Cheap flights from St. Louis to London from £199
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 27/7. Fares are subject to change and may not be available on all flights or dates of travel.
Cheapflights Tip: The best prices from Lambert-St Louis to London are usually found in April or October, booked 51 days in advance, depart on a Wednesday or Saturday and return on a Wednesday
Cheap flight deals from St. Louis to London
Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to London (LON). 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 4 July 2025.
Round-trip from | £531 |
---|---|
One-way from | £199 |
Popular in | June |
Cheapest in | April |
Average price | £864 |
Find flight deals from St. Louis to London
Cheapest flights from St. Louis to LondonExplore the most affordable flight options available from St. Louis to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 4 July 2025.
Explore the most affordable flight options available from St. Louis to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 4 July 2025.
Cheapflights Fare Finder
Customise your flight search to find flights from St. Louis to London 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 4 July 2025.
Use the filters below to find and compare flights from St. Louis to London that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
St. LouisLondon
STL - LHR
STLLHR
Lambert-St Louis
Tue 16/9
08:10-09:35
2 stops19h 25m
London Heathrow
Sat 27/9
09:30-19:57
1 stop16h 27m
St. LouisLondon
STL - LHR
STLLHR
Lambert-St Louis
Wed 17/9
13:30-08:35
2 stops13h 05m
London Heathrow
Sat 27/9
09:30-19:38
2 stops16h 08m
St. LouisLondon
STL - LHR
STLLHR
Lambert-St Louis
Tue 16/9
11:04-08:50
2 stops15h 46m
London Heathrow
Wed 14/1
11:30-23:40
2 stops18h 10m
St. LouisLondon
STL - LHR
STLLHR
Lambert-St Louis
Fri 1/8
19:38-14:25
1 stop12h 47m
London Heathrow
Fri 8/8
15:10-23:14
1 stop14h 04m
St. LouisLondon
STL - LHR
STLLHR
Lambert-St Louis
Thu 31/7
15:41-11:25
2 stops13h 44m
London Heathrow
Thu 7/8
09:40-21:34
2 stops17h 54m
St. LouisLondon
STL - LGW
STLLGW
Lambert-St Louis
Thu 2/10
09:15-20:40
3 stops29h 25m
London Gatwick
Mon 6/10
21:20-15:18
3 stops23h 58m
St. LouisLondon
STL - LHR
STLLHR
Lambert-St Louis
Sun 9/11
18:43-15:50
2 stops15h 07m
London Heathrow
Sat 15/11
08:45-13:55
2 stops35h 10m
St. LouisLondon
STL - STN
STLSTN
Lambert-St Louis
Sun 10/8
09:15-19:55
3 stops28h 40m
London Stansted
Tue 26/8
07:05-20:00
2 stops18h 55m
St. LouisLondon
STL - LHR
STLLHR
Lambert-St Louis
Thu 4/9
13:21-21:40
2 stops26h 19m
London Heathrow
Tue 16/9
07:05-22:00
3 stops20h 55m
St. LouisLondon
STL - LCY
STLLCY
Lambert-St Louis
Wed 27/8
11:29-08:10
2 stops14h 41m
London City
Mon 8/9
07:45-19:01
2 stops17h 16m
Best time to book a flight from St. Louis to London
Have a flexible travel schedule? Discover the best time to fly to London from St. Louis with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight from St. Louis to London
How far ahead should I book a flight from St. Louis to London?
Use this chart to determine the optimal time to book a return flight from St. Louis to London. Price data was last updated on 27 June 2025.
Booking 51 days in advance of your planned departure date is, on average, the best time to get cheap flights from St. Louis to London. 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 St. Louis to London?
Currently, January is the cheapest month in which you can book a flight from St. Louis to London (average of £112). Flying from St. Louis to London in August is currently the most expensive (average of £164). 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 STL to LON?
Find hourly flight availability from St. Louis to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 4 July 2025.
It’s optimal to fly from St. Louis to London in the morning. By choosing this option you can save up to 45% on the cost of your flight, compared to a flight in the evening.
Reviews of airlines servicing London
Get insights into the airlines that provide service to London. 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 London. Reviews last updated 4 July 2025.
Read through reviews of airlines operating flights from St. Louis to London, such as Delta, KLM, andMalaysia Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
Overall
Comfort
Crew
Boarding
Food
Reviews
Kim,May 2025
PIH - SLC
Entertainment
Overall
Comfort
Crew
Boarding
Food
Reviews
Kim,May 2025
PIH - SLC
Entertainment
Overall
Comfort
Crew
Boarding
Food
Reviews
Kim,May 2025
PIH - SLC
Entertainment
Overall
Comfort
Crew
Boarding
Food
Reviews
Kim,May 2025
PIH - SLC
Entertainment
Overall
Comfort
Crew
Boarding
Food
Reviews
Kim,May 2025
PIH - SLC
Entertainment
Overall
Comfort
Crew
Boarding
Food
Reviews
Kim,May 2025
PIH - SLC
Related info for your journey
Find useful and relevant information for your journey from St. Louis to London. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Travelling to a place near St. Louis?
Book flights to St. Louis if you plan to visit one of these locationsBrowse 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.
Alternative routes for St. Louis to London
See prices for flight routes from nearby airports that may be better suited for you.
Top 5 airlines flying from St. Louis to London
Discover the top 5 airlines that operate flights from St. Louis to London. 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 4 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 St. Louis to London?
Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from St. Louis to London. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.
Why should you use Cheapflights to find cheap flight tickets from St. Louis to London?
Millions of users choose and trust Cheapflights to book the best flight deals from St. Louis to London 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 St. Louis to London with no change fees?
Yes! Cheapflights helps users easily find flights from St. Louis to London with no change fees.
Can Cheapflights notify me if prices for flights from St. Louis to London become cheaper?
Yes! Start tracking prices for St. Louis to London flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.