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£270+ 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 8/5. Fares are subject to change and may not be available on all flights or dates of travel.
— STL
16 Apr — 23 Apr1
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 17 March 2026.

Wed 13/512:00
LHR
-
STL
1 stop13h 30m
American Airlines
Sat 23/513:45
STL
-
LHR
1 stop14h 45m
American Airlines
Deal found 12/3£501
Wed 13/516:25
LHR
-
STL
Nonstop9h 05m
British Airways
Wed 27/521:35
STL
-
LHR
Nonstop8h 00m
British Airways
Deal found 16/3£514
Wed 13/509:20
LHR
-
STL
1 stop14h 26m
Delta
Wed 27/516:20
STL
-
LHR
1 stop12h 00m
Delta
Deal found 12/3£516
Wed 13/509:20
LHR
-
STL
1 stop14h 26m
Delta
Mon 25/513:59
STL
-
LHR
1 stop11h 11m
Delta
Deal found 16/3£517
Fri 15/516:25
LHR
-
STL
Nonstop9h 05m
British Airways
Wed 27/521:35
STL
-
LHR
Nonstop8h 00m
British Airways
Deal found 12/3£521
Thu 14/509:45
LHR
-
STL
1 stop15h 48m
American Airlines
Sat 23/513:45
STL
-
LHR
1 stop14h 45m
American Airlines
Deal found 12/3£524
Wed 13/512:15
LHR
-
STL
1 stop16h 04m
American Airlines
Sun 24/511:18
STL
-
LHR
1 stop14h 32m
American Airlines
Deal found 12/3£528
Thu 14/509:20
LHR
-
STL
1 stop12h 50m
Delta
Tue 26/510:15
STL
-
LHR
1 stop14h 55m
Delta
Deal found 12/3£539
Fri 15/509:20
LHR
-
STL
1 stop14h 36m
Delta
Mon 25/510:19
STL
-
LHR
1 stop14h 51m
Delta
Deal found 16/3£540
Fri 24/414:00
LGW
-
STL
1 stop15h 19m
Multiple Airlines
Fri 8/517:27
STL
-
LGW
2 stops58h 33m
Multiple Airlines
Deal found 12/3£554
Tue 28/412:20
LGW
-
STL
2 stops17h 26m
American Airlines
Tue 5/507:00
STL
-
LGW
2 stops17h 50m
American Airlines
Deal found 14/3£592
Sat 21/1111:20
LGW
-
STL
2 stops18h 36m
American Airlines
Wed 2/1209:11
STL
-
LGW
2 stops17h 49m
American Airlines
Deal found 14/3£621

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 17 March 2026.

Return from

£501

One-way from

£294

Popular in

August

Cheapest in

January

Average price

£693
American Airlines
  • American Airlines
  • 13/5-23/5
  • 2 total stops
  • 28h 15m total
  • London to St. Louis
Search Deals
29/5
  • 29/5
  • 1 total stop
  • 16h 21m total
  • London to St. Charles
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (£66 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£12 potential savings vs. average return price).
Search Deals
Average for return flights in March 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 17 March 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

LGW - STL

LGWSTL

London Gatwick

Fri 24/4

14:00-23:19

1 stop15h 19m

Lambert-St Louis

Fri 8/5

17:27-10:00

2 stops58h 33m

£554

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Thu 30/4

11:00-10:54

1 stop29h 54m

Lambert-St Louis

Thu 7/5

11:45-08:00

1 stop14h 15m

£602
Fastest return journey

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Fri 1/5

13:10-19:33

1 stop12h 23m

Lambert-St Louis

Mon 4/5

16:30-09:05

1 stop10h 35m

£637

LondonSt. Louis

LCY - STL

LCYSTL

London City

Thu 30/4

15:30-19:29

2 stops33h 59m

Lambert-St Louis

Mon 4/5

08:54-13:20

2 stops22h 26m

£644

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 22/4

11:45-23:36

2 stops17h 51m

Lambert-St Louis

Fri 1/5

11:42-10:20

2 stops16h 38m

£650

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Fri 24/4

16:25-19:30

Nonstop9h 05m

Lambert-St Louis

Fri 8/5

07:05-07:40

1 stop18h 35m

£691

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Fri 24/4

11:45-23:36

2 stops17h 51m

Lambert-St Louis

Fri 8/5

10:49-07:10

2 stops14h 21m

£693

LondonSt. Louis

LCY - STL

LCYSTL

London City

Mon 27/4

19:15-19:33

2 stops30h 18m

Lambert-St Louis

Mon 4/5

11:14-15:15

2 stops22h 01m

£697

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 10/6

06:30-15:58

2 stops15h 28m

Lambert-St Louis

Mon 22/6

16:13-08:50

1 stop10h 37m

£730

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Fri 8/5

16:25-19:30

Nonstop9h 05m

Lambert-St Louis

Sun 24/5

15:35-18:55

1 stop21h 20m

£739

Flights are sorted by cheapest return flights first.

Deals found on 12/3

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

When is the best time to book a flight to St. Charles?

Use this chart to determine the optimal time to book a return flight from London to St. Charles. Price data was last updated on 13 March 2026.

To ensure you get the cheapest price possible for a flight to St. Charles, you should look to book at least 48 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

How long is the flight to St. Charles?

On average, a flight from London to St. Charles takes 16 hours 33 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, Finnair and Lufthansa.

British Airways
British Airways
From £483
Virgin Atlantic
Virgin Atlantic
From £515
United Airlines
United Airlines
From £477
Finnair
Finnair
From £587

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 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 17 March 2026.
Read through reviews of airlines serving the United States, such as Finnair,Virgin Atlantic, andUnited Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Finnair
7.6
Good
1,371 reviews
Check prices

Food

6.7

Overall

7.6

Crew

8.2

Boarding

7.7

Comfort

7.5

Entertainment

6.9

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights
Finnair
7.6
Good
1,371 reviews
Finnair
7.6
Good
1,371 reviews
Check prices

Food

6.7

Overall

7.6

Crew

8.2

Boarding

7.7

Comfort

7.5

Entertainment

6.9

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights
Virgin Atlantic
7.5
Good
682 reviews
Finnair
7.6
Good
1,371 reviews
Check prices

Food

6.7

Overall

7.6

Crew

8.2

Boarding

7.7

Comfort

7.5

Entertainment

6.9

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights
United Airlines
7.4
Good
9,431 reviews
Finnair
7.6
Good
1,371 reviews
Check prices

Food

6.7

Overall

7.6

Crew

8.2

Boarding

7.7

Comfort

7.5

Entertainment

6.9

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights
Air Canada
7.1
Good
10,811 reviews
Finnair
7.6
Good
1,371 reviews
Check prices

Food

6.7

Overall

7.6

Crew

8.2

Boarding

7.7

Comfort

7.5

Entertainment

6.9

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights
British Airways
6.7
Okay
7,797 reviews
Finnair
7.6
Good
1,371 reviews
Check prices

Food

6.7

Overall

7.6

Crew

8.2

Boarding

7.7

Comfort

7.5

Entertainment

6.9

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights

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 £406, however they can be found for as little as £213.

  • 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. 3-bedroom building in serene Saint Ann with WiFi, AC is the closest property to Lambert-St Louis (0.0 mi away from Lambert-St Louis).

See more FAQs

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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.

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

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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