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£255+ 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 6/3. Fares are subject to change and may not be available on all flights or dates of travel.
— STL
26 Feb — 5 Mar1
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 21 February 2025.

Return from

£540

One-way from

£255

Popular in

December

Cheapest in

January

Average price

£600
Finnair
  • Finnair
  • 4/3-11/3
  • 2 total stops
  • 30h 29m total
  • London to St. Louis
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6/3
  • 6/3
  • 1 total stop
  • 15h 49m total
  • London to St. Charles
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (£39 potential increase over avg. return price).
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Cheapest flight prices on average. 4% potential price decrease (£26 potential savings vs. average return price).
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Average for return flights in February 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 21 February 2025.

Tue 4/311:45LHR - STL
1 stop17h 55mFinnair
Tue 11/316:26STL - LHR
1 stop12h 34mFinnair
Deal found 20/2£540
Sat 1/314:00LGW - STL
1 stop15h 43mMultiple Airlines
Wed 5/318:43STL - LGW
1 stop33h 52mMultiple Airlines
Deal found 20/2£589
Tue 13/506:40LHR - STL
2 stops19h 03mMultiple Airlines
Tue 20/507:30STL - LHR
2 stops28h 10mMultiple Airlines
Deal found 20/2£687
Wed 5/307:45LTN - STL
3 stops38h 57mMultiple Airlines
Sun 9/316:45STL - LTN
2 stops24h 15mMultiple Airlines
Deal found 20/2£706
Wed 5/309:25LCY - STL
3 stops32h 45mMultiple Airlines
Sun 9/312:15STL - LCY
3 stops19h 35mMultiple Airlines
Deal found 20/2£717
Fri 14/308:30LHR - STL
2 stops37h 41mLufthansa
Mon 7/409:39STL - LHR
1 stop14h 41mLufthansa
Deal found 20/2£734
Fri 14/306:30LHR - STL
1 stop13h 25mUnited Airlines
Mon 7/413:12STL - LHR
2 stops15h 28mUnited Airlines
Deal found 20/2£740
Fri 18/412:30LHR - STL
1 stop14h 57mBritish Airways
Fri 25/405:45STL - LHR
1 stop19h 35mBritish Airways
Deal found 19/2£753
Tue 4/306:30LHR - STL
2 stops17h 31mDelta
Tue 11/310:30STL - LHR
2 stops14h 55mDelta
Deal found 20/2£768
Wed 5/311:00STN - STL
3 stops35h 42mMultiple Airlines
Sun 9/316:45STL - STN
2 stops24h 50mMultiple Airlines
Deal found 20/2£789
Fri 14/310:00LCY - STL
2 stops18h 32mLufthansa
Mon 7/417:35STL - LCY
2 stops16h 50mLufthansa
Deal found 20/2£800
Fri 14/307:45LCY - STL
2 stops18h 55mVirgin Atlantic
Mon 7/410:30STL - LCY
2 stops14h 45mVirgin Atlantic
Deal found 20/2£819

Find flights to St. Charles within your budget

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 21 February 2025.

Fly from

London

Route

Depart

Return

Price

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Tue 4/3

11:45-23:40

1 stop17h 55m

Lambert-St Louis

Tue 11/3

16:26-10:00

1 stop12h 34m

£540

LondonSt. Louis

LGW - STL

LGWSTL

London Gatwick

Fri 14/3

13:00-09:09

2 stops25h 09m

Lambert-St Louis

Mon 7/4

16:57-10:00

1 stop35h 03m

£609

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Tue 13/5

06:40-19:43

2 stops19h 03m

Lambert-St Louis

Tue 20/5

07:30-17:40

2 stops28h 10m

£687

LondonSt. Louis

LTN - STL

LTNSTL

London Luton

Wed 5/3

07:45-16:42

3 stops38h 57m

Lambert-St Louis

Sun 9/3

16:45-22:00

2 stops24h 15m

£706

LondonSt. Louis

LCY - STL

LCYSTL

London City

Wed 5/3

09:25-12:10

3 stops32h 45m

Lambert-St Louis

Sun 9/3

12:15-12:50

3 stops19h 35m

£717

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Fri 14/3

08:30-17:11

2 stops37h 41m

Lambert-St Louis

Mon 7/4

09:39-06:20

1 stop14h 41m

£734

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Fri 14/3

06:30-14:55

1 stop13h 25m

Lambert-St Louis

Mon 7/4

13:12-10:40

2 stops15h 28m

£740

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Fri 18/4

12:30-21:27

1 stop14h 57m

Lambert-St Louis

Fri 25/4

05:45-07:20

1 stop19h 35m

£753

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Tue 4/3

06:30-18:01

2 stops17h 31m

Lambert-St Louis

Tue 11/3

10:30-06:25

2 stops14h 55m

£768

LondonSt. Louis

STN - STL

STNSTL

London Stansted

Wed 5/3

11:00-16:42

3 stops35h 42m

Lambert-St Louis

Sun 9/3

16:45-22:35

2 stops24h 50m

£789

Flights are sorted by cheapest return flights first.

Deals found on 20/2

Showing 1-10 of 40 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.

Travel insights for flights to St. Charles

Get recent, data-driven insights about flights to St. Charles including ideal travel times, pricing trends, and more.

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 14 February 2025.

To ensure you get the cheapest price possible for a flight to St. Charles, you should look to book at least 19 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 19 hours 20 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 11 February 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 Virgin Atlantic.

Finnair

Finnair

From £662

British Airways

British Airways

From £833

Virgin Atlantic

Virgin Atlantic

From £852

Iberia

Iberia

From £791

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 21 February 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
8,213 reviews
Check prices

Comfort

8.0

Food

7.3

Entertainment

7.9

Overall

8.0

Crew

8.5

Boarding

8.2

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
8,213 reviews
Delta
8.0
Very Good
8,213 reviews
Check prices

Comfort

8.0

Food

7.3

Entertainment

7.9

Overall

8.0

Crew

8.5

Boarding

8.2

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
1,331 reviews
Delta
8.0
Very Good
8,213 reviews
Check prices

Comfort

8.0

Food

7.3

Entertainment

7.9

Overall

8.0

Crew

8.5

Boarding

8.2

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
1,273 reviews
Delta
8.0
Very Good
8,213 reviews
Check prices

Comfort

8.0

Food

7.3

Entertainment

7.9

Overall

8.0

Crew

8.5

Boarding

8.2

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
7.6
Good
773 reviews
Delta
8.0
Very Good
8,213 reviews
Check prices

Comfort

8.0

Food

7.3

Entertainment

7.9

Overall

8.0

Crew

8.5

Boarding

8.2

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

Virgin Atlantic
7.5
Good
654 reviews
Delta
8.0
Very Good
8,213 reviews
Check prices

Comfort

8.0

Food

7.3

Entertainment

7.9

Overall

8.0

Crew

8.5

Boarding

8.2

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

  • 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 £258, however they can be found for as little as £223.

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

    For those looking to save time traveling to St. Charles, Manchester offers the quickest one-way flight (13 hours 25 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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