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£279+ 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 4/9. Fares are subject to change and may not be available on all flights or dates of travel.
— STL
13 Sep — 20 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 14 August 2026.

Sun 20/914:00 -
2 stops29h 10m
Sun 27/917:19 -
1 stop34h 41m
Deal found 11/8£520
Fri 4/914:00 -
1 stop32h 11m
Thu 24/918:39 -
1 stop33h 21m
Deal found 12/8£528
Fri 4/914:00 -
1 stop32h 11m
Fri 18/914:29 -
2 stops33h 51m
Deal found 11/8£540
Wed 2/914:00 -
1 stop32h 11m
Wed 23/914:29 -
2 stops33h 51m
Deal found 12/8£557
Sat 26/917:00 -
2 stops36h 42m
Sat 3/1015:54 -
2 stops18h 06m
Deal found 12/8£568
Sat 26/914:00 -
1 stop32h 34m
Sat 3/1020:10 -
2 stops55h 50m
Deal found 12/8£584
Tue 15/908:55 -
1 stop16h 12m
Tue 29/921:35 -
Nonstop8h 00m
Deal found 10/8£587
Sat 17/1006:40 -
2 stops23h 14m
Sun 1/1112:00 -
2 stops22h 00m
Deal found 10/8£591
Wed 16/918:05 -
2 stops56h 39m
Wed 23/917:18 -
1 stop11h 32m
Deal found 11/8£600
Thu 24/918:40 -
2 stops35h 02m
Mon 28/914:30 -
2 stops19h 30m
Deal found 13/8£601
Wed 30/917:00 -
2 stops36h 42m
Sat 3/1015:54 -
2 stops18h 06m
Deal found 11/8£602
Fri 4/914:00 -
1 stop32h 11m
Sun 20/920:10 -
2 stops36h 30m
Deal found 10/8£606

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 858,174 searches and data was last updated on 14 August 2026.

Return from

£520

One-way from

£279

Popular in

December

Cheapest in

February

Average price

£874
20/9-27/9
  • 20/9-27/9
  • 3 total stops
  • 63h 51m total
  • London to St. Louis
Search Deals
4/9
  • 4/9
  • 1 total stop
  • 32h 11m total
  • London to St. Charles
Search Deals
Highest demand for flights based on searches. 1% potential increase in price (£9 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£15 potential savings vs. average return price).
Search Deals
Average for return flights in August 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 858,174 searches and data was last updated on 14 August 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 return flight

LondonSt. Louis

LHR London Heathrow - STL Lambert-St Louis

LHRSTL

London Heathrow

Thu 24/9

18:40-23:42

2 stops35h 02m

Lambert-St Louis

Mon 28/9

14:30-16:00

2 stops19h 30m

£601

LondonSt. Louis

LHR London Heathrow - STL Lambert-St Louis

LHRSTL

London Heathrow

Thu 10/9

06:40-23:42

3 stops23h 02m

Lambert-St Louis

Sat 10/10

14:25-17:40

2 stops21h 15m

£627

LondonSt. Louis

LHR London Heathrow - STL Lambert-St Louis

LHRSTL

London Heathrow

Mon 30/11

07:30-23:24

2 stops21h 54m

Lambert-St Louis

Thu 3/12

13:08-07:55

1 stop12h 47m

£636

LondonSt. Louis

LHR London Heathrow - STL Lambert-St Louis

LHRSTL

London Heathrow

Mon 7/9

06:50-17:06

2 stops16h 16m

Lambert-St Louis

Mon 14/9

15:32-10:40

2 stops13h 08m

£637

LondonSt. Louis

LHR London Heathrow - STL Lambert-St Louis

LHRSTL

London Heathrow

Sun 20/9

09:30-13:25

1 stop33h 55m

Lambert-St Louis

Sun 27/9

16:50-20:40

1 stop21h 50m

£646

LondonSt. Louis

LHR London Heathrow - STL Lambert-St Louis

LHRSTL

London Heathrow

Sun 6/9

07:25-17:06

2 stops15h 41m

Lambert-St Louis

Sun 13/9

16:50-21:35

1 stop22h 45m

£665

LondonSt. Louis

LHR London Heathrow - STL Lambert-St Louis

LHRSTL

London Heathrow

Mon 30/11

07:30-19:23

2 stops17h 53m

Lambert-St Louis

Sat 5/12

13:30-09:40

1 stop14h 10m

£666

LondonSt. Louis

LGW London Gatwick - STL Lambert-St Louis

LGWSTL

London Gatwick

Tue 20/10

06:25-20:00

3 stops19h 35m

Lambert-St Louis

Mon 26/10

16:05-22:30

3 stops25h 25m

£689
Fastest return journey

LondonSt. Louis

LHR London Heathrow - STL Lambert-St Louis

LHRSTL

London Heathrow

Thu 24/9

11:05-19:41

1 stop14h 36m

Lambert-St Louis

Mon 28/9

13:09-06:55

1 stop11h 46m

£689

LondonSt. Louis

LCY London City - STL Lambert-St Louis

LCYSTL

London City

Thu 24/9

08:25-20:35

2 stops18h 10m

Lambert-St Louis

Wed 7/10

12:00-09:30

2 stops15h 30m

£690

Flights are sorted by cheapest return flights first.

Deals found on 12/8

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
...
6

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 return 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 London to St. Charles takes 15 hours 37 minutes. Flights to St. Charles from other popular cities in United Kingdom 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 London to St. Charles are British Airways, Virgin Atlantic and United Airlines.

British Airways
British Airways
From £478
Virgin Atlantic
Virgin Atlantic
From £374
United Airlines
United Airlines
From £285
American Airlines
American Airlines
From £220

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

The cheapest airlines flying from London to St. Charles are American Airlines, United Airlines and Aer Lingus.

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 inches 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 14 August 2026.
Read through reviews of airlines serving the United States, such as Virgin Atlantic,United Airlines, andAmerican Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Virgin Atlantic
7.5
Good
694 reviews
Check prices

Comfort

7.3

Entertainment

7.5

Overall

7.5

Boarding

7.7

Food

6.9

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
Virgin Atlantic
7.5
Good
694 reviews
Virgin Atlantic
7.5
Good
694 reviews
Check prices

Comfort

7.3

Entertainment

7.5

Overall

7.5

Boarding

7.7

Food

6.9

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
United Airlines
7.4
Good
10,114 reviews
Virgin Atlantic
7.5
Good
694 reviews
Check prices

Comfort

7.3

Entertainment

7.5

Overall

7.5

Boarding

7.7

Food

6.9

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
American Airlines
7.1
Good
11,930 reviews
Virgin Atlantic
7.5
Good
694 reviews
Check prices

Comfort

7.3

Entertainment

7.5

Overall

7.5

Boarding

7.7

Food

6.9

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
Air Canada
7.1
Good
11,471 reviews
Virgin Atlantic
7.5
Good
694 reviews
Check prices

Comfort

7.3

Entertainment

7.5

Overall

7.5

Boarding

7.7

Food

6.9

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
British Airways
6.7
Okay
8,161 reviews
Virgin Atlantic
7.5
Good
694 reviews
Check prices

Comfort

7.3

Entertainment

7.5

Overall

7.5

Boarding

7.7

Food

6.9

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.

FAQs about flying to St. Charles

  • Can I find cheaper flights to St. Charles if I am willing to have stopovers?

    Yes, flights with stopovers 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, American Airlines is rated the highest out of the airlines that fly to St. Charles.

  • How much is a return flight to St. Charles?

    A return flight to St. Charles will typically cost around £1,036, however they can be found for as little as £725.

  • Where does the fastest flight to St. Charles depart from?

    For those looking to save time traveling to St. Charles, London offers the quickest one-way flight (9 hours 5 minutes).

  • Does Lambert-St Louis have car hire?

    Yes. Those touching down at Lambert-St Louis can take advantage of the car hire 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 mi away from Lambert-St Louis).

See more FAQs

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

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

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to St. Charles.

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

Cheapflights does show flights with no change fees to all users. To see these options for flights to St. Charles, users can toggle the no change fees filter when performing a flight search.

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Not ready to book yet? You can track prices for flights to St. Charles on Cheapflights with our Price Alerts feature and get notified when better prices are available.

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