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C$ 186+ 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 15/1. Fares are subject to change and may not be available on all flights or dates of travel.
— STL
14 Jan — 21 Jan1
1 adult
1 adult, Economy, 0 bags

Flights to St. Charles in 2025

Enter your travel dates to find the best prices.

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 December 2025.

Tue 30/125:30 p.m.YYZ - STL
1 stop6h 13mUnited Airlines
Sat 3/16:35 p.m.STL - YYZ
1 stop4h 24mUnited Airlines
Deal found 14/12C$ 684
Tue 30/126:45 p.m.YYZ - STL
1 stop4h 58mAir Canada
Sat 3/16:35 p.m.STL - YYZ
1 stop4h 24mAir Canada
Deal found 14/12C$ 748
Sun 28/1212:05 p.m.YYZ - STL
1 stop6h 49mUnited Airlines
Sat 3/16:35 p.m.STL - YYZ
1 stop4h 24mUnited Airlines
Deal found 15/12C$ 783
Wed 24/129:00 a.m.YYZ - STL
1 stop9h 54mUnited Airlines
Mon 29/126:35 p.m.STL - YYZ
1 stop4h 24mUnited Airlines
Deal found 13/12C$ 821
Sat 20/1210:00 a.m.YYZ - STL
2 stops13h 43mUnited Airlines
Sat 3/13:10 p.m.STL - YYZ
1 stop7h 09mUnited Airlines
Deal found 13/12C$ 847
Sun 28/122:00 p.m.YYZ - STL
Nonstop2h 29mAir Canada
Sat 3/16:35 p.m.STL - YYZ
1 stop4h 24mAir Canada
Deal found 15/12C$ 913
Thu 25/122:00 p.m.YYZ - STL
Nonstop2h 29mAir Canada
Mon 29/126:35 p.m.STL - YYZ
1 stop4h 24mAir Canada
Deal found 13/12C$ 949
Wed 24/122:00 p.m.YYZ - STL
Nonstop2h 29mAir Canada
Mon 29/126:35 p.m.STL - YYZ
1 stop4h 24mAir Canada
Deal found 14/12C$ 1,035

Find flight deals to St. Charles

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 December 2025.

Round-trip from

C$ 296

One-way from

C$ 186

Popular in

September

Cheapest in

June

Average price

C$ 713
15/1-18/1
  • 15/1-18/1
  • 2 total stops
  • 36h 33m total
  • Toronto to St. Louis
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15/1
  • 15/1
  • 1 total stop
  • 16h 24m total
  • Toronto to St. Charles
Search Deals
Highest demand for flights based on searches. 2% potential increase in price.
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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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 December 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

Sun 11/1

7:10 a.m.-8:05 a.m.

1 stop25h 55m

Lambert-St Louis

Sat 17/1

3:43 p.m.-6:20 a.m.

2 stops37h 37m

C$ 380

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 6/1

7:15 a.m.-10:33 p.m.

1 stop16h 18m

Lambert-St Louis

Fri 9/1

5:11 p.m.-2:20 p.m.

1 stop20h 09m

C$ 414

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sun 11/1

7:10 a.m.-8:05 a.m.

1 stop25h 55m

Lambert-St Louis

Thu 5/2

10:01 p.m.-7:36 p.m.

2 stops20h 35m

C$ 423

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Mon 5/1

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

1 stop30h 18m

Lambert-St Louis

Sat 10/1

7:43 p.m.-2:05 p.m.

2 stops17h 22m

C$ 456

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 24/2

6:00 a.m.-1:54 p.m.

1 stop8h 54m

Lambert-St Louis

Sat 28/2

1:33 p.m.-10:55 p.m.

1 stop8h 22m

C$ 518

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 24/2

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

Nonstop2h 29m

Lambert-St Louis

Sat 28/2

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

Nonstop2h 01m

C$ 540

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 15/1

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

Nonstop2h 29m

Lambert-St Louis

Sun 18/1

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

Nonstop2h 01m

C$ 540

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 12/2

10:51 a.m.-9:05 p.m.

1 stop11h 14m

Lambert-St Louis

Thu 26/2

7:41 a.m.-5:49 p.m.

2 stops9h 08m

C$ 547

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 8/1

11:00 a.m.-2:30 p.m.

1 stop4h 30m

Lambert-St Louis

Mon 12/1

8:30 a.m.-2:14 p.m.

1 stop4h 44m

C$ 547

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 15/1

7:10 a.m.-10:34 p.m.

1 stop16h 24m

C$ 186

Flights are sorted by cheapest round-trip flights first.

Deals found on 14/12

Showing 1-10 of 18 results
1
2

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

How long is the flight to St. Charles?

On average, a flight from Toronto to St. Charles takes 2 hours 6 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.

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$ 328
United Airlines
United Airlines
From C$ 412
WestJet
WestJet
From C$ 461
Delta
Delta
From C$ 473

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

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

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 December 2025.
Read through reviews of airlines serving the United States, such as United Airlines and Air Canada. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,092 reviews
Check prices

Overall

7.4

Crew

8.1

Food

6.6

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

AMS - EWR

It was good! The first 3/4 of the trip was uncomfortably cold. Only one option for lunch that I didn’t enjoy (vegetarian).
United Airlines
7.4
Good
9,092 reviews
United Airlines
7.4
Good
9,092 reviews
Check prices

Overall

7.4

Crew

8.1

Food

6.6

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

AMS - EWR

It was good! The first 3/4 of the trip was uncomfortably cold. Only one option for lunch that I didn’t enjoy (vegetarian).
Air Canada
7.1
Good
10,525 reviews
United Airlines
7.4
Good
9,092 reviews
Check prices

Overall

7.4

Crew

8.1

Food

6.6

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

AMS - EWR

It was good! The first 3/4 of the trip was uncomfortably cold. Only one option for lunch that I didn’t enjoy (vegetarian).

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, Air Canada 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$ 304.

  • 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 6 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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