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Cheap flights from London to St. Louis from $588

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 3/23. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
2:00 pm - 10:33 pmLGW-STL
14h 33m1 stop
Multiple Airlines Logo
8:45 am - 10:00 amSTL-LGW
19h 15m1 stop
$702Multiple Airlines
Find Deal
vie., ene. 9 - lun., ene. 12
Multiple Airlines Logo
2:00 pm - 10:33 pmLGW-STL
14h 33m1 stop
Multiple Airlines Logo
8:45 am - 10:00 amSTL-LGW
19h 15m1 stop
$707Multiple Airlines
Find Deal
sáb., ene. 10 - vie., ene. 16
British Airways Logo
11:45 am - 6:37 pmLHR-STL
12h 52m1 stop
British Airways Logo
3:43 pm - 8:15 amSTL-LHR
10h 32m1 stop
$726British Airways
Find Deal
lun., nov. 17 - lun., dic. 1
British Airways Logo
9:55 am - 6:25 pmLHR-STL
14h 30m1 stop
British Airways Logo
6:45 pm - 9:15 amSTL-LHR
32h 30m1 stop
$727British Airways
Find Deal
lun., nov. 24 - dom., nov. 30
Delta Logo
11:45 am - 8:46 pmLHR-STL
15h 01m2 stops
Delta Logo
9:30 am - 9:00 amSTL-LHR
17h 30m1 stop
$732Delta
Find Deal
lun., nov. 24 - lun., dic. 8
Delta Logo
11:45 am - 11:44 pmLHR-STL
17h 59m2 stops
Delta Logo
12:49 pm - 7:05 amSTL-LHR
12h 16m1 stop
$733Delta
Find Deal
lun., nov. 17 - lun., dic. 1
American Airlines Logo
12:30 pm - 12:11 pmLGW-STL
29h 41m2 stops
American Airlines Logo
7:05 pm - 7:30 amSTL-LGW
31h 25m2 stops
$734American Airlines
Find Deal
jue., mar. 5 - lun., mar. 9
Virgin Atlantic Logo
12:30 pm - 9:02 pmLHR-STL
14h 32m1 stop
Virgin Atlantic Logo
2:38 pm - 8:45 amSTL-LHR
12h 07m1 stop
$740Virgin Atlantic
Find Deal
jue., dic. 4 - jue., dic. 11
Virgin Atlantic Logo
11:05 am - 11:23 pmLHR-STL
18h 18m1 stop
Virgin Atlantic Logo
11:40 am - 7:50 amSTL-LHR
14h 10m2 stops
$750Virgin Atlantic
Find Deal
lun., nov. 24 - lun., dic. 8
American Airlines Logo
10:35 am - 8:32 pmLHR-STL
15h 57m1 stop
American Airlines Logo
11:06 am - 6:55 amSTL-LHR
13h 49m1 stop
$759American Airlines
Find Deal
mié., ene. 7 - jue., ene. 15

British Airways flights from London to St. Louis

Our best British Airways deals on London to St. Louis flight tickets
British Airways
Nov 17
LHR11:45 amLondon Heathrow
12h 52m
1 stop
STL6:37 pmLambert-St Louis
Dec 1
STL3:43 pmLambert-St Louis
10h 32m
1 stop
LHR8:15 amLondon Heathrow
$726
Find similar
British Airways
Nov 24
LHR9:55 amLondon Heathrow
14h 30m
1 stop
STL6:25 pmLambert-St Louis
Nov 30
STL6:45 pmLambert-St Louis
32h 30m
1 stop
LHR9:15 amLondon Heathrow
$727
Find similar
British Airways
Nov 20
LHR2:45 pmLondon Heathrow
15h 20m
1 stop
STL12:05 amLambert-St Louis
Dec 8
STL5:58 pmLambert-St Louis
12h 02m
1 stop
LHR12:00 pmLondon Heathrow
$743
Find similar

Delta flights from London to St. Louis

Our best Delta deals on London to St. Louis flight tickets
Delta
Nov 24
LHR11:45 amLondon Heathrow
15h 01m
2 stops
STL8:46 pmLambert-St Louis
Dec 8
STL9:30 amLambert-St Louis
17h 30m
1 stop
LHR9:00 amLondon Heathrow
$732
Find similar
Delta
Nov 17
LHR11:45 amLondon Heathrow
17h 59m
2 stops
STL11:44 pmLambert-St Louis
Dec 1
STL12:49 pmLambert-St Louis
12h 16m
1 stop
LHR7:05 amLondon Heathrow
$733
Find similar
Delta
Nov 24
LHR6:20 amLondon Heathrow
16h 13m
2 stops
STL4:33 pmLambert-St Louis
Apr 30
STL1:30 pmLambert-St Louis
11h 00m
1 stop
LHR6:30 amLondon Heathrow
$738
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from London to St. Louis that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated octubre 22, 2025.
Use the filters below to find and compare flights from London to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonSt. Louis

LGW - STL

LGWSTL

London Gatwick

vie. 1/9

2:00 pm-10:33 pm

1 stop14h 33m

Lambert-St Louis

lun. 1/12

8:45 am-10:00 am

1 stop19h 15m

$702

LondonSt. Louis

LGW - STL

LGWSTL

London Gatwick

sáb. 1/10

2:00 pm-10:33 pm

1 stop14h 33m

Lambert-St Louis

vie. 1/16

8:45 am-10:00 am

1 stop19h 15m

$707

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

lun. 11/17

11:45 am-6:37 pm

1 stop12h 52m

Lambert-St Louis

lun. 12/1

3:43 pm-8:15 am

1 stop10h 32m

$726

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

lun. 11/24

9:55 am-6:25 pm

1 stop14h 30m

Lambert-St Louis

dom. 11/30

6:45 pm-9:15 am

1 stop32h 30m

$727

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

lun. 11/24

11:45 am-8:46 pm

2 stops15h 01m

Lambert-St Louis

lun. 12/8

9:30 am-9:00 am

1 stop17h 30m

$732

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

lun. 11/17

11:45 am-11:44 pm

2 stops17h 59m

Lambert-St Louis

lun. 12/1

12:49 pm-7:05 am

1 stop12h 16m

$733

LondonSt. Louis

LGW - STL

LGWSTL

London Gatwick

jue. 3/5

12:30 pm-12:11 pm

2 stops29h 41m

Lambert-St Louis

lun. 3/9

7:05 pm-7:30 am

2 stops31h 25m

$734

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

jue. 12/4

12:30 pm-9:02 pm

1 stop14h 32m

Lambert-St Louis

jue. 12/11

2:38 pm-8:45 am

1 stop12h 07m

$740

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

lun. 11/24

11:05 am-11:23 pm

1 stop18h 18m

Lambert-St Louis

lun. 12/8

11:40 am-7:50 am

2 stops14h 10m

$750

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

mié. 1/7

10:35 am-8:32 pm

1 stop15h 57m

Lambert-St Louis

jue. 1/15

11:06 am-6:55 am

1 stop13h 49m

$759

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to St. Louis from

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

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 $740. 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 day to depart on your flight to St. Louis?

The cheapest day to depart on your flight to St. Louis is on a Wednesday when prices can be found for as low as $952. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $1,371. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.

What is the cheapest time of day to depart on your flight to St. Louis?

Flying to St. Louis from London at noon is the least expensive time of day to depart. momondo users have found prices as low as $1,075 when looking at flights departing at noon. In the morning is when there is more demand to fly to St. Louis, so prices are often more expensive at around $1,229 per ticket.

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 $875 on momondo.

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

There is only 1 cabin class 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 October 2025, prices for London to St. Louis flights are approximately 27% more expensive 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

Direct flights

None
There are no direct flights from London to St. Louis. There are no popular flight routes from London to St. Louis.
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 12h 31m.

  • 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?

  • 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?

  • What is the most popular airline 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
Airline
Rating
Free Cancellation
Price
British AirwaysPriceFrom $555Free CancellationRating
6.7
7,466 reviews
Search British Airways flights
LufthansaPriceFrom $925Free CancellationRating
6.8
7,507 reviews
Search Lufthansa flights

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles
Chesterfield
Hermann
Fairview Heights
Florissant
Maryland Heights
O'Fallon
Wentzville
Collinsville
Fenton
St. Peters
Alton
Farmington
Festus
Glencoe
Clayton
Edwardsville
Eureka
Litchfield
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.

An easier way to manage your St. Louis trip

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