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

For as low as £636, Scandinavian Airlines can have you in St. Louis from London in 11h 44m. 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 £87 on this airline. Additional options worth looking into are Scandinavian Airlines and Finnair, starting at £475 and £504 round-trip. These flights start at 87% 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 Delta, which is currently one of the cheapest options available, starting at £751. British Airways flights start at £760 while deals on Lufthansa start at £784 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 City - Lambert-St Louis as they are the most popular.

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

American Airlines, Air Canada and Finnair are the most popular airlines when flying from London to St. Louis.

Where are the most common stopover locations when flying from London to St. Louis?

The most popular stopover on flights from London to St. Louis is Chicago.

Where are the least popular stopover locations for London to St. Louis flights?

London to St. Louis flights have a stopover in Philadelphia the least frequently.

What are some popular things to do or see while on a stopover in Chicago?

Grant Park, Magnificent Mile, and River North are currently the most popular points of interest in Chicago at the moment. Grant Park, Magnificent Mile, and River North are located about 16.2 mi, 15.5 mi, and 15.0 mi, respectively from Chicago O'Hare Intl. Travellers in need of a car in Chicago can hire one for about £40 per day.

What is the cheapest day to fly round-trip from London to St. Louis?

Tuesday is generally a great day to depart. Flying on this day could help you save up to 19%.

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

Users have found that booking a flight from London to St. Louis at least 14 days early can save you up to 56% on average compared to booking a flight this week. If booking 14 days before your flight isn’t an option for you, users have found flights from London to St. Louis for as little as £506 when booking for a departure date within the next two weeks. You can also check prices now. Some users have found airline tickets as low as £791 for flights departing within the next 3 days.

What is the cheapest month to fly from London to St. Louis?

Due to multiple factors, expect to potentially pay more when booking in December. For low rates, March can be a great choice for travel to St. Louis. Flights to St. Louis from London in March are about £716 on average during March, but can be found for as low as £484.

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.

£315+ Cheap Flights from London to St. Louis

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

Airfare is typical for this route at the moment. London to St. Louis flights typically cost between £576 and £740 in November. The cheapest return flight price found within the last 3 days was £594 on Scandinavian Airlines (24 Nov-1 Dec).

Cheapflights Tip: The best prices from London to Lambert-St Louis are usually found in March or January, booked 13 days in advance, depart on a Wednesday or Monday and return on a Wednesday

Cheap flight deals from London to St. Louis

Round-trip from	£594
One-way from	£315
Popular in	December
Cheapest in	March
Average price	£672

Scandinavian Airlines
24/11-1/12
4 total stops
47h 03m total
London to St. Louis

Search Deals

8/10
2 total stops
26h 02m total
London to St. Louis

Search Deals

Highest demand for flights based on searches. 2% potential increase in price (£16 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease (£21 potential savings vs. average return price).

Search Deals

Average for round-trip flights in September 2025

Search Deals

Find flight deals from London to St. Louis

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 12 September 2025.

Mon 24/1106:40LHR - STL

2 stops21h 18mScandinavian Airlines

Mon 1/1213:55STL - LHR

2 stops25h 45mScandinavian Airlines

Deal found 10/9£594

Thu 6/1107:05LHR - STL

3 stops20h 33mScandinavian Airlines

Mon 10/1111:44STL - LHR

2 stops22h 16mScandinavian Airlines

Deal found 11/9£596

Thu 6/1114:00LGW - STL

2 stops25h 07mMultiple Airlines

Mon 10/1114:12STL - LGW

1 stop13h 48mMultiple Airlines

Deal found 11/9£604

Wed 8/1014:00LGW - STL

2 stops26h 02mMultiple Airlines

Wed 15/1013:30STL - LGW

3 stops24h 10mMultiple Airlines

Deal found 10/9£608

Wed 8/1006:50LHR - STL

2 stops19h 07mAir Canada

Wed 15/1013:30STL - LHR

1 stop11h 00mAir Canada

Deal found 10/9£634

Wed 8/1011:45LHR - STL

1 stop11h 44mVirgin Atlantic

Wed 15/1013:40STL - LHR

1 stop11h 35mVirgin Atlantic

Deal found 10/9£636

Sat 11/1014:00LGW - STL

1 stop28h 46mMultiple Airlines

Sat 25/1016:33STL - LGW

2 stops32h 27mMultiple Airlines

Deal found 11/9£638

Fri 31/1006:00LHR - STL

2 stops22h 42mAustrian Airlines

Thu 13/1111:49STL - LHR

1 stop17h 16mAustrian Airlines

Deal found 10/9£642

Fri 31/1006:30LHR - STL

1 stop13h 25mLufthansa

Thu 13/1113:10STL - LHR

1 stop11h 30mLufthansa

Deal found 10/9£643

Thu 6/1119:30LHR - STL

1 stop24h 25mLufthansa

Mon 10/1118:43STL - LHR

1 stop10h 32mLufthansa

Deal found 11/9£645

Mon 24/1111:05LHR - STL

1 stop18h 18mVirgin Atlantic

Mon 1/1211:44STL - LHR

1 stop12h 41mVirgin Atlantic

Deal found 11/9£645

Sun 2/1107:30LHR - STL

2 stops18h 09mUnited Airlines

Sun 9/1111:05STL - LHR

2 stops13h 35mUnited Airlines

Deal found 11/9£646

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 12 September 2025.

Mon 24/1106:40LHR - STL

2 stops21h 18mScandinavian Airlines

Mon 1/1213:55STL - LHR

2 stops25h 45mScandinavian Airlines

Deal found 10/9£594

Wed 8/1014:00LGW - STL

2 stops26h 02mMultiple Airlines

Wed 15/1013:30STL - LGW

3 stops24h 10mMultiple Airlines

Deal found 10/9£608

Wed 8/1011:45LHR - STL

1 stop11h 44mVirgin Atlantic

Wed 15/1013:40STL - LHR

1 stop11h 35mVirgin Atlantic

Deal found 10/9£636

Fri 31/1006:30LHR - STL

1 stop13h 25mLufthansa

Thu 13/1113:10STL - LHR

1 stop11h 30mLufthansa

Deal found 10/9£643

Sat 31/106:35LHR - STL

2 stops20h 23mUnited Airlines

Mon 16/210:30STL - LHR

1 stop13h 25mUnited Airlines

Deal found 12/9£645

Thu 5/311:20LGW - STL

2 stops30h 51mAmerican Airlines

Mon 9/305:30STL - LGW

2 stops22h 30mAmerican Airlines

Deal found 9/9£667

Sat 8/1108:40LCY - STL

2 stops18h 20mBritish Airways

Sat 22/1110:44STL - LCY

2 stops21h 06mBritish Airways

Deal found 10/9£876

Thu 6/1107:05LHR - STL

3 stops20h 33mScandinavian Airlines

Mon 10/1111:44STL - LHR

2 stops22h 16mScandinavian Airlines

Deal found 11/9£596

Sun 2/1108:30LHR - STL

2 stops17h 09mUnited Airlines

Sun 9/1108:00STL - LHR

1 stop15h 55mUnited Airlines

Deal found 11/9£646

Mon 24/1110:45LHR - STL

1 stop17h 13mVirgin Atlantic

Mon 1/1214:36STL - LHR

1 stop12h 09mVirgin Atlantic

Deal found 10/9£646

Wed 15/1014:00LGW - STL

2 stops26h 02mMultiple Airlines

Sat 18/1019:15STL - LGW

3 stops32h 30mMultiple Airlines

Deal found 11/9£650

Wed 8/1008:30LHR - STL

2 stops15h 47mUnited Airlines

Wed 15/1011:10STL - LHR

2 stops14h 05mUnited Airlines

Deal found 10/9£647

Last-minute flights from London to St. Louis
Discover last-minute flight deals from London to St. Louis. Data last updated 12 September 2025 and is based on user searches.

Thu 18/910:30LHR - STL

2 stops15h 27mMultiple Airlines

Thu 25/909:15STL - LHR

1 stop15h 20mMultiple Airlines

Deal found 11/9£647

Wed 1/1006:50LHR - STL

2 stops14h 54mUnited Airlines

Sun 5/1012:25STL - LHR

2 stops15h 10mUnited Airlines

Deal found 10/9£648

Wed 8/1014:00LGW - STL

2 stops26h 02mMultiple Airlines

Wed 15/1013:30STL - LGW

3 stops24h 10mMultiple Airlines

Deal found 10/9£608

Wed 8/1006:50LHR - STL

2 stops19h 07mAir Canada

Wed 15/1013:30STL - LHR

1 stop11h 00mAir Canada

Deal found 10/9£634

Wed 8/1011:45LHR - STL

1 stop11h 44mVirgin Atlantic

Wed 15/1013:40STL - LHR

1 stop11h 35mVirgin Atlantic

Deal found 10/9£636

Wed 8/1010:30LHR - STL

2 stops15h 27mMultiple Airlines

Wed 15/1009:15STL - LHR

2 stops15h 15mMultiple Airlines

Deal found 10/9£647

Fri 10/1014:00LGW - STL

1 stop31h 38mMultiple Airlines

Sat 25/1016:33STL - LGW

2 stops32h 27mMultiple Airlines

Deal found 11/9£653

Sat 11/1014:00LGW - STL

1 stop28h 46mMultiple Airlines

Sat 25/1016:33STL - LGW

2 stops32h 27mMultiple Airlines

Deal found 11/9£638

Wed 15/1014:00LGW - STL

2 stops26h 02mMultiple Airlines

Sat 18/1019:15STL - LGW

3 stops32h 30mMultiple Airlines

Deal found 11/9£650

Mon 27/1010:20LHR - STL

2 stops39h 33mFinnair

Mon 3/1113:20STL - LHR

1 stop13h 15mFinnair

Deal found 12/9£659

Fri 31/1006:00LHR - STL

2 stops22h 42mAustrian Airlines

Thu 13/1111:49STL - LHR

1 stop17h 16mAustrian Airlines

Deal found 10/9£642

Fri 31/1006:30LHR - STL

1 stop13h 25mLufthansa

Thu 13/1113:10STL - LHR

1 stop11h 30mLufthansa

Deal found 10/9£643

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 12 September 2025.

Wed 8/1014:00LGW - STL

2 stops26h 02mMultiple Airlines

Deal found 9/9£315

Tue 16/1209:55LHR - STL

3 stops42h 51mMultiple Airlines

Deal found 10/9£329

Sun 5/1014:00LGW - STL

2 stops49h 07mMultiple Airlines

Deal found 10/9£353

Mon 17/1118:30LHR - STL

3 stops44h 37mMultiple Airlines

Deal found 11/9£358

Sun 16/1113:00LGW - STL

3 stops50h 07mMultiple Airlines

Deal found 11/9£367

Fri 12/1214:50LHR - STL

3 stops25h 12mMultiple Airlines

Deal found 10/9£371

Wed 8/1006:15LTN - STL

3 stops34h 22mMultiple Airlines

Deal found 9/9£372

Fri 17/1010:45LGW - STL

3 stops35h 11mMultiple Airlines

Deal found 11/9£379

Sun 28/914:00LGW - STL

1 stop29h 02mMultiple Airlines

Deal found 11/9£381

Mon 3/1112:10LHR - STL

3 stops50h 57mMultiple Airlines

Deal found 12/9£382

Sun 5/1006:50LTN - STL

3 stops38h 14mMultiple Airlines

Deal found 10/9£394

Sun 16/1121:50LTN - STL

3 stops41h 17mMultiple Airlines

Deal found 11/9£404

Fly from

Fly to

Route

Depart

Return

Price

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 24/11

06:40-21:58

2 stops21h 18m

Lambert-St Louis

Mon 1/12

13:55-21:40

2 stops25h 45m

£594

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Thu 6/11

07:05-21:38

3 stops20h 33m

Lambert-St Louis

Mon 10/11

11:44-16:00

2 stops22h 16m

£596

LondonSt. Louis

LGW - STL

LGWSTL

London Gatwick

Wed 8/10

14:00-10:02

2 stops26h 02m

Lambert-St Louis

Wed 15/10

13:30-19:40

3 stops24h 10m

£608

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 8/10

11:45-17:29

1 stop11h 44m

Lambert-St Louis

Wed 15/10

13:40-07:15

1 stop11h 35m

£636

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Fri 31/10

06:30-14:55

1 stop13h 25m

Lambert-St Louis

Thu 13/11

13:10-06:40

1 stop11h 30m

£643

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Sat 31/1

06:35-20:58

2 stops20h 23m

Lambert-St Louis

Mon 16/2

10:30-05:55

1 stop13h 25m

£645

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Sun 2/11

08:30-19:39

2 stops17h 09m

Lambert-St Louis

Sun 9/11

08:00-05:55

1 stop15h 55m

£646

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 24/11

10:45-21:58

1 stop17h 13m

Lambert-St Louis

Mon 1/12

14:36-08:45

1 stop12h 09m

£646

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 8/10

08:30-18:17

2 stops15h 47m

Lambert-St Louis

Wed 15/10

11:10-07:15

2 stops14h 05m

£647

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Thu 20/11

07:30-19:39

2 stops18h 09m

Lambert-St Louis

Mon 8/12

13:00-07:10

2 stops12h 10m

£647

Flights are sorted by cheapest return flights first.

Deals found on 9/9

Showing 1-10 of 60 results

...

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.

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

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 13 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.

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 £722). Flying from London to St. Louis in December is currently the most expensive (average of £1,033). 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?

It’s typically best to fly out from London to St. Louis in the evening. Doing so could potentially save you 16% on the flight price compared to flying in the morning, which is usually more expensive.

What is the cheapest day to fly from London to St. Louis?

Travellers seeking maximum savings on their London to St. Louis flight should consider departing on Tuesday evenings when fares are most often at their lowest. Sunday at midday flights should be avoided if possible as fares are typically the most expensive at this time.

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

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

Chicago (ORD) – chosen by Cheapflights users on 60% of one-stop itineraries from London to St. Louis on Cheapflights.

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

Dublin (DUB) is the most affordable one-stop option, with an average return flight price of £392.

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 25m.

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 1h 03m.

Reviews of airlines servicing St. Louis

See what other customers who have flown with Finnair, Air Canada, andIberia 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.

Finnair

7.6

Good

1,323 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.

Finnair

7.6

Good

1,323 reviews

Finnair

7.6

Good

1,323 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

Air Canada

7.1

Good

10,000 reviews

Finnair

7.6

Good

1,323 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

Iberia

7.0

Good

2,929 reviews

Finnair

7.6

Good

1,323 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

Lufthansa

6.8

Okay

7,409 reviews

Finnair

7.6

Good

1,323 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

British Airways

6.7

Okay

7,361 reviews

Finnair

7.6

Good

1,323 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

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 £636, Scandinavian Airlines can have you in St. Louis from London in 11h 44m. 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 £87 on this airline. Additional options worth looking into are Scandinavian Airlines and Finnair, starting at £475 and £504 round-trip. These flights start at 87% 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 Delta, which is currently one of the cheapest options available, starting at £751. British Airways flights start at £760 while deals on Lufthansa start at £784 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 City - Lambert-St Louis as they are the most popular.
Where are the most common stopover locations when flying from London to St. Louis?
The most popular stopover on flights from London to St. Louis is Chicago.
What are some popular things to do or see while on a stopover in Chicago?
Grant Park, Magnificent Mile, and River North are currently the most popular points of interest in Chicago at the moment. Grant Park, Magnificent Mile, and River North are located about 16.2 mi, 15.5 mi, and 15.0 mi, respectively from Chicago O'Hare Intl. Travellers in need of a car in Chicago can hire one for about £40 per day.
Where are the least popular stopover locations for London to St. Louis flights?
London to St. Louis flights have a stopover in Philadelphia the least frequently.
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 £722). Flying from London to St. Louis in December is currently the most expensive (average of £1,033). 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

Fly from London to St. Louis on these airlines

Finnair flights from London to Lambert-St Louis

British Airways flights from London to Lambert-St Louis

Virgin Atlantic flights from London to Lambert-St Louis

Alternative routes for London to St. Louis

Complete your trip

St. Louis car hire

Lambert-St Louis Airport car hire

Springfield Capital Airport car hire

Belleville Airport car hire

Marion Williamson County Airport car hire

Central West End car hire

Midtown car hire

Soulard car hire

Direct flights to United States

Top 10 airlines flying from London to St. Louis

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	Cheapest£87	Average£759	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
Scandinavian Airlines	Cheapest£475	Average£614	FlexibilityNo cancel fee	On-time77%	Search Scandinavian Airlines flights
Finnair	Cheapest£504	Average£641	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
Air Canada	Cheapest£599	Average£747	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
United Airlines	Cheapest£610	Average£792	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Iberia	Cheapest£620	Average£715	FlexibilityNo cancel fee	On-time77%	Search Iberia flights
British Airways	Cheapest£627	Average£802	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Lufthansa	Cheapest£667	Average£794	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
Virgin Atlantic	Cheapest£669	Average£840	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
KLM	Cheapest£710	Average£873	FlexibilityNo cancel fee	On-time75%	Search KLM 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.

Can Cheapflights notify me if prices for flights from London to St. Louis become cheaper?

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 £315

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 8/10. Fares are subject to change and may not be available on all flights or dates of travel.

Cheapflights Tip: The best prices from London to Lambert-St Louis are usually found in March or January, booked 13 days in advance, depart on a Wednesday or Monday and return on a Wednesday

Cheap flight deals from London to St. Louis

Round-trip from

One-way from

Popular in

Cheapest in

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Find 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 12 September 2025.

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 12 September 2025.

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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

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

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

Use this chart to determine the optimal time to book a return flight from London to St. Louis. Price data was last updated on 29 August 2025.

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 12 September 2025.

What is the cheapest day to fly from London to St. Louis?

Use this chart to determine the cheapest time to fly return from London to St. Louis. Price data was last updated on 16 December 2024.

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

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.

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.

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.

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.

Reviews of airlines servicing St. Louis

See what other customers who have flown with Finnair, Air Canada, andIberia 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

Find useful and relevant information for your journey from London to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

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?

Where are the most common stopover locations when flying from London to St. Louis?

What are some popular things to do or see while on a stopover in Chicago?

Where are the least popular stopover locations for London to St. Louis flights?

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?

Browse thousands of different options on Cheapflights for your next trip

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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 12 September 2025.

Top 10 airlines flying from London to St. Louis

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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 12 September 2025.