What airlines fly to St. Louis?

British Airways, United Airlines and American Airlines are the top three most popular airlines that fly to St. Louis from London according to our data. British Airways 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?

British Airways, United Airlines, and Lufthansa 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 February 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.

$379 Cheap Flights from London to St. Louis in 2026

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Find the cheapest flights from London to St. Louis

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

2:00 pm - 11:19 pm

LGW

STL

14h 19m

1 stop

8:02 am - 10:00 am

STL

LGW

20h 58m

1 stop

$593Multiple Airlines

Thu, Mar 12 - Thu, Mar 19

2:00 pm - 1:34 pm

LGW

STL

28h 34m

2 stops

8:02 am - 10:00 am

STL

LGW

20h 58m

1 stop

$636Multiple Airlines

Thu, Mar 12 - Thu, Mar 19

11:30 am - 11:36 pm

LHR

STL

18h 06m

2 stops

1:39 pm - 10:15 am

STL

LHR

15h 36m

2 stops

$681Virgin Atlantic

Mon, Mar 2 - Mon, Mar 16

11:30 am - 11:36 pm

LHR

STL

18h 06m

2 stops

6:59 pm - 9:00 am

STL

LHR

33h 01m

1 stop

$683Virgin Atlantic

Mon, Mar 2 - Mon, Mar 16

1:00 pm - 8:43 pm

LHR

STL

13h 43m

1 stop

1:39 pm - 8:45 am

STL

LHR

14h 06m

1 stop

$695Virgin Atlantic

Mon, Mar 2 - Mon, Mar 16

9:55 am - 4:58 pm

LHR

STL

13h 03m

1 stop

6:08 pm - 11:40 am

STL

LHR

12h 32m

1 stop

$723British Airways

Tue, Mar 3 - Tue, Mar 10

9:55 am - 6:07 pm

LHR

STL

13h 12m

1 stop

10:33 am - 7:00 am

STL

LHR

15h 27m

2 stops

$734Finnair

Wed, Mar 18 - Wed, Mar 25

8:40 am - 11:25 pm

LHR

STL

19h 45m

2 stops

12:04 pm - 6:25 am

STL

LHR

13h 21m

1 stop

$753Delta

Wed, Mar 18 - Wed, Mar 25

9:55 am - 7:30 pm

LHR

STL

14h 35m

1 stop

4:13 pm - 10:00 am

STL

LHR

12h 47m

1 stop

$754British Airways

Wed, Mar 18 - Wed, Mar 25

9:55 am - 9:14 pm

LHR

STL

17h 19m

2 stops

10:43 am - 6:25 am

STL

LHR

13h 42m

1 stop

$768Delta

Mon, May 11 - Thu, May 14

Delta flights from London to St. Louis

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

Delta

Mar 18

LHR8:40 amLondon Heathrow

19h 45m

2 stops

STL11:25 pmLambert-St Louis

Mar 25

STL12:04 pmLambert-St Louis

13h 21m

1 stop

LHR6:25 amLondon Heathrow

$753

Delta

May 11

LHR9:55 amLondon Heathrow

17h 19m

2 stops

STL9:14 pmLambert-St Louis

May 14

STL10:43 amLambert-St Louis

13h 42m

1 stop

LHR6:25 amLondon Heathrow

$768

Delta

May 10

LHR8:40 amLondon Heathrow

38h 36m

2 stops

STL5:16 pmLambert-St Louis

May 13

STL6:57 pmLambert-St Louis

13h 38m

2 stops

LHR2:35 pmLondon Heathrow

$797

United Airlines flights from London to St. Louis

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

United Airlines

Feb 5

LHR11:10 amLondon Heathrow

17h 48m

2 stops

STL10:58 pmLambert-St Louis

Feb 9

STL9:57 amLambert-St Louis

13h 58m

1 stop

LHR5:55 amLondon Heathrow

$1,597

United Airlines

Feb 5

LHR11:10 amLondon Heathrow

17h 48m

2 stops

STL10:58 pmLambert-St Louis

Feb 9

STL5:59 pmLambert-St Louis

11h 06m

1 stop

LHR11:05 amLondon Heathrow

$1,599

Fly from

Fly to

Route

Depart

Return

Price

LondonSt. Louis

LGW - STL

LGWSTL

London Gatwick

Thu 3/12

2:00 pm-11:19 pm

1 stop14h 19m

Lambert-St Louis

Thu 3/19

8:02 am-10:00 am

1 stop20h 58m

$593

LondonSt. Louis

LGW - STL

LGWSTL

London Gatwick

Thu 3/12

2:00 pm-1:34 pm

2 stops28h 34m

Lambert-St Louis

Thu 3/19

8:02 am-10:00 am

1 stop20h 58m

$636

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 3/2

11:30 am-11:36 pm

2 stops18h 06m

Lambert-St Louis

Mon 3/16

1:39 pm-10:15 am

2 stops15h 36m

$681

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 3/2

11:30 am-11:36 pm

2 stops18h 06m

Lambert-St Louis

Mon 3/16

6:59 pm-9:00 am

1 stop33h 01m

$683

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 3/2

1:00 pm-8:43 pm

1 stop13h 43m

Lambert-St Louis

Mon 3/16

1:39 pm-8:45 am

1 stop14h 06m

$695

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Tue 3/3

9:55 am-4:58 pm

1 stop13h 03m

Lambert-St Louis

Tue 3/10

6:08 pm-11:40 am

1 stop12h 32m

$723

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 3/18

9:55 am-6:07 pm

1 stop13h 12m

Lambert-St Louis

Wed 3/25

10:33 am-7:00 am

2 stops15h 27m

$734

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 3/18

8:40 am-11:25 pm

2 stops19h 45m

Lambert-St Louis

Wed 3/25

12:04 pm-6:25 am

1 stop13h 21m

$753

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 3/18

9:55 am-7:30 pm

1 stop14h 35m

Lambert-St Louis

Wed 3/25

4:13 pm-10:00 am

1 stop12h 47m

$754

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 5/11

9:55 am-9:14 pm

2 stops17h 19m

Lambert-St Louis

Thu 5/14

10:43 am-6:25 am

1 stop13h 42m

$768

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

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

In general, March 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 $726. The month of January is another great option to travel to St. Louis, with average flight prices from London averaging around $753.

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 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 $975 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 $819 on momondo.

What cabin class options are available on London to Lambert-St Louis flights?

There are 2 cabin classes available to choose from on London to Lambert-St Louis flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

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 February 2026, prices for London to St. Louis flights are approximately 26% 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	$446
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 $446. The best round-trip flight deal from London to St. Louis found on momondo in the last 72 hours is $803.

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

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 February 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 (99.29% of total bookings). The next most popular plane model is Boeing 787-9 Dreamliner (0.71%).
What is the most popular airline from London to St. Louis?
Based on momondo bookings for flights between London and St. Louis, the leading airline is British Airways, making up 100% of the total bookings.

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 7,712 reviews	Search British Airways flights
United Airlines	PriceFrom $654	Free Cancellation	Rating 7.4 9,236 reviews	Search United Airlines flights
American Airlines	PriceFrom $692	Free Cancellation	Rating 7.2 11,216 reviews	Search American Airlines flights

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Clayton

Edwardsville

Eureka

Festus

Litchfield

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Shrewsbury

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.