Find flights
Deals
Airlines

£264+ 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 27/4. Fares are subject to change and may not be available on all flights or dates of travel.
— STL
12 Apr — 19 Apr1
1 adult
1 adult, Economy, 0 bags

Flights to St. Charles in 2026

Enter your travel dates to find the best prices.

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 March 2026.

Wed 13/512:00
LHR
-
STL
1 stop13h 30m
American Airlines
Sat 23/513:45
STL
-
LHR
1 stop14h 45m
American Airlines
Deal found 12/3£498
Wed 13/509:20
LHR
-
STL
1 stop14h 26m
Delta
Wed 27/516:20
STL
-
LHR
1 stop12h 00m
Delta
Deal found 12/3£513
Thu 14/509:15
LHR
-
STL
1 stop16h 16m
American Airlines
Wed 27/514:36
STL
-
LHR
1 stop13h 54m
American Airlines
Deal found 12/3£514
Fri 15/516:25
LHR
-
STL
Nonstop9h 05m
British Airways
Wed 27/521:35
STL
-
LHR
Nonstop8h 00m
British Airways
Deal found 12/3£518
Thu 14/509:45
LHR
-
STL
1 stop15h 48m
American Airlines
Sat 23/513:45
STL
-
LHR
1 stop14h 45m
American Airlines
Deal found 12/3£521
Wed 13/516:25
LHR
-
STL
Nonstop9h 05m
British Airways
Wed 27/521:35
STL
-
LHR
Nonstop8h 00m
British Airways
Deal found 12/3£522
Wed 13/512:15
LHR
-
STL
1 stop16h 04m
American Airlines
Sun 24/511:18
STL
-
LHR
1 stop14h 32m
American Airlines
Deal found 12/3£525
Wed 13/509:20
LHR
-
STL
1 stop12h 50m
Delta
Mon 25/510:15
STL
-
LHR
1 stop14h 55m
Delta
Deal found 12/3£529
Thu 14/509:20
LHR
-
STL
1 stop12h 50m
Delta
Tue 26/510:15
STL
-
LHR
1 stop14h 55m
Delta
Deal found 12/3£536
Tue 19/509:45
LHR
-
STL
1 stop12h 15m
American Airlines
Wed 27/514:36
STL
-
LHR
1 stop13h 54m
American Airlines
Deal found 12/3£536
Tue 19/516:25
LHR
-
STL
Nonstop9h 05m
British Airways
Wed 27/521:35
STL
-
LHR
Nonstop8h 00m
British Airways
Deal found 12/3£539
Sat 16/512:00
LHR
-
STL
1 stop13h 30m
American Airlines
Tue 26/513:45
STL
-
LHR
1 stop14h 45m
American Airlines
Deal found 12/3£543

Find flight deals to St. Charles

Find the latest flights to St. Charles in 2026, 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 March 2026.

Return from

£498

One-way from

£264

Popular in

August

Cheapest in

March

Average price

£681
American Airlines
  • American Airlines
  • 13/5-23/5
  • 2 total stops
  • 28h 15m total
  • London to St. Louis
Search Deals
27/4
  • 27/4
  • 2 total stops
  • 46h 50m total
  • London to St. Charles
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (£66 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£12 potential savings vs. average return price).
Search Deals
Average for return flights in March 2026
Search Deals

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 March 2026.
Use the filters below to find and compare flights to St. Charles that are best for you.

Fly from

Route

Depart

Return

Price

Cheapest return flight

LondonSt. Louis

LGW - STL

LGWSTL

London Gatwick

Sat 25/4

14:00-23:19

1 stop15h 19m

Lambert-St Louis

Thu 30/4

11:21-06:20

2 stops36h 59m

£577

LondonSt. Louis

LGW - STL

LGWSTL

London Gatwick

Wed 22/4

14:00-23:19

1 stop15h 19m

Lambert-St Louis

Wed 29/4

20:23-06:20

2 stops27h 57m

£583

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 27/4

09:45-16:00

1 stop12h 15m

Lambert-St Louis

Mon 4/5

18:55-12:50

1 stop11h 55m

£592

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 2/9

06:30-16:49

2 stops16h 19m

Lambert-St Louis

Wed 23/9

13:30-10:20

2 stops14h 50m

£595

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 27/4

08:40-20:44

2 stops18h 04m

Lambert-St Louis

Mon 4/5

09:59-07:15

1 stop15h 16m

£613

LondonSt. Louis

LGW - STL

LGWSTL

London Gatwick

Sat 25/4

14:00-23:19

1 stop15h 19m

Lambert-St Louis

Fri 1/5

20:23-06:20

2 stops27h 57m

£613

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Fri 1/5

14:25-22:59

1 stop14h 34m

Lambert-St Louis

Mon 4/5

14:33-07:40

1 stop11h 07m

£619

LondonSt. Louis

LGW - STL

LGWSTL

London Gatwick

Tue 7/4

14:00-23:25

1 stop15h 25m

Lambert-St Louis

Tue 5/5

16:55-10:00

1 stop35h 05m

£624

LondonSt. Louis

LCY - STL

LCYSTL

London City

Thu 30/4

13:35-19:29

2 stops35h 54m

Lambert-St Louis

Mon 4/5

14:33-13:20

2 stops16h 47m

£643

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 22/4

11:45-23:36

2 stops17h 51m

Lambert-St Louis

Fri 1/5

11:42-10:20

2 stops16h 38m

£646

Flights are sorted by cheapest return flights first.

Deals found on 8/3

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
...
6

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?

Use this chart to determine the optimal time to book a return flight from London to St. Charles. Price data was last updated on 6 March 2026.

To ensure you get the cheapest price possible for a flight to St. Charles, you should look to book at least 48 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 18 hours 0 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.

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

The most popular airlines flying from London to St. Charles are British Airways, Finnair and Lufthansa.

British Airways
British Airways
From £480
Virgin Atlantic
Virgin Atlantic
From £512
United Airlines
United Airlines
From £474
Finnair
Finnair
From £538

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

The cheapest airlines flying from London to St. Charles are American Airlines, United Airlines 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 13 March 2026.
Read through reviews of airlines serving the United States, such as Finnair,Virgin Atlantic, andUnited Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Finnair
7.6
Good
1,371 reviews
Check prices

Comfort

7.5

Entertainment

6.9

Crew

8.2

Boarding

7.7

Food

6.7

Overall

7.6

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights
Finnair
7.6
Good
1,371 reviews
Finnair
7.6
Good
1,371 reviews
Check prices

Comfort

7.5

Entertainment

6.9

Crew

8.2

Boarding

7.7

Food

6.7

Overall

7.6

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights
Virgin Atlantic
7.5
Good
680 reviews
Finnair
7.6
Good
1,371 reviews
Check prices

Comfort

7.5

Entertainment

6.9

Crew

8.2

Boarding

7.7

Food

6.7

Overall

7.6

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights
United Airlines
7.4
Good
9,421 reviews
Finnair
7.6
Good
1,371 reviews
Check prices

Comfort

7.5

Entertainment

6.9

Crew

8.2

Boarding

7.7

Food

6.7

Overall

7.6

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights
Air Canada
7.1
Good
10,800 reviews
Finnair
7.6
Good
1,371 reviews
Check prices

Comfort

7.5

Entertainment

6.9

Crew

8.2

Boarding

7.7

Food

6.7

Overall

7.6

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights
British Airways
6.7
Okay
7,784 reviews
Finnair
7.6
Good
1,371 reviews
Check prices

Comfort

7.5

Entertainment

6.9

Crew

8.2

Boarding

7.7

Food

6.7

Overall

7.6

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights

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.

  • 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 (9 hours 5 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. 3-bedroom building in serene Saint Ann with WiFi, AC 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

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.
First Class
Business Class
Premium Economy Class
Economy 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?

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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.