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C$ 210+ 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 29/10. Fares are subject to change and may not be available on all flights or dates of travel.
— STL
15 Oct — 22 Oct1
1 adult
1 adult, Economy

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 15 September 2025.

Round-trip from

C$ 364

One-way from

C$ 210

Popular in

January

Cheapest in

June

Average price

C$ 696
17/10-20/10
  • 17/10-20/10
  • 3 total stops
  • 44h 44m total
  • Toronto to St. Louis
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29/10
  • 29/10
  • 2 total stops
  • 26h 27m total
  • Toronto to St. Charles
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Highest demand for flights based on searches. 7% potential increase in price (C$ 74 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease (C$ 14 potential savings vs. average RT price).
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Average for round-trip flights in September 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 15 September 2025.

Fri 17/108:05 p.m.YYZ - STL
1 stop20h 51mMultiple Airlines
Mon 20/109:59 p.m.STL - YYZ
2 stops23h 53mMultiple Airlines
Deal found 12/9C$ 364
Thu 6/119:45 a.m.YYZ - STL
1 stop29h 12mMultiple Airlines
Mon 10/119:07 p.m.STL - YYZ
1 stop21h 48mMultiple Airlines
Deal found 13/9C$ 393
Thu 30/109:45 a.m.YYZ - STL
1 stop29h 12mMultiple Airlines
Thu 6/116:22 p.m.STL - YYZ
2 stops43h 18mMultiple Airlines
Deal found 14/9C$ 397
Mon 6/109:50 a.m.YYZ - STL
1 stop11h 47mMultiple Airlines
Mon 13/109:59 p.m.STL - YYZ
2 stops38h 39mMultiple Airlines
Deal found 13/9C$ 462
Fri 5/1212:50 p.m.YYZ - STL
1 stop10h 56mMultiple Airlines
Sun 7/129:50 p.m.STL - YYZ
2 stops20h 46mMultiple Airlines
Deal found 14/9C$ 464
Thu 13/117:55 p.m.YYZ - STL
1 stop19h 02mMultiple Airlines
Sun 16/117:45 p.m.STL - YYZ
2 stops15h 01mMultiple Airlines
Deal found 13/9C$ 504
Mon 17/1110:57 a.m.YYZ - STL
1 stop11h 22mAmerican Airlines
Sat 22/117:58 p.m.STL - YYZ
1 stop13h 54mAmerican Airlines
Deal found 14/9C$ 507
Wed 15/103:29 p.m.YYZ - STL
1 stop8h 26mAmerican Airlines
Tue 21/106:00 a.m.STL - YYZ
1 stop9h 34mAmerican Airlines
Deal found 12/9C$ 520

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 15 September 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

Thu 30/10

9:45 a.m.-1:57 p.m.

1 stop29h 12m

Lambert-St Louis

Thu 6/11

6:22 p.m.-2:40 p.m.

2 stops43h 18m

C$ 397

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Fri 17/10

8:05 p.m.-3:56 p.m.

1 stop20h 51m

Lambert-St Louis

Mon 20/10

6:05 p.m.-10:40 p.m.

1 stop27h 35m

C$ 408

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 6/11

9:45 a.m.-9:07 a.m.

2 stops24h 22m

Lambert-St Louis

Mon 10/11

2:12 p.m.-12:11 a.m.

1 stop8h 59m

C$ 436

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Mon 6/10

9:50 a.m.-8:37 p.m.

1 stop11h 47m

Lambert-St Louis

Mon 13/10

9:59 p.m.-1:38 p.m.

2 stops38h 39m

C$ 462

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 13/11

7:55 p.m.-1:57 p.m.

1 stop19h 02m

Lambert-St Louis

Sun 16/11

7:45 p.m.-11:46 a.m.

2 stops15h 01m

C$ 504

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Fri 5/12

10:58 a.m.-9:47 p.m.

1 stop11h 49m

Lambert-St Louis

Sun 7/12

6:00 a.m.-10:56 a.m.

1 stop3h 56m

C$ 547

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Wed 15/10

6:00 a.m.-12:06 p.m.

1 stop7h 06m

Lambert-St Louis

Tue 21/10

6:00 a.m.-4:34 p.m.

1 stop9h 34m

C$ 547

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sat 25/10

3:10 p.m.-10:06 p.m.

1 stop7h 56m

Lambert-St Louis

Sun 2/11

5:00 a.m.-11:32 a.m.

1 stop5h 32m

C$ 552

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Mon 17/11

11:32 a.m.-2:53 p.m.

1 stop4h 21m

Lambert-St Louis

Sat 22/11

7:58 p.m.-10:52 a.m.

1 stop13h 54m

C$ 559

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Wed 29/10

12:30 p.m.-1:57 p.m.

2 stops26h 27m

C$ 210

Flights are sorted by cheapest round-trip flights first.

Deals found on 14/9

Showing 1-10 of 19 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 12 September 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 Monday, which is when the least amount of flights are scheduled (4 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 American Airlines.

Air Canada
Air Canada
From C$ 238
United Airlines
United Airlines
From C$ 232
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 American Airlines, Air Canada and Delta.

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 15 September 2025.
Read through reviews of airlines serving the United States, such as United Airlines,WestJet, andAir Canada. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,931 reviews
Check prices

Comfort

7.3

Overall

7.4

Crew

8.1

Food

6.6

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.
United Airlines
7.4
Good
8,931 reviews
United Airlines
7.4
Good
8,931 reviews
Check prices

Comfort

7.3

Overall

7.4

Crew

8.1

Food

6.6

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.
WestJet
7.2
Good
3,091 reviews
United Airlines
7.4
Good
8,931 reviews
Check prices

Comfort

7.3

Overall

7.4

Crew

8.1

Food

6.6

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.
Air Canada
7.1
Good
10,000 reviews
United Airlines
7.4
Good
8,931 reviews
Check prices

Comfort

7.3

Overall

7.4

Crew

8.1

Food

6.6

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.

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$ 341, however they can be found for as little as C$ 101.

  • 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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