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

For as low as £670, Delta can have you in St. Louis from London in 13h 34m. 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 Aer Lingus. Our recent data shows that you can find tickets from as low as £392 on this airline. Additional options worth looking into are Lufthansa and United Airlines, starting at £419 and £468 round-trip. These flights start at 46% 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 £355 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 £701. On average you can expect to pay £1,009. The most popular route, (London Heathrow - Lambert-St Louis), can usually be booked for £537.

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 American 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 0 inbound flights from London per day. You should also have plenty of airline options to choose from since 10 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.

£365+ 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 1 September 2026.

Wed 14/1008:40 -

2 stops16h 01m

Wed 21/1014:40 -

2 stops16h 20m

Deal found 29/8£648

Tue 15/920:40 -

2 stops30h 04m

Tue 29/917:18 -

2 stops20h 42m

Deal found 31/8£650

Thu 10/910:05 -

1 stop13h 19m

Sun 13/921:40 -

Nonstop8h 00m

Deal found 29/8£653

Sun 25/1012:05 -

2 stops56h 21m

Sun 1/1116:05 -

2 stops46h 55m

Deal found 27/8£654

Thu 1/1007:05 -

3 stops22h 37m

Sat 10/1014:25 -

2 stops25h 15m

Deal found 28/8£656

Thu 15/1014:00 -

2 stops33h 40m

Sat 24/1016:30 -

1 stop34h 45m

Deal found 27/8£656

Fri 18/909:45 -

1 stop13h 03m

Sun 4/1021:40 -

Nonstop8h 00m

Deal found 30/8£661

Wed 9/1211:10 -

1 stop34h 16m

Sat 9/116:05 -

1 stop10h 25m

Deal found 28/8£664

Fri 2/1014:00 -

2 stops35h 17m

Fri 16/1016:30 -

1 stop35h 30m

Deal found 31/8£665

Mon 9/1109:50 -

2 stops35h 36m

Mon 30/1116:05 -

2 stops14h 45m

Deal found 31/8£667

Wed 16/916:25 -

Nonstop9h 05m

Wed 23/917:18 -

1 stop12h 57m

Deal found 27/8£669

Wed 16/911:30 -

2 stops18h 13m

Wed 23/911:01 -

2 stops17h 49m

Deal found 31/8£669

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 1 September 2026.

Thu 4/208:40 -

2 stops17h 57m

Thu 18/211:51 -

1 stop12h 34m

Deal found 31/8£650

Fri 2/1014:00 -

2 stops35h 17m

Fri 16/1016:30 -

1 stop35h 30m

Deal found 31/8£665

Fri 2/1013:10 -

1 stop13h 34m

Fri 16/1021:35 -

Nonstop8h 00m

Deal found 31/8£670

Wed 23/920:40 -

2 stops30h 04m

Mon 28/911:01 -

2 stops17h 49m

Deal found 1/9£673

Thu 1/1010:25 -

2 stops15h 33m

Sat 10/1012:00 -

2 stops15h 20m

Deal found 30/8£689

Thu 1/1021:05 -

3 stops29h 16m

Sat 10/1012:00 -

2 stops27h 40m

Deal found 29/8£729

Sat 21/1107:45 -

2 stops39h 02m

Sat 28/1117:31 -

2 stops43h 04m

Deal found 30/8£882

Wed 14/1009:15 -

2 stops18h 06m

Wed 21/1012:20 -

2 stops23h 35m

Deal found 29/8£1,003

Mon 9/1110:55 -

2 stops40h 40m

Mon 30/1107:30 -

2 stops26h 50m

Deal found 31/8£1,057

Mon 9/1109:50 -

2 stops35h 36m

Mon 30/1116:05 -

2 stops14h 45m

Deal found 31/8£667

Tue 13/1014:25 -

1 stop13h 34m

Tue 20/1010:12 -

1 stop14h 08m

Deal found 28/8£671

Mon 12/1006:30 -

2 stops14h 15m

Mon 19/1010:14 -

2 stops14h 56m

Deal found 28/8£675

Wed 28/1009:50 -

2 stops34h 33m

Tue 3/1116:05 -

2 stops14h 45m

Deal found 29/8£670

Fri 9/1015:00 -

1 stop14h 59m

Fri 16/1021:35 -

Nonstop8h 00m

Deal found 27/8£675

Fri 18/906:15 -

2 stops16h 32m

Sun 4/1010:29 -

2 stops14h 16m

Deal found 30/8£678

Mon 5/1006:40 -

3 stops23h 02m

Fri 16/1012:00 -

2 stops22h 00m

Deal found 31/8£822

Mon 12/1010:25 -

2 stops16h 58m

Mon 19/1012:28 -

2 stops15h 12m

Deal found 28/8£692

Fri 18/909:25 -

2 stops16h 55m

Sun 4/1008:55 -

2 stops17h 30m

Deal found 30/8£709

Mon 16/1109:50 -

2 stops35h 36m

Sun 6/1216:05 -

2 stops14h 45m

Deal found 31/8£756

Tue 13/1017:35 -

2 stops33h 46m

Tue 20/1008:00 -

2 stops19h 55m

Deal found 28/8£1,059

Wed 28/1010:55 -

2 stops33h 48m

Tue 3/1107:30 -

2 stops50h 50m

Deal found 31/8£1,061

Wed 28/1011:55 -

2 stops15h 35m

Tue 3/1111:20 -

2 stops17h 35m

Deal found 27/8£798

Thu 1/1017:35 -

2 stops33h 46m

Sat 10/1008:00 -

2 stops26h 40m

Deal found 31/8£1,061

Wed 23/914:00 -

1 stop33h 54m

Mon 28/915:30 -

2 stops17h 25m

Deal found 1/9£805

Mon 12/1010:00 -

2 stops17h 23m

Mon 19/1012:00 -

2 stops13h 55m

Deal found 27/8£1,024

Wed 14/1017:45 -

2 stops33h 36m

Wed 21/1008:00 -

2 stops26h 40m

Deal found 29/8£1,061

Wed 28/1020:35 -

2 stops32h 05m

Tue 3/1110:55 -

3 stops17h 55m

Deal found 31/8£819

Tue 17/1117:20 -

2 stops34h 15m

Tue 24/1107:30 -

2 stops50h 50m

Deal found 29/8£1,061

Thu 10/1209:50 -

2 stops35h 36m

Sat 9/116:05 -

2 stops14h 35m

Deal found 27/8£890

Sat 21/1117:20 -

2 stops34h 15m

Sat 28/1107:30 -

2 stops26h 50m

Deal found 30/8£1,098

Find flight deals from London to St. Louis

Round-trip from	£648
One-way from	£365
Popular in	August
Cheapest in	February
Average price	£692
Good round-trip deal	£854 or less
Good one-way deal	£772 or less

Air Canada
14/10-21/10
4 total stops
32h 21m total
London to St. Louis

Search Deals

2/11
3 total stops
51h 05m total
London to St. Louis

Search Deals

Highest demand for flights based on searches. 9% potential increase in price (£56 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease (£16 potential savings vs. average return price).

Search Deals

Average for round-trip flights in September 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 4/2

08:40-20:37

2 stops17h 57m

Lambert-St Louis

Thu 18/2

11:51-06:25

1 stop12h 34m

£650

LondonSt. Louis

LGW London Gatwick - STL Lambert-St Louis

LGWSTL

London Gatwick

Fri 2/10

14:00-19:17

2 stops35h 17m

Lambert-St Louis

Fri 16/10

16:30-10:00

1 stop35h 30m

£665

LondonSt. Louis

LCY London City - STL Lambert-St Louis

LCYSTL

London City

Mon 9/11

09:50-15:26

2 stops35h 36m

Lambert-St Louis

Mon 30/11

16:05-12:50

2 stops14h 45m

£667

LondonSt. Louis

LCY London City - STL Lambert-St Louis

LCYSTL

London City

Wed 28/10

09:50-15:23

2 stops34h 33m

Lambert-St Louis

Tue 3/11

16:05-12:50

2 stops14h 45m

£670

Fastest return journey

LondonSt. Louis

LHR London Heathrow - STL Lambert-St Louis

LHRSTL

London Heathrow

Fri 2/10

13:10-20:44

1 stop13h 34m

Lambert-St Louis

Fri 16/10

21:35-11:35

Nonstop8h 00m

£670

LondonSt. Louis

LHR London Heathrow - STL Lambert-St Louis

LHRSTL

London Heathrow

Tue 13/10

14:25-21:59

1 stop13h 34m

Lambert-St Louis

Tue 20/10

10:12-06:20

1 stop14h 08m

£671

LondonSt. Louis

LGW London Gatwick - STL Lambert-St Louis

LGWSTL

London Gatwick

Wed 23/9

20:40-20:44

2 stops30h 04m

Lambert-St Louis

Mon 28/9

11:01-10:50

2 stops17h 49m

£673

LondonSt. Louis

LHR London Heathrow - STL Lambert-St Louis

LHRSTL

London Heathrow

Mon 12/10

06:30-14:45

2 stops14h 15m

Lambert-St Louis

Mon 19/10

10:14-07:10

2 stops14h 56m

£675

LondonSt. Louis

LHR London Heathrow - STL Lambert-St Louis

LHRSTL

London Heathrow

Fri 9/10

15:00-23:59

1 stop14h 59m

Lambert-St Louis

Fri 16/10

21:35-11:35

Nonstop8h 00m

£675

LondonSt. Louis

LHR London Heathrow - STL Lambert-St Louis

LHRSTL

London Heathrow

Fri 18/9

06:15-16:47

2 stops16h 32m

Lambert-St Louis

Sun 4/10

10:29-06:45

2 stops14h 16m

£678

Flights are sorted by cheapest return flights first.

Deals found on 1/9

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

LGW-STL

LHR-STL

LCY-STL

STN-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

LGW-STL

LHR-STL

LCY-STL

STN-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 £533). Flying from London to St. Louis in August is currently the most expensive (average of £974). 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 £649 and £723 in October.
The cheapest return price found within the last 5 days was £648 on Air Canada (14 Oct–21 Oct).

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

Atlanta (ATL) – chosen by Cheapflights users on 48% 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 £371.

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 17% of weekly flights between London and St. Louis have experienced delays in the past year, with the average delay time being 112 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 Sunday 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 17% 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 United Airlines,Virgin Atlantic, andAer Lingus 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.

United Airlines

7.4

Good

10,157 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Chris,Aug 2026

MIA - ORD

Had to go through TSA again, already purchased bottle drink. TSA would not let through, United changed gates last minute. This experience bad for everyone. Staff rude, not our fault. Staff from Chicago to Wichita excellent!

United Airlines

7.4

Good

10,157 reviews

United Airlines

7.4

Good

10,157 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Chris,Aug 2026

MIA - ORD

Virgin Atlantic

7.4

Good

695 reviews

United Airlines

7.4

Good

10,157 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Chris,Aug 2026

MIA - ORD

Aer Lingus

7.3

Good

1,736 reviews

United Airlines

7.4

Good

10,157 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Chris,Aug 2026

MIA - ORD

American Airlines

7.1

Good

12,023 reviews

United Airlines

7.4

Good

10,157 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Chris,Aug 2026

MIA - ORD

British Airways

6.7

Okay

8,195 reviews

United Airlines

7.4

Good

10,157 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Chris,Aug 2026

MIA - ORD

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 0 inbound flights from London per day. You should also have plenty of airline options to choose from since 10 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 £670, Delta can have you in St. Louis from London in 13h 34m. 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 Aer Lingus. Our recent data shows that you can find tickets from as low as £392 on this airline. Additional options worth looking into are Lufthansa and United Airlines, starting at £419 and £468 round-trip. These flights start at 46% 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 £355 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 £701. On average you can expect to pay £1,009. The most popular route, (London Heathrow - Lambert-St Louis), can usually be booked for £537.
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 £533). Flying from London to St. Louis in August is currently the most expensive (average of £974). 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

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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 10 airlines flying from London to St. Louis

Airline	Cheapest	Average	Flexibility	On-time
Aer Lingus	Cheapest£392	Average£807	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
Lufthansa	Cheapest£419	Average£749	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
United Airlines	Cheapest£468	Average£698	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Finnair	Cheapest£497	Average£661	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
KLM	Cheapest£498	Average£743	FlexibilityNo cancel fee	On-time75%	Search KLM flights
British Airways	Cheapest£508	Average£755	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Air Canada	Cheapest£510	Average£684	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
Virgin Atlantic	Cheapest£550	Average£739	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
American Airlines	Cheapest£581	Average£737	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
Iberia	Cheapest£614	Average£1,145	FlexibilityNo cancel fee	On-time77%	Search Iberia 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.

Can Cheapflights find flights from London to St. Louis with no change fees?

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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Not ready to book yet? You can track prices for flights from London to St. Louis on Cheapflights with our Price Alert feature and get notified when better prices are available.

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Cheap flights from London to St. Louis from £365

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 2/11. 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 1 September 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 1 September 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 1 September 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 1 September 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 1 September 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 1 September 2026.

Last-minute flights from London to St. LouisDiscover last-minute flight deals from London to St. Louis. Data last updated 1 September 2026 and is based on user searches.

Discover last-minute flight deals from London to St. Louis. Data last updated 1 September 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 1 September 2026.

Search for one-way flight options from London to St. Louis. Find affordable one-way fares based on user searches. Data last updated 1 September 2026.

Find flight deals from London to St. Louis

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Cheapflights Fare Finder

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 1 September 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 £649 and £723 in October.The cheapest return price found within the last 5 days was £648 on Air Canada (14 Oct–21 Oct).

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 48% 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 £371.

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 17% of weekly flights between London and St. Louis have experienced delays in the past year, with the average delay time being 112 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 Sunday 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 17% 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 United Airlines,Virgin Atlantic, andAer Lingus 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?

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

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 1 September 2026.

Alternative routes for London to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.

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 1 September 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 1 September 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 1 September 2026.

Last-minute flights from London to St. Louis
Discover last-minute flight deals from London to St. Louis. Data last updated 1 September 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 1 September 2026.

London to St. Louis flights typically cost between £649 and £723 in October.
The cheapest return price found within the last 5 days was £648 on Air Canada (14 Oct–21 Oct).