How many flights depart from London to St. Louis on average per day?

The number of flights available between London and St. Louis is 2 per day as of April 2026. The most frequent departure time is 4:00PM, with 100% of daily flights leaving in the afternoon.

How many flights depart from London to St. Louis on average per week?

As of April 2026, 20 flights take off from London and land in St. Louis each week. The most common flight departure day for this route is Tue, with 25% of weekly flights taking off on this day.

What airlines fly to St. Louis?

American Airlines, British Airways and United Airlines are the top three most popular airlines that fly to St. Louis from London according to our data. American Airlines is the first choice among our users, with 37% of people opting to fly with this airline when traveling to St. Louis. Keep in mind that there are 3 different airlines that fly to St. Louis on a routine basis, so you have a few additional options to choose from.

What is the cheapest airline that flies from London to Lambert-St Louis?

Finnair, Lufthansa, and British Airways are the most popular carriers operating from London to Lambert-St Louis

When did momondo last update prices for flights from London to Lambert-St Louis Airport?

Prices for flights from London to Lambert-St Louis Airport are refreshed on a daily basis.

How many operators does momondo search for flights from London to Lambert-St Louis Airport?

There are 3 operators available for flights from London to Lambert-St Louis Airport as of April 2026.

How old do you have to be to fly from London to Lambert-St Louis Airport?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from London to Lambert-St Louis Airport.

What documentation or ID do you need to fly to Lambert-St Louis Airport?

The travel and health documents you'll need for your trip to Lambert-St Louis Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Lambert-St Louis Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$456 Cheap Flights from London to St. Louis in 2026

Q: What is the typical price of a round-trip flight between London and St. Louis?

Prices are currently low for flights on this route. Typical prices usually range from $1,015 to $845. The lowest price recently found on this route was $851.

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Find the cheapest flights from London to St. Louis

Round-trip

One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

4:10 pm - 11:20 pm

LHR

STL

37h 10m

2 stops

12:43 pm - 9:05 am

STL

LHR

14h 22m

1 stop

$851Finnair

Tue, Sep 8 - Tue, Sep 22

2:45 pm - 11:20 pm

LHR

STL

14h 35m

1 stop

12:43 pm - 12:50 pm

STL

LHR

18h 07m

1 stop

$856Finnair

Tue, Sep 15 - Tue, Sep 22

11:45 am - 11:37 pm

LHR

STL

17h 52m

2 stops

7:05 pm - 1:15 pm

STL

LHR

12h 10m

1 stop

$858KLM

Wed, Sep 2 - Wed, Sep 23

10:05 am - 6:15 pm

LHR

STL

14h 10m

1 stop

2:47 pm - 7:40 am

STL

LHR

10h 53m

1 stop

$860American Airlines

Mon, Sep 21 - Wed, Oct 7

7:50 am - 6:59 pm

LHR

STL

17h 09m

2 stops

5:11 pm - 12:50 pm

STL

LHR

13h 39m

1 stop

$868Multiple Airlines

Wed, Sep 2 - Wed, Sep 23

4:25 pm - 7:30 pm

LHR

STL

9h 05mnonstop

12:47 pm - 6:55 am

STL

LHR

12h 08m

1 stop

$870British Airways

Tue, Sep 8 - Tue, Sep 22

4:25 pm - 7:30 pm

LHR

STL

9h 05mnonstop

12:52 pm - 6:55 am

STL

LHR

12h 03m

1 stop

$873British Airways

Tue, Sep 22 - Tue, Oct 6

4:25 pm - 7:30 pm

LHR

STL

9h 05mnonstop

1:00 pm - 6:50 am

STL

LHR

11h 50m

1 stop

$874British Airways

Tue, Sep 22 - Tue, Oct 6

2:00 pm - 11:57 pm

LGW

STL

15h 57m

1 stop

8:08 pm - 10:00 am

STL

LGW

31h 52m

2 stops

$883Multiple Airlines

Mon, Jun 8 - Mon, Jun 15

1:45 pm - 11:59 pm

LCY

STL

16h 14m

2 stops

6:57 pm - 4:40 pm

STL

LCY

15h 43m

2 stops

$1,277KLM

Sun, May 10 - Tue, May 26

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American Airlines flights from London to St. Louis

Our best American Airlines deals on London to St. Louis flight tickets

American Airlines

Sep 21

LHR10:05 amLondon Heathrow

14h 10m

1 stop

STL6:15 pmLambert-St Louis

Oct 7

STL2:47 pmLambert-St Louis

10h 53m

1 stop

LHR7:40 amLondon Heathrow

$860

American Airlines

Sep 22

LHR4:25 pmLondon Heathrow

9h 05m

STL7:30 pmLambert-St Louis

Dec 3

STL2:54 pmLambert-St Louis

10h 06m

1 stop

LHR7:00 amLondon Heathrow

$877

American Airlines

Sep 8

LHR4:25 pmLondon Heathrow

9h 05m

STL7:30 pmLambert-St Louis

Sep 22

STL9:35 pmLambert-St Louis

8h 00m

LHR11:35 amLondon Heathrow

$897

Iberia flights from London to St. Louis

Our best Iberia deals on London to St. Louis flight tickets

Iberia

Sep 20

LHR7:20 pmLondon Heathrow

30h 43m

2 stops

STL8:03 pmLambert-St Louis

Oct 6

STL9:35 pmLambert-St Louis

8h 00m

LHR11:35 amLondon Heathrow

$915

Iberia

Sep 21

LHR6:15 amLondon Heathrow

19h 48m

2 stops

STL8:03 pmLambert-St Louis

Nov 2

STL7:58 pmLambert-St Louis

30h 37m

1 stop

LHR8:35 amLondon Heathrow

$917

Iberia

Sep 25

LHR7:40 pmLondon Heathrow

30h 23m

2 stops

STL8:03 pmLambert-St Louis

Nov 5

STL11:39 amLambert-St Louis

13h 11m

1 stop

LHR6:50 amLondon Heathrow

$955

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Tue 9/8

4:10 pm-11:20 pm

2 stops37h 10m

Lambert-St Louis

Tue 9/22

12:43 pm-9:05 am

1 stop14h 22m

$851

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Tue 9/15

2:45 pm-11:20 pm

1 stop14h 35m

Lambert-St Louis

Tue 9/22

12:43 pm-12:50 pm

1 stop18h 07m

$856

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 9/2

11:45 am-11:37 pm

2 stops17h 52m

Lambert-St Louis

Wed 9/23

7:05 pm-1:15 pm

1 stop12h 10m

$858

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 9/21

10:05 am-6:15 pm

1 stop14h 10m

Lambert-St Louis

Wed 10/7

2:47 pm-7:40 am

1 stop10h 53m

$860

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 9/2

7:50 am-6:59 pm

2 stops17h 09m

Lambert-St Louis

Wed 9/23

5:11 pm-12:50 pm

1 stop13h 39m

$868

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Tue 9/8

4:25 pm-7:30 pm

Nonstop9h 05m

Lambert-St Louis

Tue 9/22

12:47 pm-6:55 am

1 stop12h 08m

$870

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Tue 9/22

4:25 pm-7:30 pm

Nonstop9h 05m

Lambert-St Louis

Tue 10/6

12:52 pm-6:55 am

1 stop12h 03m

$873

Quickest round-trip

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Tue 9/22

4:25 pm-7:30 pm

Nonstop9h 05m

Lambert-St Louis

Tue 10/6

1:00 pm-6:50 am

1 stop11h 50m

$874

LondonSt. Louis

LGW - STL

LGWSTL

London Gatwick

Mon 6/8

2:00 pm-11:57 pm

1 stop15h 57m

Lambert-St Louis

Mon 6/15

8:08 pm-10:00 am

2 stops31h 52m

$883

LondonSt. Louis

LCY - STL

LCYSTL

London City

Sun 5/10

1:45 pm-11:59 pm

2 stops16h 14m

Lambert-St Louis

Tue 5/26

6:57 pm-4:40 pm

2 stops15h 43m

$1,277

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from London to St. Louis

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the typical price of a round-trip flight between London and St. Louis?

What is the cheapest month to fly to St. Louis?

In general, August is the cheapest month to fly from London to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $115. The month of September is another great option to travel to St. Louis, with average flight prices from London averaging around $170.

What is the cheapest London to Lambert-St Louis flight route?

Fly from London Heathrow to Lambert-St Louis for the best London - Lambert-St Louis flight prices

How far in advance should I book a flight from London to St. Louis?

You are more likely to see cheaper flights to St. Louis from London when booking weeks ahead of your departure date. In general, you can expect to find flights to St. Louis for around $990 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to St. Louis from London for as low as $870 on momondo.

Can stopping save me money on London to St. Louis flights?

No. A direct flight is the cheapest option for a flight between London to St. Louis.

How have London to St. Louis flight prices changed over time?

As of April 2026, prices for London to St. Louis flights are approximately 32% cheaper when compared to flights at the same time last year.

When to book flights from London to St. Louis

Are you open to changing your travel dates? Check out the ideal times to fly from London to St. Louis according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap London to St. Louis (LON to STL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London to St. Louis

Best Price Found	$692
Fastest flight time	9h 05m
Direct flights	Mon, Wed, Thu and Sat
Airports in St. Louis	1 airport

The best one-way flight to St. Louis from London in the past 72 hours is $692. The best round-trip flight deal from London to St. Louis found on momondo in the last 72 hours is $998.

The fastest flight from London to St. Louis takes 9h 05m

Direct flights go from London to St. Louis on Monday, Wednesday, Thursday and Saturday. There are no airlines offering direct flights.

There is 1 airport in St. Louis. From London there are direct flights to Lambert-St Louis (STL).

Search flight deals

Frequently asked questions about flying from London to St. Louis

How far is London to Lambert-St Louis by plane?
Lambert-St Louis is 4197.7 mi away from London. By plane, this route typically takes 9h 05m.
When did momondo last update prices for flights from London to Lambert-St Louis Airport?
Prices for flights from London to Lambert-St Louis Airport are refreshed on a daily basis.
How many operators does momondo search for flights from London to Lambert-St Louis Airport?
There are 3 operators available for flights from London to Lambert-St Louis Airport as of April 2026.
How old do you have to be to fly from London to Lambert-St Louis Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from London to Lambert-St Louis Airport.
What documentation or ID do you need to fly to Lambert-St Louis Airport?
The travel and health documents you'll need for your trip to Lambert-St Louis Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Lambert-St Louis Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from London to St. Louis?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from London to St. Louis is Boeing 787-8 Dreamliner (96.82% of total bookings). The next most popular plane models are Embraer 175 (2.80%) and Boeing 787-9 Dreamliner (0.37%).

Best airlines flying from London to St. Louis

Compare and see reviews for airlines that fly from London to St. Louis with momondo

Airline	Rating	Free Cancellation	Price
British Airways	PriceFrom $555	Free Cancellation	Rating 6.7 7,937 reviews	Search British Airways flights
United Airlines	PriceFrom $654	Free Cancellation	Rating 7.4 9,677 reviews	Search United Airlines flights
American Airlines	PriceFrom $692	Free Cancellation	Rating 7.1 11,682 reviews	Search American Airlines flights

American Airlines Flights From London to St. Louis
American Airlines is one of the most popular airlines flying from London to St. Louis, operating 4 flights/week on average for this route. A good American Airlines flight deal for London to St. Louis starts from $692 round-trip, up to an average price of $1,143. Our users have rated American Airlines at 7.1/10.
British Airways Flights From London to St. Louis
Another popular option for London to St. Louis flights is British Airways (6.7/10, 7,937 ratings). British Airways flies from London to St. Louis around 4 times per week, with deals starting from $555 round-trip and rising to an average price of around $869.

St. Charles

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Hermann

Fairview Heights

Maryland Heights

O'Fallon

Florissant

St. Peters

Collinsville

Wentzville

Alton

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Farmington

Festus

Clayton

Eureka

Litchfield

Edwardsville

Shrewsbury

Grafton

Why use momondo?

Why should I use momondo to find a flight deal from London to St. Louis?

Finding the right flight to St. Louis from London is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to St. Louis quick and easy, saving you time and money.

Can I find flights from London to St. Louis with flexible booking policies on momondo?

Yes. All flights to St. Louis from London on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from London to St. Louis?

Once all potential London to St. Louis flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from London to St. Louis right now. Can momondo alert me if prices change?

Price alerts on flights to St. Louis from London are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your St. Louis trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

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Cheap flights from London to St. Louis from $456

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London to St. Louis departing on 5/30. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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American Airlines flights from London to St. Louis

Our best American Airlines deals on London to St. Louis flight tickets

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How to get the cheapest flight ticket from London to St. Louis

What is the typical price of a round-trip flight between London and St. Louis?

What is the cheapest month to fly to St. Louis?

What is the cheapest London to Lambert-St Louis flight route?

How far in advance should I book a flight from London to St. Louis?

Can stopping save me money on London to St. Louis flights?

How have London to St. Louis flight prices changed over time?

What is the cheapest airline that flies from London to Lambert-St Louis?

What airlines fly to St. Louis?

How many flights depart from London to St. Louis on average per day?

How many flights depart from London to St. Louis on average per week?

When to book flights from London to St. Louis

Cheap London to St. Louis (LON to STL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London to St. Louis

Best Price Found

Fastest flight time

Direct flights

Airports in St. Louis

Frequently asked questions about flying from London to St. Louis

Best airlines flying from London to St. Louis

Compare and see reviews for airlines that fly from London to St. Louis with momondo

American Airlines Flights From London to St. Louis

British Airways Flights From London to St. Louis

Traveling to a place near St. Louis?

Why use momondo?

An easier way to manage your St. Louis trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

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