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 (12 hours 46 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).

£240+ Flights to St. Charles

Flights to St. Charles in 2025

Return from	£537
One-way from	£240
Popular in	December
Cheapest in	March
Average price	£694

8/5-24/5
2 total stops
50h 41m total
London to St. Louis

Search Deals

16/5
1 total stop
16h 14m total
London to St. Charles

Search Deals

Highest demand for flights based on searches. 4% potential increase in price (£27 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 4% potential price decrease (£23 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 26 April 2025.

Thu 8/514:00LGW - STL

1 stop16h 06mMultiple Airlines

Sat 24/517:35STL - LGW

1 stop34h 35mMultiple Airlines

Deal found 26/4£537

Mon 5/513:30LHR - STL

1 stop13h 28mBritish Airways

Mon 12/519:30STL - LHR

1 stop10h 45mBritish Airways

Deal found 26/4£637

Wed 3/906:15LHR - STL

2 stops20h 08mIberia

Wed 24/914:42STL - LHR

1 stop13h 38mIberia

Deal found 25/4£656

Mon 9/606:40LHR - STL

2 stops20h 54mScandinavian Airlines

Mon 16/613:30STL - LHR

2 stops20h 30mScandinavian Airlines

Deal found 25/4£666

Wed 3/914:50STN - STL

2 stops34h 43mMultiple Airlines

Wed 24/909:15STL - STN

2 stops28h 45mMultiple Airlines

Deal found 26/4£675

Wed 3/919:20LTN - STL

2 stops30h 13mMultiple Airlines

Wed 24/909:15STL - LTN

2 stops31h 40mMultiple Airlines

Deal found 26/4£700

Tue 10/606:55LHR - STL

3 stops19h 03mMultiple Airlines

Tue 17/613:30STL - LHR

2 stops27h 10mMultiple Airlines

Deal found 26/4£714

Sat 3/514:05LHR - STL

1 stop11h 53mLufthansa

Sat 10/516:45STL - LHR

1 stop13h 35mLufthansa

Deal found 26/4£720

Mon 5/509:30LHR - STL

2 stops18h 33mUnited Airlines

Mon 19/510:39STL - LHR

2 stops14h 36mUnited Airlines

Deal found 25/4£743

Mon 5/509:30LHR - STL

2 stops16h 13mAir Canada

Mon 12/513:30STL - LHR

1 stop14h 30mAir Canada

Deal found 25/4£766

Mon 9/608:45LCY - STL

2 stops17h 13mMultiple Airlines

Mon 16/607:30STL - LCY

3 stops23h 00mMultiple Airlines

Deal found 25/4£767

Thu 15/510:40LGW - STL

2 stops19h 11mAmerican Airlines

Sun 18/509:36STL - LGW

2 stops16h 14mAmerican Airlines

Deal found 25/4£821

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 26 April 2025.

Thu 8/514:00LGW - STL

1 stop16h 06mMultiple Airlines

Sat 24/517:35STL - LGW

1 stop34h 35mMultiple Airlines

Deal found 26/4£537

Wed 3/906:15LHR - STL

2 stops20h 08mIberia

Wed 24/914:42STL - LHR

1 stop13h 38mIberia

Deal found 25/4£656

Mon 9/606:40LHR - STL

2 stops20h 54mScandinavian Airlines

Mon 16/613:30STL - LHR

2 stops20h 30mScandinavian Airlines

Deal found 25/4£666

Mon 16/612:30LHR - STL

1 stop13h 49mBritish Airways

Mon 30/617:29STL - LHR

1 stop14h 56mBritish Airways

Deal found 25/4£707

Thu 15/509:30LHR - STL

1 stop16h 28mUnited Airlines

Sun 18/513:30STL - LHR

1 stop14h 30mUnited Airlines

Deal found 25/4£754

Thu 8/517:40LHR - STL

2 stops32h 18mAir Canada

Sat 24/513:30STL - LHR

1 stop11h 00mAir Canada

Deal found 26/4£802

Fri 23/506:30LHR - STL

1 stop13h 00mLufthansa

Fri 30/515:35STL - LHR

2 stops13h 05mLufthansa

Deal found 25/4£819

Thu 15/510:40LGW - STL

2 stops19h 11mAmerican Airlines

Sun 18/509:36STL - LGW

2 stops16h 14mAmerican Airlines

Deal found 25/4£821

Mon 13/1007:40LHR - STL

2 stops16h 23mAer Lingus

Sun 19/1006:35STL - LHR

2 stops22h 35mAer Lingus

Deal found 25/4£899

Mon 9/607:45LCY - STL

2 stops15h 22mKLM

Mon 16/611:17STL - LCY

2 stops14h 53mKLM

Deal found 25/4£972

Tue 10/612:00LGW - STL

2 stops14h 40mDelta

Sun 15/610:30STL - LGW

2 stops17h 30mDelta

Deal found 25/4£1,194

Thu 8/517:15LGW - STL

2 stops27h 32mTurkish Airlines

Sat 24/508:05STL - LGW

2 stops43h 50mTurkish Airlines

Deal found 26/4£1,249

Last-minute flights to St. Charles
Discover last-minute flight deals to St. Charles. Data last updated 26 April 2025 and is based on user searches.

Thu 1/513:25LHR - STL

2 stops16h 08mAer Lingus

Thu 8/513:38STL - LHR

2 stops17h 47mAer Lingus

Deal found 25/4£924

Thu 1/506:40LHR - STL

2 stops22h 56mScandinavian Airlines

Wed 14/515:40STL - LHR

2 stops18h 20mScandinavian Airlines

Deal found 25/4£974

Thu 1/513:30LHR - STL

1 stop13h 28mIberia

Thu 8/519:30STL - LHR

1 stop10h 45mIberia

Deal found 25/4£1,007

Thu 1/511:30LHR - STL

2 stops18h 06mAir France

Thu 8/517:40STL - LHR

1 stop13h 50mAir France

Deal found 25/4£1,071

Thu 1/515:05LGW - STL

2 stops27h 48mMultiple Airlines

Wed 14/507:32STL - LGW

1 stop18h 38mMultiple Airlines

Deal found 25/4£1,178

Sat 3/514:05LHR - STL

1 stop11h 53mLufthansa

Sat 10/516:45STL - LHR

1 stop13h 35mLufthansa

Deal found 26/4£720

Mon 5/513:30LHR - STL

1 stop13h 28mBritish Airways

Mon 12/519:30STL - LHR

1 stop10h 45mBritish Airways

Deal found 26/4£637

Mon 5/510:30LHR - STL

2 stops15h 28mMultiple Airlines

Mon 19/514:30STL - LHR

1 stop15h 20mMultiple Airlines

Deal found 25/4£733

Mon 5/509:30LHR - STL

2 stops18h 33mUnited Airlines

Mon 19/510:39STL - LHR

2 stops14h 36mUnited Airlines

Deal found 25/4£743

Mon 5/509:30LHR - STL

2 stops16h 13mAir Canada

Mon 12/513:30STL - LHR

1 stop14h 30mAir Canada

Deal found 25/4£766

Mon 5/510:40LGW - STL

2 stops19h 11mAmerican Airlines

Mon 19/509:36STL - LGW

2 stops14h 59mAmerican Airlines

Deal found 25/4£909

Mon 5/517:15LGW - STL

2 stops27h 32mTurkish Airlines

Mon 12/515:43STL - LGW

2 stops36h 12mTurkish Airlines

Deal found 25/4£1,399

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 26 April 2025.

Fri 16/514:00LGW - STL

1 stop16h 14mMultiple Airlines

Deal found 25/4£240

Wed 18/606:15LTN - STL

3 stops40h 49mMultiple Airlines

Deal found 26/4£340

Thu 15/514:10LHR - STL

2 stops49h 49mMultiple Airlines

Deal found 25/4£353

Thu 15/522:55STN - STL

3 stops55h 11mMultiple Airlines

Deal found 25/4£358

Fri 16/506:45LCY - STL

3 stops20h 04mMultiple Airlines

Deal found 25/4£567

Thu 15/514:10LHR - STL

3 stops24h 50mWestJet

Deal found 25/4£583

Fri 16/512:30LHR - STL

1 stop14h 28mIberia

Deal found 25/4£655

Fri 23/514:25LHR - STL

1 stop13h 27mFinnair

Deal found 25/4£679

Wed 18/612:00LHR - STL

2 stops17h 54mAer Lingus

Deal found 26/4£724

Thu 10/708:30LHR - STL

1 stop13h 17mLufthansa

Deal found 25/4£880

Thu 15/519:10LCY - STL

1 stop24h 20mLufthansa

Deal found 25/4£931

Fri 20/606:40LHR - STL

2 stops20h 54mScandinavian Airlines

Deal found 25/4£1,347

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

Thu 8/5

14:00-00:06

1 stop16h 06m

Lambert-St Louis

Sat 24/5

17:35-10:10

1 stop34h 35m

£537

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 3/9

06:15-20:23

2 stops20h 08m

Lambert-St Louis

Wed 24/9

14:42-10:20

1 stop13h 38m

£656

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 9/6

06:40-21:34

2 stops20h 54m

Lambert-St Louis

Mon 16/6

13:30-16:00

2 stops20h 30m

£666

LondonSt. Louis

STN - STL

STNSTL

London Stansted

Wed 3/9

14:50-19:33

2 stops34h 43m

Lambert-St Louis

Wed 24/9

09:15-20:00

2 stops28h 45m

£675

LondonSt. Louis

LTN - STL

LTNSTL

London Luton

Wed 3/9

19:20-19:33

2 stops30h 13m

Lambert-St Louis

Wed 24/9

09:15-22:55

2 stops31h 40m

£700

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 16/6

12:30-20:19

1 stop13h 49m

Lambert-St Louis

Mon 30/6

17:29-14:25

1 stop14h 56m

£707

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Tue 10/6

06:55-19:58

3 stops19h 03m

Lambert-St Louis

Tue 17/6

13:30-22:40

2 stops27h 10m

£714

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Thu 15/5

09:30-19:58

1 stop16h 28m

Lambert-St Louis

Sun 18/5

13:30-10:00

1 stop14h 30m

£754

LondonSt. Louis

LCY - STL

LCYSTL

London City

Mon 9/6

08:45-19:58

2 stops17h 13m

Lambert-St Louis

Mon 16/6

07:30-12:30

3 stops23h 00m

£767

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Thu 8/5

17:40-19:58

2 stops32h 18m

Lambert-St Louis

Sat 24/5

13:30-06:30

1 stop11h 00m

£802

Flights are sorted by cheapest return flights first.

Deals found on 25/4

Showing 1-10 of 35 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 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?

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 £681

British Airways

From £837

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

7,920 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

7,920 reviews

Delta

8.0

Very Good

7,920 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

7,920 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

1,272 reviews

Delta

8.0

Very Good

7,920 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

1,444 reviews

Delta

8.0

Very Good

7,920 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

United Airlines

7.4

Good

8,688 reviews

Delta

8.0

Very Good

7,920 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 (12 hours 46 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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£240+ 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 16/5. 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 26 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 26 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 26 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 26 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 18 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 26 April 2025.