Cheap flights from London to St. Louis from £289
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 21/8. Fares are subject to change and may not be available on all flights or dates of travel.
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 Monday and return on a Wednesday
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 11 July 2025.
Round-trip from | £630 |
---|---|
One-way from | £289 |
Popular in | December |
Cheapest in | March |
Average price | £861 |
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 11 July 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 11 July 2025.
Cheapflights Fare Finder
Customise 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 858,174 searches. Data last updated 11 July 2025.
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
LHR - STL
LHRSTL
London Heathrow
Sun 14/9
07:45-23:44
2 stops21h 59m
Lambert-St Louis
Wed 17/9
06:00-21:00
2 stops33h 00m
LondonSt. Louis
LGW - STL
LGWSTL
London Gatwick
Mon 11/8
14:00-23:47
1 stop15h 47m
Lambert-St Louis
Tue 19/8
08:00-10:00
1 stop20h 00m
LondonSt. Louis
LHR - STL
LHRSTL
London Heathrow
Sat 6/12
17:00-23:39
2 stops36h 39m
Lambert-St Louis
Thu 15/1
11:51-21:40
2 stops27h 49m
LondonSt. Louis
LHR - STL
LHRSTL
London Heathrow
Wed 3/12
12:15-23:45
2 stops17h 30m
Lambert-St Louis
Thu 15/1
12:24-10:50
2 stops16h 26m
LondonSt. Louis
LHR - STL
LHRSTL
London Heathrow
Tue 9/9
06:50-15:18
2 stops14h 28m
Lambert-St Louis
Wed 8/10
13:30-06:30
1 stop11h 00m
LondonSt. Louis
LHR - STL
LHRSTL
London Heathrow
Tue 25/11
06:00-23:44
2 stops23h 44m
Lambert-St Louis
Mon 1/12
12:31-10:50
2 stops40h 19m
LondonSt. Louis
LHR - STL
LHRSTL
London Heathrow
Sat 6/12
13:30-13:55
1 stop30h 25m
Lambert-St Louis
Thu 15/1
12:24-10:25
1 stop16h 01m
LondonSt. Louis
LHR - STL
LHRSTL
London Heathrow
Tue 25/11
12:35-20:00
1 stop13h 25m
Lambert-St Louis
Mon 1/12
17:57-11:40
1 stop11h 43m
LondonSt. Louis
LGW - STL
LGWSTL
London Gatwick
Mon 1/9
12:20-23:47
2 stops17h 27m
Lambert-St Louis
Mon 15/9
08:23-08:10
2 stops17h 47m
LondonSt. Louis
LCY - STL
LCYSTL
London City
Thu 4/12
09:40-23:45
2 stops20h 05m
Lambert-St Louis
Mon 8/12
18:45-17:40
2 stops16h 55m
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 return flight from London to St. Louis. Price data was last updated on 27 June 2025.
To ensure you get the cheapest price possible for a flight from London to St. Louis, you should look to book at least 13 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
What is the cheapest month to book a flight from London to St. Louis?
Currently, February is the cheapest month in which you can book a flight from London to St. Louis (average of £722). Flying from London to St. Louis in December is currently the most expensive (average of £1,033). 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 11 July 2025.
It’s typically best to fly out from London to St. Louis in the evening. Doing so could potentially save you 16% on the flight price compared to flying in the morning, which is usually more expensive.
What is the cheapest day to fly from London to St. Louis?
Use this chart to determine the cheapest time to fly return from London to St. Louis. Price data was last updated on 30 June 2024.
Travellers seeking maximum savings on their London to St. Louis flight should consider departing on Tuesday evenings when fares are most often at their lowest. Sunday at midday flights should be avoided if possible as fares are typically the most expensive at this time.
How much does it cost for a return flight 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 11 July 2025.
See what other customers who have flown with Delta, KLM, andAustrian Airlines from London to St. Louis have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Boarding
Food
Comfort
Crew
Overall
Entertainment
Reviews
Michael,Jul 2025
AMS - ATL
Boarding
Food
Comfort
Crew
Overall
Entertainment
Reviews
Michael,Jul 2025
AMS - ATL
Boarding
Food
Comfort
Crew
Overall
Entertainment
Reviews
Michael,Jul 2025
AMS - ATL
Boarding
Food
Comfort
Crew
Overall
Entertainment
Reviews
Michael,Jul 2025
AMS - ATL
Boarding
Food
Comfort
Crew
Overall
Entertainment
Reviews
Michael,Jul 2025
AMS - ATL
Boarding
Food
Comfort
Crew
Overall
Entertainment
Reviews
Michael,Jul 2025
AMS - ATL
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.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Fly from London to St. Louis on these airlines
Choose from the following airlines for your flight from London to St. Louis. Flights are based on user searches made on Cheapflights and were last updated on 11 July 2025.
Top 10 airlines flying from London to St. Louis
Discover the top 10 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 858,174 searches. Data last updated 11 July 2025.
Fly with Cheapflights
Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.
How does Cheapflights help users find flights from London to St. Louis?
Cheapflights helps you search for flights from London to St. Louis via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.
Why should you use Cheapflights to find cheap flight tickets from London to St. Louis?
Millions of users choose and trust Cheapflights to book the best flight deals from London to St. Louis for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.
Can Cheapflights find flights from London to St. Louis with no change fees?
Users can book flights with no change fees policies with our dedicated filters. Book flights from London to St. Louis flexibly with Cheapflights today.
Can Cheapflights notify me if prices for flights from London to St. Louis become cheaper?
Not ready to book yet? You can track prices for flights from London to St. Louis on Cheapflights with our Price Alert feature and get notified when better prices are available.