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C$ 298+ 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 13/7. Fares are subject to change and may not be available on all flights or dates of travel.
— STL
12 Jul — 19 Jul1
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 12 June 2026.

Thu 16/72:50 p.m.
YYZ
-
STL
2 stops28h 25m
Multiple Airlines
Tue 21/77:03 p.m.
STL
-
YYZ
1 stop10h 36m
Multiple Airlines
Deal found 10/6C$ 584
Mon 3/810:50 a.m.
YYZ
-
STL
2 stops32h 15m
Multiple Airlines
Mon 10/87:10 p.m.
STL
-
YYZ
1 stop20h 59m
Multiple Airlines
Deal found 12/6C$ 585
Thu 16/77:15 p.m.
YYZ
-
STL
Nonstop2h 07m
Air Canada
Sat 25/78:55 a.m.
STL
-
YYZ
Nonstop1h 57m
Air Canada
Deal found 8/6C$ 587
Tue 14/710:50 a.m.
YYZ
-
STL
2 stops32h 15m
Multiple Airlines
Tue 21/77:03 p.m.
STL
-
YYZ
1 stop10h 36m
Multiple Airlines
Deal found 11/6C$ 588
Wed 22/72:50 p.m.
YYZ
-
STL
2 stops28h 25m
Multiple Airlines
Mon 27/77:10 p.m.
STL
-
YYZ
1 stop20h 59m
Multiple Airlines
Deal found 11/6C$ 589
Sun 5/712:55 p.m.
YYZ
-
STL
Nonstop2h 07m
Air Canada
Sun 12/712:10 p.m.
STL
-
YYZ
1 stop5h 51m
Air Canada
Deal found 7/6C$ 591
Mon 24/82:00 p.m.
YYZ
-
STL
1 stop5h 42m
Air Canada
Tue 25/812:10 p.m.
STL
-
YYZ
1 stop6h 51m
Air Canada
Deal found 8/6C$ 595
Tue 4/87:45 a.m.
YYZ
-
STL
1 stop17h 14m
Multiple Airlines
Mon 10/87:10 p.m.
STL
-
YYZ
2 stops33h 35m
Multiple Airlines
Deal found 12/6C$ 596
Sun 28/64:45 p.m.
YYZ
-
STL
2 stops26h 51m
Multiple Airlines
Wed 1/77:46 p.m.
STL
-
YYZ
1 stop9h 53m
Multiple Airlines
Deal found 10/6C$ 603
Sun 28/64:45 p.m.
YYZ
-
STL
2 stops26h 51m
Multiple Airlines
Thu 2/712:11 p.m.
STL
-
YYZ
1 stop17h 28m
Multiple Airlines
Deal found 12/6C$ 605

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 12 June 2026.

Round-trip from

C$ 468

One-way from

C$ 298

Popular in

March

Cheapest in

January

Average price

C$ 634
American Airlines
  • American Airlines
  • 15/7-22/7
  • 2 total stops
  • 17h 15m total
  • Toronto to St. Louis
Search Deals
13/7
  • 13/7
  • 3 total stops
  • 36h 05m total
  • Toronto to St. Charles
Search Deals
Highest demand for flights based on searches. 21% potential increase in price (C$ 191 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 June 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 12 June 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

Wed 28/10

12:05 p.m.-8:51 p.m.

1 stop9h 46m

Lambert-St Louis

Mon 2/11

2:18 p.m.-11:00 p.m.

1 stop7h 42m

C$ 638

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Wed 22/7

6:10 a.m.-9:31 a.m.

1 stop4h 21m

Lambert-St Louis

Mon 27/7

6:09 p.m.-11:02 p.m.

1 stop3h 53m

C$ 662

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 28/7

9:00 p.m.-8:49 a.m.

1 stop12h 49m

Lambert-St Louis

Wed 29/7

11:25 a.m.-5:56 p.m.

1 stop5h 31m

C$ 670
Quickest round-trip

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 25/6

11:15 a.m.-12:21 p.m.

Nonstop2h 06m

Lambert-St Louis

Sun 28/6

8:40 a.m.-11:37 a.m.

Nonstop1h 57m

C$ 672

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sat 1/8

7:30 p.m.-11:44 p.m.

1 stop5h 14m

Lambert-St Louis

Wed 5/8

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

Nonstop1h 57m

C$ 677

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Wed 1/7

10:15 a.m.-2:23 p.m.

1 stop5h 08m

Lambert-St Louis

Sun 5/7

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

Nonstop1h 57m

C$ 679

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 9/7

2:24 p.m.-5:24 p.m.

1 stop4h 00m

Lambert-St Louis

Sun 12/7

6:30 a.m.-3:20 p.m.

1 stop7h 50m

C$ 679

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 30/6

5:15 p.m.-11:29 p.m.

1 stop7h 14m

Lambert-St Louis

Wed 1/7

6:00 a.m.-11:49 a.m.

1 stop4h 49m

C$ 679

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 25/6

11:00 a.m.-3:46 p.m.

1 stop5h 46m

Lambert-St Louis

Wed 1/7

6:00 a.m.-1:42 p.m.

1 stop6h 42m

C$ 679

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 25/6

5:15 p.m.-9:26 p.m.

1 stop5h 11m

Lambert-St Louis

Mon 29/6

6:00 a.m.-2:19 p.m.

2 stops7h 19m

C$ 679

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/6

Showing 1-10 of 21 resultsSorted by cheapest first
1
2
3

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 Thursday, which is when the least amount of flights are scheduled (3 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$ 215
United Airlines
United Airlines
From C$ 342
WestJet
WestJet
From C$ 460
American Airlines
American Airlines
From C$ 278

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 12 June 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
9,812 reviews
Check prices

Boarding

7.7

Entertainment

7.1

Overall

7.4

Comfort

7.3

Crew

8.1

Food

6.6

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.
United Airlines
7.4
Good
9,812 reviews
United Airlines
7.4
Good
9,812 reviews
Check prices

Boarding

7.7

Entertainment

7.1

Overall

7.4

Comfort

7.3

Crew

8.1

Food

6.6

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.
Air Canada
7.1
Good
11,169 reviews
United Airlines
7.4
Good
9,812 reviews
Check prices

Boarding

7.7

Entertainment

7.1

Overall

7.4

Comfort

7.3

Crew

8.1

Food

6.6

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.

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$ 794, however they can be found for as little as C$ 274.

  • 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. 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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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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