Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from Toronto to St. Louis from C$ 259

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 30/3. Fares are subject to change and may not be available on all flights or dates of travel.
YTO — STL
9 Apr — 16 Apr1
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 10 March 2026.

Tue 24/37:15 a.m.
YYZ
-
STL
1 stop17h 04m
Multiple Airlines
Tue 31/311:27 a.m.
STL
-
YYZ
2 stops23h 08m
Multiple Airlines
Deal found 5/3C$ 474
Tue 21/43:13 p.m.
YYZ
-
STL
1 stop8h 06m
American Airlines
Sat 25/48:57 a.m.
STL
-
YYZ
1 stop7h 46m
American Airlines
Deal found 5/3C$ 475
Wed 27/57:20 a.m.
YYZ
-
STL
1 stop10h 10m
American Airlines
Wed 10/62:36 p.m.
STL
-
YYZ
1 stop7h 53m
American Airlines
Deal found 10/3C$ 484
Mon 23/38:20 p.m.
YYZ
-
STL
1 stop27h 59m
Multiple Airlines
Thu 2/49:50 a.m.
STL
-
YYZ
2 stops10h 19m
Multiple Airlines
Deal found 5/3C$ 499
Wed 25/38:20 p.m.
YYZ
-
STL
1 stop11h 57m
Multiple Airlines
Tue 31/311:27 a.m.
STL
-
YYZ
2 stops23h 08m
Multiple Airlines
Deal found 5/3C$ 501
Tue 24/37:15 a.m.
YYZ
-
STL
1 stop17h 04m
Multiple Airlines
Thu 2/49:50 a.m.
STL
-
YYZ
2 stops10h 19m
Multiple Airlines
Deal found 5/3C$ 502
Tue 24/35:15 p.m.
YYZ
-
STL
2 stops42h 16m
Multiple Airlines
Mon 30/37:47 a.m.
STL
-
YYZ
1 stop15h 27m
Multiple Airlines
Deal found 5/3C$ 509
Wed 25/33:40 p.m.
YYZ
-
STL
2 stops19h 51m
Multiple Airlines
Mon 30/37:47 a.m.
STL
-
YYZ
1 stop15h 27m
Multiple Airlines
Deal found 5/3C$ 520
Tue 24/37:15 a.m.
YYZ
-
STL
1 stop17h 04m
Multiple Airlines
Wed 1/48:16 p.m.
STL
-
YYZ
2 stops17h 04m
Multiple Airlines
Deal found 5/3C$ 524
Tue 24/37:15 a.m.
YYZ
-
STL
1 stop17h 04m
Multiple Airlines
Sun 29/34:51 p.m.
STL
-
YYZ
1 stop20h 17m
Multiple Airlines
Deal found 5/3C$ 528
Wed 25/38:20 p.m.
YYZ
-
STL
1 stop11h 57m
Multiple Airlines
Fri 3/49:50 a.m.
STL
-
YYZ
2 stops10h 19m
Multiple Airlines
Deal found 5/3C$ 529

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 10 March 2026.

Round-trip from

C$ 474

One-way from

C$ 259

Popular in

September

Cheapest in

June

Average price

C$ 687

Good round-trip deal

C$ 500 or less
24/3-31/3
  • 24/3-31/3
  • 3 total stops
  • 40h 12m total
  • Toronto to St. Louis
Search Deals
30/3
  • 30/3
  • 2 total stops
  • 28h 22m total
  • Toronto to St. Louis
Search Deals
Highest demand for flights based on searches. 2% potential increase in price (C$ 18 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 18 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 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 10 March 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

Wed 1/4

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

1 stop8h 00m

Lambert-St Louis

Tue 14/4

2:33 p.m.-11:29 p.m.

1 stop7h 56m

C$ 548

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 26/3

8:45 a.m.-2:42 p.m.

1 stop6h 57m

Lambert-St Louis

Thu 2/4

7:45 a.m.-1:42 p.m.

1 stop4h 57m

C$ 588

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Fri 20/3

10:05 a.m.-4:32 p.m.

1 stop7h 27m

Lambert-St Louis

Mon 30/3

6:10 a.m.-4:14 p.m.

1 stop9h 04m

C$ 588

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 21/4

5:20 p.m.-9:13 p.m.

1 stop4h 53m

Lambert-St Louis

Sat 25/4

9:16 a.m.-7:02 p.m.

2 stops8h 46m

C$ 588
Quickest round-trip

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 9/4

6:20 a.m.-9:46 a.m.

1 stop4h 26m

Lambert-St Louis

Mon 13/4

10:50 a.m.-3:20 p.m.

1 stop3h 30m

C$ 588

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Wed 25/3

8:45 a.m.-2:42 p.m.

1 stop6h 57m

Lambert-St Louis

Thu 2/4

6:30 a.m.-11:49 a.m.

1 stop4h 19m

C$ 588

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Fri 17/4

3:13 p.m.-10:17 p.m.

1 stop8h 04m

Lambert-St Louis

Mon 20/4

2:33 p.m.-11:29 p.m.

1 stop7h 56m

C$ 596

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 26/3

8:45 a.m.-10:59 p.m.

1 stop15h 14m

Lambert-St Louis

Fri 27/3

7:00 p.m.-9:58 a.m.

1 stop13h 58m

C$ 635

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 4/6

2:00 p.m.-8:25 p.m.

1 stop7h 25m

Lambert-St Louis

Mon 8/6

7:05 a.m.-9:56 a.m.

Nonstop1h 51m

C$ 639

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 14/4

11:00 a.m.-9:52 p.m.

1 stop11h 52m

Lambert-St Louis

Wed 15/4

7:45 a.m.-4:43 p.m.

1 stop7h 58m

C$ 643

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/3

Showing 1-10 of 18 resultsSorted by cheapest first
1
2

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, December is the cheapest month in which you can book a flight from Toronto to St. Louis (average of C$ 335). Flying from Toronto to St. Louis in April is currently the most expensive (average of C$ 502). 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 10 March 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Toronto to St. Louis as you normally would.

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 10 March 2026.

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

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 62% 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.

Minneapolis (MSP) is the most affordable 1-stop option, with an average round-trip price of C$ 638.

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: 3h 47m.

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 Detroit (DTW) offer the fastest connection on this route, with an average layover time of 0h 57m.

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 10 March 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
10,800 reviews
Check prices

Comfort

7.1

Overall

7.1

Boarding

7.3

Food

6.3

Crew

7.8

Entertainment

6.8

Reviews

1 / 20
2.0
Mediocre

Sugith,Jan 2026

YYZ - YSB

8 am flight cancelled at 2 am. Rebooked next day. Had to pay to rebook myself on Porter to leave same day.
Air Canada
7.1
Good
10,800 reviews
Air Canada
7.1
Good
10,800 reviews
Check prices

Comfort

7.1

Overall

7.1

Boarding

7.3

Food

6.3

Crew

7.8

Entertainment

6.8

Reviews

1 / 20
2.0
Mediocre

Sugith,Jan 2026

YYZ - YSB

8 am flight cancelled at 2 am. Rebooked next day. Had to pay to rebook myself on Porter to leave same day.

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 2 flights from Toronto to Lambert-St Louis per day from 5 different airlines.

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

    For as low as C$ 588, American Airlines can have you in St. Louis from Toronto in 6h 57m. 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 United Airlines is currently your cheapest option to St. Louis, with prices starting at C$ 327. Additional round-trip tickets that might be worth considering are offered by American Airlines and Air Canada, with the lowest prices starting at C$ 358 and C$ 451, respectively. United Airlines is currently priced 47% 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 United Airlines (75%), Air Canada (38%) and Jazz (38%).

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

    While on average a flight from Toronto to St. Louis is generally C$ 677, our data shows the cheapest flight currently is C$ 369. When looking at the most popular route, (Toronto Pearson Intl - Lambert-St Louis), you can expect to pay C$ 583 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, December is the cheapest month in which you can book a flight from Toronto to St. Louis (average of C$ 335). Flying from Toronto to St. Louis in April is currently the most expensive (average of C$ 502). 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.

Top 5 airlines flying from Toronto to St. Louis

Discover the top 5 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 10 March 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapestC$ 327AverageC$ 567FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
American AirlinesCheapestC$ 358AverageC$ 673FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Air CanadaCheapestC$ 451AverageC$ 582FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
DeltaCheapestC$ 466AverageC$ 635FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
WestJetCheapestC$ 548AverageC$ 968FlexibilityNo cancel feeOn-time60%
Search WestJet 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 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.

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.