airlines
Thu 27/86:00 a.m.
STL
-
YYZ
1 stop9h 45m
American Airlines
Deal found 22/7C$ 585

Find flight deals from Toronto to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Toronto (YTO) 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 23 July 2026.

Round-trip from

C$ 475

One-way from

C$ 255

Popular in

March

Cheapest in

January

Average price

C$ 662

Good round-trip deal

C$ 658 or less
American Airlines
  • American Airlines
  • 17/8-19/8
  • 2 total stops
  • 19h 57m total
  • Toronto to St. Louis
Search Deals
American Airlines
  • American Airlines
  • 16/9
  • 1 total stop
  • 7h 46m total
  • Toronto to St. Louis
Search Deals
Highest demand for flights based on searches. 19% potential increase in price (C$ 248 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease (C$ 75 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals
Price to beat on a round-trip flight from Toronto (YTO) to Lambert-St Louis.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Toronto 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 23 July 2026.
Use the filters below to find and compare flights from Toronto 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

Tue 15/9

8:50 a.m.-3:38 p.m.

1 stop7h 48m

Lambert-St Louis

Wed 16/9

12:59 p.m.-12:35 p.m.

1 stop22h 36m

C$ 613

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 15/9

6:00 a.m.-9:29 a.m.

1 stop4h 29m

Lambert-St Louis

Wed 16/9

1:55 p.m.-10:59 p.m.

1 stop8h 04m

C$ 726

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Wed 16/9

6:00 a.m.-1:06 p.m.

1 stop8h 06m

Lambert-St Louis

Sun 20/9

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

1 stop4h 00m

C$ 726
Quickest round-trip

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 15/9

12:55 p.m.-2:00 p.m.

Nonstop2h 05m

Lambert-St Louis

Wed 16/9

2:40 p.m.-5:34 p.m.

Nonstop1h 54m

C$ 750

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sun 16/8

7:00 a.m.-10:12 a.m.

1 stop4h 12m

Lambert-St Louis

Tue 18/8

2:40 p.m.-5:37 p.m.

Nonstop1h 57m

C$ 758

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sun 23/8

7:00 a.m.-12:02 p.m.

1 stop6h 02m

Lambert-St Louis

Thu 27/8

2:40 p.m.-5:37 p.m.

Nonstop1h 57m

C$ 767

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 20/8

12:55 p.m.-2:02 p.m.

Nonstop2h 07m

Lambert-St Louis

Sun 23/8

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

Nonstop2h 01m

C$ 865

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 28/7

6:04 a.m.-5:24 p.m.

2 stops12h 20m

Lambert-St Louis

Wed 26/8

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

2 stops11h 41m

C$ 892

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Fri 9/10

10:15 a.m.-3:43 p.m.

1 stop6h 28m

Lambert-St Louis

Sun 11/10

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

Nonstop1h 54m

C$ 917
Cheapest one-way

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Wed 26/8

9:30 a.m.-5:22 p.m.

2 stops32h 52m

C$ 275

Flights are sorted by cheapest round-trip flights first.

Deals found on 20/7

Showing 1-10 of 21 resultsSorted by cheapest first
1
2
3

Best time to book a flight from Toronto to St. Louis

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

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

Currently, January is the cheapest month in which you can book a flight from Toronto to St. Louis (average of C$ 590). Flying from Toronto to St. Louis in April is currently the most expensive (average of C$ 860). 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 YTO to STL?

Find hourly flight availability from Toronto 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 23 July 2026.

Unlike in the evening, when flights are generally more expensive, you can save up to 24% on flights from Toronto to St. Louis by exploring options for tickets at noon.

Weekly flight availability from Toronto to St. Louis

Explore weekly flight availability from Toronto to St. Louis. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 23 July 2026.

The most flights from YTO to STL are scheduled on a Monday (4 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (2 on average).

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

Airfare is below average for this route at the moment.
Toronto to St. Louis flights typically cost between C$ 629 and C$ 707 in August.
The cheapest round-trip price found within the last 5 days was C$ 475 on American Airlines (17 Aug-19 Aug).

What’s the top layover airport for flights from Toronto to St. Louis?

Share of one-stop round-trip flights from Toronto to St. Louis chosen by Cheapflights users in the past 12 months, using the same layover each way.

Chicago (ORD) – chosen by Cheapflights users on 80% of one-stop itineraries from Toronto to St. Louis on Cheapflights.

What’s the cheapest layover airport for flights from Toronto to St. Louis?

Average round-trip fare for 1-stop flights from Toronto to St. Louis, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Chicago (ORD) is the most affordable 1-stop option, with an average round-trip price of C$ 677.

What’s the fastest layover option from Toronto to St. Louis?

Shortest average travel time for 1-stop one-way flights from Toronto to St. Louis, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Detroit (DTW) have the shortest average one-way travel time for 1-stop routes: 4h 19m.

Which airport typically offers the quickest layover for flights from Toronto to St. Louis?

Average layover duration for 1-stop one-way flights from Toronto to St. Louis, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Chicago (ORD) offer the fastest connection on this route, with an average layover time of 1h 02m.

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

Booking 47 days in advance of your planned departure date is, on average, the best time to get cheap flights from Toronto to St. Louis. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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 23 July 2026.
Check out reviews from past customers who have flown with Air Canada from Toronto to St. Louis 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.
Air Canada
7.1
Good
11,371 reviews
Check prices

Food

6.3

Entertainment

6.8

Boarding

7.3

Overall

7.1

Crew

7.8

Comfort

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Nov 2025

YYZ - LAS

It's was great and the crew are very nice, captain has a smooth land on the runway 👍
Air Canada
7.1
Good
11,371 reviews
Air Canada
7.1
Good
11,371 reviews
Check prices

Food

6.3

Entertainment

6.8

Boarding

7.3

Overall

7.1

Crew

7.8

Comfort

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Nov 2025

YYZ - LAS

It's was great and the crew are very nice, captain has a smooth land on the runway 👍

Related info for your journey

Find useful and relevant information for your journey from Toronto 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?

    If you book a flight to St. Louis from Toronto, you will be flying to Lambert-St Louis, which is the city’s only airport. Lambert-St Louis (STL) is located 20.4 km from the centre of St. Louis. There are 3 flights from Toronto to Lambert-St Louis per day from 3 different airlines.

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

    For as low as C$ 750, United Airlines can have you in St. Louis from Toronto in 2h 05m. The distance from Toronto to St. Louis is about 1051 km. This flight may include one or multiple stops.

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

    Flying on Air Canada is currently your cheapest option to St. Louis, with prices starting at C$ 339. Additional round-trip tickets that might be worth considering are offered by United Airlines and American Airlines, with the lowest prices starting at C$ 345 and C$ 372, respectively. Air Canada is currently priced 53% below the average price you’ll pay for this route.

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

    The top 3 most reliable airlines when flying from Toronto to St. Louis are Jazz (84%), Air Canada (83%) and United Airlines (68%).

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

    While on average a flight from Toronto to St. Louis is generally C$ 761, our data shows the cheapest flight currently is C$ 649. When looking at the most popular route, (Toronto Pearson Intl - Lambert-St Louis), you can expect to pay C$ 489 for that flight.

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

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

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

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

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

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

    Currently, January is the cheapest month in which you can book a flight from Toronto to St. Louis (average of C$ 590). Flying from Toronto to St. Louis in April is currently the most expensive (average of C$ 860). 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

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Top 3 airlines flying from Toronto to St. Louis

Discover the top 3 airlines that operate flights from Toronto 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 23 July 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 339AverageC$ 653FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 345AverageC$ 589FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
American AirlinesCheapestC$ 372AverageC$ 699FlexibilityNo cancel feeOn-time71%
Search American Airlines flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Toronto to St. Louis?

Cheapflights makes it easy to find Toronto to St. Louis flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

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

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Toronto to St. Louis for you. Better yet — we are completely free to use.

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

Yes, we can. To see specific flights from Toronto to St. Louis 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 Toronto to St. Louis become cheaper?

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

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