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Cheap flights from London to St. Louis from $295

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 1/23. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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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.
Multiple Airlines Logo
2:00 pm - 10:23 am
LGW
-
STL
26h 23m1 stop
Multiple Airlines Logo
10:16 am - 10:00 am
STL
-
LGW
17h 44m1 stop
$511Multiple Airlines
Thu, Jan 22 - Mon, Jan 26
Multiple Airlines Logo
2:00 pm - 6:51 am
LGW
-
STL
22h 51m2 stops
Multiple Airlines Logo
11:18 am - 10:00 am
STL
-
LGW
16h 42m1 stop
$556Multiple Airlines
Fri, Jan 23 - Fri, Jan 30
Multiple Airlines Logo
2:00 pm - 6:51 am
LGW
-
STL
22h 51m2 stops
Multiple Airlines Logo
10:16 am - 10:00 am
STL
-
LGW
17h 44m1 stop
$564Multiple Airlines
Thu, Jan 22 - Mon, Jan 26
British Airways Logo
7:35 am - 6:11 pm
LHR
-
STL
16h 36m2 stops
British Airways Logo
6:57 pm - 12:00 pm
STL
-
LHR
12h 03m1 stop
$703British Airways
Wed, Mar 4 - Mon, Mar 9
Virgin Atlantic Logo
11:05 am - 11:25 pm
LHR
-
STL
18h 20m1 stop
Virgin Atlantic Logo
12:00 pm - 9:00 am
STL
-
LHR
15h 00m1 stop
$722Virgin Atlantic
Tue, Jan 6 - Tue, Jan 13
Virgin Atlantic Logo
11:05 am - 11:23 pm
LHR
-
STL
18h 18m1 stop
Virgin Atlantic Logo
6:59 pm - 9:00 am
STL
-
LHR
33h 01m1 stop
$725Virgin Atlantic
Thu, Mar 5 - Sun, Mar 8
British Airways Logo
7:50 am - 1:54 pm
LCY
-
STL
36h 04m2 stops
British Airways Logo
6:00 am - 2:35 pm
STL
-
LCY
27h 35m2 stops
$741British Airways
Wed, Mar 4 - Mon, Mar 9
Delta Logo
8:00 pm - 11:02 am
LHR
-
STL
21h 02m2 stops
Delta Logo
7:10 am - 6:25 am
STL
-
LHR
17h 15m1 stop
$752Delta
Wed, Jan 7 - Wed, Jan 14
Finnair Logo
5:00 pm - 9:03 am
LHR
-
STL
22h 03m2 stops
Finnair Logo
12:11 pm - 9:40 am
STL
-
LHR
15h 29m2 stops
$756Finnair
Tue, Jan 13 - Fri, Jan 23
Delta Logo
7:45 am - 5:42 pm
LCY
-
STL
15h 57m2 stops
Delta Logo
12:23 pm - 9:30 am
STL
-
LCY
16h 07m2 stops
$848Delta
Fri, Mar 6 - Mon, Mar 9

Virgin Atlantic flights from London to St. Louis

Our best Virgin Atlantic deals on London to St. Louis flight tickets
Virgin Atlantic
Jan 6
LHR11:05 amLondon Heathrow
18h 20m
1 stop
STL11:25 pmLambert-St Louis
Jan 13
STL12:00 pmLambert-St Louis
15h 00m
1 stop
LHR9:00 amLondon Heathrow
$722
Find similar
Virgin Atlantic
Mar 5
LHR11:05 amLondon Heathrow
18h 18m
1 stop
STL11:23 pmLambert-St Louis
Mar 8
STL6:59 pmLambert-St Louis
33h 01m
1 stop
LHR9:00 amLondon Heathrow
$725
Find similar
Virgin Atlantic
Jan 13
LHR10:00 amLondon Heathrow
19h 39m
2 stops
STL11:39 pmLambert-St Louis
Jan 23
STL9:59 amLambert-St Louis
17h 01m
1 stop
LHR9:00 amLondon Heathrow
$746
Find similar

Finnair flights from London to St. Louis

Our best Finnair deals on London to St. Louis flight tickets
Finnair
Jan 13
LHR5:00 pmLondon Heathrow
22h 03m
2 stops
STL9:03 amLambert-St Louis
Jan 23
STL12:11 pmLambert-St Louis
15h 29m
2 stops
LHR9:40 amLondon Heathrow
$756
Find similar
Finnair
May 3
LHR8:20 amLondon Heathrow
13h 51m
1 stop
STL4:11 pmLambert-St Louis
May 10
STL6:05 pmLambert-St Louis
30h 50m
1 stop
LHR6:55 amLondon Heathrow
$772
Find similar
Finnair
Feb 6
LHR5:00 pmLondon Heathrow
22h 03m
2 stops
STL9:03 amLambert-St Louis
Feb 14
STL10:04 amLambert-St Louis
14h 56m
2 stops
LHR7:00 amLondon Heathrow
$796
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 December 10, 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

Thu 1/22

2:00 pm-10:23 am

1 stop26h 23m

Lambert-St Louis

Mon 1/26

10:16 am-10:00 am

1 stop17h 44m

$511

LondonSt. Louis

LGW - STL

LGWSTL

London Gatwick

Fri 1/23

2:00 pm-6:51 am

2 stops22h 51m

Lambert-St Louis

Fri 1/30

11:18 am-10:00 am

1 stop16h 42m

$556

LondonSt. Louis

LGW - STL

LGWSTL

London Gatwick

Thu 1/22

2:00 pm-6:51 am

2 stops22h 51m

Lambert-St Louis

Mon 1/26

10:16 am-10:00 am

1 stop17h 44m

$564

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 3/4

7:35 am-6:11 pm

2 stops16h 36m

Lambert-St Louis

Mon 3/9

6:57 pm-12:00 pm

1 stop12h 03m

$703

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Tue 1/6

11:05 am-11:25 pm

1 stop18h 20m

Lambert-St Louis

Tue 1/13

12:00 pm-9:00 am

1 stop15h 00m

$722

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Thu 3/5

11:05 am-11:23 pm

1 stop18h 18m

Lambert-St Louis

Sun 3/8

6:59 pm-9:00 am

1 stop33h 01m

$725

LondonSt. Louis

LCY - STL

LCYSTL

London City

Wed 3/4

7:50 am-1:54 pm

2 stops36h 04m

Lambert-St Louis

Mon 3/9

6:00 am-2:35 pm

2 stops27h 35m

$741

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 1/7

8:00 pm-11:02 am

2 stops21h 02m

Lambert-St Louis

Wed 1/14

7:10 am-6:25 am

1 stop17h 15m

$752

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Tue 1/13

5:00 pm-9:03 am

2 stops22h 03m

Lambert-St Louis

Fri 1/23

12:11 pm-9:40 am

2 stops15h 29m

$756

LondonSt. Louis

LCY - STL

LCYSTL

London City

Fri 3/6

7:45 am-5:42 pm

2 stops15h 57m

Lambert-St Louis

Mon 3/9

12:23 pm-9:30 am

2 stops16h 07m

$848

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 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 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 $979 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 $851 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 December 2025, prices for London to St. Louis flights are approximately 7% 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 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 and Saturday. The only airline offering direct flights is Finnair.
There is 1 airport near St. Louis: 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
7,573 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
Maryland Heights
O'Fallon
Florissant
Fenton
Wentzville
St. Peters
Collinsville
Alton
Farmington
Festus
Clayton
Glencoe
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

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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