Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from London to St. Louis from $296

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 2/5. 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

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

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 - 11:33 pm
LGW
-
STL
15h 33m1 stop
Multiple Airlines Logo
5:42 pm - 10:00 am
STL
-
LGW
34h 18m1 stop
$529Multiple Airlines
Fri, Jan 23 - Thu, Feb 5
Multiple Airlines Logo
2:00 pm - 11:33 pm
LGW
-
STL
15h 33m1 stop
Multiple Airlines Logo
11:18 am - 10:00 am
STL
-
LGW
16h 42m1 stop
$547Multiple Airlines
Fri, Jan 23 - Fri, Jan 30
Lufthansa Logo
6:30 am - 1:55 pm
LHR
-
STL
13h 25m1 stop
Lufthansa Logo
11:22 am - 10:25 am
STL
-
LHR
17h 03m1 stop
$573Lufthansa
Fri, Jan 23 - Thu, Feb 5
United Airlines Logo
9:00 am - 7:27 pm
LHR
-
STL
16h 27m2 stops
United Airlines Logo
11:25 am - 6:40 am
STL
-
LHR
13h 15m2 stops
$597United Airlines
Tue, Feb 10 - Tue, Feb 17
United Airlines Logo
6:30 am - 1:55 pm
LHR
-
STL
13h 25m1 stop
United Airlines Logo
3:11 pm - 10:50 am
STL
-
LHR
13h 39m2 stops
$599United Airlines
Fri, Jan 23 - Fri, Jan 30
British Airways Logo
2:10 pm - 8:13 pm
LHR
-
STL
12h 03m1 stop
British Airways Logo
6:58 pm - 12:00 pm
STL
-
LHR
11h 02m1 stop
$611British Airways
Mon, Feb 9 - Mon, Feb 16
Lufthansa Logo
9:50 am - 11:59 pm
LCY
-
STL
20h 09m2 stops
Lufthansa Logo
1:11 pm - 9:15 am
STL
-
LCY
14h 04m2 stops
$671Lufthansa
Mon, Feb 9 - Mon, Feb 16
British Airways Logo
7:15 am - 10:44 pm
LCY
-
STL
21h 29m2 stops
British Airways Logo
4:32 pm - 2:05 pm
STL
-
LCY
16h 33m2 stops
$687British Airways
Wed, Jan 14 - Wed, Mar 11
Iberia Logo
7:50 am - 6:02 pm
LCY
-
STL
16h 12m2 stops
Iberia Logo
10:04 am - 8:50 am
STL
-
LCY
40h 46m2 stops
$760Iberia
Thu, Feb 19 - Mon, Feb 23
Iberia Logo
11:45 am - 9:15 pm
LGW
-
STL
39h 30m2 stops
Iberia Logo
11:05 am - 7:00 pm
STL
-
LGW
25h 55m2 stops
$949Iberia
Thu, Jan 22 - Mon, Jan 26

Austrian Airlines flights from London to St. Louis

Our best Austrian Airlines deals on London to St. Louis flight tickets
Austrian Airlines
Feb 9
LHR4:00 pmLondon Heathrow
13h 59m
1 stop
STL11:59 pmLambert-St Louis
Feb 16
STL1:11 pmLambert-St Louis
10h 44m
1 stop
LHR5:55 amLondon Heathrow
$615
Find similar
Austrian Airlines
Feb 13
LHR4:00 pmLondon Heathrow
14h 05m
1 stop
STL12:05 amLambert-St Louis
Feb 19
STL11:39 amLambert-St Louis
14h 46m
1 stop
LHR8:25 amLondon Heathrow
$617
Find similar

Delta flights from London to St. Louis

Our best Delta deals on London to St. Louis flight tickets
Delta
Jan 7
LHR8:55 amLondon Heathrow
20h 44m
1 stop
STL11:39 pmLambert-St Louis
Jan 14
STL6:00 amLambert-St Louis
19h 50m
1 stop
LHR7:50 amLondon Heathrow
$658
Find similar
Delta
Jan 7
LHR8:55 amLondon Heathrow
17h 48m
2 stops
STL8:43 pmLambert-St Louis
Jan 14
STL6:00 amLambert-St Louis
21h 00m
1 stop
LHR9:00 amLondon Heathrow
$659
Find similar
Delta
Jan 7
LHR8:55 amLondon Heathrow
17h 48m
2 stops
STL8:43 pmLambert-St Louis
Jan 14
STL6:00 amLambert-St Louis
19h 50m
1 stop
LHR7:50 amLondon Heathrow
$688
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 28, 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

Fri 1/23

2:00 pm-11:33 pm

1 stop15h 33m

Lambert-St Louis

Thu 2/5

5:42 pm-10:00 am

1 stop34h 18m

$529

LondonSt. Louis

LGW - STL

LGWSTL

London Gatwick

Fri 1/23

2:00 pm-11:33 pm

1 stop15h 33m

Lambert-St Louis

Fri 1/30

11:18 am-10:00 am

1 stop16h 42m

$547

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Fri 1/23

6:30 am-1:55 pm

1 stop13h 25m

Lambert-St Louis

Thu 2/5

11:22 am-10:25 am

1 stop17h 03m

$573

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Tue 2/10

9:00 am-7:27 pm

2 stops16h 27m

Lambert-St Louis

Tue 2/17

11:25 am-6:40 am

2 stops13h 15m

$597

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Fri 1/23

6:30 am-1:55 pm

1 stop13h 25m

Lambert-St Louis

Fri 1/30

3:11 pm-10:50 am

2 stops13h 39m

$599

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 2/9

2:10 pm-8:13 pm

1 stop12h 03m

Lambert-St Louis

Mon 2/16

6:58 pm-12:00 pm

1 stop11h 02m

$611

LondonSt. Louis

LCY - STL

LCYSTL

London City

Mon 2/9

9:50 am-11:59 pm

2 stops20h 09m

Lambert-St Louis

Mon 2/16

1:11 pm-9:15 am

2 stops14h 04m

$671

LondonSt. Louis

LCY - STL

LCYSTL

London City

Wed 1/14

7:15 am-10:44 pm

2 stops21h 29m

Lambert-St Louis

Wed 3/11

4:32 pm-2:05 pm

2 stops16h 33m

$687

LondonSt. Louis

LCY - STL

LCYSTL

London City

Thu 2/19

7:50 am-6:02 pm

2 stops16h 12m

Lambert-St Louis

Mon 2/23

10:04 am-8:50 am

2 stops40h 46m

$760

LondonSt. Louis

LGW - STL

LGWSTL

London Gatwick

Thu 1/22

11:45 am-9:15 pm

2 stops39h 30m

Lambert-St Louis

Mon 1/26

11:05 am-7:00 pm

2 stops25h 55m

$949

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 $790.

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 $980 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 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 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, 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
7,616 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
Collinsville
St. Peters
Wentzville
Alton
Farmington
Clayton
Glencoe
Eureka
Festus
Edwardsville
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.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Tue 1/27
Tue 2/3
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States