How long is the flight from London to St. Louis?

For as low as £657, Scandinavian Airlines can have you in St. Louis from London in 14h 54m. Airlines will cover a distance of 4186 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

What are the cheapest airlines flying from London to St. Louis round-trip?

Our cheapest airline available from London to St. Louis is American Airlines. Our recent data shows that you can find tickets from as low as £219 on this airline. Additional options worth looking into are Aer Lingus and Lufthansa, starting at £364 and £419 round-trip. These flights start at 70% lower than the current average price 3 months from now.

What are the cheapest airlines to fly from London to St. Louis one-way?

To fly one-way, consider booking your trip with British Airways, which is currently one of the cheapest options available, starting at £339. United Airlines flights start at £354 while deals on Lufthansa start at £398 one-way.

In terms of precipitation, rainfall in St. Louis ranges from 56.0 - 119.0 inches per month. May is typically the wettest month, when rainfall can reach 119.0 mm. February is typically the driest time to visit St. Louis when rainfall is around 56.0 mm.

If weather is an important factor for your trip to St. Louis, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 27.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 0.0 C).

What are the most popular routes from London to St. Louis?

When deciding which route to take from London to St. Louis consider London Heathrow - Lambert-St Louis, London Gatwick - Lambert-St Louis or London Stansted - Lambert-St Louis as they are the most popular.

What are the cheapest flights from London to St. Louis?

The cheapest flight price from London to St. Louis is £722. On average you can expect to pay £994. The most popular route, (London Heathrow - Lambert-St Louis), can usually be booked for £585.

What are the most reliable airlines from London to St. Louis?

Consider American Airlines (77%), Aer Lingus (77%) or Finnair (77%) when booking your flight. These represent the most reliable airlines when flying from London to St. Louis.

What are the most popular airlines that fly from London to St. Louis?

British Airways, Virgin Atlantic and United Airlines are the most popular airlines when flying from London to St. Louis.

What airport do you fly into for flights to St. Louis from London?

Lambert-St Louis (STL) is the airport you will fly into if you book a flight from London to St. Louis. You should not have trouble finding flights to Lambert-St Louis from London; the airport handles an average of 2 inbound flights from London per day. You should also have plenty of airline options to choose from since 9 airlines have flights to the St. Louis airport from London. It is only a 12.7 mi journey from Lambert-St Louis (STL) to St. Louis’s city center.

Can I find deals for flights from London to St. Louis that include hotel bookings?

Yes. In addition to deals on London to St. Louis flights, Cheapflights offers holiday packages that include both flights and hotel.

How can I find direct flights from London to St. Louis?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to St. Louis.

Can I find deals for business class flights from London to St. Louis?

Yes. Cheapflights offers flight deals from London to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

£314+ Cheap Flights from London to St. Louis

Cheapflights Tip: The best prices from London to Lambert-St Louis are usually found in February or January, booked 21 days in advance, depart on a Friday or Thursday and return on a Wednesday

Cheap flight deals from London to St. Louis

Enter your travel dates to find the best prices.

Cheapest

Best

Direct

Last-minute

One-way

Cheapest flights from London to St. Louis
Explore the most affordable flight options available from London to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 August 2026.

Tue 15/909:45 -

1 stop16h 59m

Tue 29/912:46 -

1 stop14h 19m

Deal found 15/8£595

Thu 22/1014:00 -

1 stop15h 13m

Tue 10/1110:35 -

2 stops37h 25m

Deal found 15/8£595

Wed 30/912:15 -

1 stop14h 29m

Wed 7/1017:27 -

1 stop12h 48m

Deal found 16/8£596

Tue 15/913:25 -

1 stop12h 33m

Tue 29/917:47 -

1 stop13h 18m

Deal found 15/8£597

Thu 24/918:40 -

2 stops35h 02m

Mon 28/914:30 -

2 stops19h 30m

Deal found 13/8£598

Mon 19/1014:00 -

1 stop15h 13m

Sat 7/1120:34 -

1 stop29h 41m

Deal found 15/8£603

Mon 28/906:30 -

1 stop12h 55m

Mon 5/1013:09 -

1 stop11h 46m

Deal found 14/8£604

Thu 1/1014:00 -

1 stop32h 34m

Sun 11/1016:30 -

1 stop35h 30m

Deal found 16/8£604

Mon 14/915:15 -

1 stop34h 43m

Sat 19/915:54 -

1 stop32h 31m

Deal found 17/8£605

Sat 3/1014:00 -

1 stop32h 34m

Fri 16/1018:35 -

2 stops33h 25m

Deal found 16/8£605

Sat 5/914:00 -

1 stop32h 11m

Sat 12/920:10 -

2 stops31h 50m

Deal found 14/8£607

Wed 23/914:00 -

1 stop33h 54m

Wed 7/1014:29 -

2 stops33h 51m

Deal found 13/8£608

Best flights from London to St. Louis
Discover carefully curated flight deals from London to St. Louis that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 18 August 2026.

Thu 24/918:40 -

2 stops35h 02m

Mon 28/914:30 -

2 stops19h 30m

Deal found 17/8£601

Mon 21/920:15 -

2 stops26h 55m

Mon 5/1017:47 -

2 stops16h 53m

Deal found 13/8£657

Tue 29/914:50 -

1 stop14h 54m

Tue 6/1017:36 -

1 stop12h 19m

Deal found 15/8£657

Tue 22/909:35 -

2 stops18h 09m

Wed 30/911:01 -

2 stops22h 14m

Deal found 15/8£665

Tue 29/920:40 -

2 stops30h 04m

Mon 12/1007:28 -

2 stops30h 32m

Deal found 16/8£669

Wed 28/1009:50 -

2 stops34h 36m

Tue 3/1116:05 -

2 stops14h 45m

Deal found 15/8£688

Thu 24/912:05 -

1 stop14h 15m

Mon 28/912:10 -

2 stops12h 20m

Deal found 17/8£694

Thu 1/1008:25 -

2 stops18h 10m

Thu 8/1010:31 -

2 stops15h 24m

Deal found 16/8£720

Thu 1/1010:25 -

2 stops15h 33m

Fri 9/1018:05 -

2 stops15h 55m

Deal found 18/8£739

Sun 18/1018:30 -

2 stops32h 51m

Sat 31/1018:50 -

2 stops33h 25m

Deal found 17/8£818

Tue 29/910:45 -

2 stops15h 50m

Tue 6/1018:05 -

2 stops33h 20m

Deal found 14/8£869

Mon 21/910:50 -

2 stops41h 10m

Mon 5/1008:00 -

2 stops50h 50m

Deal found 13/8£1,053

Tue 15/908:25 -

2 stops18h 10m

Tue 29/917:47 -

2 stops16h 53m

Deal found 16/8£658

Thu 24/911:05 -

1 stop14h 36m

Mon 28/913:09 -

1 stop11h 46m

Deal found 13/8£685

Thu 1/1006:40 -

2 stops23h 02m

Fri 9/1014:25 -

2 stops19h 35m

Deal found 18/8£694

Wed 2/920:40 -

2 stops33h 34m

Wed 23/913:49 -

2 stops15h 01m

Deal found 14/8£708

Fri 20/1109:50 -

2 stops35h 36m

Tue 1/1216:05 -

2 stops14h 45m

Deal found 15/8£720

Wed 2/916:25 -

Nonstop9h 05m

Wed 23/921:35 -

Nonstop8h 00m

Deal found 13/8£730

Sat 7/1109:00 -

2 stops16h 23m

Sat 21/1115:15 -

2 stops13h 35m

Deal found 17/8£690

Wed 2/909:35 -

2 stops19h 59m

Wed 23/911:01 -

2 stops22h 14m

Deal found 14/8£735

Sun 18/1006:40 -

3 stops23h 14m

Wed 28/1017:35 -

2 stops23h 05m

Deal found 17/8£737

Sat 29/814:00 -

1 stop32h 11m

Sat 5/917:02 -

1 stop34h 58m

Deal found 13/8£737

Wed 14/1016:25 -

Nonstop9h 05m

Sun 18/1019:10 -

1 stop13h 15m

Deal found 16/8£741

Wed 2/908:40 -

2 stops16h 36m

Wed 23/910:53 -

2 stops14h 22m

Deal found 15/8£698

Wed 30/915:40 -

2 stops37h 35m

Wed 7/1015:00 -

2 stops17h 40m

Deal found 16/8£777

Tue 1/909:35 -

2 stops18h 01m

Sat 31/1011:31 -

2 stops40h 19m

Deal found 14/8£848

Tue 1/907:25 -

2 stops15h 41m

Sat 31/1015:15 -

2 stops14h 10m

Deal found 14/8£789

Thu 24/917:35 -

2 stops33h 46m

Thu 8/1008:00 -

2 stops26h 40m

Deal found 13/8£1,053

Wed 2/911:35 -

2 stops32h 27m

Wed 23/912:10 -

2 stops22h 55m

Deal found 13/8£809

Sun 18/1010:50 -

2 stops40h 31m

Wed 28/1007:30 -

2 stops21h 25m

Deal found 17/8£1,056

Find flight deals from London to St. Louis

Round-trip from	£595
One-way from	£314
Popular in	August
Cheapest in	February
Average price	£961
Good round-trip deal	£869 or less
Good one-way deal	£774 or less

Finnair
15/9-29/9
2 total stops
31h 18m total
London to St. Louis

Search Deals

2/12
1 total stop
20h 31m total
London to St. Louis

Search Deals

Highest demand for flights based on searches. 7% potential increase in price (£46 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (£16 potential savings vs. average return price).

Search Deals

Average for round-trip flights in August 2026

Search Deals

Price to beat on a round-trip flight from London (LON) to Lambert-St Louis.

Search Deals

Price to beat on a one-way flight from London (LON) to Lambert-St Louis.

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonSt. Louis

LHR London Heathrow - STL Lambert-St Louis

LHRSTL

London Heathrow

Thu 24/9

18:40-23:42

2 stops35h 02m

Lambert-St Louis

Mon 28/9

14:30-16:00

2 stops19h 30m

£601

LondonSt. Louis

LCY London City - STL Lambert-St Louis

LCYSTL

London City

Mon 21/9

20:15-17:10

2 stops26h 55m

Lambert-St Louis

Mon 5/10

17:47-16:40

2 stops16h 53m

£657

LondonSt. Louis

LHR London Heathrow - STL Lambert-St Louis

LHRSTL

London Heathrow

Tue 29/9

14:50-23:44

1 stop14h 54m

Lambert-St Louis

Tue 6/10

17:36-11:55

1 stop12h 19m

£657

LondonSt. Louis

LCY London City - STL Lambert-St Louis

LCYSTL

London City

Tue 15/9

08:25-20:35

2 stops18h 10m

Lambert-St Louis

Tue 29/9

17:47-16:40

2 stops16h 53m

£658

LondonSt. Louis

LCY London City - STL Lambert-St Louis

LCYSTL

London City

Tue 22/9

09:35-21:44

2 stops18h 09m

Lambert-St Louis

Wed 30/9

11:01-15:15

2 stops22h 14m

£665

LondonSt. Louis

LGW London Gatwick - STL Lambert-St Louis

LGWSTL

London Gatwick

Tue 29/9

20:40-20:44

2 stops30h 04m

Lambert-St Louis

Mon 12/10

07:28-20:00

2 stops30h 32m

£669

LondonSt. Louis

LHR London Heathrow - STL Lambert-St Louis

LHRSTL

London Heathrow

Thu 24/9

11:05-19:41

1 stop14h 36m

Lambert-St Louis

Mon 28/9

13:09-06:55

1 stop11h 46m

£685

LondonSt. Louis

LCY London City - STL Lambert-St Louis

LCYSTL

London City

Wed 28/10

09:50-15:26

2 stops34h 36m

Lambert-St Louis

Tue 3/11

16:05-12:50

2 stops14h 45m

£688

LondonSt. Louis

LHR London Heathrow - STL Lambert-St Louis

LHRSTL

London Heathrow

Sat 7/11

09:00-19:23

2 stops16h 23m

Lambert-St Louis

Sat 21/11

15:15-10:50

2 stops13h 35m

£690

LondonSt. Louis

LHR London Heathrow - STL Lambert-St Louis

LHRSTL

London Heathrow

Thu 24/9

12:05-20:20

1 stop14h 15m

Lambert-St Louis

Mon 28/9

12:10-06:30

2 stops12h 20m

£694

Flights are sorted by cheapest return flights first.

Deals found on 17/8

Showing 1-10 of 60 resultsSorted by cheapest first

...

Best time to book a flight from London to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from London with our price prediction graph.

LON-STL

LHR-STL

LGW-STL

STN-STL

LCY-STL

Estimated return price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from London to St. Louis

LON-STL

LHR-STL

LGW-STL

STN-STL

LCY-STL

What is the cheapest month to book a flight from London to St. Louis?

Currently, February is the cheapest month in which you can book a flight from London to St. Louis (average of £564). Flying from London to St. Louis in August is currently the most expensive (average of £961). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from LON to STL?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London to St. Louis as you normally would.

How much does it cost for a return flight from London to St. Louis?

Airfare is below average for this route at the moment.

London to St. Louis flights typically cost between £704 and £1,028 in September.
The cheapest return price found within the last 5 days was £595 on Finnair (15 Sept–29 Sept).

What’s the top stopover airport for flights from London to St. Louis?

Atlanta (ATL) – chosen by Cheapflights users on 44% of one-stop itineraries from London to St. Louis on Cheapflights.

What’s the cheapest stopover airport for flights from London to St. Louis?

Reykjavik (KEF) is the most affordable one-stop option, with an average return flight price of £370.

What’s the fastest stopover option from London to St. Louis?

Flights via Reykjavik (KEF) have the shortest average one-way travel time for one-stop routes: 11h 05m.

Which airport typically offers the quickest stopover for flights from London to St. Louis?

Flights via Reykjavik (KEF) offer the fastest connection on this route, with an average stopover time of 0h 55m.

How often are flights from London to St. Louis delayed?

About 14% of weekly flights between London and St. Louis have experienced delays in the past year, with the average delay time being 117 minutes.

What is the most punctual flight time for London to St. Louis flights?

Historically, flights departing in the early afternoon are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Friday tends to have the lowest number of delays on this route, whereas Tuesday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on London to St. Louis flights?

Over the past year, British Airways have had the lowest number of delays on this route, with just 14% of flights being delayed.

How far ahead should I book a flight from London to St. Louis?

To ensure you get the cheapest price possible for a flight from London to St. Louis, you should look to book at least 70 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

Reviews of airlines servicing St. Louis

See what other customers who have flown with Virgin Atlantic,United Airlines, andAmerican Airlines from London to St. Louis have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Virgin Atlantic

7.5

Good

692 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.

Virgin Atlantic

7.5

Good

692 reviews

Virgin Atlantic

7.5

Good

692 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.

United Airlines

7.4

Good

10,104 reviews

Virgin Atlantic

7.5

Good

692 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.

American Airlines

7.1

Good

11,952 reviews

Virgin Atlantic

7.5

Good

692 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.

Air Canada

7.1

Good

11,488 reviews

Virgin Atlantic

7.5

Good

692 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.

British Airways

6.7

Okay

8,173 reviews

Virgin Atlantic

7.5

Good

692 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.

Related info for your journey

What airport do you fly into for flights to St. Louis from London?
Lambert-St Louis (STL) is the airport you will fly into if you book a flight from London to St. Louis. You should not have trouble finding flights to Lambert-St Louis from London; the airport handles an average of 2 inbound flights from London per day. You should also have plenty of airline options to choose from since 9 airlines have flights to the St. Louis airport from London. It is only a 12.7 mi journey from Lambert-St Louis (STL) to St. Louis’s city center.
How long is the flight from London to St. Louis?
For as low as £657, Scandinavian Airlines can have you in St. Louis from London in 14h 54m. Airlines will cover a distance of 4186 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.
What are the cheapest airlines flying from London to St. Louis round-trip?
Our cheapest airline available from London to St. Louis is American Airlines. Our recent data shows that you can find tickets from as low as £219 on this airline. Additional options worth looking into are Aer Lingus and Lufthansa, starting at £364 and £419 round-trip. These flights start at 70% lower than the current average price 3 months from now.
What are the cheapest airlines to fly from London to St. Louis one-way?
To fly one-way, consider booking your trip with British Airways, which is currently one of the cheapest options available, starting at £339. United Airlines flights start at £354 while deals on Lufthansa start at £398 one-way.
What are the most popular routes from London to St. Louis?
When deciding which route to take from London to St. Louis consider London Heathrow - Lambert-St Louis, London Gatwick - Lambert-St Louis or London Stansted - Lambert-St Louis as they are the most popular.
What are the most reliable airlines from London to St. Louis?
Consider American Airlines (77%), Aer Lingus (77%) or Finnair (77%) when booking your flight. These represent the most reliable airlines when flying from London to St. Louis.
What are the cheapest flights from London to St. Louis?
The cheapest flight price from London to St. Louis is £722. On average you can expect to pay £994. The most popular route, (London Heathrow - Lambert-St Louis), can usually be booked for £585.
Can I find deals for flights from London to St. Louis that include hotel bookings?
Yes. In addition to deals on London to St. Louis flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from London to St. Louis?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to St. Louis.
Can I find deals for business class flights from London to St. Louis?
Yes. Cheapflights offers flight deals from London to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from London to St. Louis?
Currently, February is the cheapest month in which you can book a flight from London to St. Louis (average of £564). Flying from London to St. Louis in August is currently the most expensive (average of £961). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Fly from London to St. Louis on these airlines

British Airways flights from London to Lambert-St Louis

Virgin Atlantic flights from London to Lambert-St Louis

Finnair flights from London to Lambert-St Louis

Top 9 airlines flying from London to St. Louis

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	Cheapest£219	Average£730	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
Aer Lingus	Cheapest£364	Average£806	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
Lufthansa	Cheapest£419	Average£716	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
United Airlines	Cheapest£468	Average£698	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
British Airways	Cheapest£488	Average£730	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
KLM	Cheapest£498	Average£743	FlexibilityNo cancel fee	On-time75%	Search KLM flights
Air Canada	Cheapest£510	Average£665	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
Virgin Atlantic	Cheapest£550	Average£749	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
Finnair	Cheapest£554	Average£678	FlexibilityNo cancel fee	On-time76%	Search Finnair flights

Fly with Cheapflights

How does Cheapflights help users find flights from London to St. Louis?

Cheapflights helps you search for flights from London to St. Louis via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from London to St. Louis?

Millions of users choose and trust Cheapflights to book the best flight deals from London to St. Louis for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

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Users can book flights with no change fees policies with our dedicated filters. Book flights from London to St. Louis flexibly with Cheapflights today.

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Cheap flights from London to St. Louis from £314

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/12. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from London to St. Louis

Cheapest flights from London to St. LouisExplore the most affordable flight options available from London to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 August 2026.

Explore the most affordable flight options available from London to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 August 2026.

Best flights from London to St. LouisDiscover carefully curated flight deals from London to St. Louis that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 18 August 2026.

Discover carefully curated flight deals from London to St. Louis that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 18 August 2026.

Direct flights from London to St. LouisExplore direct flight options from London to St. Louis based on user searches, and compare prices and availability for your desired travel dates. Data last updated 18 August 2026.

Explore direct flight options from London to St. Louis based on user searches, and compare prices and availability for your desired travel dates. Data last updated 18 August 2026.

Last-minute flights from London to St. LouisDiscover last-minute flight deals from London to St. Louis. Data last updated 18 August 2026 and is based on user searches.

Discover last-minute flight deals from London to St. Louis. Data last updated 18 August 2026 and is based on user searches.

One-way flights from London to St. LouisSearch for one-way flight options from London to St. Louis. Find affordable one-way fares based on user searches. Data last updated 18 August 2026.

Search for one-way flight options from London to St. Louis. Find affordable one-way fares based on user searches. Data last updated 18 August 2026.

Find flight deals from London to St. Louis

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One-way from

Popular in

Cheapest in

Average price

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Good one-way deal

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Use the filters below to find and compare flights from London to St. Louis that are best for you.

Best time to book a flight from London to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from London with our price prediction graph.

Cheapflights Insights

What is the cheapest month to book a flight from London to St. Louis?

What is the cheapest time of day to fly from LON to STL?

Find hourly flight availability from London to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 18 August 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London to St. Louis as you normally would.

How much does it cost for a return flight from London to St. Louis?

Airfare is below average for this route at the moment.

London to St. Louis flights typically cost between £704 and £1,028 in September.The cheapest return price found within the last 5 days was £595 on Finnair (15 Sept–29 Sept).

What’s the top stopover airport for flights from London to St. Louis?

Share of one-stop return flights from London to St. Louis chosen by Cheapflights users in the past 12 months, using the same stopover each way.

Atlanta (ATL) – chosen by Cheapflights users on 44% of one-stop itineraries from London to St. Louis on Cheapflights.

What’s the cheapest stopover airport for flights from London to St. Louis?

Average return fare for one-stop flights from London to St. Louis, chosen by Cheapflights users in the past 12 months, with the same stopover each way.

Reykjavik (KEF) is the most affordable one-stop option, with an average return flight price of £370.

What’s the fastest stopover option from London to St. Louis?

Shortest average travel time for one-stop one-way flights from London to St. Louis, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.

Flights via Reykjavik (KEF) have the shortest average one-way travel time for one-stop routes: 11h 05m.

Which airport typically offers the quickest stopover for flights from London to St. Louis?

Average stopover duration for one-stop one-way flights from London to St. Louis, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Reykjavik (KEF) offer the fastest connection on this route, with an average stopover time of 0h 55m.

How often are flights from London to St. Louis delayed?

About 14% of weekly flights between London and St. Louis have experienced delays in the past year, with the average delay time being 117 minutes.

What is the most punctual flight time for London to St. Louis flights?

Historically, flights departing in the early afternoon are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Friday tends to have the lowest number of delays on this route, whereas Tuesday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on London to St. Louis flights?

Over the past year, British Airways have had the lowest number of delays on this route, with just 14% of flights being delayed.

How far ahead should I book a flight from London to St. Louis?

To ensure you get the cheapest price possible for a flight from London to St. Louis, you should look to book at least 70 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

Reviews of airlines servicing St. Louis

See what other customers who have flown with Virgin Atlantic,United Airlines, andAmerican Airlines from London to St. Louis have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

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How long is the flight from London to St. Louis?

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What are the cheapest airlines to fly from London to St. Louis one-way?

What are the most popular routes from London to St. Louis?

What are the most reliable airlines from London to St. Louis?

What are the cheapest flights from London to St. Louis?

Can I find deals for flights from London to St. Louis that include hotel bookings?

How can I find direct flights from London to St. Louis?

Can I find deals for business class flights from London to St. Louis?

What is the cheapest month to book a flight from London to St. Louis?

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Fly from London to St. Louis on these airlines

Choose from the following airlines for your flight from London to St. Louis. Flights are based on user searches made on Cheapflights and were last updated on 18 August 2026.

Alternative routes for London to St. Louis

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Complete your trip

Complete your trip to St. Louis by adding a car hire and/or hotel booking to your travel itinerary.

Direct flights to United States

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Cheapest flights from London to St. Louis
Explore the most affordable flight options available from London to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 August 2026.

Best flights from London to St. Louis
Discover carefully curated flight deals from London to St. Louis that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 18 August 2026.

Direct flights from London to St. Louis
Explore direct flight options from London to St. Louis based on user searches, and compare prices and availability for your desired travel dates. Data last updated 18 August 2026.

Last-minute flights from London to St. Louis
Discover last-minute flight deals from London to St. Louis. Data last updated 18 August 2026 and is based on user searches.

One-way flights from London to St. Louis
Search for one-way flight options from London to St. Louis. Find affordable one-way fares based on user searches. Data last updated 18 August 2026.

London to St. Louis flights typically cost between £704 and £1,028 in September.
The cheapest return price found within the last 5 days was £595 on Finnair (15 Sept–29 Sept).