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Cheap flights from London to St. Louis from $316

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 2/9. 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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Find the cheapest flights from London to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
7:25 am - 5:43 pm
LHR
-
STL
16h 18m1 stop
United Airlines Logo
11:20 am - 5:55 am
STL
-
LHR
12h 35m1 stop
$471United Airlines
mar., ene. 20 - mié., feb. 4
United Airlines Logo
12:15 pm - 7:22 pm
LHR
-
STL
13h 07m1 stop
United Airlines Logo
6:49 pm - 11:45 am
STL
-
LHR
10h 56m1 stop
$483United Airlines
vie., abr. 24 - lun., may. 4
Multiple Airlines Logo
2:00 pm - 11:11 am
LGW
-
STL
27h 11m1 stop
Multiple Airlines Logo
5:42 pm - 10:00 am
STL
-
LGW
34h 18m1 stop
$550Multiple Airlines
vie., ene. 23 - jue., feb. 5
Multiple Airlines Logo
2:00 pm - 11:33 pm
LGW
-
STL
15h 33m1 stop
Multiple Airlines Logo
5:42 pm - 10:00 am
STL
-
LGW
34h 18m1 stop
$551Multiple Airlines
vie., ene. 23 - jue., feb. 5
Multiple Airlines Logo
9:00 am - 3:29 pm
LHR
-
STL
36h 29m2 stops
Multiple Airlines Logo
1:11 pm - 7:55 am
STL
-
LHR
12h 44m1 stop
$588Multiple Airlines
mar., feb. 17 - mar., feb. 24
Lufthansa Logo
6:30 am - 1:55 pm
LHR
-
STL
13h 25m1 stop
Lufthansa Logo
1:15 pm - 5:55 am
STL
-
LHR
10h 40m1 stop
$598Lufthansa
vie., ene. 23 - jue., feb. 5
British Airways Logo
3:30 pm - 10:44 pm
LCY
-
STL
37h 14m2 stops
British Airways Logo
3:54 pm - 8:50 am
STL
-
LCY
34h 56m2 stops
$711British Airways
dom., feb. 1 - dom., feb. 8
British Airways Logo
8:40 am - 11:04 pm
LCY
-
STL
19h 24m2 stops
British Airways Logo
2:00 pm - 4:25 pm
STL
-
LCY
21h 25m2 stops
$738British Airways
jue., mar. 19 - jue., mar. 26
Iberia Logo
7:50 am - 9:12 pm
LCY
-
STL
19h 22m2 stops
Iberia Logo
10:37 am - 2:35 pm
STL
-
LCY
21h 58m2 stops
$752Iberia
jue., feb. 19 - lun., feb. 23
Iberia Logo
7:50 am - 9:12 pm
LCY
-
STL
19h 22m2 stops
Iberia Logo
2:19 pm - 2:35 pm
STL
-
LCY
18h 16m2 stops
$777Iberia
jue., feb. 19 - lun., feb. 23

British Airways flights from London to St. Louis

Our best British Airways deals on London to St. Louis flight tickets
British Airways
Mar 18
LHR6:15 amLondon Heathrow
19h 56m
2 stops
STL9:11 pmLambert-St Louis
Mar 26
STL6:57 pmLambert-St Louis
12h 03m
1 stop
LHR12:00 pmLondon Heathrow
$608
Find similar
British Airways
Apr 15
LHR12:00 pmLondon Heathrow
13h 30m
1 stop
STL7:30 pmLambert-St Louis
Apr 19
STL10:00 pmLambert-St Louis
8h 05m
LHR12:05 pmLondon Heathrow
$671
Find similar
British Airways
Feb 1
LCY3:30 pmLondon City
37h 14m
2 stops
STL10:44 pmLambert-St Louis
Feb 8
STL3:54 pmLambert-St Louis
34h 56m
2 stops
LCY8:50 amLondon City
$711
Find similar

Lufthansa flights from London to St. Louis

Our best Lufthansa deals on London to St. Louis flight tickets
Lufthansa
Jan 23
LHR6:30 amLondon Heathrow
13h 25m
1 stop
STL1:55 pmLambert-St Louis
Feb 5
STL1:15 pmLambert-St Louis
10h 40m
1 stop
LHR5:55 amLondon Heathrow
$598
Find similar
Lufthansa
Jan 20
LHR7:30 pmLondon Heathrow
24h 25m
1 stop
STL1:55 pmLambert-St Louis
Feb 4
STL6:40 pmLambert-St Louis
10h 35m
1 stop
LHR11:15 amLondon Heathrow
$607
Find similar
Lufthansa
Feb 17
LHR9:30 amLondon Heathrow
20h 35m
2 stops
STL12:05 amLambert-St Louis
Feb 24
STL12:15 pmLambert-St Louis
15h 30m
2 stops
LHR9:45 amLondon Heathrow
$610
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 enero 5, 2026.
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

LHR - STL

LHRSTL

London Heathrow

mar. 1/20

7:25 am-5:43 pm

1 stop16h 18m

Lambert-St Louis

mié. 2/4

11:20 am-5:55 am

1 stop12h 35m

$471

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

vie. 4/24

12:15 pm-7:22 pm

1 stop13h 07m

Lambert-St Louis

lun. 5/4

6:49 pm-11:45 am

1 stop10h 56m

$483

LondonSt. Louis

LGW - STL

LGWSTL

London Gatwick

vie. 1/23

2:00 pm-11:11 am

1 stop27h 11m

Lambert-St Louis

jue. 2/5

5:42 pm-10:00 am

1 stop34h 18m

$550

LondonSt. Louis

LGW - STL

LGWSTL

London Gatwick

vie. 1/23

2:00 pm-11:33 pm

1 stop15h 33m

Lambert-St Louis

jue. 2/5

5:42 pm-10:00 am

1 stop34h 18m

$551

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

mar. 2/17

9:00 am-3:29 pm

2 stops36h 29m

Lambert-St Louis

mar. 2/24

1:11 pm-7:55 am

1 stop12h 44m

$588

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

vie. 1/23

6:30 am-1:55 pm

1 stop13h 25m

Lambert-St Louis

jue. 2/5

1:15 pm-5:55 am

1 stop10h 40m

$598

LondonSt. Louis

LCY - STL

LCYSTL

London City

dom. 2/1

3:30 pm-10:44 pm

2 stops37h 14m

Lambert-St Louis

dom. 2/8

3:54 pm-8:50 am

2 stops34h 56m

$711

LondonSt. Louis

LCY - STL

LCYSTL

London City

jue. 3/19

8:40 am-11:04 pm

2 stops19h 24m

Lambert-St Louis

jue. 3/26

2:00 pm-4:25 pm

2 stops21h 25m

$738

LondonSt. Louis

LCY - STL

LCYSTL

London City

jue. 2/19

7:50 am-9:12 pm

2 stops19h 22m

Lambert-St Louis

lun. 2/23

10:37 am-2:35 pm

2 stops21h 58m

$752

LondonSt. Louis

LCY - STL

LCYSTL

London City

jue. 2/19

7:50 am-9:12 pm

2 stops19h 22m

Lambert-St Louis

lun. 2/23

2:19 pm-2:35 pm

2 stops18h 16m

$777

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 $739. The month of January is another great option to travel to St. Louis, with average flight prices from London averaging around $749.

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 $978 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

Fastest flight time

9h 05m

Direct flights

Mon, Wed, Thu and Sat

Airports in St. Louis

1 airport
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?

  • 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
7,646 reviews
Search British Airways 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
O'Fallon
Maryland Heights
Florissant
Fenton
Collinsville
St. Peters
Wentzville
Alton
Farmington
Clayton
Eureka
Festus
Edwardsville
Glencoe
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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