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, 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 £233, however they can be found for as little as £183.

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

For those looking to save time traveling to St. Charles, Edinburgh Turnhouse offers the quickest one-way flight (12 hours 30 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).

£391+ Flights to St. Charles

Flights to St. Charles in 2025

Return from	£608
One-way from	£391
Popular in	December
Cheapest in	March
Average price	£853

13/8-4/9
2 total stops
34h 50m total
London to St. Louis

Search Deals

12/8
3 total stops
42h 22m total
London to St. Charles

Search Deals

Highest demand for flights based on searches. 2% potential increase in price (£15 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 4% potential price decrease (£20 potential savings vs. average return price).

Search Deals

Average for return flights in July 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 1 luglio 2025.

mer 13/813:05LGW - STL

1 stop16h 30mMultiple Airlines

gio 4/906:00STL - LGW

1 stop18h 20mMultiple Airlines

Deal found 29/6£608

gio 14/806:55STN - STL

3 stops42h 50mMultiple Airlines

gio 11/914:30STL - STN

3 stops23h 00mMultiple Airlines

Deal found 29/6£610

ven 3/1006:40LHR - STL

2 stops20h 09mScandinavian Airlines

mer 8/1013:30STL - LHR

2 stops23h 00mScandinavian Airlines

Deal found 28/6£615

mer 20/815:05LHR - STL

3 stops28h 27mMultiple Airlines

mer 17/913:30STL - LHR

1 stop11h 00mMultiple Airlines

Deal found 29/6£619

sab 8/1108:00LHR - STL

1 stop14h 22mUnited Airlines

sab 22/1107:00STL - LHR

1 stop17h 20mUnited Airlines

Deal found 28/6£630

gio 21/806:05LTN - STL

3 stops37h 27mMultiple Airlines

dom 31/814:30STL - LTN

3 stops25h 35mMultiple Airlines

Deal found 29/6£641

ven 5/1206:30LHR - STL

1 stop13h 25mLufthansa

ven 12/1217:18STL - LHR

2 stops21h 17mLufthansa

Deal found 28/6£669

mar 25/1113:10LHR - STL

1 stop13h 06mBritish Airways

lun 1/1217:57STL - LHR

1 stop11h 43mBritish Airways

Deal found 28/6£699

dom 24/806:50LHR - STL

2 stops19h 10mAir Canada

mar 9/909:15STL - LHR

2 stops18h 20mAir Canada

Deal found 30/6£718

mar 25/1116:00LHR - STL

1 stop13h 44mAustrian Airlines

lun 1/1211:49STL - LHR

1 stop14h 36mAustrian Airlines

Deal found 28/6£722

gio 4/1209:40LCY - STL

2 stops20h 05mLufthansa

lun 8/1213:27STL - LCY

2 stops21h 13mLufthansa

Deal found 27/6£723

mer 8/1008:40LCY - STL

2 stops17h 55mVirgin Atlantic

mer 22/1014:18STL - LCY

2 stops13h 12mVirgin Atlantic

Deal found 28/6£730

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 1 luglio 2025.

mer 13/813:05LGW - STL

1 stop16h 30mMultiple Airlines

gio 4/906:00STL - LGW

1 stop18h 20mMultiple Airlines

Deal found 29/6£608

gio 16/1006:40LHR - STL

2 stops22h 59mScandinavian Airlines

mar 21/1013:30STL - LHR

2 stops23h 00mScandinavian Airlines

Deal found 30/6£616

lun 8/909:30LHR - STL

1 stop16h 27mLufthansa

ven 19/917:22STL - LHR

1 stop10h 48mLufthansa

Deal found 30/6£682

mar 25/1108:55LHR - STL

2 stops16h 30mUnited Airlines

lun 1/1212:31STL - LHR

1 stop13h 24mUnited Airlines

Deal found 30/6£695

mar 25/1119:25LHR - STL

2 stops34h 19mAustrian Airlines

lun 1/1212:31STL - LHR

2 stops36h 09mAustrian Airlines

Deal found 29/6£697

mar 25/1114:10LHR - STL

1 stop11h 50mBritish Airways

lun 1/1213:55STL - LHR

1 stop12h 20mBritish Airways

Deal found 29/6£699

dom 24/806:50LHR - STL

2 stops19h 10mAir Canada

mar 9/909:15STL - LHR

2 stops18h 20mAir Canada

Deal found 30/6£718

gio 4/1209:20LCY - STL

2 stops17h 15mDelta

lun 8/1206:45STL - LCY

2 stops19h 25mDelta

Deal found 30/6£787

gio 16/1010:45LGW - STL

2 stops59h 03mWestJet

mar 21/1009:00STL - LGW

2 stops42h 25mWestJet

Deal found 30/6£830

gio 16/1008:40LCY - STL

2 stops20h 59mVirgin Atlantic

mar 21/1011:51STL - LCY

2 stops13h 24mVirgin Atlantic

Deal found 30/6£855

mer 13/807:45LCY - STL

2 stops15h 00mKLM

mer 3/911:29STL - LCY

2 stops13h 46mKLM

Deal found 29/6£952

mer 13/820:30LCY - STL

2 stops29h 48mAer Lingus

gio 4/907:23STL - LCY

2 stops19h 12mAer Lingus

Deal found 29/6£1,079

Last-minute flights to St. Charles
Discover last-minute flight deals to St. Charles. Data last updated 1 luglio 2025 and is based on user searches.

ven 4/706:40LHR - STL

2 stops22h 56mScandinavian Airlines

mer 20/813:26STL - LHR

2 stops20h 34mScandinavian Airlines

Deal found 29/6£1,023

mar 8/714:05LHR - STL

2 stops28h 22mAir Canada

dom 20/713:30STL - LHR

1 stop14h 30mAir Canada

Deal found 30/6£873

mar 8/714:05LHR - STL

1 stop12h 45mUnited Airlines

dom 20/713:30STL - LHR

1 stop14h 30mUnited Airlines

Deal found 30/6£874

mer 9/706:30LHR - STL

2 stops16h 38mDelta

dom 20/710:46STL - LHR

2 stops16h 04mDelta

Deal found 29/6£920

mer 9/706:40LHR - STL

3 stops23h 13mScandinavian Airlines

dom 20/715:41STL - LHR

2 stops20h 49mScandinavian Airlines

Deal found 29/6£1,474

lun 14/712:25LHR - STL

1 stop16h 55mAir France

ven 18/715:41STL - LHR

1 stop13h 29mAir France

Deal found 30/6£1,054

dom 20/719:15LCY - STL

3 stops30h 30mMultiple Airlines

dom 3/809:15STL - LCY

2 stops18h 50mMultiple Airlines

Deal found 30/6£1,016

gio 24/709:30LHR - STL

1 stop16h 30mLufthansa

dom 10/811:25STL - LHR

1 stop12h 55mLufthansa

Deal found 30/6£1,065

lun 28/718:00LHR - STL

2 stops28h 31mMultiple Airlines

lun 4/810:47STL - LHR

2 stops18h 38mMultiple Airlines

Deal found 30/6£727

lun 28/716:25LHR - STL

1 stop32h 08mFinnair

lun 4/817:27STL - LHR

1 stop13h 18mFinnair

Deal found 30/6£1,068

lun 28/720:55LHR - STL

2 stops29h 41mVirgin Atlantic

lun 4/810:30STL - LHR

2 stops13h 50mVirgin Atlantic

Deal found 30/6£1,091

mer 30/714:00LGW - STL

1 stop15h 47mMultiple Airlines

mar 5/817:40STL - LGW

1 stop34h 20mMultiple Airlines

Deal found 29/6£720

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 1 luglio 2025.

mar 12/811:25STN - STL

3 stops42h 22mMultiple Airlines

Deal found 29/6£391

mar 12/821:20LGW - STL

3 stops46h 14mMultiple Airlines

Deal found 29/6£416

dom 9/1109:55LHR - STL

3 stops33h 32mMultiple Airlines

Deal found 29/6£427

dom 9/1106:00LTN - STL

3 stops31h 49mMultiple Airlines

Deal found 29/6£461

dom 10/822:00LHR - STL

2 stops28h 18mAer Lingus

Deal found 29/6£708

gio 10/716:00LHR - STL

1 stop13h 35mAustrian Airlines

Deal found 30/6£748

gio 10/706:30LHR - STL

2 stops15h 17mLufthansa

Deal found 30/6£768

lun 14/714:25LHR - STL

1 stop15h 26mIberia

Deal found 30/6£853

dom 6/718:30LHR - STL

2 stops34h 15mTurkish Airlines

Deal found 29/6£881

lun 7/708:20LHR - STL

1 stop16h 13mFinnair

Deal found 29/6£901

dom 10/814:10LHR - STL

2 stops28h 21mWestJet

Deal found 29/6£914

dom 6/717:50LCY - STL

2 stops31h 10mLufthansa

Deal found 29/6£951

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

mer 13/8

13:05-23:35

1 stop16h 30m

Lambert-St Louis

gio 4/9

06:00-06:20

1 stop18h 20m

£608

LondonSt. Louis

STN - STL

STNSTL

London Stansted

gio 14/8

06:55-19:45

3 stops42h 50m

Lambert-St Louis

gio 11/9

14:30-19:30

3 stops23h 00m

£610

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

ven 3/10

06:40-20:49

2 stops20h 09m

Lambert-St Louis

mer 8/10

13:30-18:30

2 stops23h 00m

£615

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

mer 20/8

15:05-13:32

3 stops28h 27m

Lambert-St Louis

mer 17/9

13:30-06:30

1 stop11h 00m

£619

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

sab 8/11

08:00-16:22

1 stop14h 22m

Lambert-St Louis

sab 22/11

07:00-06:20

1 stop17h 20m

£630

LondonSt. Louis

LTN - STL

LTNSTL

London Luton

gio 21/8

06:05-13:32

3 stops37h 27m

Lambert-St Louis

dom 31/8

14:30-22:05

3 stops25h 35m

£641

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

ven 5/12

06:30-13:55

1 stop13h 25m

Lambert-St Louis

ven 12/12

17:18-20:35

2 stops21h 17m

£669

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

mar 25/11

13:10-20:16

1 stop13h 06m

Lambert-St Louis

lun 1/12

17:57-11:40

1 stop11h 43m

£699

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

dom 24/8

06:50-20:00

2 stops19h 10m

Lambert-St Louis

mar 9/9

09:15-09:35

2 stops18h 20m

£718

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

mar 25/11

16:00-23:44

1 stop13h 44m

Lambert-St Louis

lun 1/12

11:49-08:25

1 stop14h 36m

£722

Flights are sorted by cheapest return flights first.

Deals found on 29/6

Showing 1-10 of 36 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 21 hours 51 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.

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

The cheapest airlines flying from London to St. Charles are American Airlines, Scandinavian Airlines and Finnair.

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 through reviews of airlines serving the United States, such as Delta, KLM, andAustrian Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very Good

7,973 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Delta

8.0

Very Good

7,973 reviews

Delta

8.0

Very Good

7,973 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

KLM

7.8

Good

1,366 reviews

Delta

8.0

Very Good

7,973 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Austrian Airlines

7.6

Good

807 reviews

Delta

8.0

Very Good

7,973 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Finnair

7.6

Good

1,301 reviews

Delta

8.0

Very Good

7,973 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

United Airlines

7.4

Good

8,852 reviews

Delta

8.0

Very Good

7,973 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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 £233, however they can be found for as little as £183.
Where does the fastest flight to St. Charles depart from?
For those looking to save time traveling to St. Charles, Edinburgh Turnhouse offers the quickest one-way flight (12 hours 30 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

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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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£391+ 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 12/8. 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 1 luglio 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 1 luglio 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 1 luglio 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 1 luglio 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 27 June 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 through reviews of airlines serving the United States, such as Delta, KLM, andAustrian Airlines. Reviews also offer insight into each airline's 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 1 luglio 2025.