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C$ 238+ 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 18/2. Fares are subject to change and may not be available on all flights or dates of travel.
— STL
1 Mar — 8 Mar1
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 30 January 2026.

Tue 24/27:15 a.m.
YYZ
-
STL
1 stop16h 12m
Multiple Airlines
Sat 28/22:51 p.m.
STL
-
YYZ
2 stops38h 52m
Multiple Airlines
Deal found 29/1C$ 349
Wed 25/27:10 a.m.
YYZ
-
STL
1 stop16h 17m
Multiple Airlines
Wed 4/38:17 p.m.
STL
-
YYZ
2 stops22h 38m
Multiple Airlines
Deal found 28/1C$ 385
Wed 25/26:00 a.m.
YYZ
-
STL
1 stop10h 35m
American Airlines
Wed 4/36:00 a.m.
STL
-
YYZ
1 stop10h 36m
American Airlines
Deal found 27/1C$ 396
Tue 24/27:15 a.m.
YYZ
-
STL
1 stop16h 12m
Multiple Airlines
Fri 27/23:49 p.m.
STL
-
YYZ
2 stops26h 45m
Multiple Airlines
Deal found 29/1C$ 403
Thu 5/28:20 p.m.
YYZ
-
STL
1 stop15h 03m
Multiple Airlines
Sun 8/25:42 p.m.
STL
-
YYZ
1 stop19h 38m
Multiple Airlines
Deal found 27/1C$ 407
Tue 24/27:15 a.m.
YYZ
-
STL
1 stop16h 12m
Multiple Airlines
Thu 26/29:50 a.m.
STL
-
YYZ
2 stops10h 19m
Multiple Airlines
Deal found 29/1C$ 421
Sat 28/27:10 a.m.
YYZ
-
STL
1 stop17h 49m
Multiple Airlines
Mon 9/37:47 a.m.
STL
-
YYZ
1 stop15h 27m
Multiple Airlines
Deal found 28/1C$ 430
Thu 9/48:20 p.m.
YYZ
-
STL
1 stop12h 31m
Multiple Airlines
Mon 13/48:41 a.m.
STL
-
YYZ
1 stop14h 33m
Multiple Airlines
Deal found 29/1C$ 446
Sat 28/31:10 p.m.
YYZ
-
STL
1 stop9h 01m
American Airlines
Tue 31/312:05 p.m.
STL
-
YYZ
1 stop8h 24m
American Airlines
Deal found 28/1C$ 450

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 30 January 2026.

Round-trip from

C$ 349

One-way from

C$ 238

Popular in

September

Cheapest in

June

Average price

C$ 534
24/2-28/2
  • 24/2-28/2
  • 3 total stops
  • 55h 04m total
  • Toronto to St. Louis
Search Deals
18/2
  • 18/2
  • 3 total stops
  • 36h 46m total
  • Toronto to St. Charles
Search Deals
Highest demand for flights based on searches. 1% potential increase in price (C$ 9 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 13 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 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 30 January 2026.
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

Tue 3/3

7:15 a.m.-10:27 p.m.

1 stop16h 12m

Lambert-St Louis

Thu 5/3

3:49 p.m.-12:14 a.m.

1 stop7h 25m

C$ 403

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sat 28/2

8:30 p.m.-6:51 a.m.

2 stops35h 21m

Lambert-St Louis

Mon 9/3

7:47 a.m.-12:14 a.m.

1 stop15h 27m

C$ 407

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Wed 25/2

7:10 a.m.-10:27 p.m.

1 stop16h 17m

Lambert-St Louis

Wed 4/3

8:17 p.m.-7:55 p.m.

2 stops22h 38m

C$ 437

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 24/2

1:10 p.m.-9:12 p.m.

1 stop9h 02m

Lambert-St Louis

Sat 28/2

10:43 a.m.-9:29 p.m.

1 stop9h 46m

C$ 458

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Wed 29/4

7:20 a.m.-9:47 p.m.

2 stops15h 27m

Lambert-St Louis

Wed 6/5

10:00 a.m.-6:33 p.m.

1 stop7h 33m

C$ 465

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sun 22/2

10:05 a.m.-6:51 a.m.

2 stops21h 46m

Lambert-St Louis

Sat 28/2

6:41 p.m.-6:20 a.m.

1 stop10h 39m

C$ 488

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Wed 18/3

8:20 p.m.-7:17 a.m.

1 stop11h 57m

Lambert-St Louis

Fri 20/3

9:50 a.m.-9:09 p.m.

2 stops10h 19m

C$ 500

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Mon 6/4

4:50 p.m.-8:35 a.m.

1 stop16h 45m

Lambert-St Louis

Thu 9/4

9:10 a.m.-6:57 p.m.

1 stop8h 47m

C$ 519

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Fri 27/2

5:15 p.m.-12:27 a.m.

1 stop8h 12m

Lambert-St Louis

Sun 1/3

10:11 p.m.-7:36 p.m.

2 stops20h 25m

C$ 521

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sat 28/3

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

Nonstop2h 29m

Lambert-St Louis

Tue 31/3

6:30 a.m.-8:44 p.m.

1 stop13h 14m

C$ 560

Flights are sorted by cheapest round-trip flights first.

Deals found on 28/1

Showing 1-10 of 18 results
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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$ 353
United Airlines
United Airlines
From C$ 326
WestJet
WestJet
From C$ 511
Delta
Delta
From C$ 442

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 30 January 2026.
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
9,216 reviews
Check prices

Crew

8.1

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Food

6.6

Overall

7.4

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats
United Airlines
7.4
Good
9,216 reviews
United Airlines
7.4
Good
9,216 reviews
Check prices

Crew

8.1

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Food

6.6

Overall

7.4

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats
Air Canada
7.1
Good
10,668 reviews
United Airlines
7.4
Good
9,216 reviews
Check prices

Crew

8.1

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Food

6.6

Overall

7.4

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats

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, United Airlines 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$ 613, however they can be found for as little as C$ 350.

  • 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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Users can book flights with no change fees policies with our dedicated filters. Book flights to St. Charles flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights to St. Charles become cheaper?

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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