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Cheap flights from Toronto to St. Louis from C$ 200

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 26/2. Fares are subject to change and may not be available on all flights or dates of travel.
YTO — STL
26 Nov — 3 Dec1
1 adult
1 adult, Economy, 0 bags

Cheapflights Tip: The best prices from Toronto to Lambert-St Louis are usually found in June or August, booked 65 days in advance, depart on a Thursday or Tuesday and return on a Wednesday

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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 27 October 2025.

Wed 10/126:00 a.m.YYZ - STL
1 stop11h 50mAmerican Airlines
Mon 22/128:01 p.m.STL - YYZ
1 stop13h 55mAmerican Airlines
Deal found 26/10C$ 411
Sat 6/126:00 a.m.YYZ - STL
1 stop8h 29mAmerican Airlines
Tue 9/125:15 a.m.STL - YYZ
1 stop9h 48mAmerican Airlines
Deal found 25/10C$ 453
Wed 10/125:15 p.m.YYZ - STL
1 stop30h 18mMultiple Airlines
Wed 17/123:30 p.m.STL - YYZ
1 stop21h 50mMultiple Airlines
Deal found 26/10C$ 458
Fri 5/1210:55 a.m.YYZ - STL
1 stop12h 38mMultiple Airlines
Wed 10/123:30 p.m.STL - YYZ
1 stop7h 41mMultiple Airlines
Deal found 25/10C$ 463
Thu 4/128:30 p.m.YYZ - STL
2 stops14h 17mMultiple Airlines
Wed 10/123:30 p.m.STL - YYZ
1 stop7h 41mMultiple Airlines
Deal found 25/10C$ 474
Wed 10/126:00 a.m.YYZ - STL
1 stop11h 50mAmerican Airlines
Sun 21/126:00 a.m.STL - YYZ
1 stop4h 45mAmerican Airlines
Deal found 26/10C$ 476
Fri 5/1210:55 a.m.YYZ - STL
1 stop12h 38mMultiple Airlines
Mon 8/123:30 p.m.STL - YYZ
1 stop7h 55mMultiple Airlines
Deal found 25/10C$ 477
Fri 26/121:14 p.m.YYZ - STL
1 stop11h 41mAmerican Airlines
Thu 8/16:00 a.m.STL - YYZ
1 stop9h 03mAmerican Airlines
Deal found 27/10C$ 488
Fri 5/1210:55 a.m.YYZ - STL
1 stop12h 38mMultiple Airlines
Thu 11/123:30 p.m.STL - YYZ
1 stop7h 41mMultiple Airlines
Deal found 25/10C$ 494
Sat 6/122:00 p.m.YYZ - STL
Nonstop2h 29mAir Canada
Tue 9/124:05 p.m.STL - YYZ
Nonstop2h 01mAir Canada
Deal found 25/10C$ 497
Tue 9/127:15 a.m.YYZ - STL
1 stop16h 18mMultiple Airlines
Fri 12/129:54 a.m.STL - YYZ
1 stop9h 06mMultiple Airlines
Deal found 25/10C$ 500

Cheap 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 27 October 2025.

Round-trip from

C$ 368

One-way from

C$ 200

Popular in

September

Cheapest in

June

Average price

C$ 651

Good round-trip deal

C$ 593 or less
16/1-19/1
  • 16/1-19/1
  • 2 total stops
  • 30h 53m total
  • Toronto to St. Louis
Search Deals
26/2
  • 26/2
  • 1 total stop
  • 16h 23m total
  • Toronto to St. Louis
Search Deals
High demand for flights, 2% potential price rise
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 14 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 Toronto (YTO) to Lambert-St Louis.
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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 27 October 2025.
Use the filters below to find and compare flights from Toronto to St. Louis that are best for you.

Fly from

Toronto

Fly to

St. Louis

Route

Depart

Return

Price

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Fri 16/1

7:10 a.m.-10:37 p.m.

1 stop16h 27m

Lambert-St Louis

Mon 19/1

8:45 a.m.-12:11 a.m.

1 stop14h 26m

C$ 368

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Wed 10/12

5:15 p.m.-10:33 p.m.

1 stop30h 18m

Lambert-St Louis

Wed 17/12

7:43 p.m.-2:20 p.m.

2 stops17h 37m

C$ 460

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 11/12

6:00 a.m.-4:19 p.m.

1 stop11h 19m

Lambert-St Louis

Thu 18/12

6:00 a.m.-11:45 a.m.

1 stop4h 45m

C$ 476

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Wed 3/12

9:00 a.m.-12:15 p.m.

1 stop4h 15m

Lambert-St Louis

Wed 3/12

4:05 p.m.-7:06 p.m.

Nonstop2h 01m

C$ 521

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 11/11

12:45 p.m.-11:42 p.m.

1 stop11h 57m

Lambert-St Louis

Tue 18/11

4:05 p.m.-7:06 p.m.

Nonstop2h 01m

C$ 529

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 3/3

2:00 p.m.-3:29 p.m.

Nonstop2h 29m

Lambert-St Louis

Wed 4/3

4:05 p.m.-7:06 p.m.

Nonstop2h 01m

C$ 530

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 25/11

2:00 p.m.-3:29 p.m.

Nonstop2h 29m

Lambert-St Louis

Fri 28/11

4:05 p.m.-7:06 p.m.

Nonstop2h 01m

C$ 530

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 26/2

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

1 stop16h 23m

C$ 200

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Fri 21/11

7:00 a.m.-8:57 a.m.

1 stop26h 57m

C$ 235

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Mon 8/12

12:50 p.m.-10:33 p.m.

1 stop10h 43m

C$ 250

Flights are sorted by cheapest round-trip flights first.

Deals found on 27/10

Showing 1-10 of 16 results
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

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

Use this chart to determine the optimal time to book a round-trip flight from Toronto to St. Louis. Price data was last updated on 24 October 2025.

Booking 65 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.

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

Currently, October is the cheapest month in which you can book a flight from Toronto to St. Louis (average of C$ 420). Flying from Toronto to St. Louis in January is currently the most expensive (average of C$ 610). 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 27 October 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 32% on flights from Toronto to St. Louis by exploring options for tickets in the afternoon.

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 27 October 2025.

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).

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

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 60% 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$ 658.

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 27 October 2025.
Check out reviews from past customers who have flown with United Airlines and 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.
United Airlines
7.4
Good
8,997 reviews
Check prices

Entertainment

7.1

Food

6.6

Comfort

7.3

Boarding

7.7

Overall

7.4

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
United Airlines
7.4
Good
8,997 reviews
United Airlines
7.4
Good
8,997 reviews
Check prices

Entertainment

7.1

Food

6.6

Comfort

7.3

Boarding

7.7

Overall

7.4

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
Air Canada
7.1
Good
10,370 reviews
United Airlines
7.4
Good
8,997 reviews
Check prices

Entertainment

7.1

Food

6.6

Comfort

7.3

Boarding

7.7

Overall

7.4

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000

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$ 476, American Airlines can have you in St. Louis from Toronto in 11h 19m. The distance from Toronto to St. Louis is about 1051 km.

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

    Flying on American Airlines is currently your cheapest option to St. Louis, with prices starting at C$ 436. Additional round-trip tickets that might be worth considering are offered by United Airlines and Air Canada, with the lowest prices starting at C$ 471 and C$ 476, respectively. American Airlines is currently priced 35% 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 Air Canada (82%), Jazz (82%) and United Airlines (82%).

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

    While on average a flight from Toronto to St. Louis is generally C$ 601, our data shows the cheapest flight currently is C$ 503. When looking at the most popular route, (Toronto Pearson Intl - Lambert-St Louis), you can expect to pay C$ 383 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, October is the cheapest month in which you can book a flight from Toronto to St. Louis (average of C$ 420). Flying from Toronto to St. Louis in January is currently the most expensive (average of C$ 610). 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
St. Peters

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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 27 October 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapestC$ 436AverageC$ 694FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
United AirlinesCheapestC$ 471AverageC$ 687FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 476AverageC$ 674FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
DeltaCheapestC$ 481AverageC$ 663FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
WestJetCheapestC$ 565AverageC$ 892FlexibilityNo cancel feeOn-time60%
Search WestJet 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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