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St. Louis

$435+ 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 9/4. Fares are subject to change and may not be available on all flights or dates of travel.
LON — STL
Jul 19 — Jul 261
Sun 7/19
Sun 7/26
1 adult, Economy
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Cheapflights Tip: The best prices from London to Lambert-St Louis are usually found in February or March, booked 79 days in advance, depart on a Wednesday or Monday and return on a Thursday

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 June 19, 2026.

This Scandinavian Airlines deal was found by Cheapflights users on 6/17. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/97:05 am
LHR
-
STL
3 stops22h 34m
Scandinavian Airlines
Fri 11/134:40 pm
STL
-
LHR
2 stops19h 50m
Scandinavian Airlines
Deal found 6/17$992
This Kiwi.com deal was found by Cheapflights users on 6/17. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/12:00 pm
LGW
-
STL
1 stop16h 14m
Multiple Airlines
Sat 10/316:00 am
STL
-
LGW
2 stops23h 55m
Multiple Airlines
Deal found 6/17$995
This Kissandfly.com deal was found by Cheapflights users on 6/17. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/234:25 pm
LHR
-
STL
Nonstop9h 05m
British Airways
Sat 10/31:25 pm
STL
-
LHR
1 stop12h 25m
British Airways
Deal found 6/17$999
This ChecknFly deal was found by Cheapflights users on 6/17. 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 ChecknFly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/269:15 am
LHR
-
STL
1 stop14h 04m
Iberia
Sat 6/278:14 pm
STL
-
LHR
1 stop29h 51m
Iberia
Deal found 6/17$1,000
This TravelUp deal was found by Cheapflights users on 6/17. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/269:15 am
LHR
-
STL
2 stops15h 45m
Multiple Airlines
Sat 6/278:14 pm
STL
-
LHR
1 stop29h 51m
Multiple Airlines
Deal found 6/17$1,001
This Scandinavian Airlines deal was found by Cheapflights users on 6/16. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/77:30 pm
LHR
-
STL
2 stops31h 19m
Scandinavian Airlines
Tue 10/133:42 pm
STL
-
LHR
2 stops18h 18m
Scandinavian Airlines
Deal found 6/16$1,003
This Flysmarter deal was found by Cheapflights users on 6/18. 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 Flysmarter is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/39:15 am
LHR
-
STL
1 stop14h 06m
British Airways
Sun 7/199:40 pm
STL
-
LHR
Nonstop8h 00m
British Airways
Deal found 6/18$1,004
This ChecknFly deal was found by Cheapflights users on 6/17. 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 ChecknFly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/2511:30 am
LGW
-
STL
2 stops37h 57m
Iberia
Tue 9/81:25 pm
STL
-
LGW
2 stops24h 35m
Iberia
Deal found 6/17$1,007
This Mytrip deal was found by Cheapflights users on 6/18. 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.
Fri 8/286:20 am
LTN
-
STL
2 stops20h 02m
Multiple Airlines
Mon 9/712:10 pm
STL
-
LTN
2 stops21h 35m
Multiple Airlines
Deal found 6/18$1,009
This Travcart deal was found by Cheapflights users on 6/16. 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 Travcart is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/1412:15 pm
LHR
-
STL
1 stop18h 01m
Finnair
Tue 7/219:35 pm
STL
-
LHR
Nonstop8h 00m
Finnair
Deal found 6/16$1,014
This Kiwi.com deal was found by Cheapflights users on 6/19. 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.
Wed 6/242:00 pm
LGW
-
STL
1 stop15h 49m
Multiple Airlines
Sat 7/45:06 pm
STL
-
LGW
2 stops34h 54m
Multiple Airlines
Deal found 6/19$1,021
This Iberia deal was found by Cheapflights users on 6/16. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/74:25 pm
LHR
-
STL
Nonstop9h 05m
Iberia
Thu 10/1512:43 pm
STL
-
LHR
1 stop11h 37m
Iberia
Deal found 6/16$1,022

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 June 19, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$992
(Scandinavian Airlines)

One-way from

$426
(Kiwi.com)

Popular in

July

Cheapest in

February

Average price

$1,127

Good round-trip deal

$1,295 or less

Good one-way deal

$1,090 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. 14% potential increase in price ($168 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($23 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 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 June 19, 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

LGW - STL

LGWSTL

London Gatwick

Tue 8/25

11:30 am-7:27 pm

2 stops37h 57m

Lambert-St Louis

Tue 9/8

1:25 pm-8:00 pm

2 stops24h 35m

$1,007

LondonSt. Louis

LTN - STL

LTNSTL

London Luton

Fri 8/28

6:20 am-8:22 pm

2 stops20h 02m

Lambert-St Louis

Mon 9/7

12:10 pm-3:45 pm

2 stops21h 35m

$1,009

LondonSt. Louis

LCY - STL

LCYSTL

London City

Tue 9/1

9:20 am-8:42 pm

2 stops17h 22m

Lambert-St Louis

Sat 10/31

5:45 pm-1:15 pm

2 stops14h 30m

$1,036

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Sun 7/12

6:50 am-3:46 pm

2 stops14h 56m

Lambert-St Louis

Sun 7/26

1:13 pm-10:40 am

2 stops15h 27m

$1,049
Quickest round-trip

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 9/16

4:25 pm-7:30 pm

Nonstop9h 05m

Lambert-St Louis

Wed 9/23

9:35 pm-11:35 am

Nonstop8h 00m

$1,069

LondonSt. Louis

LGW - STL

LGWSTL

London Gatwick

Mon 11/9

7:40 pm-11:56 pm

2 stops34h 16m

Lambert-St Louis

Fri 11/13

1:20 pm-10:50 am

2 stops39h 30m

$1,073

LondonSt. Louis

LGW - STL

LGWSTL

London Gatwick

Fri 8/28

12:40 pm-8:22 pm

1 stop13h 42m

Lambert-St Louis

Mon 9/7

8:55 am-10:45 am

1 stop19h 50m

$1,114

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 7/6

3:00 pm-11:57 pm

1 stop14h 57m

Lambert-St Louis

Sun 7/12

9:40 pm-11:40 am

Nonstop8h 00m

$1,121

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 7/29

7:30 am-6:13 pm

2 stops16h 43m

Lambert-St Louis

Wed 8/5

1:13 pm-9:20 am

2 stops14h 07m

$1,126

LondonSt. Louis

LTN - STL

LTNSTL

London Luton

Tue 6/30

6:00 am-11:29 pm

3 stops23h 29m

Lambert-St Louis

Fri 7/17

8:55 am-10:40 pm

3 stops31h 45m

$1,131

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/14

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 June.
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

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 $91). Flying from London to St. Louis in June is currently the most expensive (average of $772). 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 June 19, 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?

How often are flights from London to St. Louis delayed?

About 0% of weekly flights between London and St. Louis have experienced delays in the past year, with the average delay time being 0 minutes.

What is the most punctual flight time for London to St. Louis flights?

Historically, flights departing in the early afternoon are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Tuesday tends to have the lowest number of delays on this route, whereas Sunday has historically faced a higher average of delays compared to other days of the week.

How far ahead should I book a flight from London to St. Louis?

Booking 83 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.

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 2 different airlines.

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

    A quick flight from London to St. Louis can take about 14h 56m. Iberia provides one of the quickest options available for as low as $1,049. 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 American Airlines. Our recent data shows that you can find tickets from as low as $692 on this airline. An additional option worth looking into is British Airways, starting at $791. American Airlines is currently priced 31% 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 cheapest flights from London to St. Louis?

    The cheapest flight price from London to St. Louis is $964. On average you can expect to pay $1,391. The most popular route, (London Heathrow - Lambert-St Louis), can usually be booked for $692.

  • 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 $91). Flying from London to St. Louis in June is currently the most expensive (average of $772). 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
Eureka
Maryland Heights
Collinsville
Wentzville
Glencoe
Chesterfield
Alton
Farmington

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 June 19, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$692Average$1,143FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$791Average$964FlexibilityNo cancel feeOn-time70%

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