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

Our cheapest airline available from London to St. Louis is Scandinavian Airlines. Our recent data shows that you can find tickets from as low as $900 on this airline. Additional options worth looking into are British Airways and Iberia, starting at $904 and $919 round-trip. Scandinavian Airlines is currently priced 4% below the average price you’ll pay for this route.

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

$898 is the cheapest one-way deal found within the past few days, from Aer Lingus. You may also be able to find cheap deals on Finnair and British Airways, with prices starting from $905 and $967, 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 47% 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 $938. You can even find prices in March for less than $938, 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.

$345+ Flights from London to St. Louis - Compare & Save Big

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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	$793 (Kiwi.com)
One-way from	$345 (Kiwi.com)
Popular in	December
Cheapest in	March
Average price	$937

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. 4% potential increase in price ($48 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 30, 2025.

Thu 5/82:00 pmLGW - STL

1 stop16h 06mMultiple Airlines

Sat 5/245:35 pmSTL - LGW

1 stop34h 35mMultiple Airlines

Deal found 4/28

$718

Thu 6/121:45 pmLHR - STL

3 stops33h 19mMultiple Airlines

Thu 6/196:12 pmSTL - LHR

3 stops30h 23mMultiple Airlines

Deal found 4/28

$862

Tue 5/67:30 pmLHR - STL

2 stops31h 28mBritish Airways

Mon 5/194:15 pmSTL - LHR

1 stop12h 15mBritish Airways

Deal found 4/28

$897

Thu 6/126:40 amLHR - STL

2 stops20h 54mScandinavian Airlines

Thu 6/191:30 pmSTL - LHR

2 stops23h 00mScandinavian Airlines

Deal found 4/28

$900

Thu 6/1212:30 pmLHR - STL

1 stop13h 49mIberia

Thu 6/191:21 pmSTL - LHR

1 stop11h 59mIberia

Deal found 4/27

$919

Sat 10/48:30 amLHR - STL

2 stops32h 04mLufthansa

Wed 10/2212:28 pmSTL - LHR

2 stops12h 27mLufthansa

Deal found 4/28

$920

Wed 9/38:30 amSTN - STL

2 stops17h 03mMultiple Airlines

Wed 9/244:05 pmSTL - STN

2 stops21h 55mMultiple Airlines

Deal found 4/29

$945

Tue 6/108:45 amLCY - STL

2 stops33h 51mMultiple Airlines

Tue 6/176:30 amSTL - LCY

3 stops30h 15mMultiple Airlines

Deal found 4/28

$975

Mon 5/55:40 pmLHR - STL

2 stops32h 18mAir Canada

Sun 5/181:30 pmSTL - LHR

1 stop11h 00mAir Canada

Deal found 4/28

$993

Mon 5/59:30 amLHR - STL

1 stop16h 28mUnited Airlines

Sun 5/181:30 pmSTL - LHR

1 stop11h 00mUnited Airlines

Deal found 4/28

$1,002

Tue 5/611:30 amLHR - STL

2 stops16h 06mVirgin Atlantic

Tue 5/1310:45 amSTL - LHR

2 stops14h 00mVirgin Atlantic

Deal found 4/29

$1,033

Fri 9/1210:40 amLGW - STL

2 stops18h 43mFinnair

Sat 9/2011:38 amSTL - LGW

2 stops14h 32mFinnair

Deal found 4/29

$1,062

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 30, 2025.

Thu 6/122:00 pmLGW - STL

1 stop15h 53mMultiple Airlines

Thu 6/195:47 pmSTL - LGW

1 stop34h 13mMultiple Airlines

Deal found 4/28

$793

Thu 6/126:40 amLHR - STL

2 stops20h 54mScandinavian Airlines

Thu 6/191:30 pmSTL - LHR

2 stops23h 00mScandinavian Airlines

Deal found 4/28

$900

Wed 9/36:30 amLHR - STL

2 stops19h 51mBritish Airways

Wed 9/108:01 pmSTL - LHR

1 stop10h 14mBritish Airways

Deal found 4/29

$904

Thu 6/1212:30 pmLHR - STL

1 stop13h 49mIberia

Thu 6/191:21 pmSTL - LHR

1 stop11h 59mIberia

Deal found 4/27

$919

Sat 10/48:30 amLHR - STL

2 stops33h 55mLufthansa

Wed 10/2212:28 pmSTL - LHR

1 stop11h 52mLufthansa

Deal found 4/28

$920

Fri 9/129:30 amLHR - STL

1 stop16h 27mAir Canada

Sat 9/201:30 pmSTL - LHR

1 stop14h 05mAir Canada

Deal found 4/29

$1,000

Fri 5/92:05 pmLHR - STL

1 stop11h 53mUnited Airlines

Tue 5/134:45 pmSTL - LHR

1 stop13h 35mUnited Airlines

Deal found 4/29

$1,007

Fri 9/1210:40 amLGW - STL

2 stops18h 43mFinnair

Sat 9/2011:38 amSTL - LGW

2 stops14h 32mFinnair

Deal found 4/29

$1,062

Mon 5/1910:40 amLGW - STL

2 stops19h 11mAmerican Airlines

Wed 5/289:36 amSTL - LGW

2 stops16h 59mAmerican Airlines

Deal found 4/28

$1,174

Mon 5/196:30 amLHR - STL

2 stops16h 05mDelta

Mon 6/21:09 pmSTL - LHR

2 stops15h 10mDelta

Deal found 4/28

$1,184

Wed 10/1512:00 pmLHR - STL

2 stops17h 25mAer Lingus

Sun 10/196:35 amSTL - LHR

2 stops21h 45mAer Lingus

Deal found 4/28

$1,193

Fri 9/129:20 amLCY - STL

2 stops19h 42mVirgin Atlantic

Sat 9/203:30 pmSTL - LCY

2 stops19h 50mVirgin Atlantic

Deal found 4/29

$1,290

Last-minute flights from London to St. Louis
Discover last-minute flight deals from London to St. Louis. Data last updated April 30, 2025 and is based on user searches.

Wed 4/301:25 pmLHR - STL

2 stops16h 08mAer Lingus

Wed 5/71:38 pmSTL - LHR

2 stops17h 47mAer Lingus

Deal found 4/29

$1,158

Mon 5/510:30 amLHR - STL

2 stops15h 28mMultiple Airlines

Mon 5/121:30 pmSTL - LHR

1 stop14h 30mMultiple Airlines

Deal found 4/28

$970

Mon 5/55:40 pmLHR - STL

2 stops32h 18mAir Canada

Sun 5/181:30 pmSTL - LHR

1 stop11h 00mAir Canada

Deal found 4/28

$993

Mon 5/59:30 amLHR - STL

1 stop16h 28mUnited Airlines

Sun 5/181:30 pmSTL - LHR

1 stop11h 00mUnited Airlines

Deal found 4/28

$1,002

Mon 5/51:25 pmLHR - STL

2 stops16h 26mAer Lingus

Mon 5/266:00 amSTL - LHR

2 stops21h 05mAer Lingus

Deal found 4/29

$1,321

Mon 5/52:25 pmLHR - STL

1 stop13h 27mIberia

Mon 5/261:45 pmSTL - LHR

1 stop13h 15mIberia

Deal found 4/29

$1,416

Tue 5/67:30 pmLHR - STL

2 stops31h 28mBritish Airways

Mon 5/194:15 pmSTL - LHR

1 stop12h 15mBritish Airways

Deal found 4/28

$897

Tue 5/65:40 pmLHR - STL

2 stops28h 07mLufthansa

Mon 5/199:40 amSTL - LHR

2 stops15h 15mLufthansa

Deal found 4/28

$971

Tue 5/611:30 amLHR - STL

2 stops16h 06mVirgin Atlantic

Tue 5/1310:45 amSTL - LHR

2 stops14h 00mVirgin Atlantic

Deal found 4/29

$1,033

Tue 5/611:45 amLHR - STL

2 stops17h 51mDelta

Tue 5/2711:32 amSTL - LHR

1 stop19h 38mDelta

Deal found 4/29

$1,108

Tue 5/66:00 amSTN - STL

3 stops19h 58mMultiple Airlines

Tue 5/132:30 pmSTL - STN

2 stops17h 50mMultiple Airlines

Deal found 4/29

$1,231

Thu 5/82:00 pmLGW - STL

1 stop16h 06mMultiple Airlines

Sat 5/245:35 pmSTL - LGW

1 stop34h 35mMultiple Airlines

Deal found 4/28

$718

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 30, 2025.

Tue 5/132:00 pmLGW - STL

1 stop16h 06mMultiple Airlines

Deal found 4/28

$345

Tue 5/137:05 pmLTN - STL

3 stops56h 00mMultiple Airlines

Deal found 4/28

$437

Tue 5/132:10 pmLHR - STL

3 stops39h 56mMultiple Airlines

Deal found 4/28

$502

Thu 5/296:50 amSTN - STL

3 stops32h 19mMultiple Airlines

Deal found 4/29

$537

Thu 5/298:45 amLCY - STL

3 stops30h 24mMultiple Airlines

Deal found 4/29

$651

Sat 7/58:50 amLHR - STL

2 stops29h 06mAer Lingus

Deal found 4/29

$898

Thu 5/292:10 pmLHR - STL

1 stop13h 42mFinnair

Deal found 4/29

$905

Mon 6/2312:30 pmLHR - STL

1 stop13h 49mBritish Airways

Deal found 4/29

$967

Fri 10/32:25 pmLHR - STL

1 stop11h 58mIberia

Deal found 4/28

$1,060

Sat 7/55:30 amLGW - STL

2 stops23h 15mTurkish Airlines

Deal found 4/29

$1,133

Thu 7/108:30 amLHR - STL

1 stop13h 17mLufthansa

Deal found 4/28

$1,172

Thu 10/211:20 amLHR - STL

2 stops32h 59mTurkish Airlines

Deal found 4/28

$1,232

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

Thu 6/12

2:00 pm-11:53 pm

1 stop15h 53m

Lambert-St Louis

Thu 6/19

5:47 pm-10:00 am

1 stop34h 13m

$793

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Thu 6/12

1:45 pm-5:04 pm

3 stops33h 19m

Lambert-St Louis

Thu 6/19

6:12 pm-6:35 am

3 stops30h 23m

$862

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Thu 6/12

6:40 am-9:34 pm

2 stops20h 54m

Lambert-St Louis

Thu 6/19

1:30 pm-6:30 pm

2 stops23h 00m

$900

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 9/3

6:30 am-8:21 pm

2 stops19h 51m

Lambert-St Louis

Wed 9/10

8:01 pm-12:15 pm

1 stop10h 14m

$904

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Thu 6/12

12:30 pm-8:19 pm

1 stop13h 49m

Lambert-St Louis

Thu 6/19

1:21 pm-7:20 am

1 stop11h 59m

$919

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Sat 10/4

8:30 am-10:34 am

2 stops32h 04m

Lambert-St Louis

Wed 10/22

12:28 pm-6:55 am

2 stops12h 27m

$920

LondonSt. Louis

STN - STL

STNSTL

London Stansted

Wed 9/3

8:30 am-7:33 pm

2 stops17h 03m

Lambert-St Louis

Wed 9/24

4:05 pm-8:00 pm

2 stops21h 55m

$945

LondonSt. Louis

LCY - STL

LCYSTL

London City

Tue 6/10

8:45 am-12:36 pm

2 stops33h 51m

Lambert-St Louis

Tue 6/17

7:30 am-6:45 pm

2 stops29h 15m

$975

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Fri 9/12

9:30 am-7:57 pm

1 stop16h 27m

Lambert-St Louis

Sat 9/20

1:30 pm-9:35 am

1 stop14h 05m

$1,000

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Fri 5/9

2:05 pm-7:58 pm

1 stop11h 53m

Lambert-St Louis

Tue 5/13

4:45 pm-12:20 pm

1 stop13h 35m

$1,007

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/28

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 Accuracy2 stars	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

7,936 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

7,936 reviews

Delta

8.0

Very good

7,936 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

1,333 reviews

Delta

8.0

Very good

7,936 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

1,273 reviews

Delta

8.0

Very good

7,936 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

780 reviews

Delta

8.0

Very good

7,936 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

7.4

Good

1,446 reviews

Delta

8.0

Very good

7,936 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 Scandinavian Airlines. Our recent data shows that you can find tickets from as low as $900 on this airline. Additional options worth looking into are British Airways and Iberia, starting at $904 and $919 round-trip. Scandinavian Airlines is currently priced 4% below the average price you’ll pay for this route.
What are the cheapest airlines to fly from London to St. Louis one-way?
$898 is the cheapest one-way deal found within the past few days, from Aer Lingus. You may also be able to find cheap deals on Finnair and British Airways, with prices starting from $905 and $967, 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$961	Average$1,151	FlexibilityNo cancel fee	On-time70%

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$345+ 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 5/13. 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

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

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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 30, 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 30, 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 25, 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 30, 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?

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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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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 30, 2025.