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

A quick flight from London to St. Louis can take about 16h 23m. Scandinavian Airlines provides one of the quickest options available for as low as $931. There are 4205 mi between London and St. Louis. This flight may include one or multiple stops.

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

Our cheapest airline available from London to St. Louis is British Airways. Our recent data shows that you can find tickets from as low as $555 on this airline. Additional options worth looking into are Lufthansa and United Airlines, starting at $925 and $952 round-trip. British Airways is currently priced 42% below the average price you’ll pay for this route.

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

Travelers seeking maximum savings on their London to St. Louis flight should consider departing on Wednesday at noon when fares are most often at their lowest. Monday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.

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 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

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

While some choose either London Gatwick - Lambert-St Louis or London City - Lambert-St Louis, London Heathrow - Lambert-St Louis is the most popular route from London to St. Louis.

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

When booking a flight from London to St. Louis, you may want to consider flying on British Airways, Lufthansa or United Airlines as they are the most popular for this route.

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

Leaving on a Tuesday is a viable option for saving on travel. Heavily demanded days of the week can typically drive up the prices you see. Booking your travel for a less competitive day can save up to 44% on the overall cost on flights from London to St. Louis.

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

Find a great deal and save up to 56% by booking at least 14 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from London to St. Louis within the next two weeks, with the cheapest ticket starting at $686.

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

The best pricing can be found in the month of March. Prices to St. Louis from London average $970. You can even find prices in March for less than $970, as users have found deals to St. Louis from as low as $656. The month of December appears to be one of the more expensive times to travel to St. Louis from London. Flying in the targeted month can save you up to 41%.

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

If you book a flight to St. Louis from London, you will be flying to Lambert-St Louis, which is the city’s only airport. Lambert-St Louis (STL) is located 12.7 mi from the center of St. Louis. There are 0 flights from London to Lambert-St Louis per day from 3 different airlines.

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 vacation 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.

$410+ Cheap Flights from London to St. Louis

Q: How much does it cost to fly round-trip from London to St. Louis?

Airfare is typical for this route at the moment. London to St. Louis flights typically cost between $780 and $1,002 in November. The cheapest round-trip price found within the last 3 days was $805 on Scandinavian Airlines (Nov 24-Dec 1).

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1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

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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 Thursday and return on a Wednesday

Cheap flight deals from London to St. Louis

Round-trip from	$805 (Scandinavian Airlines)
One-way from	$410 (Kiwi.com)
Popular in	December
Cheapest in	March
Average price	$910

From London (LON) to Lambert-St Louis

Search Deals

One-way flight from London (LON) to Lambert-St Louis

Search Deals

Highest demand for flights based on searches. 3% potential increase in price ($29 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease ($37 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in September 2025

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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 September 11, 2025.

Mon 11/246:40 amLHR - STL

2 stops21h 18mScandinavian Airlines

Mon 12/11:55 pmSTL - LHR

2 stops25h 45mScandinavian Airlines

Deal found 9/10

$805

Thu 11/67:05 amLHR - STL

3 stops20h 33mScandinavian Airlines

Mon 11/1011:44 amSTL - LHR

2 stops22h 16mScandinavian Airlines

Deal found 9/11

$807

Fri 10/319:05 pmLHR - STL

3 stops29h 59mScandinavian Airlines

Thu 11/1311:44 amSTL - LHR

2 stops27h 56mScandinavian Airlines

Deal found 9/9

$812

Thu 11/62:00 pmLGW - STL

2 stops25h 07mMultiple Airlines

Mon 11/102:12 pmSTL - LGW

1 stop13h 48mMultiple Airlines

Deal found 9/11

$818

Wed 10/82:00 pmLGW - STL

2 stops26h 02mMultiple Airlines

Wed 10/151:30 pmSTL - LGW

3 stops24h 10mMultiple Airlines

Deal found 9/10

$823

Fri 10/246:40 amLHR - STL

2 stops20h 48mScandinavian Airlines

Fri 10/315:15 pmSTL - LHR

2 stops17h 45mScandinavian Airlines

Deal found 9/9

$851

Wed 12/36:30 amLHR - STL

1 stop13h 25mLufthansa

Thu 1/151:00 pmSTL - LHR

1 stop11h 40mLufthansa

Deal found 9/9

$854

Wed 10/86:50 amLHR - STL

2 stops19h 07mAir Canada

Wed 10/151:30 pmSTL - LHR

1 stop11h 00mAir Canada

Deal found 9/10

$859

Wed 10/811:45 amLHR - STL

1 stop11h 44mVirgin Atlantic

Wed 10/151:40 pmSTL - LHR

1 stop11h 35mVirgin Atlantic

Deal found 9/10

$861

Sat 10/112:00 pmLGW - STL

1 stop28h 46mMultiple Airlines

Sat 10/254:33 pmSTL - LGW

2 stops32h 27mMultiple Airlines

Deal found 9/11

$864

Fri 10/316:00 amLHR - STL

2 stops22h 42mAustrian Airlines

Thu 11/1311:49 amSTL - LHR

1 stop17h 16mAustrian Airlines

Deal found 9/9

$867

Fri 10/316:30 amLHR - STL

1 stop13h 25mMultiple Airlines

Thu 11/1311:49 amSTL - LHR

1 stop14h 36mMultiple Airlines

Deal found 9/9

$869

Best flights from London to St. Louis
Discover carefully curated flight deals from London to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 11, 2025.

Mon 11/246:40 amLHR - STL

2 stops21h 18mScandinavian Airlines

Mon 12/11:55 pmSTL - LHR

2 stops25h 45mScandinavian Airlines

Deal found 9/10

$805

Wed 10/82:00 pmLGW - STL

2 stops26h 02mMultiple Airlines

Wed 10/151:30 pmSTL - LGW

3 stops24h 10mMultiple Airlines

Deal found 9/10

$823

Wed 12/36:30 amLHR - STL

1 stop13h 25mLufthansa

Thu 1/151:00 pmSTL - LHR

1 stop11h 40mLufthansa

Deal found 9/9

$854

Wed 10/811:45 amLHR - STL

1 stop11h 44mVirgin Atlantic

Wed 10/151:40 pmSTL - LHR

1 stop11h 35mVirgin Atlantic

Deal found 9/10

$861

Sun 11/28:30 amLHR - STL

2 stops17h 09mUnited Airlines

Sun 11/98:00 amSTL - LHR

1 stop15h 55mUnited Airlines

Deal found 9/11

$875

Thu 3/511:20 amLGW - STL

2 stops30h 51mAmerican Airlines

Mon 3/95:30 amSTL - LGW

2 stops22h 30mAmerican Airlines

Deal found 9/9

$904

Sat 11/88:40 amLCY - STL

2 stops18h 20mBritish Airways

Sat 11/2210:44 amSTL - LCY

2 stops21h 06mBritish Airways

Deal found 9/10

$1,187

Sat 11/86:25 amLGW - STL

2 stops39h 21mTurkish Airlines

Sat 11/225:24 pmSTL - LGW

2 stops23h 11mTurkish Airlines

Deal found 9/10

$1,419

Thu 11/67:05 amLHR - STL

3 stops20h 33mScandinavian Airlines

Mon 11/1011:44 amSTL - LHR

2 stops22h 16mScandinavian Airlines

Deal found 9/11

$807

Fri 10/316:30 amLHR - STL

1 stop13h 25mMultiple Airlines

Thu 11/1311:49 amSTL - LHR

1 stop14h 36mMultiple Airlines

Deal found 9/9

$869

Fri 10/316:30 amLHR - STL

1 stop13h 25mLufthansa

Thu 11/131:10 pmSTL - LHR

1 stop11h 30mLufthansa

Deal found 9/10

$871

Fri 1/97:30 amLHR - STL

2 stops15h 55mUnited Airlines

Fri 1/169:57 amSTL - LHR

1 stop13h 58mUnited Airlines

Deal found 9/9

$875

Last-minute flights from London to St. Louis
Discover last-minute flight deals from London to St. Louis. Data last updated September 11, 2025 and is based on user searches.

Thu 9/1810:30 amLHR - STL

2 stops15h 27mMultiple Airlines

Thu 9/259:15 amSTL - LHR

1 stop15h 20mMultiple Airlines

Deal found 9/11

$876

Wed 10/16:50 amLHR - STL

2 stops14h 54mUnited Airlines

Sun 10/51:05 pmSTL - LHR

1 stop11h 50mUnited Airlines

Deal found 9/10

$878

Wed 10/82:00 pmLGW - STL

2 stops26h 02mMultiple Airlines

Wed 10/151:30 pmSTL - LGW

3 stops24h 10mMultiple Airlines

Deal found 9/10

$823

Wed 10/86:50 amLHR - STL

2 stops19h 07mAir Canada

Wed 10/151:30 pmSTL - LHR

1 stop11h 00mAir Canada

Deal found 9/10

$859

Wed 10/811:45 amLHR - STL

1 stop11h 44mVirgin Atlantic

Wed 10/151:40 pmSTL - LHR

1 stop11h 35mVirgin Atlantic

Deal found 9/10

$861

Wed 10/810:30 amLHR - STL

2 stops15h 27mMultiple Airlines

Wed 10/159:15 amSTL - LHR

2 stops15h 15mMultiple Airlines

Deal found 9/10

$877

Sat 10/112:00 pmLGW - STL

1 stop28h 46mMultiple Airlines

Sat 10/254:33 pmSTL - LGW

2 stops32h 27mMultiple Airlines

Deal found 9/11

$864

Fri 10/246:40 amLHR - STL

2 stops20h 48mScandinavian Airlines

Fri 10/315:15 pmSTL - LHR

2 stops17h 45mScandinavian Airlines

Deal found 9/9

$851

Fri 10/319:05 pmLHR - STL

3 stops29h 59mScandinavian Airlines

Thu 11/1311:44 amSTL - LHR

2 stops27h 56mScandinavian Airlines

Deal found 9/9

$812

Fri 10/316:00 amLHR - STL

2 stops22h 42mAustrian Airlines

Thu 11/1311:49 amSTL - LHR

1 stop17h 16mAustrian Airlines

Deal found 9/9

$867

Fri 10/316:30 amLHR - STL

1 stop13h 25mMultiple Airlines

Thu 11/1311:49 amSTL - LHR

1 stop14h 36mMultiple Airlines

Deal found 9/9

$869

Fri 10/316:30 amLHR - STL

1 stop13h 25mLufthansa

Thu 11/131:10 pmSTL - LHR

1 stop11h 30mLufthansa

Deal found 9/10

$871

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 September 11, 2025.

Sat 12/138:50 amSTN - STL

3 stops38h 41mMultiple Airlines

Deal found 9/9

$410

Wed 10/82:00 pmLGW - STL

2 stops26h 02mMultiple Airlines

Deal found 9/9

$426

Tue 12/169:55 amLHR - STL

3 stops42h 51mMultiple Airlines

Deal found 9/9

$441

Sat 12/139:55 amLHR - STL

3 stops37h 36mMultiple Airlines

Deal found 9/9

$458

Fri 12/122:50 pmLHR - STL

3 stops25h 12mMultiple Airlines

Deal found 9/9

$478

Sun 10/52:00 pmLGW - STL

2 stops49h 07mMultiple Airlines

Deal found 9/10

$478

Mon 11/176:30 pmLHR - STL

3 stops44h 37mMultiple Airlines

Deal found 9/11

$485

Sun 11/161:00 pmLGW - STL

3 stops50h 07mMultiple Airlines

Deal found 9/11

$497

Wed 10/86:15 amLTN - STL

3 stops34h 22mMultiple Airlines

Deal found 9/9

$504

Fri 10/1710:45 amLGW - STL

3 stops35h 11mMultiple Airlines

Deal found 9/11

$513

Sun 9/282:00 pmLGW - STL

1 stop29h 02mMultiple Airlines

Deal found 9/11

$516

Sun 10/54:25 pmSTN - STL

3 stops46h 42mMultiple Airlines

Deal found 9/9

$530

Fly from

Fly to

Route

Depart

Return

Price

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 11/24

6:40 am-9:58 pm

2 stops21h 18m

Lambert-St Louis

Mon 12/1

1:55 pm-9:40 pm

2 stops25h 45m

$805

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Thu 11/6

7:05 am-9:38 pm

3 stops20h 33m

Lambert-St Louis

Mon 11/10

11:44 am-4:00 pm

2 stops22h 16m

$807

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Fri 10/31

9:05 pm-10:04 pm

3 stops29h 59m

Lambert-St Louis

Thu 11/13

11:44 am-9:40 pm

2 stops27h 56m

$812

LondonSt. Louis

LGW - STL

LGWSTL

London Gatwick

Wed 10/8

2:00 pm-10:02 am

2 stops26h 02m

Lambert-St Louis

Wed 10/15

1:30 pm-7:40 pm

3 stops24h 10m

$823

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Fri 10/24

6:40 am-9:28 pm

2 stops20h 48m

Lambert-St Louis

Fri 10/31

5:15 pm-4:00 pm

2 stops17h 45m

$851

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 12/3

6:30 am-1:55 pm

1 stop13h 25m

Lambert-St Louis

Thu 1/15

1:00 pm-6:40 am

1 stop11h 40m

$854

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 10/8

11:45 am-5:29 pm

1 stop11h 44m

Lambert-St Louis

Wed 10/15

1:40 pm-7:15 am

1 stop11h 35m

$861

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Fri 10/31

6:30 am-2:55 pm

1 stop13h 25m

Lambert-St Louis

Thu 11/13

11:49 am-8:25 am

1 stop14h 36m

$869

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Fri 10/31

6:30 am-2:55 pm

1 stop13h 25m

Lambert-St Louis

Thu 11/13

1:10 pm-6:40 am

1 stop11h 30m

$871

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Sun 11/2

8:30 am-7:39 pm

2 stops17h 09m

Lambert-St Louis

Sun 11/9

8:00 am-5:55 am

1 stop15h 55m

$875

Flights are sorted by cheapest round-trip 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 round-trip 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?

Booking 13 days in advance of your planned departure date is, on average, the best time to get cheap flights from London to St. Louis. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, August is the cheapest month in which you can book a flight from London to St. Louis (average of $311). Flying from London to St. Louis in March is currently the most expensive (average of $356). 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?

A simple way to save on the total cost of your ticket is to fly from London to St. Louis at noon. If you’re flexible enough to do this you can expect to save up to 13% on your trip compared to booking a flight in the morning.

How much does it cost to fly round-trip from London to St. Louis?

Reviews of airlines servicing St. Louis

Get a feel of what it's like to fly with British Airways from London to St. Louis by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

British Airways

6.7

Okay

7,361 reviews

Reviews

1 / 20

6.0

Good

Anonymous,May 2025

LHR - LAX

We needed assistance (wheelchair, golf cart, whatever ) to get to next gate. We requested it. None was provided.

British Airways

6.7

Okay

7,361 reviews

British Airways

6.7

Okay

7,361 reviews

Reviews

1 / 20

6.0

Good

Anonymous,May 2025

LHR - LAX

We needed assistance (wheelchair, golf cart, whatever ) to get to next gate. We requested it. None was provided.

Related info for your journey

What airport do you fly into for flights to St. Louis from London?
If you book a flight to St. Louis from London, you will be flying to Lambert-St Louis, which is the city’s only airport. Lambert-St Louis (STL) is located 12.7 mi from the center of St. Louis. There are 0 flights from London to Lambert-St Louis per day from 3 different airlines.
How long is the flight from London to St. Louis?
A quick flight from London to St. Louis can take about 16h 23m. Scandinavian Airlines provides one of the quickest options available for as low as $931. There are 4205 mi between London and St. Louis. This flight may include one or multiple stops.
What are the cheapest airlines flying from London to St. Louis round-trip?
Our cheapest airline available from London to St. Louis is British Airways. Our recent data shows that you can find tickets from as low as $555 on this airline. Additional options worth looking into are Lufthansa and United Airlines, starting at $925 and $952 round-trip. British Airways is currently priced 42% below the average price you’ll pay for this route.
What are the most popular routes from London to St. Louis?
While some choose either London Gatwick - Lambert-St Louis or London City - Lambert-St Louis, London Heathrow - Lambert-St Louis is the most popular route from London to St. Louis.
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 vacation 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, August is the cheapest month in which you can book a flight from London to St. Louis (average of $311). Flying from London to St. Louis in March is currently the most expensive (average of $356). 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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Top 3 airlines flying from London to St. Louis

Airline	Cheapest	Average	Flexibility	On-time
British Airways	Cheapest$555	Average$1,063	FlexibilityNo cancel fee	On-time70%
Lufthansa	Cheapest$925	Average$925	FlexibilityNo cancel fee	On-time76%
United Airlines	Cheapest$952	Average$1,220	FlexibilityNo cancel fee	On-time69%

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$410+ Cheap flights from London (LON) to St. Louis (STL)

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 12/13. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from London to St. Louis with Cheapflights

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2. Select your favorite providers

3. Compare prices and book

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 Thursday and return on a Wednesday

Cheap flight deals from London to St. Louis

Round-trip from

One-way from

Popular in

Cheapest in

Average price

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 September 11, 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 September 11, 2025.

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

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 round-trip flight from London to St. Louis. Price data was last updated on August 29, 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 September 11, 2025.

How much does it cost to fly round-trip from London to St. Louis?

Reviews of airlines servicing St. Louis

Get a feel of what it's like to fly with British Airways from London to St. Louis by reading reviews from past customers. Users have also rated airlines 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 most popular routes 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?

Traveling to a place near St. Louis?

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Alternative routes for London to St. Louis

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Top 3 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 September 11, 2025.