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C$ 270+ 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 23/4. Fares are subject to change and may not be available on all flights or dates of travel.
— STL
15 Apr — 22 Apr1
1 adult
1 adult, Economy, 0 bags

Flights to St. Charles in 2026

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 16 March 2026.

Wed 15/411:33 a.m.
YYZ
-
STL
1 stop11h 44m
American Airlines
Wed 29/412:27 p.m.
STL
-
YYZ
1 stop10h 02m
American Airlines
Deal found 10/3C$ 513
Mon 6/46:00 a.m.
YYZ
-
STL
1 stop8h 43m
American Airlines
Wed 8/45:51 a.m.
STL
-
YYZ
1 stop7h 42m
American Airlines
Deal found 11/3C$ 549
Mon 13/47:10 a.m.
YYZ
-
STL
1 stop17h 15m
Multiple Airlines
Mon 20/48:23 p.m.
STL
-
YYZ
2 stops16h 42m
Multiple Airlines
Deal found 13/3C$ 550
Wed 25/37:10 a.m.
YYZ
-
STL
1 stop17h 09m
Multiple Airlines
Fri 27/34:51 p.m.
STL
-
YYZ
1 stop20h 29m
Multiple Airlines
Deal found 10/3C$ 553
Tue 7/47:10 a.m.
YYZ
-
STL
1 stop17h 15m
Multiple Airlines
Thu 16/49:55 p.m.
STL
-
YYZ
2 stops20h 41m
Multiple Airlines
Deal found 13/3C$ 554
Mon 20/411:33 a.m.
YYZ
-
STL
1 stop13h 13m
American Airlines
Wed 22/412:27 p.m.
STL
-
YYZ
1 stop10h 02m
American Airlines
Deal found 11/3C$ 556
Sat 25/46:15 a.m.
YYZ
-
STL
1 stop10h 45m
American Airlines
Mon 27/45:51 a.m.
STL
-
YYZ
1 stop10h 52m
American Airlines
Deal found 11/3C$ 569
Thu 26/37:10 a.m.
YYZ
-
STL
1 stop17h 09m
Multiple Airlines
Fri 27/34:51 p.m.
STL
-
YYZ
1 stop20h 29m
Multiple Airlines
Deal found 10/3C$ 571
Wed 15/47:10 a.m.
YYZ
-
STL
1 stop17h 09m
Multiple Airlines
Wed 29/48:23 p.m.
STL
-
YYZ
2 stops38h 12m
Multiple Airlines
Deal found 10/3C$ 572
Wed 25/37:10 a.m.
YYZ
-
STL
1 stop17h 09m
Multiple Airlines
Thu 26/34:51 p.m.
STL
-
YYZ
1 stop20h 25m
Multiple Airlines
Deal found 10/3C$ 573
Thu 9/47:10 a.m.
YYZ
-
STL
1 stop17h 15m
Multiple Airlines
Thu 16/49:55 p.m.
STL
-
YYZ
2 stops20h 41m
Multiple Airlines
Deal found 12/3C$ 576
Thu 4/67:20 a.m.
YYZ
-
STL
1 stop7h 46m
American Airlines
Mon 8/61:45 p.m.
STL
-
YYZ
1 stop8h 44m
American Airlines
Deal found 11/3C$ 578

Find flight deals to St. Charles

Find the latest flights to St. Charles in 2026, 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 16 March 2026.

Round-trip from

C$ 513

One-way from

C$ 270

Popular in

March

Cheapest in

June

Average price

C$ 1,269
American Airlines
  • American Airlines
  • 27/5-10/6
  • 2 total stops
  • 18h 03m total
  • Toronto to St. Louis
Search Deals
23/4
  • 23/4
  • 2 total stops
  • 35h 50m total
  • Toronto to St. Charles
Search Deals
Highest demand for flights based on searches. 20% potential increase in price (C$ 171 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 8% potential price decrease (C$ 55 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

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 16 March 2026.
Use the filters below to find and compare flights to St. Charles that are best for you.

Fly from

Route

Depart

Return

Price

Cheapest round-trip

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 14/4

10:15 a.m.-9:13 p.m.

1 stop11h 58m

Lambert-St Louis

Wed 15/4

6:30 a.m.-6:58 p.m.

1 stop11h 28m

C$ 620

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 4/6

7:20 a.m.-2:06 p.m.

1 stop7h 46m

Lambert-St Louis

Mon 8/6

9:23 a.m.-6:45 p.m.

1 stop8h 22m

C$ 639
Quickest round-trip

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Wed 15/4

2:10 p.m.-3:25 p.m.

Nonstop2h 15m

Lambert-St Louis

Wed 29/4

9:10 a.m.-5:56 p.m.

1 stop7h 46m

C$ 665

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 14/5

7:30 a.m.-4:39 p.m.

2 stops10h 09m

Lambert-St Louis

Sat 20/6

5:41 p.m.-11:59 p.m.

1 stop5h 18m

C$ 672

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 4/6

7:30 a.m.-3:46 p.m.

2 stops9h 16m

Lambert-St Louis

Mon 8/6

9:23 a.m.-5:56 p.m.

1 stop7h 33m

C$ 687

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 16/6

7:30 a.m.-3:46 p.m.

2 stops9h 16m

Lambert-St Louis

Fri 19/6

9:23 a.m.-5:56 p.m.

1 stop7h 33m

C$ 687

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sun 26/4

2:10 p.m.-3:25 p.m.

Nonstop2h 15m

Lambert-St Louis

Wed 29/4

9:10 a.m.-5:56 p.m.

1 stop7h 46m

C$ 737
Cheapest one-way

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Mon 13/7

4:45 p.m.-6:36 p.m.

2 stops26h 51m

C$ 337

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 14/4

1:15 p.m.-10:19 p.m.

1 stop10h 04m

C$ 340

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 28/4

10:50 a.m.-11:19 p.m.

3 stops37h 29m

C$ 353

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/3

Showing 1-10 of 16 resultsSorted by cheapest first
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.

Weekly flight availability to St. Charles

The most flights from Toronto to St. Charles 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).

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$ 211
United Airlines
United Airlines
From C$ 330
WestJet
WestJet
From C$ 554
American Airlines
American Airlines
From C$ 273

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

The cheapest airlines flying from Toronto to St. Charles are United Airlines, American 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 16 March 2026.
Read through reviews of airlines serving the United States, such as Air Canada. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Air Canada
7.1
Good
10,805 reviews
Check prices

Crew

7.8

Entertainment

6.8

Boarding

7.3

Comfort

7.1

Food

6.3

Overall

7.1

Reviews

1 / 20
2.0
Mediocre

Sugith,Jan 2026

YYZ - YSB

8 am flight cancelled at 2 am. Rebooked next day. Had to pay to rebook myself on Porter to leave same day.
Air Canada
7.1
Good
10,805 reviews
Air Canada
7.1
Good
10,805 reviews
Check prices

Crew

7.8

Entertainment

6.8

Boarding

7.3

Comfort

7.1

Food

6.3

Overall

7.1

Reviews

1 / 20
2.0
Mediocre

Sugith,Jan 2026

YYZ - YSB

8 am flight cancelled at 2 am. Rebooked next day. Had to pay to rebook myself on Porter to leave same day.

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$ 601, however they can be found for as little as C$ 272.

  • 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. 3-bedroom building in serene Saint Ann with WiFi, AC is the closest property to Lambert-St Louis (0.0 km away from Lambert-St Louis).

See more FAQs

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Yes, Cheapflights offers price alerts on St. Charles flights so you can book your flight when prices are ideal. Enable price alerts by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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