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C$ 257+ Cheap flights to St. Charles

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.
— STL
4 Aug — 11 Aug1
1 adult

Flights to St. Charles in 2025

Find the latest flights to St. Charles in 2025, with up-to-date prices and availability. In the last 7 days, Cheapflights users made a total of 629,999 searches and data was last updated on 30 July 2025.

Round-trip from

C$ 432

One-way from

C$ 240

Popular in

August

Cheapest in

June

Average price

C$ 680
American Airlines
  • American Airlines
  • 11/10-22/10
  • 2 total stops
  • 21h 03m total
  • Toronto to St. Louis
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25/10
  • 25/10
  • 1 total stop
  • 12h 25m total
  • Toronto to St. Charles
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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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Find flight deals to St. Charles

Cheapest flights to St. Charles
Explore the most affordable flight options available to St. Charles. Find the lowest fares based on data from user searches, with prices last updated on 30 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$ 432
Fri 12/92:15 p.m.YYZ - STL
Nonstop2h 03mAir Canada
Sun 14/94:05 p.m.STL - YYZ
Nonstop1h 55mAir Canada
Deal found 29/7C$ 486
Fri 22/86:21 p.m.YYZ - STL
1 stop22h 28mMultiple Airlines
Wed 10/96:10 a.m.STL - YYZ
1 stop10h 33mMultiple Airlines
Deal found 28/7C$ 509
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$ 552
Mon 8/96:04 a.m.YYZ - STL
1 stop11h 45mDelta
Thu 11/96:05 a.m.STL - YYZ
1 stop9h 03mDelta
Deal found 29/7C$ 561

Cheapflights Fare Finder

 
Locate flights to St. Charles that fit your budget, with regularly updated fares and availability. In the last 7 days, Cheapflights users made a total of 629,999 searches and data was last updated on 30 July 2025.
Use the filters below to find and compare flights to St. Charles that are best for you.

Fly from

Toronto

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$ 432

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

4:05 p.m.-7:00 p.m.

Nonstop1h 55m

C$ 486

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Fri 22/8

6:21 p.m.-3:49 p.m.

1 stop22h 28m

Lambert-St Louis

Wed 10/9

6:10 a.m.-5:43 p.m.

1 stop10h 33m

C$ 509

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$ 552

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$ 561

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 30/9

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

1 stop8h 17m

C$ 257

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Fri 17/10

6:29 p.m.-4:04 p.m.

1 stop22h 35m

C$ 268

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Fri 12/9

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

Nonstop2h 03m

C$ 290

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Fri 12/9

4:40 p.m.-10:40 a.m.

1 stop19h 00m

C$ 331

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 19/8

10:20 a.m.-2:43 p.m.

1 stop5h 23m

C$ 332

Flights are sorted by cheapest round-trip flights first.

Deals found on 28/7

Showing 1-10 of 11 results
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Best time to book a flight to St. Charles

Have a flexible travel schedule? Discover the best time to fly to St. Charles 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 to St. Charles

When is the best time to book a flight to St. Charles?

Use this chart to determine the optimal time to book a round-trip flight from Toronto to St. Charles. Price data was last updated on 25 July 2025.

To ensure you get the cheapest price possible for a flight to St. Charles, you should look to book at least 65 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

How long is the flight to St. Charles?

On average, a flight from Toronto to St. Charles takes 2 hours 3 minutes. Flights to St. Charles from other popular cities in Canada will vary in length. Below are a few examples of popular routes and their flight times.

Weekly flight availability to St. Charles

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

What are the most popular airlines that fly to St. Charles?

The most popular airlines flying from Toronto to St. Charles are Air Canada, United Airlines and WestJet.

Air Canada
Air Canada
From C$ 238
United Airlines
United Airlines
From C$ 265
WestJet
WestJet
From C$ 185
Delta
Delta
From C$ 265

What are the cheapest airlines that fly to St. Charles?

The cheapest airlines flying from Toronto to St. Charles are Air Canada, Delta and United Airlines.

Rainfall in St. Charles by month

Plan your trip to St. Charles by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in St. Charles ranges from 56.0 - 119.0 mm per month. May is typically the wettest month, when rainfall can reach 119.0 mm. February is typically the driest time to visit St. Charles when rainfall is around 56.0 mm.

Temperature in St. Charles by month

Plan your trip to St. Charles by taking into account the average temperature totals by month.

If weather is an important factor for your trip to St. Charles, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 27.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 0.0 C).

Reviews of airlines servicing St. Charles

Get insights into the airlines that provide service to St. Charles. 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. Charles. Reviews last updated 30 July 2025.
Read through reviews of airlines serving the United States, such as Delta,United Airlines, andAmerican Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,980 reviews
Check prices

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

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
7,980 reviews
Delta
8.0
Very good
7,980 reviews
Check prices

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

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
8,896 reviews
Delta
8.0
Very good
7,980 reviews
Check prices

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

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
7,980 reviews
Check prices

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

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
2,975 reviews
Delta
8.0
Very good
7,980 reviews
Check prices

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

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
9,837 reviews
Delta
8.0
Very good
7,980 reviews
Check prices

Overall

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

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.

FAQs about flying to St. Charles

  • Can I find cheaper flights to St. Charles if I am willing to have layovers?

    Yes, flights with layovers are often cheaper than direct flights. Keep an eye out for flight deals to St. Charles on Cheapflights that require 1 or 2 stops for potential cost savings.

  • What is the best airline to fly to St. Charles?

    Based on reviews from Cheapflights users, WestJet is rated the highest out of the airlines that fly to St. Charles.

  • How much is a round-trip flight to St. Charles?

    A round-trip flight to St. Charles will typically cost around C$ 148, however they can be found for as little as C$ 80.

  • Where does the fastest flight to St. Charles depart from?

    For those looking to save time traveling to St. Charles, Toronto offers the quickest one-way flight (2 hours 3 minutes).

  • Does Lambert-St Louis have rental cars?

    Yes. Those touching down at Lambert-St Louis can take advantage of the rental car services offered upon their arrival.

  • Are there hotels close to Lambert-St Louis?

    Yes. Lambert-St Louis has hotels nearby for those requiring accommodations. Hampton Inn St. Louis-Airport is the closest property to Lambert-St Louis (0.0 km away from Lambert-St Louis).

See more FAQs

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