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

Our cheapest airline available from London to St. Louis is United Airlines. Our recent data shows that you can find tickets from as low as $808 on this airline. Additional options worth looking into are Iberia and British Airways, starting at $875 and $898 round-trip. United Airlines is currently priced 13% below the average price you’ll pay for this route.

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

$624 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on Aer Lingus and British Airways, with prices starting from $882 and $902, respectively.

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.

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 American Airlines, British Airways or Lufthansa 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 31% 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 $935. You can even find prices in March for less than $935, 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 45%.

Most accurate provider : When it comes to deals on London-St. Louis flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on London-St. Louis flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from London-St. Louis flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on London-St. Louis flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for London-St. Louis flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 4 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.

$314+ Flights from London to St. Louis

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Find cheap flights from London to St. Louis with Cheapflights

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.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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

Most accurate provider	eDreams 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$757 (Kiwi.com)
One-way from	$314 (Trip.com)
Popular in	December
Cheapest in	March
Average price	$919

Provider with most accurate pricing for London (LON)-Lambert-St Louis flight deals.

Search Deals

Provider most trusted by Cheapflights users for London (LON)-Lambert-St Louis flights.

Search Deals

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. 5% potential increase in price ($50 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 4% potential price decrease ($39 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in April 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 April 17, 2025.

Mon 4/212:00 pmLGW - STL

1 stop15h 46mMultiple Airlines

Wed 4/305:41 pmSTL - LGW

1 stop34h 19mMultiple Airlines

Deal found 4/16

$697

Tue 5/68:00 amLHR - STL

2 stops20h 03mUnited Airlines

Mon 5/197:30 amSTL - LHR

2 stops17h 00mUnited Airlines

Deal found 4/16

$808

Wed 9/36:15 amLHR - STL

2 stops20h 08mIberia

Wed 9/242:42 pmSTL - LHR

1 stop11h 13mIberia

Deal found 4/17

$875

Tue 5/612:30 pmLHR - STL

1 stop14h 28mBritish Airways

Mon 5/197:30 pmSTL - LHR

1 stop10h 45mBritish Airways

Deal found 4/16

$898

Wed 9/38:20 pmSTN - STL

2 stops29h 13mMultiple Airlines

Wed 9/244:05 pmSTL - STN

2 stops21h 55mMultiple Airlines

Deal found 4/17

$913

Sat 5/316:40 amLHR - STL

2 stops35h 56mMultiple Airlines

Sat 6/77:30 amSTL - LHR

3 stops28h 10mMultiple Airlines

Deal found 4/16

$915

Wed 5/78:40 amLHR - STL

2 stops17h 18mAir Canada

Tue 5/131:30 pmSTL - LHR

1 stop11h 00mAir Canada

Deal found 4/16

$954

Sat 5/39:50 amLHR - STL

1 stop20h 09mFinnair

Sat 5/1010:36 amSTL - LHR

1 stop13h 49mFinnair

Deal found 4/17

$958

Tue 9/26:30 amLHR - STL

2 stops15h 14mLufthansa

Tue 9/235:30 pmSTL - LHR

2 stops17h 10mLufthansa

Deal found 4/17

$963

Mon 11/311:00 amLGW - STL

2 stops27h 43mIberia

Mon 11/242:49 pmSTL - LGW

2 stops22h 01mIberia

Deal found 4/17

$995

Wed 6/186:15 amLTN - STL

3 stops40h 49mMultiple Airlines

Thu 6/267:30 amSTL - LTN

2 stops32h 50mMultiple Airlines

Deal found 4/17

$1,006

Wed 6/186:40 amLHR - STL

2 stops23h 11mScandinavian Airlines

Thu 6/261:30 pmSTL - LHR

2 stops26h 10mScandinavian Airlines

Deal found 4/17

$1,042

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 April 17, 2025.

Wed 5/142:00 pmLGW - STL

1 stop16h 06mMultiple Airlines

Wed 5/215:45 pmSTL - LGW

1 stop34h 15mMultiple Airlines

Deal found 4/16

$757

Tue 5/68:00 amLHR - STL

2 stops20h 03mUnited Airlines

Mon 5/197:30 amSTL - LHR

1 stop22h 20mUnited Airlines

Deal found 4/16

$808

Wed 9/36:15 amLHR - STL

2 stops20h 08mIberia

Wed 9/242:42 pmSTL - LHR

1 stop11h 13mIberia

Deal found 4/17

$875

Tue 5/612:30 pmLHR - STL

1 stop14h 28mBritish Airways

Mon 5/197:30 pmSTL - LHR

1 stop10h 45mBritish Airways

Deal found 4/16

$898

Wed 5/78:40 amLHR - STL

2 stops17h 18mAir Canada

Tue 5/131:30 pmSTL - LHR

1 stop11h 00mAir Canada

Deal found 4/16

$954

Sat 5/39:50 amLHR - STL

1 stop20h 09mFinnair

Sat 5/1010:36 amSTL - LHR

1 stop13h 49mFinnair

Deal found 4/17

$958

Tue 9/26:30 amLHR - STL

2 stops15h 14mLufthansa

Tue 9/235:30 pmSTL - LHR

2 stops17h 10mLufthansa

Deal found 4/17

$963

Wed 6/186:40 amLHR - STL

2 stops23h 11mScandinavian Airlines

Thu 6/261:30 pmSTL - LHR

2 stops26h 10mScandinavian Airlines

Deal found 4/17

$1,042

Fri 9/56:30 amLHR - STL

2 stops15h 28mDelta

Thu 9/253:30 pmSTL - LHR

2 stops13h 55mDelta

Deal found 4/17

$1,060

Tue 6/109:20 amLCY - STL

2 stops17h 20mVirgin Atlantic

Tue 6/2410:30 amSTL - LCY

2 stops15h 40mVirgin Atlantic

Deal found 4/17

$1,197

Sun 9/78:10 pmLCY - STL

2 stops33h 29mKLM

Sun 9/287:05 pmSTL - LCY

2 stops15h 35mKLM

Deal found 4/16

$1,199

Tue 4/2911:30 amLHR - STL

2 stops18h 06mAir France

Sat 5/312:47 pmSTL - LHR

2 stops14h 03mAir France

Deal found 4/17

$1,261

Last-minute flights from London to St. Louis
Discover last-minute flight deals from London to St. Louis. Data last updated April 17, 2025 and is based on user searches.

Mon 4/212:00 pmLGW - STL

1 stop15h 46mMultiple Airlines

Wed 4/305:41 pmSTL - LGW

1 stop34h 19mMultiple Airlines

Deal found 4/16

$697

Fri 4/259:30 amLHR - STL

2 stops18h 39mUnited Airlines

Sun 5/111:30 pmSTL - LHR

1 stop11h 00mUnited Airlines

Deal found 4/16

$984

Fri 4/252:05 pmLHR - STL

2 stops30h 44mAir Canada

Sun 5/112:30 pmSTL - LHR

2 stops13h 30mAir Canada

Deal found 4/16

$1,021

Fri 4/2510:40 amLGW - STL

2 stops18h 53mAmerican Airlines

Sun 5/117:10 amSTL - LGW

2 stops17h 25mAmerican Airlines

Deal found 4/16

$1,283

Fri 4/256:40 amLHR - STL

3 stops19h 59mScandinavian Airlines

Sun 5/111:09 pmSTL - LHR

2 stops20h 51mScandinavian Airlines

Deal found 4/16

$1,583

Sat 4/262:00 pmLGW - STL

1 stop16h 04mMultiple Airlines

Sat 5/35:45 pmSTL - LGW

1 stop34h 25mMultiple Airlines

Deal found 4/17

$719

Sat 4/268:30 amLHR - STL

1 stop12h 19mMultiple Airlines

Sat 5/32:30 pmSTL - LHR

2 stops13h 30mMultiple Airlines

Deal found 4/17

$1,002

Sat 4/2612:10 pmLCY - STL

2 stops17h 26mKLM

Sat 5/34:15 pmSTL - LCY

2 stops19h 05mKLM

Deal found 4/17

$1,393

Sat 4/2612:00 pmLCY - STL

3 stops34h 45mMultiple Airlines

Sat 5/312:15 pmSTL - LCY

3 stops27h 05mMultiple Airlines

Deal found 4/17

$1,514

Sat 4/261:15 pmLTN - STL

2 stops30h 15mMultiple Airlines

Sat 5/31:30 pmSTL - LTN

3 stops27h 15mMultiple Airlines

Deal found 4/17

$2,207

Thu 5/112:30 pmLHR - STL

1 stop14h 28mIberia

Thu 5/87:30 pmSTL - LHR

1 stop10h 45mIberia

Deal found 4/16

$919

Sat 5/39:50 amLHR - STL

1 stop20h 09mFinnair

Sat 5/1010:36 amSTL - LHR

1 stop13h 49mFinnair

Deal found 4/17

$958

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 April 17, 2025.

Thu 5/82:00 pmLGW - STL

1 stop16h 06mMultiple Airlines

Deal found 4/16

$314

Thu 5/86:25 amSTN - STL

3 stops44h 40mMultiple Airlines

Deal found 4/16

$432

Wed 6/410:00 amLTN - STL

3 stops39h 43mMultiple Airlines

Deal found 4/17

$510

Thu 5/82:10 pmLHR - STL

2 stops36h 55mMultiple Airlines

Deal found 4/16

$532

Wed 6/42:10 pmLHR - STL

2 stops39h 28mWestJet

Deal found 4/17

$624

Tue 4/2910:45 amLGW - STL

3 stops28h 43mWestJet

Deal found 4/16

$695

Thu 5/86:45 amLCY - STL

3 stops20h 04mMultiple Airlines

Deal found 4/16

$735

Sat 4/267:40 amLHR - STL

2 stops16h 22mAer Lingus

Deal found 4/17

$882

Mon 4/2812:15 pmLHR - STL

1 stop15h 57mBritish Airways

Deal found 4/16

$902

Wed 6/49:15 amLHR - STL

1 stop18h 37mFinnair

Deal found 4/17

$903

Mon 4/286:45 amLCY - STL

2 stops22h 48mAer Lingus

Deal found 4/16

$944

Thu 5/812:15 pmLHR - STL

1 stop13h 08mLufthansa

Deal found 4/16

$1,058

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

LondonSt. Louis

LGW - STL

LGWSTL

London Gatwick

Wed 5/14

2:00 pm-12:06 am

1 stop16h 06m

Lambert-St Louis

Wed 5/21

5:45 pm-10:00 am

1 stop34h 15m

$757

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Tue 5/6

8:00 am-10:03 pm

2 stops20h 03m

Lambert-St Louis

Mon 5/19

7:30 am-6:30 am

2 stops17h 00m

$808

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 9/3

6:15 am-8:23 pm

2 stops20h 08m

Lambert-St Louis

Wed 9/24

2:42 pm-7:55 am

1 stop11h 13m

$875

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Tue 5/6

12:30 pm-8:58 pm

1 stop14h 28m

Lambert-St Louis

Mon 5/19

7:30 pm-12:15 pm

1 stop10h 45m

$898

LondonSt. Louis

STN - STL

STNSTL

London Stansted

Wed 9/3

8:20 pm-7:33 pm

2 stops29h 13m

Lambert-St Louis

Wed 9/24

4:05 pm-8:00 pm

2 stops21h 55m

$913

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Sat 5/31

6:40 am-12:36 pm

2 stops35h 56m

Lambert-St Louis

Sat 6/7

7:30 am-5:40 pm

3 stops28h 10m

$915

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 5/7

8:40 am-7:58 pm

2 stops17h 18m

Lambert-St Louis

Tue 5/13

1:30 pm-6:30 am

1 stop11h 00m

$954

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Sat 5/3

9:50 am-11:59 pm

1 stop20h 09m

Lambert-St Louis

Sat 5/10

10:36 am-6:25 am

1 stop13h 49m

$958

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Tue 9/2

6:30 am-3:44 pm

2 stops15h 14m

Lambert-St Louis

Tue 9/23

5:30 pm-4:40 pm

2 stops17h 10m

$963

LondonSt. Louis

LTN - STL

LTNSTL

London Luton

Wed 6/18

6:15 am-5:04 pm

3 stops40h 49m

Lambert-St Louis

Thu 6/26

7:30 am-10:20 pm

2 stops32h 50m

$1,006

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/16

Showing 1-10 of 49 results

...

Compare providers for flights from London to St. Louis

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from London to St. Louis in April.

Provider	Price Accuracy	Trust Score*
eDreams	Price Accuracy3 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*2 stars
Priceline	Price Accuracy1 star	Trust Score*3 stars
Expedia	Price Accuracy1 star	Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on London-St. Louis flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on London-St. Louis flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from London-St. Louis flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on London-St. Louis flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for London-St. Louis flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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.

Rainfall in St. Louis by month

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.

Temperature in St. Louis by month

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).

Reviews of airlines servicing St. Louis

See what other customers who have flown with Delta, KLM and Finnair from London to St. Louis have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

7,916 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Delta

8.0

Very good

7,916 reviews

Delta

8.0

Very good

7,916 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

KLM

7.8

Good

1,327 reviews

Delta

8.0

Very good

7,916 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Finnair

7.6

Good

1,269 reviews

Delta

8.0

Very good

7,916 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Austrian Airlines

7.6

Good

775 reviews

Delta

8.0

Very good

7,916 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Air France

7.5

Good

1,435 reviews

Delta

8.0

Very good

7,916 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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 4 different airlines.
What are the cheapest airlines flying from London to St. Louis round-trip?
Our cheapest airline available from London to St. Louis is United Airlines. Our recent data shows that you can find tickets from as low as $808 on this airline. Additional options worth looking into are Iberia and British Airways, starting at $875 and $898 round-trip. United Airlines is currently priced 13% below the average price you’ll pay for this route.
What are the cheapest airlines to fly from London to St. Louis one-way?
$624 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on Aer Lingus and British Airways, with prices starting from $882 and $902, respectively.
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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Other flights to St. Louis

Top 4 airlines flying from London to St. Louis

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	Cheapest$278	Average$1,357	FlexibilityNo cancel fee	On-time71%
United Airlines	Cheapest$867	Average$1,263	FlexibilityNo cancel fee	On-time69%
Lufthansa	Cheapest$925	Average$928	FlexibilityNo cancel fee	On-time76%
British Airways	Cheapest$997	Average$1,164	FlexibilityNo cancel fee	On-time70%

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$314+ 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 5/8. 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

1. Tell us where you want to go

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

Most accurate provider

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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 April 17, 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 April 17, 2025.

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

Compare providers for flights from London to St. Louis

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from London to St. Louis in April.

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 April 11, 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 April 17, 2025.

Rainfall in St. Louis by month

Plan your trip to St. Louis by taking into account the average rainfall totals by month.

Temperature in St. Louis by month

Plan your trip to St. Louis by taking into account the average temperature totals by month.

Reviews of airlines servicing St. Louis

See what other customers who have flown with Delta, KLM and Finnair from London to St. Louis have to say. Users can see the overall rating for each airline as well as how each is rated 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?

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?

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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Alternative routes for London to St. Louis

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Top 4 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 April 17, 2025.