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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 30/9. Fares are subject to change and may not be available on all flights or dates of travel.
YTO — STL
3 Aug — 10 Aug1
1 adult

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

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 29 July 2025.

Round-trip from

C$ 429

One-way from

C$ 255

Popular in

August

Cheapest in

June

Average price

C$ 676

Good round-trip deal

C$ 532 or less

Good one-way deal

C$ 481 or less
American Airlines
  • American Airlines
  • 11/10-22/10
  • 2 total stops
  • 21h 03m total
  • Toronto to St. Louis
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American Airlines
  • American Airlines
  • 30/9
  • 1 total stop
  • 8h 17m total
  • Toronto to St. Louis
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Highest demand for flights based on searches. 4% potential increase in price (C$ 46 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease (C$ 16 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Price to beat on a round-trip flight from Toronto (YTO) to Lambert-St Louis.
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Price to beat on a one-way flight from Toronto (YTO) to Lambert-St Louis.
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Find flight deals from Toronto to St. Louis

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 29 July 2025.

Sat 11/101:15 p.m.YYZ - STL
1 stop11h 39mAmerican Airlines
Wed 22/107:16 a.m.STL - YYZ
1 stop9h 24mAmerican Airlines
Deal found 27/7C$ 429
Tue 12/86:30 a.m.YYZ - STL
1 stop11h 01mMultiple Airlines
Tue 19/88:00 a.m.STL - YYZ
1 stop14h 47mMultiple Airlines
Deal found 27/7C$ 494
Thu 11/92:15 p.m.YYZ - STL
Nonstop2h 03mAir Canada
Tue 16/99:15 a.m.STL - YYZ
Nonstop1h 56mAir Canada
Deal found 29/7C$ 508
Wed 15/109:00 a.m.YYZ - STL
1 stop7h 44mUnited Airlines
Sun 19/1012:25 p.m.STL - YYZ
1 stop7h 19mUnited Airlines
Deal found 27/7C$ 549
Sun 21/96:03 a.m.YYZ - STL
1 stop11h 45mDelta
Fri 26/95:28 p.m.STL - YYZ
1 stop19h 11mDelta
Deal found 28/7C$ 558

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 29 July 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

Sat 11/10

1:15 p.m.-11:54 p.m.

1 stop11h 39m

Lambert-St Louis

Wed 22/10

7:16 a.m.-5:40 p.m.

1 stop9h 24m

C$ 429

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Fri 12/9

2:15 p.m.-3:18 p.m.

Nonstop2h 03m

Lambert-St Louis

Sun 14/9

1:30 p.m.-9:39 p.m.

1 stop7h 09m

C$ 490

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 12/8

6:30 a.m.-4:31 p.m.

1 stop11h 01m

Lambert-St Louis

Tue 19/8

8:00 a.m.-11:47 p.m.

1 stop14h 47m

C$ 494

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Wed 15/10

9:00 a.m.-3:44 p.m.

1 stop7h 44m

Lambert-St Louis

Sun 19/10

12:25 p.m.-8:44 p.m.

1 stop7h 19m

C$ 549

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Mon 8/9

6:04 a.m.-4:49 p.m.

1 stop11h 45m

Lambert-St Louis

Thu 11/9

6:05 a.m.-4:08 p.m.

1 stop9h 03m

C$ 558

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 30/9

1:15 p.m.-8:32 p.m.

1 stop8h 17m

C$ 255

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Wed 10/9

9:35 a.m.-9:40 a.m.

1 stop25h 05m

C$ 257

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Fri 12/9

2:15 p.m.-3:18 p.m.

Nonstop2h 03m

C$ 288

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 19/8

7:00 a.m.-8:46 p.m.

3 stops14h 46m

C$ 329

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Mon 13/10

8:00 p.m.-10:26 a.m.

2 stops15h 26m

C$ 436

Flights are sorted by cheapest round-trip flights first.

Deals found on 28/7

Showing 1-10 of 11 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 25 July 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, January is the cheapest month in which you can book a flight from Toronto to St. Louis (average of C$ 365). Flying from Toronto to St. Louis in September is currently the most expensive (average of C$ 491). 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 29 July 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 22% on flights from Toronto to St. Louis by exploring options for tickets in the morning.

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 29 July 2025.

The most flights from YTO to STL are scheduled on a Friday (6 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (4 on average).

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

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 29 July 2025.
Check out reviews from past customers who have flown with Delta,United Airlines, andAmerican Airlines 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.
Delta
8.0
Very good
7,977 reviews
Check prices

Food

7.3

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Delta
8.0
Very good
7,977 reviews
Delta
8.0
Very good
7,977 reviews
Check prices

Food

7.3

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
United Airlines
7.4
Good
8,899 reviews
Delta
8.0
Very good
7,977 reviews
Check prices

Food

7.3

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,977 reviews
Check prices

Food

7.3

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
WestJet
7.2
Good
2,973 reviews
Delta
8.0
Very good
7,977 reviews
Check prices

Food

7.3

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Air Canada
7.1
Good
9,822 reviews
Delta
8.0
Very good
7,977 reviews
Check prices

Food

7.3

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.

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 4 flights from Toronto to Lambert-St Louis per day from 4 different airlines.

  • 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$ 429. Additional round-trip tickets that might be worth considering are offered by Air Canada and United Airlines, with the lowest prices starting at C$ 490 and C$ 549, respectively. American Airlines is currently priced 35% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from Toronto to St. Louis one-way?

    For one-way options, check prices for American Airlines. According to our data, you can fly for as low as C$ 255. Users have also found prices from C$ 288 and C$ 329 on Air Canada and United Airlines, respectively.

  • 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 (82%), Air Canada (81%) and United Airlines (72%).

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

    While on average a flight from Toronto to St. Louis is generally C$ 623, our data shows the cheapest flight currently is C$ 300. When looking at the most popular route, (Toronto Pearson Intl - Lambert-St Louis), you can expect to pay C$ 499 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$ 365). Flying from Toronto to St. Louis in September is currently the most expensive (average of C$ 491). 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 4 airlines flying from Toronto to St. Louis

Discover the top 4 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 29 July 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 468AverageC$ 673FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
DeltaCheapestC$ 471AverageC$ 609FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
United AirlinesCheapestC$ 476AverageC$ 671FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
WestJetCheapestC$ 554AverageC$ 863FlexibilityNo 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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