What is the cheapest month to fly to St. Charles?

February is currently the cheapest month to fly to St. Charles . At this moment in time December is the most expensive month. These prices are determined by multiple factors and booking in advance can help keep costs down if your schedule is not as flexible.

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 £539, however they can be found for as little as £428.

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 (11 hours 56 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).

£260+ Flights to St. Charles

Flights to St. Charles in 2025

Return from	£597
One-way from	£260
Popular in	December
Cheapest in	March
Average price	£699

18/6-21/6
2 total stops
50h 16m total
London to St. Louis

Search Deals

29/5
1 total stop
15h 52m total
London to St. Charles

Search Deals

Highest demand for flights based on searches. 4% potential increase in price (£26 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 4% potential price decrease (£22 potential savings vs. average return price).

Search Deals

Average for return flights in April 2025

Search Deals

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 April 2025.

Wed 18/614:00LGW - STL

1 stop15h 53mMultiple Airlines

Sat 21/617:47STL - LGW

1 stop34h 23mMultiple Airlines

Deal found 29/4£597

Wed 3/906:30LHR - STL

2 stops19h 51mBritish Airways

Wed 10/920:01STL - LHR

1 stop10h 14mBritish Airways

Deal found 29/4£674

Wed 14/514:30LHR - STL

2 stops24h 45mMultiple Airlines

Sun 18/510:10STL - LHR

2 stops19h 45mMultiple Airlines

Deal found 29/4£682

Wed 3/906:40LHR - STL

2 stops22h 59mScandinavian Airlines

Wed 24/913:30STL - LHR

2 stops20h 30mScandinavian Airlines

Deal found 29/4£683

Sat 4/1008:30LHR - STL

2 stops33h 55mLufthansa

Wed 22/1012:28STL - LHR

1 stop11h 52mLufthansa

Deal found 29/4£688

Wed 3/908:30STN - STL

2 stops17h 03mMultiple Airlines

Wed 24/916:05STL - STN

2 stops21h 55mMultiple Airlines

Deal found 29/4£705

Tue 27/512:30LHR - STL

1 stop14h 28mIberia

Tue 3/610:31STL - LHR

1 stop14h 49mIberia

Deal found 29/4£708

Fri 12/909:30LHR - STL

1 stop16h 27mAir Canada

Sat 20/913:30STL - LHR

1 stop11h 00mAir Canada

Deal found 29/4£746

Tue 6/514:05LHR - STL

1 stop11h 53mUnited Airlines

Tue 13/513:30STL - LHR

1 stop11h 00mUnited Airlines

Deal found 29/4£748

Tue 6/511:30LHR - STL

2 stops16h 06mVirgin Atlantic

Tue 13/510:45STL - LHR

2 stops14h 00mVirgin Atlantic

Deal found 29/4£770

Sun 1/617:50LCY - STL

3 stops32h 08mMultiple Airlines

Sun 15/606:30STL - LCY

3 stops27h 55mMultiple Airlines

Deal found 29/4£779

Fri 12/910:40LGW - STL

2 stops18h 43mFinnair

Sat 20/907:34STL - LGW

2 stops18h 36mFinnair

Deal found 29/4£791

Best flights to St. Charles
Discover carefully curated flight deals to St. Charles that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 30 April 2025.

Wed 18/614:00LGW - STL

1 stop15h 53mMultiple Airlines

Sat 21/617:47STL - LGW

1 stop34h 23mMultiple Airlines

Deal found 29/4£597

Wed 3/906:30LHR - STL

2 stops19h 51mBritish Airways

Wed 10/920:01STL - LHR

1 stop10h 14mBritish Airways

Deal found 29/4£674

Wed 3/906:40LHR - STL

2 stops22h 59mScandinavian Airlines

Wed 24/913:30STL - LHR

2 stops20h 30mScandinavian Airlines

Deal found 29/4£683

Sat 4/1008:30LHR - STL

2 stops32h 04mLufthansa

Wed 22/1012:28STL - LHR

2 stops12h 27mLufthansa

Deal found 29/4£688

Tue 27/512:30LHR - STL

1 stop14h 28mIberia

Tue 3/610:31STL - LHR

1 stop14h 49mIberia

Deal found 29/4£708

Fri 12/909:30LHR - STL

1 stop16h 27mAir Canada

Sat 20/913:30STL - LHR

1 stop11h 00mAir Canada

Deal found 29/4£746

Fri 12/910:40LGW - STL

2 stops18h 43mFinnair

Sat 20/907:34STL - LGW

2 stops18h 36mFinnair

Deal found 29/4£791

Wed 4/606:30LHR - STL

1 stop13h 00mUnited Airlines

Sun 29/613:25STL - LHR

1 stop10h 55mUnited Airlines

Deal found 29/4£856

Mon 16/612:20LGW - STL

2 stops17h 39mAmerican Airlines

Mon 30/607:50STL - LGW

2 stops16h 45mAmerican Airlines

Deal found 28/4£878

Mon 19/508:40LHR - STL

2 stops18h 09mDelta

Mon 2/610:05STL - LHR

2 stops16h 45mDelta

Deal found 29/4£886

Tue 27/507:45LCY - STL

2 stops21h 41mVirgin Atlantic

Tue 3/610:45STL - LCY

2 stops14h 30mVirgin Atlantic

Deal found 29/4£901

Fri 13/606:00LHR - STL

2 stops21h 25mAustrian Airlines

Fri 20/611:30STL - LHR

2 stops20h 50mAustrian Airlines

Deal found 29/4£928

Last-minute flights to St. Charles
Discover last-minute flight deals to St. Charles. Data last updated 30 April 2025 and is based on user searches.

Wed 30/413:25LHR - STL

2 stops16h 08mAer Lingus

Wed 7/513:38STL - LHR

2 stops17h 47mAer Lingus

Deal found 29/4£864

Mon 5/513:25LHR - STL

2 stops16h 26mAer Lingus

Mon 26/506:00STL - LHR

2 stops21h 05mAer Lingus

Deal found 29/4£985

Mon 5/514:25LHR - STL

1 stop13h 27mIberia

Mon 26/513:45STL - LHR

1 stop13h 15mIberia

Deal found 29/4£1,056

Mon 5/513:05LHR - STL

1 stop13h 34mAir France

Tue 27/515:40STL - LHR

1 stop13h 30mAir France

Deal found 29/4£1,236

Tue 6/510:30LHR - STL

2 stops15h 28mMultiple Airlines

Tue 13/513:30STL - LHR

1 stop11h 00mMultiple Airlines

Deal found 29/4£723

Tue 6/514:05LHR - STL

1 stop11h 53mUnited Airlines

Tue 13/513:30STL - LHR

1 stop11h 00mUnited Airlines

Deal found 29/4£748

Tue 6/509:30LHR - STL

1 stop16h 28mAir Canada

Fri 23/507:30STL - LHR

2 stops17h 00mAir Canada

Deal found 29/4£764

Tue 6/511:30LHR - STL

2 stops16h 06mVirgin Atlantic

Tue 13/510:45STL - LHR

2 stops14h 00mVirgin Atlantic

Deal found 29/4£770

Tue 6/511:45LHR - STL

2 stops17h 51mDelta

Tue 27/511:32STL - LHR

1 stop19h 38mDelta

Deal found 29/4£826

Tue 6/506:00STN - STL

3 stops19h 58mMultiple Airlines

Tue 13/514:30STL - STN

2 stops17h 50mMultiple Airlines

Deal found 29/4£918

Tue 6/506:45LCY - STL

2 stops21h 07mAer Lingus

Tue 13/516:15STL - LCY

2 stops20h 05mAer Lingus

Deal found 29/4£1,178

Fri 9/515:05LGW - STL

2 stops33h 16mMultiple Airlines

Tue 13/509:36STL - LGW

2 stops16h 34mMultiple Airlines

Deal found 29/4£761

One-way flights to St. Charles
Search for one-way flight options to St. Charles. Find affordable one-way fares based on user searches. Data last updated 30 April 2025.

Thu 29/514:00LGW - STL

1 stop15h 52mMultiple Airlines

Deal found 29/4£260

Thu 29/519:30LTN - STL

3 stops49h 24mMultiple Airlines

Deal found 29/4£304

Thu 29/506:50STN - STL

3 stops32h 19mMultiple Airlines

Deal found 29/4£400

Mon 23/606:15LHR - STL

3 stops47h 38mMultiple Airlines

Deal found 29/4£421

Thu 29/508:45LCY - STL

3 stops30h 24mMultiple Airlines

Deal found 29/4£485

Sat 5/708:50LHR - STL

2 stops29h 06mAer Lingus

Deal found 29/4£670

Thu 29/514:10LHR - STL

1 stop13h 42mFinnair

Deal found 29/4£675

Mon 23/612:30LHR - STL

1 stop13h 49mBritish Airways

Deal found 29/4£721

Sat 5/705:30LGW - STL

2 stops23h 15mTurkish Airlines

Deal found 29/4£845

Sat 5/708:30LHR - STL

1 stop13h 17mLufthansa

Deal found 29/4£875

Wed 14/506:45LCY - STL

2 stops17h 48mAer Lingus

Deal found 28/4£1,034

Fri 20/606:40LHR - STL

2 stops20h 54mScandinavian Airlines

Deal found 29/4£1,339

Cheapflights Fare Finder

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

Fly from

Route

Depart

Return

Price

LondonSt. Louis

LGW - STL

LGWSTL

London Gatwick

Wed 18/6

14:00-23:53

1 stop15h 53m

Lambert-St Louis

Sat 21/6

17:47-10:10

1 stop34h 23m

£597

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 3/9

06:30-20:21

2 stops19h 51m

Lambert-St Louis

Wed 10/9

20:01-12:15

1 stop10h 14m

£674

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 14/5

14:30-09:15

2 stops24h 45m

Lambert-St Louis

Sun 18/5

10:10-11:55

2 stops19h 45m

£682

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 3/9

06:40-23:39

2 stops22h 59m

Lambert-St Louis

Wed 24/9

13:30-16:00

2 stops20h 30m

£683

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Sat 4/10

08:30-10:34

2 stops32h 04m

Lambert-St Louis

Wed 22/10

12:28-06:55

2 stops12h 27m

£688

LondonSt. Louis

STN - STL

STNSTL

London Stansted

Wed 3/9

08:30-19:33

2 stops17h 03m

Lambert-St Louis

Wed 24/9

16:05-20:00

2 stops21h 55m

£705

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Tue 27/5

12:30-20:58

1 stop14h 28m

Lambert-St Louis

Tue 3/6

10:31-07:20

1 stop14h 49m

£708

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Fri 12/9

09:30-19:57

1 stop16h 27m

Lambert-St Louis

Sat 20/9

13:30-06:30

1 stop11h 00m

£746

LondonSt. Louis

LCY - STL

LCYSTL

London City

Sun 1/6

17:50-19:58

3 stops32h 08m

Lambert-St Louis

Sun 15/6

06:30-16:25

3 stops27h 55m

£779

LondonSt. Louis

LGW - STL

LGWSTL

London Gatwick

Fri 12/9

10:40-23:23

2 stops18h 43m

Lambert-St Louis

Sat 20/9

07:34-08:10

2 stops18h 36m

£791

Flights are sorted by cheapest return flights first.

Deals found on 29/4

Showing 1-10 of 42 results

...

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?

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 16 hours 13 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?

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

From £680

British Airways

From £843

Iberia

From £806

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

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

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

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

7,934 reviews

Check prices

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

7,934 reviews

Delta

8.0

Very Good

7,934 reviews

Check prices

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

1,334 reviews

Delta

8.0

Very Good

7,934 reviews

Check prices

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

1,275 reviews

Delta

8.0

Very Good

7,934 reviews

Check prices

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

780 reviews

Delta

8.0

Very Good

7,934 reviews

Check prices

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

1,446 reviews

Delta

8.0

Very Good

7,934 reviews

Check prices

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 £539, however they can be found for as little as £428.
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 (11 hours 56 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

Browse thousands of different options on Cheapflights for your next trip

Search flights to St. Charles by cabin class

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

Deals for St. Charles flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose to your preference, such as price, airport, cabin class, and plenty of other options.

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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£260+ 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 29/5. Fares are subject to change and may not be available on all flights or dates of travel.

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 April 2025.

Return from

One-way from

Popular in

Cheapest in

Average price

Find flight deals to St. Charles

Cheapest flights to St. CharlesExplore 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 April 2025.

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 April 2025.

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 April 2025.

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

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.

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 25 April 2025.

How long is the flight to St. Charles?

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.

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

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

Rainfall in St. Charles by month

Plan your trip to St. Charles by taking into account the average rainfall totals by month.

Temperature in St. Charles by month

Plan your trip to St. Charles by taking into account the average temperature totals by month.

Reviews of airlines servicing St. Charles

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.

FAQs about flying to St. Charles

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

What is the best airline to fly to St. Charles?

How much is a return flight to St. Charles?

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

Does Lambert-St Louis have car hire?

Are there hotels close to Lambert-St Louis?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Search flights to St. Charles by cabin class

Find flights to St. Charles, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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

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

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

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

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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 April 2025.