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£245+ 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 27/4. Fares are subject to change and may not be available on all flights or dates of travel.
— STL
4 Apr — 11 Apr1
1 adult

Flights to St. Charles in 2025

Find the latest flights to St. Charles in 2025, 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 30 March 2025.

Return from

£535

One-way from

£245

Popular in

December

Cheapest in

March

Average price

£571
13/5-20/5
  • 13/5-20/5
  • 6 total stops
  • 59h 12m total
  • London to St. Louis
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27/4
  • 27/4
  • 1 total stop
  • 16h 04m total
  • London to St. Charles
Search Deals
Highest demand for flights based on searches. 5% potential increase in price (£33 potential increase over avg. return price).
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Cheapest flight prices on average. 4% potential price decrease (£24 potential savings vs. average return price).
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Average for return flights in March 2025
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Find flight deals to St. Charles

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 30 March 2025.

Tue 13/517:00LGW - STL
3 stops28h 47mMultiple Airlines
Tue 20/507:30STL - LGW
3 stops30h 25mMultiple Airlines
Deal found 29/3£535
Thu 8/517:40LHR - STL
2 stops28h 09mUnited Airlines
Thu 22/513:42STL - LHR
1 stop13h 58mUnited Airlines
Deal found 30/3£604
Sat 10/514:10LHR - STL
2 stops27h 35mMultiple Airlines
Wed 21/513:00STL - LHR
2 stops35h 20mMultiple Airlines
Deal found 30/3£624
Mon 5/511:05LHR - STL
1 stop13h 28mBritish Airways
Mon 12/513:45STL - LHR
1 stop12h 20mBritish Airways
Deal found 30/3£638
Wed 7/509:25LCY - STL
3 stops32h 45mMultiple Airlines
Mon 12/512:15STL - LCY
3 stops22h 10mMultiple Airlines
Deal found 30/3£678
Thu 3/712:30LHR - STL
1 stop13h 49mIberia
Sun 13/719:59STL - LHR
1 stop29h 21mIberia
Deal found 30/3£691
Mon 13/1021:05LHR - STL
3 stops29h 42mScandinavian Airlines
Sat 8/1113:30STL - LHR
2 stops22h 10mScandinavian Airlines
Deal found 28/3£705
Mon 28/412:05LHR - STL
1 stop32h 44mAir Canada
Mon 12/513:30STL - LHR
1 stop14h 30mAir Canada
Deal found 30/3£731
Fri 2/506:30LHR - STL
1 stop13h 00mLufthansa
Sat 17/517:29STL - LHR
1 stop12h 16mLufthansa
Deal found 29/3£739
Wed 23/419:30LHR - STL
2 stops27h 53mAustrian Airlines
Sun 27/413:12STL - LHR
2 stops35h 43mAustrian Airlines
Deal found 29/3£742
Wed 3/906:15LTN - STL
3 stops42h 17mMultiple Airlines
Wed 24/916:05STL - LTN
2 stops24h 50mMultiple Airlines
Deal found 30/3£774
Wed 7/510:00LCY - STL
2 stops16h 49mVirgin Atlantic
Mon 12/518:05STL - LCY
2 stops16h 35mVirgin Atlantic
Deal found 30/3£783

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 30 March 2025.
Use the filters below to find and compare flights to St. Charles that are best for you.

Fly from

London

Route

Depart

Return

Price

LondonSt. Louis

LGW - STL

LGWSTL

London Gatwick

Tue 13/5

17:00-15:47

3 stops28h 47m

Lambert-St Louis

Tue 20/5

07:30-19:55

3 stops30h 25m

£535

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Thu 8/5

17:40-15:49

2 stops28h 09m

Lambert-St Louis

Thu 22/5

13:42-09:40

1 stop13h 58m

£604

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Sat 10/5

14:10-11:45

2 stops27h 35m

Lambert-St Louis

Wed 21/5

13:00-06:20

2 stops35h 20m

£624

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 5/5

11:05-18:33

1 stop13h 28m

Lambert-St Louis

Mon 12/5

13:45-08:05

1 stop12h 20m

£638

LondonSt. Louis

LCY - STL

LCYSTL

London City

Wed 7/5

09:25-12:10

3 stops32h 45m

Lambert-St Louis

Mon 12/5

12:15-16:25

3 stops22h 10m

£678

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Thu 3/7

12:30-20:19

1 stop13h 49m

Lambert-St Louis

Sun 13/7

19:59-07:20

1 stop29h 21m

£691

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Sat 19/4

06:40-23:36

2 stops22h 56m

Lambert-St Louis

Sat 3/5

16:15-16:00

2 stops17h 45m

£723

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 28/4

12:05-14:49

1 stop32h 44m

Lambert-St Louis

Mon 12/5

13:30-10:00

1 stop14h 30m

£731

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Fri 2/5

06:30-13:30

1 stop13h 00m

Lambert-St Louis

Sat 17/5

17:29-11:45

1 stop12h 16m

£739

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 23/4

19:30-17:23

2 stops27h 53m

Lambert-St Louis

Sun 27/4

13:12-06:55

2 stops35h 43m

£742

Flights are sorted by cheapest return flights first.

Deals found on 29/3

Showing 1-10 of 42 results
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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 28 March 2025.

To ensure you get the cheapest price possible for a flight to St. Charles, you should look to book at least 13 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 15 hours 53 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.

When is the cheapest time to fly to St. Charles?

Use this chart to determine the cheapest time to fly return from London to St. Charles. Price data was last updated on 30 June 2024.

Users looking for the lowest fares to St. Charles should consider flying on Wednesday at midday, when prices are typically cheapest. Budget-minded travellers will want to avoid Sunday afternoons, when prices are usually at their highest.

What are the most popular airlines that fly to St. Charles?

The most popular airlines flying from London to St. Charles are Finnair, British Airways and Iberia.

Finnair

Finnair

From £674

British Airways

British Airways

From £834

Iberia

Iberia

From £803

Virgin Atlantic

Virgin Atlantic

From £852

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

The cheapest airlines flying from London to St. Charles are Finnair, Iberia 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 30 March 2025.
Read reviews from past customers who have flown Delta, KLM and Finnair to St. Charles. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very Good
7,897 reviews
Check prices

Comfort

7.9

Food

7.3

Entertainment

7.9

Overall

8.0

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very Good
7,897 reviews
Delta
8.0
Very Good
7,897 reviews
Check prices

Comfort

7.9

Food

7.3

Entertainment

7.9

Overall

8.0

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
KLM
7.8
Good
1,321 reviews
Delta
8.0
Very Good
7,897 reviews
Check prices

Comfort

7.9

Food

7.3

Entertainment

7.9

Overall

8.0

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Finnair
7.6
Good
1,267 reviews
Delta
8.0
Very Good
7,897 reviews
Check prices

Comfort

7.9

Food

7.3

Entertainment

7.9

Overall

8.0

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Austrian Airlines
7.5
Good
769 reviews
Delta
8.0
Very Good
7,897 reviews
Check prices

Comfort

7.9

Food

7.3

Entertainment

7.9

Overall

8.0

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Air France
7.4
Good
1,425 reviews
Delta
8.0
Very Good
7,897 reviews
Check prices

Comfort

7.9

Food

7.3

Entertainment

7.9

Overall

8.0

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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, Finnair 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 £357, however they can be found for as little as £97.

  • 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 (14 hours 22 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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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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