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 £420, however they can be found for as little as £276.

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 7 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).

£300+ Flights to St. Charles

Flights to St. Charles in 2025

Return from	£613
One-way from	£300
Popular in	December
Cheapest in	March
Average price	£680

9/7-16/7
2 total stops
32h 23m total
London to St. Louis

Search Deals

25/6
3 total stops
39h 24m total
London to St. Charles

Search Deals

Highest demand for flights based on searches. 3% potential increase in price (£18 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 4% potential price decrease (£21 potential savings vs. average return price).

Search Deals

Average for return flights in June 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 13 June 2025.

Wed 9/714:00LGW - STL

1 stop15h 47mMultiple Airlines

Wed 16/711:24STL - LGW

1 stop16h 36mMultiple Airlines

Deal found 11/6£613

Sat 6/906:40LHR - STL

2 stops21h 22mScandinavian Airlines

Sat 20/915:30STL - LHR

2 stops20h 10mScandinavian Airlines

Deal found 13/6£637

Wed 29/1013:35LHR - STL

1 stop14h 12mLufthansa

Sat 1/1111:45STL - LHR

2 stops19h 05mLufthansa

Deal found 11/6£655

Sat 6/916:00LHR - STL

1 stop13h 44mUnited Airlines

Sat 20/909:17STL - LHR

2 stops18h 03mUnited Airlines

Deal found 13/6£659

Wed 9/715:05LHR - STL

3 stops24h 47mMultiple Airlines

Wed 16/711:24STL - LHR

3 stops26h 56mMultiple Airlines

Deal found 11/6£667

Wed 3/909:15LHR - STL

1 stop12h 09mAmerican Airlines

Tue 23/913:59STL - LHR

1 stop13h 06mAmerican Airlines

Deal found 13/6£669

Tue 7/1021:50LTN - STL

2 stops27h 48mMultiple Airlines

Tue 21/1016:05STL - LTN

2 stops14h 30mMultiple Airlines

Deal found 11/6£670

Tue 9/906:10LHR - STL

2 stops21h 43mBritish Airways

Mon 22/907:23STL - LHR

1 stop22h 52mBritish Airways

Deal found 13/6£679

Sat 15/1110:15LHR - STL

1 stop14h 02mFinnair

Sat 29/1113:55STL - LHR

1 stop14h 05mFinnair

Deal found 12/6£705

Fri 12/906:30LHR - STL

2 stops15h 28mDelta

Sat 20/907:20STL - LHR

1 stop17h 55mDelta

Deal found 11/6£728

Sat 15/1109:00LHR - STL

2 stops15h 02mVirgin Atlantic

Fri 21/1110:45STL - LHR

2 stops14h 55mVirgin Atlantic

Deal found 11/6£737

Fri 5/911:45LHR - STL

1 stop13h 16mAir France

Fri 19/916:40STL - LHR

1 stop11h 35mAir France

Deal found 13/6£745

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 13 June 2025.

Wed 9/714:00LGW - STL

1 stop15h 47mMultiple Airlines

Wed 16/711:24STL - LGW

1 stop16h 36mMultiple Airlines

Deal found 11/6£613

Sat 6/906:40LHR - STL

2 stops21h 22mScandinavian Airlines

Sat 20/915:30STL - LHR

2 stops20h 10mScandinavian Airlines

Deal found 13/6£637

Wed 29/1013:35LHR - STL

1 stop14h 12mLufthansa

Sat 1/1111:45STL - LHR

2 stops19h 05mLufthansa

Deal found 11/6£655

Sat 6/916:00LHR - STL

1 stop13h 44mUnited Airlines

Sat 20/909:17STL - LHR

2 stops18h 03mUnited Airlines

Deal found 13/6£659

Wed 3/909:15LHR - STL

1 stop12h 09mAmerican Airlines

Tue 23/913:59STL - LHR

1 stop13h 06mAmerican Airlines

Deal found 13/6£669

Tue 9/906:10LHR - STL

2 stops21h 43mBritish Airways

Mon 22/907:23STL - LHR

1 stop22h 52mBritish Airways

Deal found 13/6£679

Sat 15/1110:15LHR - STL

1 stop14h 02mFinnair

Sat 29/1113:55STL - LHR

1 stop14h 05mFinnair

Deal found 12/6£705

Fri 12/906:30LHR - STL

2 stops15h 28mDelta

Sat 20/907:20STL - LHR

1 stop17h 55mDelta

Deal found 11/6£728

Sat 15/1109:00LHR - STL

2 stops15h 02mVirgin Atlantic

Fri 21/1110:45STL - LHR

2 stops14h 55mVirgin Atlantic

Deal found 11/6£737

Fri 5/911:45LHR - STL

1 stop13h 16mAir France

Fri 19/916:40STL - LHR

1 stop11h 35mAir France

Deal found 13/6£745

Thu 16/1010:45LGW - STL

2 stops40h 05mWestJet

Tue 21/1009:00STL - LGW

2 stops42h 25mWestJet

Deal found 12/6£773

Fri 12/920:40LGW - STL

2 stops31h 16mIberia

Sat 20/917:25STL - LGW

2 stops44h 35mIberia

Deal found 11/6£779

Last-minute flights to St. Charles
Discover last-minute flight deals to St. Charles. Data last updated 13 June 2025 and is based on user searches.

Thu 19/612:40LGW - STL

1 stop29h 56mMultiple Airlines

Wed 2/709:15STL - LGW

2 stops18h 35mMultiple Airlines

Deal found 10/6£710

Thu 19/606:55STN - STL

3 stops35h 41mMultiple Airlines

Wed 2/716:00STL - STN

2 stops18h 20mMultiple Airlines

Deal found 10/6£748

Thu 19/612:00LGW - STL

2 stops17h 51mDelta

Wed 2/710:48STL - LGW

2 stops17h 12mDelta

Deal found 11/6£771

Thu 19/612:00LHR - STL

1 stop13h 35mBritish Airways

Wed 2/719:47STL - LHR

1 stop12h 38mBritish Airways

Deal found 11/6£780

Thu 19/608:40LHR - STL

2 stops18h 00mDelta

Wed 2/707:00STL - LHR

1 stop18h 15mDelta

Deal found 11/6£788

Thu 19/607:05LHR - STL

3 stops20h 29mScandinavian Airlines

Wed 2/713:30STL - LHR

2 stops20h 30mScandinavian Airlines

Deal found 11/6£2,631

Wed 2/708:20LHR - STL

1 stop16h 00mFinnair

Wed 16/712:27STL - LHR

1 stop19h 58mFinnair

Deal found 11/6£818

Mon 7/707:10LHR - STL

2 stops19h 14mBritish Airways

Wed 17/917:25STL - LHR

1 stop12h 50mBritish Airways

Deal found 12/6£771

Mon 7/713:50LHR - STL

2 stops16h 03mVirgin Atlantic

Wed 17/914:18STL - LHR

2 stops14h 12mVirgin Atlantic

Deal found 12/6£839

Wed 9/714:00LGW - STL

1 stop15h 47mMultiple Airlines

Wed 16/711:24STL - LGW

1 stop16h 36mMultiple Airlines

Deal found 11/6£613

Wed 9/715:05LHR - STL

3 stops24h 47mMultiple Airlines

Wed 16/711:24STL - LHR

3 stops26h 56mMultiple Airlines

Deal found 11/6£667

Wed 9/712:00LGW - STL

2 stops17h 53mVirgin Atlantic

Wed 16/710:46STL - LGW

2 stops17h 14mVirgin Atlantic

Deal found 10/6£814

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 13 June 2025.

Wed 25/607:40LGW - STL

3 stops39h 24mMultiple Airlines

Deal found 10/6£300

Wed 25/615:05LHR - STL

3 stops31h 59mMultiple Airlines

Deal found 12/6£313

Wed 25/608:15STN - STL

2 stops34h 21mMultiple Airlines

Deal found 10/6£366

Tue 1/721:50LTN - STL

3 stops49h 14mMultiple Airlines

Deal found 10/6£464

Wed 2/707:00LCY - STL

3 stops19h 30mMultiple Airlines

Deal found 9/6£673

Sun 10/822:00LHR - STL

2 stops28h 19mAer Lingus

Deal found 12/6£704

Thu 10/708:20LHR - STL

1 stop16h 13mFinnair

Deal found 12/6£714

Sat 15/1108:40LCY - STL

2 stops20h 22mVirgin Atlantic

Deal found 10/6£919

Sun 10/817:50LCY - STL

2 stops27h 57mLufthansa

Deal found 12/6£929

Sat 16/812:15LHR - STL

1 stop12h 45mLufthansa

Deal found 11/6£945

Wed 9/709:05LCY - STL

2 stops20h 46mAer Lingus

Deal found 9/6£954

Thu 31/714:00LGW - STL

2 stops38h 45mTurkish Airlines

Deal found 12/6£968

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 9/7

14:00-23:47

1 stop15h 47m

Lambert-St Louis

Wed 16/7

11:24-10:00

1 stop16h 36m

£613

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Sat 6/9

06:40-22:02

2 stops21h 22m

Lambert-St Louis

Sat 20/9

15:30-17:40

2 stops20h 10m

£637

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 29/10

13:35-22:47

1 stop14h 12m

Lambert-St Louis

Sat 1/11

11:45-11:50

2 stops19h 05m

£655

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Sat 6/9

16:00-23:44

1 stop13h 44m

Lambert-St Louis

Sat 20/9

09:17-09:20

2 stops18h 03m

£659

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 9/7

15:05-09:52

3 stops24h 47m

Lambert-St Louis

Wed 16/7

11:24-20:20

3 stops26h 56m

£667

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 3/9

09:15-15:24

1 stop12h 09m

Lambert-St Louis

Tue 23/9

13:59-09:05

1 stop13h 06m

£669

LondonSt. Louis

LTN - STL

LTNSTL

London Luton

Tue 7/10

21:50-19:38

2 stops27h 48m

Lambert-St Louis

Tue 21/10

16:05-12:35

2 stops14h 30m

£670

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Tue 9/9

06:10-21:53

2 stops21h 43m

Lambert-St Louis

Mon 22/9

07:23-12:15

1 stop22h 52m

£679

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Sat 15/11

10:15-18:17

1 stop14h 02m

Lambert-St Louis

Sat 29/11

13:55-10:00

1 stop14h 05m

£705

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Fri 12/9

06:30-15:58

2 stops15h 28m

Lambert-St Louis

Sat 20/9

07:20-07:15

1 stop17h 55m

£728

Flights are sorted by cheapest return flights first.

Deals found on 10/6

Showing 1-10 of 44 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 17 hours 41 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, Finnair and Iberia.

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

7,946 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

7,946 reviews

Delta

8.0

Very Good

7,946 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

1,358 reviews

Delta

8.0

Very Good

7,946 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

1,290 reviews

Delta

8.0

Very Good

7,946 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!

Air France

7.5

Good

1,463 reviews

Delta

8.0

Very Good

7,946 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

8,790 reviews

Delta

8.0

Very Good

7,946 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 £420, however they can be found for as little as £276.
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 7 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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£300+ 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 25/6. 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 13 June 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 13 June 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 13 June 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 13 June 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 9 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 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 13 June 2025.