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£309+ 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 28/8. Fares are subject to change and may not be available on all flights or dates of travel.
— STL
6 Jul — 13 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 6 June 2026.

Fri 17/714:00
LGW
-
STL
1 stop15h 59m
Multiple Airlines
Fri 24/716:09
STL
-
LGW
1 stop35h 51m
Multiple Airlines
Deal found 2/6£760
Mon 7/910:25
LGW
-
STL
2 stops17h 38m
Delta
Sat 31/1012:30
STL
-
LGW
2 stops15h 30m
Delta
Deal found 1/6£763
Tue 7/710:05
LHR
-
STL
2 stops20h 11m
Finnair
Sun 12/719:55
STL
-
LHR
1 stop30h 10m
Finnair
Deal found 1/6£766
Fri 19/614:00
LGW
-
STL
1 stop15h 49m
Multiple Airlines
Fri 26/616:17
STL
-
LGW
1 stop35h 43m
Multiple Airlines
Deal found 2/6£769
Thu 27/806:30
STN
-
STL
3 stops19h 37m
Multiple Airlines
Thu 3/908:55
STL
-
STN
2 stops26h 15m
Multiple Airlines
Deal found 2/6£769
Sat 27/619:30
LHR
-
STL
2 stops34h 29m
British Airways
Mon 6/719:22
STL
-
LHR
1 stop13h 03m
British Airways
Deal found 3/6£770
Sat 4/709:15
LHR
-
STL
1 stop13h 47m
British Airways
Fri 10/719:56
STL
-
LHR
1 stop10h 19m
British Airways
Deal found 5/6£771
Wed 17/614:00
LGW
-
STL
1 stop15h 49m
Multiple Airlines
Sat 20/616:17
STL
-
LGW
1 stop35h 43m
Multiple Airlines
Deal found 3/6£771
Sat 17/1009:45
LHR
-
STL
1 stop12h 30m
British Airways
Sat 31/1018:51
STL
-
LHR
1 stop12h 09m
British Airways
Deal found 4/6£772
Wed 1/708:40
LHR
-
STL
2 stops17h 27m
Air Canada
Wed 8/712:10
STL
-
LHR
2 stops17h 40m
Air Canada
Deal found 3/6£772
Sat 11/712:00
LHR
-
STL
1 stop14h 03m
British Airways
Fri 17/718:13
STL
-
LHR
1 stop11h 57m
British Airways
Deal found 3/6£773
Mon 29/613:40
LHR
-
STL
2 stops16h 16m
Virgin Atlantic
Mon 6/713:59
STL
-
LHR
2 stops14h 41m
Virgin Atlantic
Deal found 1/6£774

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 6 June 2026.

Return from

£760

One-way from

£309

Popular in

July

Cheapest in

February

Average price

£780
17/7-24/7
  • 17/7-24/7
  • 2 total stops
  • 51h 50m total
  • London to St. Louis
Search Deals
28/8
  • 28/8
  • 1 total stop
  • 16h 14m total
  • London to St. Charles
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (£93 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 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 858,174 searches and data was last updated on 6 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 return flight

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Sat 4/7

09:15-17:02

1 stop13h 47m

Lambert-St Louis

Fri 10/7

19:56-12:15

1 stop10h 19m

£771
Fastest return journey

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Sat 4/7

09:15-15:28

1 stop12h 13m

Lambert-St Louis

Sun 12/7

21:40-11:40

Nonstop8h 00m

£771

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Sat 24/10

13:45-23:41

1 stop15h 56m

Lambert-St Louis

Sun 1/11

14:08-09:15

1 stop13h 07m

£772

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Sat 31/10

11:35-20:59

1 stop14h 24m

Lambert-St Louis

Sun 1/11

17:20-10:25

1 stop11h 05m

£789

LondonSt. Louis

LGW - STL

LGWSTL

London Gatwick

Wed 26/8

10:25-23:26

2 stops19h 01m

Lambert-St Louis

Thu 3/9

12:52-09:25

2 stops14h 33m

£791

LondonSt. Louis

LGW - STL

LGWSTL

London Gatwick

Tue 7/7

14:00-23:59

1 stop15h 59m

Lambert-St Louis

Wed 29/7

16:09-10:00

1 stop35h 51m

£795

LondonSt. Louis

LCY - STL

LCYSTL

London City

Tue 7/7

09:20-20:37

2 stops17h 17m

Lambert-St Louis

Wed 29/7

11:18-07:15

2 stops13h 57m

£805

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Thu 9/7

06:30-17:24

2 stops16h 54m

Lambert-St Louis

Thu 16/7

06:21-13:05

1 stop24h 44m

£807

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Fri 3/7

06:30-17:23

2 stops16h 53m

Lambert-St Louis

Tue 14/7

10:19-08:50

2 stops16h 31m

£807

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Fri 10/7

06:30-16:46

2 stops16h 16m

Lambert-St Louis

Sun 26/7

10:51-11:20

1 stop18h 29m

£836

Flights are sorted by cheapest return flights first.

Deals found on 31/5

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 56 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, United Airlines and Lufthansa.

British Airways
British Airways
From £479
Virgin Atlantic
Virgin Atlantic
From £511
United Airlines
United Airlines
From £480
Lufthansa
Lufthansa
From £624

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

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

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

Comfort

7.3

Food

6.9

Crew

8.1

Entertainment

7.5

Overall

7.5

Boarding

7.7

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
689 reviews
Virgin Atlantic
7.5
Good
689 reviews
Check prices

Comfort

7.3

Food

6.9

Crew

8.1

Entertainment

7.5

Overall

7.5

Boarding

7.7

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
9,779 reviews
Virgin Atlantic
7.5
Good
689 reviews
Check prices

Comfort

7.3

Food

6.9

Crew

8.1

Entertainment

7.5

Overall

7.5

Boarding

7.7

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
11,129 reviews
Virgin Atlantic
7.5
Good
689 reviews
Check prices

Comfort

7.3

Food

6.9

Crew

8.1

Entertainment

7.5

Overall

7.5

Boarding

7.7

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
Lufthansa
6.8
Okay
8,038 reviews
Virgin Atlantic
7.5
Good
689 reviews
Check prices

Comfort

7.3

Food

6.9

Crew

8.1

Entertainment

7.5

Overall

7.5

Boarding

7.7

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
8,028 reviews
Virgin Atlantic
7.5
Good
689 reviews
Check prices

Comfort

7.3

Food

6.9

Crew

8.1

Entertainment

7.5

Overall

7.5

Boarding

7.7

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 £261, however they can be found for as little as £261.

  • 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. Hampton Inn St. Louis-Airport is the closest property to Lambert-St Louis (0.0 mi away from Lambert-St Louis).

See more FAQs

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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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