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St. Louis

$369+ 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 5/28. Fares are subject to change and may not be available on all flights or dates of travel.
LON — STL
Jun 5 — Jun 121
Fri 6/5
Fri 6/12
1 adult, Economy
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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 May 6, 2026.

This TravelUp deal was found by Cheapflights users on 5/5. 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.
Wed 9/29:45 am
LHR
-
STL
1 stop12h 39m
British Airways
Wed 9/2311:18 am
STL
-
LHR
1 stop13h 32m
British Airways
Deal found 5/5$855
This American Airlines deal was found by Cheapflights users on 5/2. 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.
Wed 9/94:25 pm
LHR
-
STL
Nonstop9h 05m
American Airlines
Thu 9/176:20 am
STL
-
LHR
1 stop18h 30m
American Airlines
Deal found 5/2$859
This TravelUp deal was found by Cheapflights users on 5/4. 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.
Wed 9/211:15 am
LHR
-
STL
1 stop12h 47m
Virgin Atlantic
Wed 9/231:30 pm
STL
-
LHR
1 stop11h 45m
Virgin Atlantic
Deal found 5/4$863
This American Airlines deal was found by Cheapflights users on 5/2. 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.
Mon 9/72:45 pm
LHR
-
STL
1 stop15h 14m
American Airlines
Wed 9/162:45 pm
STL
-
LHR
1 stop10h 55m
American Airlines
Deal found 5/2$865
This TravelUp deal was found by Cheapflights users on 5/5. 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.
Mon 9/286:10 pm
LHR
-
STL
2 stops35h 10m
Finnair
Sun 10/44:29 pm
STL
-
LHR
1 stop33h 11m
Finnair
Deal found 5/5$867
This British Airways deal was found by Cheapflights users on 5/1. 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.
Tue 9/224:25 pm
LHR
-
STL
Nonstop9h 05m
British Airways
Tue 10/69:35 pm
STL
-
LHR
Nonstop8h 00m
British Airways
Deal found 5/1$870
This Orbitz deal was found by Cheapflights users on 5/4. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/86:30 am
LHR
-
STL
1 stop12h 55m
Multiple Airlines
Tue 9/229:35 pm
STL
-
LHR
Nonstop8h 00m
Multiple Airlines
Deal found 5/4$871
This Kiwi.com deal was found by Cheapflights users on 5/4. 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.
Thu 6/252:00 pm
LGW
-
STL
1 stop15h 49m
Multiple Airlines
Thu 7/94:09 pm
STL
-
LGW
1 stop35h 51m
Multiple Airlines
Deal found 5/4$872
This American Airlines deal was found by Cheapflights users on 5/4. 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 9/224:25 pm
LHR
-
STL
Nonstop9h 05m
American Airlines
Tue 10/69:35 pm
STL
-
LHR
Nonstop8h 00m
American Airlines
Deal found 5/4$873
This Kiwi.com deal was found by Cheapflights users on 5/2. 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.
Mon 6/12:00 pm
LGW
-
STL
1 stop15h 57m
Multiple Airlines
Mon 6/84:19 pm
STL
-
LGW
1 stop35h 41m
Multiple Airlines
Deal found 5/2$891
This Kiwi.com deal was found by Cheapflights users on 5/5. 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.
Tue 6/92:00 pm
LGW
-
STL
1 stop15h 49m
Multiple Airlines
Sun 6/214:17 pm
STL
-
LGW
1 stop35h 43m
Multiple Airlines
Deal found 5/5$907
This Expedia deal was found by Cheapflights users on 5/3. 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.
Sun 11/15:50 pm
LCY
-
STL
2 stops28h 08m
KLM
Wed 11/1111:51 am
STL
-
LCY
2 stops13h 24m
KLM
Deal found 5/3$926

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 May 6, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$855
(TravelUp)

One-way from

$369
(Norse)

Popular in

July

Cheapest in

January

Average price

$952

Good round-trip deal

$998 or less

Good one-way deal

$651 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. 10% potential increase in price ($119 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($17 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 2026
Search Deals
Price to beat on a round-trip flight from London (LON) to Lambert-St Louis.
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 May 6, 2026.
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

Cheapest round-trip

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Tue 9/22

9:55 am-8:31 pm

2 stops16h 36m

Lambert-St Louis

Tue 10/6

9:00 am-7:15 am

1 stop16h 15m

$884

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 9/2

6:30 am-4:45 pm

2 stops16h 15m

Lambert-St Louis

Wed 9/23

1:30 pm-10:20 am

2 stops14h 50m

$886

LondonSt. Louis

LGW - STL

LGWSTL

London Gatwick

Tue 6/9

2:00 pm-11:49 pm

1 stop15h 49m

Lambert-St Louis

Sun 6/21

4:17 pm-10:00 am

1 stop35h 43m

$926

LondonSt. Louis

LCY - STL

LCYSTL

London City

Sun 11/1

5:50 pm-3:58 pm

2 stops28h 08m

Lambert-St Louis

Wed 11/11

11:51 am-7:15 am

2 stops13h 24m

$926

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Sun 11/1

11:45 am-11:18 pm

2 stops17h 33m

Lambert-St Louis

Wed 11/11

11:51 am-6:55 am

2 stops13h 04m

$927

LondonSt. Louis

LTN - STL

LTNSTL

London Luton

Tue 6/9

7:55 pm-1:25 pm

2 stops23h 30m

Lambert-St Louis

Sun 6/21

2:15 pm-2:35 pm

3 stops18h 20m

$997

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Tue 6/16

6:30 am-5:23 pm

2 stops16h 53m

Lambert-St Louis

Tue 6/23

3:57 pm-12:15 pm

2 stops14h 18m

$1,045

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 6/17

8:40 am-8:39 pm

2 stops17h 59m

Lambert-St Louis

Tue 6/23

5:36 pm-1:05 pm

1 stop13h 29m

$1,045

LondonSt. Louis

LGW - STL

LGWSTL

London Gatwick

Mon 6/15

10:25 am-8:39 pm

2 stops16h 14m

Lambert-St Louis

Mon 6/22

11:18 am-9:40 am

2 stops16h 22m

$1,067

LondonSt. Louis

LGW - STL

LGWSTL

London Gatwick

Mon 6/15

2:00 pm-11:49 pm

1 stop15h 49m

Lambert-St Louis

Mon 6/22

7:03 pm-10:00 am

2 stops32h 57m

$1,070

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/5

Showing 1-10 of 60 resultsSorted by cheapest first
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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 May.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
ExpediaPrice Accuracy1 starTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy2 starsTrust Score*3 stars
Thrive TravelPrice Accuracy3 starsTrust Score*2 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on London-St. Louis flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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 46 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 $115). Flying from London to St. Louis in November is currently the most expensive (average of $656). 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 May 6, 2026.

When flying from London to St. Louis, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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

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 2 flights from London to Lambert-St Louis per day from 3 different airlines.

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

    A quick flight from London to St. Louis can take about 16h 36m. Delta provides one of the quickest options available for as low as $884. 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. Additional options worth looking into are United Airlines and American Airlines, starting at $654 and $692 round-trip. British Airways is currently priced 44% below the average price you’ll pay for this route.

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

    $438 is the cheapest one-way deal found within the past few days, from Finnair. You may also be able to find cheap deals on British Airways and American Airlines, with prices starting from $519 and $575, respectively.

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

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

  • What are the most reliable airlines from London to St. Louis?

    Consider American Airlines (100%), Aer Lingus (100%) or Finnair (100%) when booking your flight. These represent the most reliable airlines when flying 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 $649. On average you can expect to pay $962. The most popular route, (London Heathrow - Lambert-St Louis), can usually be booked for $852.

  • 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 $115). Flying from London to St. Louis in November is currently the most expensive (average of $656). 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
Fenton
Swansea
Fairview Heights
Maryland Heights
Collinsville
Eureka
Wentzville
Glencoe
Chesterfield
Alton
Farmington
Festus

Browse thousands of different options on Cheapflights for your next trip

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Top 3 airlines flying from London to St. Louis

Discover the top 3 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 May 6, 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$555Average$869FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$654Average$857FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$692Average$1,143FlexibilityNo cancel feeOn-time71%

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