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

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 2 operators available for flights from London to Lambert-St Louis Airport as of January 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.

$285 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 $708 to $952. The lowest price recently found on this route was $580.

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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.

6:30 am - 1:55 pm

LHR

STL

13h 25m

1 stop

5:41 pm - 10:25 am

STL

LHR

11h 44m

1 stop

$580Lufthansa

dom., mar. 1 - lun., mar. 9

6:30 am - 1:55 pm

LHR

STL

13h 25m

1 stop

7:00 pm - 3:50 pm

STL

LHR

15h 50m

2 stops

$600Lufthansa

dom., mar. 1 - lun., mar. 9

9:00 am - 7:14 pm

LHR

STL

16h 14m

2 stops

9:55 am - 6:40 am

STL

LHR

14h 45m

2 stops

$605United Airlines

mar., feb. 24 - mar., mar. 3

6:30 am - 1:55 pm

LHR

STL

13h 25m

1 stop

11:25 am - 8:25 am

STL

LHR

16h 00m

2 stops

$606United Airlines

dom., mar. 1 - lun., mar. 9

6:30 am - 7:14 pm

LHR

STL

18h 44m

2 stops

11:25 am - 6:40 am

STL

LHR

14h 15m

2 stops

$611United Airlines

dom., mar. 1 - lun., mar. 9

11:45 am - 6:52 pm

LHR

STL

13h 07m

1 stop

6:18 pm - 12:15 pm

STL

LHR

11h 57m

1 stop

$618British Airways

mar., feb. 24 - mar., mar. 3

6:30 am - 1:25 pm

LHR

STL

12h 55m

1 stop

1:00 pm - 6:30 am

STL

LHR

11h 30m

1 stop

$621Multiple Airlines

dom., may. 3 - vie., may. 8

6:00 am - 8:05 pm

LHR

STL

20h 05m

2 stops

1:00 pm - 6:30 am

STL

LHR

11h 30m

1 stop

$625Air Canada

dom., may. 3 - vie., may. 8

2:00 pm - 7:22 am

LGW

STL

22h 22m

1 stop

8:02 am - 10:00 am

STL

LGW

20h 58m

1 stop

$648Multiple Airlines

jue., mar. 12 - jue., mar. 19

7:50 am - 9:11 pm

LCY

STL

18h 21m

2 stops

2:00 pm - 2:05 pm

STL

LCY

19h 05m

2 stops

$708British Airways

jue., mar. 12 - jue., mar. 19

United Airlines flights from London to St. Louis

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

United Airlines

Feb 24

LHR9:00 amLondon Heathrow

16h 14m

2 stops

STL7:14 pmLambert-St Louis

Mar 3

STL9:55 amLambert-St Louis

14h 45m

2 stops

LHR6:40 amLondon Heathrow

$605

United Airlines

Mar 1

LHR6:30 amLondon Heathrow

18h 44m

2 stops

STL7:14 pmLambert-St Louis

Mar 9

STL11:25 amLambert-St Louis

14h 15m

2 stops

LHR6:40 amLondon Heathrow

$611

United Airlines

Feb 5

LHR6:50 amLondon Heathrow

15h 13m

2 stops

STL4:03 pmLambert-St Louis

Feb 9

STL9:57 amLambert-St Louis

13h 58m

1 stop

LHR5:55 amLondon Heathrow

$613

British Airways flights from London to St. Louis

Our best British Airways deals on London to St. Louis flight tickets

British Airways

Feb 24

LHR11:45 amLondon Heathrow

13h 07m

1 stop

STL6:52 pmLambert-St Louis

Mar 3

STL6:18 pmLambert-St Louis

11h 57m

1 stop

LHR12:15 pmLondon Heathrow

$618

British Airways

May 4

LHR2:45 pmLondon Heathrow

13h 29m

1 stop

STL10:14 pmLambert-St Louis

Oct 18

STL9:40 pmLambert-St Louis

8h 00m

LHR11:40 amLondon Heathrow

$703

British Airways

May 3

LHR9:45 amLondon Heathrow

12h 31m

1 stop

STL4:16 pmLambert-St Louis

May 8

STL9:35 pmLambert-St Louis

8h 00m

LHR11:35 amLondon Heathrow

$718

Fly from

Fly to

Route

Depart

Return

Price

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

dom. 3/1

6:30 am-1:55 pm

1 stop13h 25m

Lambert-St Louis

lun. 3/9

5:41 pm-10:25 am

1 stop11h 44m

$580

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

dom. 3/1

6:30 am-1:55 pm

1 stop13h 25m

Lambert-St Louis

lun. 3/9

7:00 pm-3:50 pm

2 stops15h 50m

$600

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

mar. 2/24

9:00 am-7:14 pm

2 stops16h 14m

Lambert-St Louis

mar. 3/3

9:55 am-6:40 am

2 stops14h 45m

$605

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

dom. 3/1

6:30 am-1:55 pm

1 stop13h 25m

Lambert-St Louis

lun. 3/9

11:25 am-8:25 am

2 stops16h 00m

$606

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

dom. 3/1

6:30 am-7:14 pm

2 stops18h 44m

Lambert-St Louis

lun. 3/9

11:25 am-6:40 am

2 stops14h 15m

$611

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

mar. 2/24

11:45 am-6:52 pm

1 stop13h 07m

Lambert-St Louis

mar. 3/3

6:18 pm-12:15 pm

1 stop11h 57m

$618

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

dom. 5/3

6:30 am-1:25 pm

1 stop12h 55m

Lambert-St Louis

vie. 5/8

1:00 pm-6:30 am

1 stop11h 30m

$621

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

dom. 5/3

6:00 am-8:05 pm

2 stops20h 05m

Lambert-St Louis

vie. 5/8

1:00 pm-6:30 am

1 stop11h 30m

$625

LondonSt. Louis

LGW - STL

LGWSTL

London Gatwick

jue. 3/12

2:00 pm-7:22 am

1 stop22h 22m

Lambert-St Louis

jue. 3/19

8:02 am-10:00 am

1 stop20h 58m

$648

LondonSt. Louis

LCY - STL

LCYSTL

London City

jue. 3/12

7:50 am-9:11 pm

2 stops18h 21m

Lambert-St Louis

jue. 3/19

2:00 pm-2:05 pm

2 stops19h 05m

$708

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

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 $977 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 January 2026, prices for London to St. Louis flights are approximately 3% 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 2 operators available for flights from London to Lambert-St Louis Airport as of January 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 (99.25% of total bookings). The next most popular plane model is Boeing 787-9 Dreamliner (0.75%).
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 7,705 reviews		Search British Airways flights
United Airlines	PriceFrom $654	Free Cancellation	Rating 7.4 9,215 reviews		Search United Airlines flights

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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.