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St. Louis

$250+ 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 1/15. Fares are subject to change and may not be available on all flights or dates of travel.
LON — STL
nov. 29 — dic. 61
sáb. 11/29
sáb. 12/6
1 adult, Economy
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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 Friday

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 octubre 30, 2025.

This British Airways deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 11/2611:55 amLHR - STL
1 stop13h 35mBritish Airways
mié. 12/33:59 pmSTL - LHR
1 stop12h 01mBritish Airways
Deal found 10/29$722
This lastminute.com deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/85:35 pmLHR - STL
2 stops34h 22mVirgin Atlantic
mar. 12/237:02 pmSTL - LHR
1 stop30h 48mVirgin Atlantic
Deal found 10/28$723
This Finnair deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/811:45 amLHR - STL
1 stop12h 58mMultiple Airlines
mar. 12/2311:41 amSTL - LHR
1 stop16h 19mMultiple Airlines
Deal found 10/28$724
This Delta deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 11/2611:45 amLHR - STL
2 stops15h 01mDelta
mié. 12/311:40 amSTL - LHR
1 stop12h 45mDelta
Deal found 10/29$727
This KLM deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/311:45 amLHR - STL
2 stops15h 02mKLM
mié. 12/102:02 pmSTL - LHR
1 stop11h 48mKLM
Deal found 10/28$728
This Kiwi.com deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 11/272:00 pmLGW - STL
1 stop15h 57mMultiple Airlines
jue. 12/43:30 pmSTL - LGW
1 stop12h 30mMultiple Airlines
Deal found 10/28$742
This The Travel House deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure The Travel House is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 11/275:05 pmLHR - STL
1 stop22h 18mFinnair
jue. 12/42:54 pmSTL - LHR
1 stop10h 06mFinnair
Deal found 10/28$749
This oojo deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/37:50 amLCY - STL
2 stops21h 16mBritish Airways
mié. 12/1010:13 amSTL - LCY
2 stops16h 37mBritish Airways
Deal found 10/28$750
This Netflights deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Netflights is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 11/243:00 pmLHR - STL
1 stop13h 59mBritish Airways
lun. 12/13:43 pmSTL - LHR
1 stop10h 32mBritish Airways
Deal found 10/30$753
This ChecknFly deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure ChecknFly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 11/241:30 pmLHR - STL
2 stops16h 26mFinnair
dom. 11/307:58 pmSTL - LHR
1 stop32h 27mFinnair
Deal found 10/30$754
This TravelUp deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 11/2710:45 amLHR - STL
1 stop13h 50mVirgin Atlantic
jue. 12/45:12 pmSTL - LHR
1 stop12h 28mVirgin Atlantic
Deal found 10/28$755
This KLM deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 11/276:30 amLHR - STL
2 stops16h 19mKLM
jue. 12/412:49 pmSTL - LHR
1 stop12h 16mKLM
Deal found 10/28$768

Cheap flight deals from London to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from London (LON) to St. Louis (STL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated octubre 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$721
(American Airlines)

One-way from

$250
(Kiwi.com)

Popular in

December

Cheapest in

March

Average price

$1,005
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 ($52 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($40 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from London to St. Louis that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated octubre 30, 2025.
Use the filters below to find and compare flights from London to St. Louis that are best for you.

Fly from

London

Fly to

St. Louis

Route

Depart

Return

Price

LondonSt. Louis

LGW - STL

LGWSTL

London Gatwick

jue. 3/5

11:20 am-6:08 pm

2 stops36h 48m

Lambert-St Louis

lun. 3/9

9:39 am-9:00 am

2 stops18h 21m

$723

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

lun. 12/8

11:45 am-6:43 pm

1 stop12h 58m

Lambert-St Louis

mar. 12/23

11:41 am-10:00 am

1 stop16h 19m

$724

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

mié. 12/3

8:40 am-8:47 pm

2 stops18h 07m

Lambert-St Louis

mié. 12/10

9:30 am-8:45 am

2 stops17h 15m

$728

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

mié. 12/3

11:45 am-8:47 pm

2 stops15h 02m

Lambert-St Louis

mié. 12/10

2:02 pm-7:50 am

1 stop11h 48m

$728

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

mar. 1/13

12:35 pm-9:15 pm

1 stop14h 40m

Lambert-St Louis

vie. 1/23

12:01 pm-7:00 am

1 stop12h 59m

$738

LondonSt. Louis

LGW - STL

LGWSTL

London Gatwick

jue. 11/27

2:00 pm-11:57 pm

1 stop15h 57m

Lambert-St Louis

jue. 12/4

3:30 pm-10:00 am

1 stop12h 30m

$742

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

lun. 11/24

1:30 pm-11:56 pm

2 stops16h 26m

Lambert-St Louis

lun. 12/1

3:43 pm-10:25 am

1 stop12h 42m

$754

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

lun. 11/24

12:35 pm-8:09 am

1 stop25h 34m

Lambert-St Louis

dom. 11/30

7:58 pm-10:25 am

1 stop32h 27m

$754

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

lun. 11/24

2:45 pm-11:07 pm

1 stop14h 22m

Lambert-St Louis

lun. 12/1

3:43 pm-8:15 am

1 stop10h 32m

$759

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

jue. 11/27

6:30 am-4:49 pm

2 stops16h 19m

Lambert-St Louis

jue. 12/4

7:02 pm-11:40 am

1 stop10h 38m

$768

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

Showing 1-10 of 60 results
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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 October.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
ExpediaPrice Accuracy2 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars
Thrive TravelPrice Accuracy3 starsTrust Score*1 star

*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?

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 October 24, 2025.

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, September is the cheapest month in which you can book a flight from London to St. Louis (average of $545). Flying from London to St. Louis in July is currently the most expensive (average of $828). 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?

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 octubre 30, 2025.

A simple way to save on the total cost of your ticket is to fly from London to St. Louis in the evening. If you’re flexible enough to do this you can expect to save up to 12% on your trip compared to booking a flight in the afternoon.

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

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to St. Louis. Reviews last updated octubre 30, 2025.
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
7,487 reviews

Overall

6.7

Boarding

6.9

Entertainment

6.4

Crew

7.6

Comfort

6.7

Food

6.3

Reviews

1 / 20
6.0
Good

Roxanne,Sep 2025

LHR - IAD

Food was mediocre. Couldn't use headphones because no information on how to use. Staff paid so much attention on a family with a baby . They got VIP treatment.
British Airways
6.7
Okay
7,487 reviews
British Airways
6.7
Okay
7,487 reviews

Overall

6.7

Boarding

6.9

Entertainment

6.4

Crew

7.6

Comfort

6.7

Food

6.3

Reviews

1 / 20
6.0
Good

Roxanne,Sep 2025

LHR - IAD

Food was mediocre. Couldn't use headphones because no information on how to use. Staff paid so much attention on a family with a baby . They got VIP treatment.

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?

    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 2 different airlines.

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

    A quick flight from London to St. Louis can take about 15h 02m. American Airlines provides one of the quickest options available for as low as $728. There are 4186 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. An additional option worth looking into is Lufthansa, starting at $925. British Airways is currently priced 43% below the average price you’ll pay for this route.

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

    $511 is the cheapest one-way deal found within the past few days, from British Airways. You may also be able to find cheap deals on Lufthansa and United Airlines, with prices starting from $517 and $523, 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, September is the cheapest month in which you can book a flight from London to St. Louis (average of $545). Flying from London to St. Louis in July is currently the most expensive (average of $828). 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

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Edwardsville
O'Fallon
Fairview Heights
Maryland Heights
Collinsville
Eureka
Glencoe
St. Peters
Chesterfield
Alton
Farmington
Festus

Browse thousands of different options on Cheapflights for your next trip

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Top 2 airlines flying from London to St. Louis

Discover the top 2 airlines that operate flights from London to St. Louis. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated octubre 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$555Average$1,063FlexibilityNo cancel feeOn-time70%
LufthansaCheapest$925Average$925FlexibilityNo cancel feeOn-time76%

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