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St. Louis

$358+ 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 1/24. Fares are subject to change and may not be available on all flights or dates of travel.
LON — STL
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
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 52 days in advance, depart on a Wednesday or Thursday and return on a Saturday

Cheap 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 December 18, 2025.

This British Airways deal was found by Cheapflights users on 12/17. 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.
Thu 12/2511:45 amLHR - STL
1 stop13h 45mBritish Airways
Sun 1/186:44 pmSTL - LHR
1 stop10h 51mBritish Airways
Deal found 12/17$778
This oojo deal was found by Cheapflights users on 12/17. 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.
Thu 12/2510:15 amLHR - STL
1 stop18h 41mMultiple Airlines
Sun 1/1811:05 amSTL - LHR
2 stops20h 20mMultiple Airlines
Deal found 12/17$1,294
This American Airlines deal was found by Cheapflights users on 12/16. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/2510:05 amLHR - STL
1 stop15h 17mAmerican Airlines
Sun 1/181:35 pmSTL - LHR
1 stop12h 40mAmerican Airlines
Deal found 12/16$1,299
This Delta deal was found by Cheapflights users on 12/16. 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.
Thu 12/256:30 amLHR - STL
2 stops15h 58mDelta
Sun 1/1812:00 pmSTL - LHR
2 stops12h 55mDelta
Deal found 12/16$1,389
This American Airlines deal was found by Cheapflights users on 12/16. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/167:25 pmLCY - STL
2 stops31h 13mMultiple Airlines
Sat 1/319:33 amSTL - LCY
2 stops25h 12mMultiple Airlines
Deal found 12/16$1,446
This Expedia deal was found by Cheapflights users on 12/16. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/161:00 pmLHR - STL
1 stop13h 47mVirgin Atlantic
Sat 1/315:04 pmSTL - LHR
2 stops45h 06mVirgin Atlantic
Deal found 12/16$1,490
This Expedia deal was found by Cheapflights users on 12/17. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/173:50 pmLHR - STL
1 stop30h 16mVirgin Atlantic
Sat 1/315:04 pmSTL - LHR
2 stops45h 06mVirgin Atlantic
Deal found 12/17$1,544
This Delta deal was found by Cheapflights users on 12/16. 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.
Tue 12/1611:30 amLHR - STL
2 stops16h 27mDelta
Sat 1/319:59 amSTL - LHR
2 stops17h 06mDelta
Deal found 12/16$1,568
This KLM deal was found by Cheapflights users on 12/17. 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.
Wed 12/173:50 pmLHR - STL
1 stop22h 34mKLM
Sat 1/3111:23 amSTL - LHR
1 stop13h 42mKLM
Deal found 12/17$1,584
This Expedia deal was found by Cheapflights users on 12/16. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/166:15 pmLCY - STL
1 stop25h 40mLufthansa
Sat 1/314:49 pmSTL - LCY
2 stops34h 26mLufthansa
Deal found 12/16$1,693
This Mytrip deal was found by Cheapflights users on 12/16. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/162:25 pmLGW - STL
2 stops29h 30mMultiple Airlines
Sat 1/314:05 pmSTL - LGW
2 stops17h 15mMultiple Airlines
Deal found 12/16$1,738
This Mytrip deal was found by Cheapflights users on 12/16. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/164:00 pmLTN - STL
2 stops27h 55mMultiple Airlines
Sat 1/314:05 pmSTL - LTN
2 stops18h 50mMultiple Airlines
Deal found 12/16$1,770

Find 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 December 18, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$509
(Kiwi.com)

One-way from

$358
(Trip.com)

Popular in

December

Cheapest in

March

Average price

$1,368

Good one-way deal

$639 or less
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 ($45 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($36 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a one-way flight from London (LON) to Lambert-St Louis.
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 December 18, 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

Thu 1/22

2:00 pm-11:33 pm

1 stop15h 33m

Lambert-St Louis

Mon 1/26

10:16 am-10:00 am

1 stop17h 44m

$470

LondonSt. Louis

LGW - STL

LGWSTL

London Gatwick

Fri 1/30

2:00 pm-11:33 pm

1 stop15h 33m

Lambert-St Louis

Fri 2/6

11:18 am-10:00 am

1 stop16h 42m

$509

LondonSt. Louis

LGW - STL

LGWSTL

London Gatwick

Mon 2/2

2:00 pm-11:33 pm

1 stop15h 33m

Lambert-St Louis

Fri 2/6

11:18 am-10:00 am

1 stop16h 42m

$567

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Thu 1/22

4:00 pm-11:59 pm

1 stop13h 59m

Lambert-St Louis

Mon 1/26

11:22 am-8:25 am

1 stop15h 03m

$608

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Sun 2/1

12:05 pm-7:27 pm

1 stop13h 22m

Lambert-St Louis

Sun 2/8

6:40 pm-11:15 am

1 stop10h 35m

$620

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Sun 2/1

11:10 am-10:58 pm

2 stops17h 48m

Lambert-St Louis

Sun 2/8

9:57 am-6:40 am

2 stops14h 43m

$620

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Thu 1/22

8:30 am-7:27 pm

2 stops16h 57m

Lambert-St Louis

Mon 1/26

1:15 pm-9:10 am

2 stops13h 55m

$622

LondonSt. Louis

LGW - STL

LGWSTL

London Gatwick

Tue 2/3

1:00 pm-6:51 am

2 stops23h 51m

Lambert-St Louis

Fri 2/6

11:18 am-10:00 am

1 stop16h 42m

$633

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Tue 1/13

8:20 am-4:14 pm

1 stop13h 54m

Lambert-St Louis

Fri 1/23

3:37 pm-10:00 am

1 stop12h 23m

$646

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Tue 1/13

3:35 pm-9:24 am

2 stops23h 49m

Lambert-St Louis

Fri 1/23

9:33 am-7:50 am

1 stop16h 17m

$658

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/17

Showing 1-10 of 59 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 December.
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 December 12, 2025.

Booking 52 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 $540). Flying from London to St. Louis in July is currently the most expensive (average of $814). 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 December 18, 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 December 18, 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
7,585 reviews

Crew

7.6

Food

6.4

Overall

6.7

Comfort

6.7

Boarding

6.9

Entertainment

6.4

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
7,585 reviews
British Airways
6.7
Okay
7,585 reviews

Crew

7.6

Food

6.4

Overall

6.7

Comfort

6.7

Boarding

6.9

Entertainment

6.4

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 1 airline.

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

    A quick flight from London to St. Louis can take about 13h 22m. Austrian Airlines provides one of the quickest options available for as low as $620. There are 4186 mi between London and St. Louis. This flight may include one or multiple stops.

  • What is the cheapest airline to fly 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. British Airways is currently priced 43% 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.

  • What are the cheapest flights from London to St. Louis?

    The cheapest flight price from London to St. Louis is $480. On average you can expect to pay $644. The most popular route, (London Heathrow - Lambert-St Louis), can usually be booked for $644.

  • 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 $540). Flying from London to St. Louis in July is currently the most expensive (average of $814). 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
Swansea
Eureka
Glencoe
St. Peters
Chesterfield
Alton
Farmington
Festus

Browse thousands of different options on Cheapflights for your next trip

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Top airline flying from London to St. Louis

Discover the top airline 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 December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$555Average$998FlexibilityNo cancel feeOn-time70%

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