Find flights
Deals
Airlines

C$ 269+ 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 16/9. Fares are subject to change and may not be available on all flights or dates of travel.
— STL
28 Aug — 4 Sep1
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 29 July 2026.

Mon 14/93:13 p.m.
YYZ
-
STL
1 stop10h 14m
American Airlines
Mon 21/97:21 a.m.
STL
-
YYZ
1 stop10h 14m
American Airlines
Deal found 26/7C$ 457
Tue 8/91:15 p.m.
YYZ
-
STL
1 stop11h 59m
American Airlines
Fri 11/95:00 a.m.
STL
-
YYZ
1 stop8h 32m
American Airlines
Deal found 26/7C$ 464
Thu 10/96:30 a.m.
YYZ
-
STL
1 stop7h 46m
American Airlines
Thu 17/95:00 a.m.
STL
-
YYZ
1 stop8h 32m
American Airlines
Deal found 26/7C$ 471
Thu 17/96:30 a.m.
YYZ
-
STL
1 stop7h 46m
American Airlines
Mon 21/97:21 a.m.
STL
-
YYZ
1 stop10h 14m
American Airlines
Deal found 27/7C$ 473
Tue 25/83:14 p.m.
YYZ
-
STL
1 stop10h 00m
American Airlines
Tue 1/96:00 a.m.
STL
-
YYZ
1 stop7h 33m
American Airlines
Deal found 28/7C$ 499
Thu 20/81:15 p.m.
YYZ
-
STL
1 stop11h 59m
American Airlines
Sat 29/85:00 a.m.
STL
-
YYZ
1 stop12h 30m
American Airlines
Deal found 25/7C$ 515
Mon 17/81:15 p.m.
YYZ
-
STL
1 stop11h 59m
American Airlines
Wed 19/86:00 a.m.
STL
-
YYZ
1 stop7h 33m
American Airlines
Deal found 27/7C$ 526
Mon 14/99:50 a.m.
YYZ
-
STL
1 stop7h 44m
Multiple Airlines
Mon 21/92:29 p.m.
STL
-
YYZ
2 stops25h 16m
Multiple Airlines
Deal found 28/7C$ 580
Sun 6/94:45 p.m.
YYZ
-
STL
2 stops21h 36m
Multiple Airlines
Sun 20/95:19 p.m.
STL
-
YYZ
1 stop25h 46m
Multiple Airlines
Deal found 28/7C$ 615
Tue 25/86:00 a.m.
YYZ
-
STL
1 stop4h 54m
Multiple Airlines
Sun 30/86:17 p.m.
STL
-
YYZ
2 stops19h 38m
Multiple Airlines
Deal found 27/7C$ 619

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 29 July 2026.

Round-trip from

C$ 457

One-way from

C$ 269

Popular in

March

Cheapest in

January

Average price

C$ 663
American Airlines
  • American Airlines
  • 14/9-21/9
  • 2 total stops
  • 20h 28m total
  • Toronto to St. Louis
Search Deals
American Airlines
  • American Airlines
  • 16/9
  • 1 total stop
  • 7h 46m total
  • Toronto to St. Charles
Search Deals
Highest demand for flights based on searches. 19% potential increase in price (C$ 176 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease (C$ 53 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 29 July 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

Thu 27/8

11:39 a.m.-7:27 p.m.

1 stop8h 48m

Lambert-St Louis

Thu 3/9

6:00 a.m.-4:45 p.m.

1 stop9h 45m

C$ 662

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 15/9

8:50 a.m.-3:38 p.m.

1 stop7h 48m

Lambert-St Louis

Wed 16/9

7:56 a.m.-5:01 p.m.

1 stop8h 05m

C$ 670

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 27/8

2:00 p.m.-6:42 p.m.

1 stop5h 42m

Lambert-St Louis

Thu 3/9

8:55 a.m.-11:52 a.m.

Nonstop1h 57m

C$ 674

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Fri 14/8

12:55 p.m.-2:04 p.m.

Nonstop2h 09m

Lambert-St Louis

Sun 16/8

12:10 p.m.-7:55 p.m.

1 stop6h 45m

C$ 734

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sat 12/9

12:55 p.m.-2:00 p.m.

Nonstop2h 05m

Lambert-St Louis

Sun 13/9

12:10 p.m.-6:53 p.m.

1 stop5h 43m

C$ 753
Quickest round-trip

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 20/8

12:55 p.m.-2:02 p.m.

Nonstop2h 07m

Lambert-St Louis

Sun 23/8

2:40 p.m.-5:37 p.m.

Nonstop1h 57m

C$ 759

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Mon 14/9

7:15 p.m.-8:20 p.m.

Nonstop2h 05m

Lambert-St Louis

Mon 21/9

8:30 a.m.-5:01 p.m.

1 stop7h 31m

C$ 762
Cheapest one-way

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Wed 16/9

6:30 a.m.-1:16 p.m.

1 stop7h 46m

C$ 269

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Mon 7/9

4:45 p.m.-1:31 p.m.

2 stops21h 46m

C$ 293

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 10/9

9:50 a.m.-1:10 p.m.

2 stops28h 20m

C$ 299

Flights are sorted by cheapest round-trip flights first.

Deals found on 24/7

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 5 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$ 191
United Airlines
United Airlines
From C$ 345
WestJet
WestJet
From C$ 464
American Airlines
American Airlines
From C$ 251

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 29 July 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
11,404 reviews
Check prices

Boarding

7.3

Comfort

7.1

Entertainment

6.8

Overall

7.1

Crew

7.8

Food

6.3

Reviews

1 / 20
10.0
Excellent

Anonymous,Nov 2025

YYZ - LAS

It's was great and the crew are very nice, captain has a smooth land on the runway 👍
Air Canada
7.1
Good
11,404 reviews
Air Canada
7.1
Good
11,404 reviews
Check prices

Boarding

7.3

Comfort

7.1

Entertainment

6.8

Overall

7.1

Crew

7.8

Food

6.3

Reviews

1 / 20
10.0
Excellent

Anonymous,Nov 2025

YYZ - LAS

It's was great and the crew are very nice, captain has a smooth land on the runway 👍

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.

  • 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 5 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. St Ann Townhome Less Than 1 Mi to International Airport! is the closest property to Lambert-St Louis (0.0 km away from Lambert-St Louis).

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Search flights to St. Charles by cabin class

Find flights to St. Charles, based on your preferred cabin class, be it economy, premium economy, business, or first class.
First class flights to St. Charles
Business class flights to St. Charles
Prem Economy class flights to St. Charles
Economy class flights to St. Charles

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights to St. Charles?

Cheapflights helps you search for flights to St. Charles via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets to St. Charles?

Cheapflights helps you find that perfect flight to St. Charles by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights to St. Charles with no change fees?

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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.