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£288+ 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.
— STL
22 Apr — 29 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 23 March 2026.

Mon 20/413:25
LHR
-
STL
1 stop34h 19m
Virgin Atlantic
Thu 30/413:46
STL
-
LHR
1 stop11h 24m
Virgin Atlantic
Deal found 18/3£571
Mon 20/414:45
LHR
-
STL
1 stop15h 01m
Finnair
Thu 30/412:27
STL
-
LHR
2 stops13h 33m
Finnair
Deal found 19/3£590
Wed 2/910:05
LHR
-
STL
2 stops16h 14m
Finnair
Wed 23/918:51
STL
-
LHR
1 stop13h 34m
Finnair
Deal found 20/3£591
Tue 5/511:00
LHR
-
STL
2 stops17h 19m
Finnair
Tue 12/517:49
STL
-
LHR
2 stops21h 51m
Finnair
Deal found 21/3£592
Wed 2/916:25
LHR
-
STL
Nonstop9h 05m
British Airways
Wed 23/912:47
STL
-
LHR
1 stop12h 08m
British Airways
Deal found 20/3£595
Fri 24/414:00
LGW
-
STL
2 stops22h 50m
Multiple Airlines
Fri 8/516:19
STL
-
LGW
1 stop35h 41m
Multiple Airlines
Deal found 19/3£595
Sun 3/518:10
LHR
-
STL
2 stops34h 07m
Finnair
Sun 10/517:21
STL
-
LHR
2 stops30h 54m
Finnair
Deal found 19/3£595
Thu 30/414:10
LHR
-
STL
2 stops51h 03m
Finnair
Thu 7/511:25
STL
-
LHR
2 stops14h 35m
Finnair
Deal found 18/3£600
Mon 20/412:15
LHR
-
STL
1 stop16h 02m
Multiple Airlines
Mon 4/513:29
STL
-
LHR
1 stop11h 21m
Multiple Airlines
Deal found 18/3£609
Sat 18/414:00
LGW
-
STL
1 stop15h 19m
Multiple Airlines
Sat 25/420:17
STL
-
LGW
2 stops31h 43m
Multiple Airlines
Deal found 21/3£622
Mon 27/414:00
LGW
-
STL
1 stop15h 19m
Multiple Airlines
Fri 1/520:23
STL
-
LGW
2 stops27h 57m
Multiple Airlines
Deal found 21/3£625
Thu 30/417:00
LCY
-
STL
2 stops32h 29m
British Airways
Mon 4/512:27
STL
-
LCY
2 stops18h 53m
British Airways
Deal found 18/3£659

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 23 March 2026.

Return from

£571

One-way from

£289

Popular in

August

Cheapest in

January

Average price

£689
Virgin Atlantic
  • Virgin Atlantic
  • 20/4-30/4
  • 2 total stops
  • 45h 43m total
  • London to St. Louis
Search Deals
13/5
  • 13/5
  • 2 total stops
  • 30h 48m total
  • London to St. Charles
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (£64 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 23 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

Fri 24/4

14:00-06:50

2 stops22h 50m

Lambert-St Louis

Fri 8/5

16:19-10:00

1 stop35h 41m

£595

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 20/4

12:15-22:17

1 stop16h 02m

Lambert-St Louis

Mon 4/5

13:29-06:50

1 stop11h 21m

£609

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 6/5

06:30-17:44

2 stops17h 14m

Lambert-St Louis

Wed 13/5

18:57-14:35

2 stops13h 38m

£632
Fastest return journey

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Fri 1/5

16:25-19:30

Nonstop9h 05m

Lambert-St Louis

Mon 4/5

16:30-10:30

1 stop12h 00m

£642

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Thu 10/9

11:00-22:00

1 stop17h 00m

Lambert-St Louis

Mon 14/9

16:47-09:25

1 stop10h 38m

£658

LondonSt. Louis

LCY - STL

LCYSTL

London City

Thu 30/4

17:00-19:29

2 stops32h 29m

Lambert-St Louis

Mon 4/5

12:27-13:20

2 stops18h 53m

£659

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Fri 17/4

14:45-22:17

1 stop13h 32m

Lambert-St Louis

Fri 24/4

14:12-06:55

1 stop10h 43m

£668

LondonSt. Louis

LGW - STL

LGWSTL

London Gatwick

Wed 15/4

14:00-23:19

1 stop15h 19m

Lambert-St Louis

Fri 24/4

20:23-10:00

2 stops31h 37m

£669

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Thu 7/5

08:40-21:09

2 stops18h 29m

Lambert-St Louis

Thu 14/5

13:27-10:20

2 stops14h 53m

£683

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 15/4

06:30-16:50

2 stops16h 20m

Lambert-St Louis

Fri 24/4

13:46-07:10

1 stop11h 24m

£684

Flights are sorted by cheapest return flights first.

Deals found on 18/3

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 13 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 14 hours 56 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, Lufthansa and United Airlines.

British Airways
British Airways
From £480
Virgin Atlantic
Virgin Atlantic
From £512
United Airlines
United Airlines
From £474
Lufthansa
Lufthansa
From £626

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 23 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
7.7
Good
1,374 reviews
Check prices

Food

6.7

Entertainment

6.9

Boarding

7.7

Comfort

7.5

Crew

8.2

Overall

7.7

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights
Finnair
7.7
Good
1,374 reviews
Finnair
7.7
Good
1,374 reviews
Check prices

Food

6.7

Entertainment

6.9

Boarding

7.7

Comfort

7.5

Crew

8.2

Overall

7.7

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
685 reviews
Finnair
7.7
Good
1,374 reviews
Check prices

Food

6.7

Entertainment

6.9

Boarding

7.7

Comfort

7.5

Crew

8.2

Overall

7.7

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
9,464 reviews
Finnair
7.7
Good
1,374 reviews
Check prices

Food

6.7

Entertainment

6.9

Boarding

7.7

Comfort

7.5

Crew

8.2

Overall

7.7

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
10,835 reviews
Finnair
7.7
Good
1,374 reviews
Check prices

Food

6.7

Entertainment

6.9

Boarding

7.7

Comfort

7.5

Crew

8.2

Overall

7.7

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
7,812 reviews
Finnair
7.7
Good
1,374 reviews
Check prices

Food

6.7

Entertainment

6.9

Boarding

7.7

Comfort

7.5

Crew

8.2

Overall

7.7

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.

  • How much is a return flight to St. Charles?

    A return flight to St. Charles will typically cost around £403, however they can be found for as little as £211.

  • 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

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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.

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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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