This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/12. Fares are subject to change and may not be available on all flights or dates of travel.
LON — STL
17 Nov — 24 Nov1
Return
1 adult
Economy
Return
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from London to Lambert-St Louis are usually found in February or January, booked 21 days in advance, depart on a Friday or Wednesday and return on a Tuesday
Cheap flight deals from London to St. Louis
Enter your travel dates to find the best prices.
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Best
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One-way
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 18 October 2026.
Mon 16/1106:40 -
2 stops23h 16m
Wed 2/1214:33 -
2 stops21h 57m
Deal found 17/10£621
Mon 16/1110:50 -
1 stop12h 52m
Mon 30/1118:05 -
2 stops30h 20m
Deal found 14/10£625
Tue 17/1118:40 -
2 stops35h 16m
Wed 2/1214:33 -
2 stops21h 57m
Deal found 17/10£628
Thu 12/1117:00 -
2 stops36h 56m
Mon 16/1114:31 -
2 stops21h 09m
Deal found 17/10£628
Sat 28/1108:50 -
2 stops17h 12m
Sat 5/1211:25 -
2 stops20h 00m
Deal found 14/10£629
Wed 2/1206:30 -
1 stop13h 15m
Mon 7/1213:17 -
1 stop15h 33m
Deal found 14/10£630
Fri 30/1006:40 -
2 stops22h 14m
Wed 4/1112:00 -
2 stops22h 00m
Deal found 15/10£631
Wed 2/1220:35 -
2 stops33h 37m
Wed 9/1219:54 -
3 stops32h 56m
Deal found 18/10£634
Wed 28/1006:40 -
2 stops22h 14m
Wed 4/1112:00 -
2 stops22h 00m
Deal found 15/10£635
Sun 29/1118:45 -
2 stops30h 42m
Sun 6/1206:02 -
2 stops20h 03m
Deal found 15/10£636
Mon 23/1119:40 -
2 stops29h 47m
Mon 30/1113:14 -
2 stops23h 46m
Deal found 16/10£708
Mon 16/1111:45 -
2 stops37h 37m
Mon 30/1113:14 -
2 stops23h 46m
Deal found 16/10£709
Best flights from London to St. Louis
Discover carefully curated flight deals from London to St. Louis that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 18 October 2026.
Thu 12/1117:00 -
2 stops36h 56m
Mon 16/1114:31 -
2 stops21h 09m
Deal found 17/10£628
Mon 23/1109:00 -
2 stops16h 23m
Thu 3/1209:40 -
2 stops15h 00m
Deal found 13/10£645
Mon 16/1106:30 -
2 stops21h 10m
Mon 30/1113:08 -
1 stop10h 47m
Deal found 13/10£651
Thu 5/1111:45 -
2 stops36h 32m
Mon 9/1111:35 -
2 stops25h 25m
Deal found 17/10£809
Thu 12/1111:00 -
1 stop18h 16m
Sun 15/1116:05 -
2 stops14h 05m
Deal found 16/10£850
Tue 1/1217:25 -
2 stops34h 32m
Tue 8/1206:30 -
2 stops34h 05m
Deal found 14/10£967
Wed 28/1007:05 -
3 stops21h 49m
Wed 4/1112:00 -
2 stops27h 40m
Deal found 15/10£649
Tue 17/1106:35 -
2 stops20h 24m
Wed 2/1213:18 -
1 stop10h 37m
Deal found 17/10£655
Mon 16/1107:30 -
2 stops17h 53m
Wed 2/1213:18 -
1 stop10h 37m
Deal found 17/10£655
Tue 1/1217:30 -
1 stop26h 15m
Tue 8/1213:18 -
1 stop10h 37m
Deal found 13/10£665
Wed 2/1216:35 -
2 stops37h 37m
Wed 9/1218:13 -
1 stop30h 37m
Deal found 18/10£880
Tue 1/1210:25 -
1 stop12h 40m
Thu 10/1213:18 -
1 stop10h 37m
Deal found 14/10£676
Tue 3/1106:30 -
2 stops45h 10m
Tue 10/1107:30 -
2 stops27h 00m
Deal found 17/10£970
Mon 2/1106:25 -
3 stops22h 51m
Mon 16/1113:28 -
3 stops21h 52m
Deal found 15/10£884
Wed 18/1111:10 -
2 stops16h 30m
Sun 22/1110:53 -
2 stops13h 47m
Deal found 13/10£680
Thu 3/1210:25 -
1 stop12h 40m
Thu 10/1213:18 -
1 stop10h 37m
Deal found 14/10£706
Wed 28/1011:55 -
2 stops15h 35m
Tue 3/1111:20 -
2 stops17h 35m
Deal found 13/10£940
Fri 4/1210:25 -
1 stop12h 40m
Wed 9/1215:25 -
1 stop10h 30m
Deal found 14/10£706
Mon 23/1106:30 -
2 stops20h 30m
Thu 3/1206:30 -
2 stops28h 00m
Deal found 13/10£947
Thu 12/1106:35 -
2 stops17h 34m
Thu 19/1106:00 -
1 stop18h 20m
Deal found 15/10£714
Sun 25/1012:35 -
1 stop15h 38m
Wed 25/1118:05 -
1 stop30h 45m
Deal found 17/10£967
Wed 18/1111:55 -
2 stops16h 20m
Sun 22/1111:40 -
2 stops17h 15m
Deal found 13/10£967
Direct flights from London to St. Louis
Explore direct flight options from London to St. Louis based on user searches, and compare prices and availability for your desired travel dates. Data last updated 18 October 2026.
Wed 21/1016:25 -
Nonstop9h 05m
Wed 21/1021:35 -
Nonstop8h 00m
Deal found 16/10£3,854
Last-minute flights from London to St. Louis
Discover last-minute flight deals from London to St. Louis. Data last updated 18 October 2026 and is based on user searches.
Wed 28/1006:40 -
2 stops22h 14m
Wed 4/1112:00 -
2 stops22h 00m
Deal found 15/10£635
Fri 30/1006:40 -
2 stops22h 14m
Wed 4/1112:00 -
2 stops22h 00m
Deal found 15/10£631
Tue 10/1109:00 -
2 stops16h 23m
Tue 17/1114:55 -
1 stop13h 20m
Deal found 13/10£645
Thu 12/1117:00 -
2 stops36h 56m
Mon 16/1114:31 -
2 stops21h 09m
Deal found 17/10£628
Mon 16/1106:40 -
2 stops23h 16m
Wed 2/1214:33 -
2 stops21h 57m
Deal found 17/10£621
Mon 16/1110:50 -
1 stop12h 52m
Mon 30/1118:05 -
2 stops30h 20m
Deal found 14/10£625
Mon 16/1111:45 -
2 stops37h 37m
Mon 30/1113:14 -
2 stops23h 46m
Deal found 16/10£709
Tue 17/1118:40 -
2 stops35h 16m
Wed 2/1214:33 -
2 stops21h 57m
Deal found 17/10£628
Mon 23/1119:40 -
2 stops29h 47m
Mon 30/1113:14 -
2 stops23h 46m
Deal found 16/10£708
Sat 28/1108:50 -
2 stops17h 12m
Sat 5/1211:25 -
2 stops20h 00m
Deal found 14/10£629
Sat 28/1107:50 -
2 stops20h 05m
Fri 4/1207:27 -
2 stops19h 38m
Deal found 14/10£640
Sun 29/1118:45 -
2 stops30h 42m
Sun 6/1206:02 -
2 stops20h 03m
Deal found 15/10£636
One-way flights from London to St. Louis
Search for one-way flight options from London to St. Louis. Find affordable one-way fares based on user searches. Data last updated 18 October 2026.
Wed 9/1215:15 -
3 stops50h 02m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 14/10£340
Thu 12/1111:00 -
2 stops36h 42m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 16/10£358
Fri 8/112:35 -
1 stop37h 15m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 17/10£386
Wed 4/1116:45 -
3 stops54h 57m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 14/10£387
Mon 16/1113:40 -
3 stops58h 02m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 15/10£388
Thu 3/1211:00 -
1 stop19h 12m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 15/10£391
Mon 23/1113:40 -
3 stops58h 00m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 16/10£397
Tue 15/1212:15 -
3 stops29h 02m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 14/10£400
Thu 3/1206:00 -
3 stops35h 17m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 15/10£404
Mon 9/1113:40 -
3 stops58h 02m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 16/10£408
Wed 9/1206:30 -
1 stop13h 15m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 14/10£409
Thu 19/1111:00 -
2 stops36h 40m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 16/10£411
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 18 October 2026.
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 7,457,451 searches. Data last updated 18 October 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 return flight
LondonSt. Louis
LGW London Gatwick - STL Lambert-St Louis
LGWSTL
London Gatwick
Thu 12/11
11:00-23:16
1 stop18h 16m
Lambert-St Louis
Wed 31/12
00:00-07:00
Nonstop0h 00m
£384
LondonSt. Louis
LGW London Gatwick - STL Lambert-St Louis
LGWSTL
London Gatwick
Wed 4/11
16:45-17:42
3 stops54h 57m
Lambert-St Louis
Wed 31/12
00:00-07:00
Nonstop0h 00m
£387
LondonSt. Louis
LHR London Heathrow - STL Lambert-St Louis
LHRSTL
London Heathrow
Thu 3/12
06:00-11:17
3 stops35h 17m
Lambert-St Louis
Wed 31/12
00:00-07:00
Nonstop0h 00m
£404
LondonSt. Louis
LHR London Heathrow - STL Lambert-St Louis
LHRSTL
London Heathrow
Mon 23/11
18:30-17:40
3 stops53h 10m
Lambert-St Louis
Wed 31/12
00:00-07:00
Nonstop0h 00m
£421
LondonSt. Louis
LHR London Heathrow - STL Lambert-St Louis
LHRSTL
London Heathrow
Wed 18/11
06:00-18:39
3 stops42h 39m
Lambert-St Louis
Wed 31/12
00:00-07:00
Nonstop0h 00m
£425
LondonSt. Louis
LHR London Heathrow - STL Lambert-St Louis
LHRSTL
London Heathrow
Mon 11/1
06:50-23:20
2 stops22h 30m
Lambert-St Louis
Wed 31/12
00:00-07:00
Nonstop0h 00m
£430
LondonSt. Louis
LHR London Heathrow - STL Lambert-St Louis
LHRSTL
London Heathrow
Thu 19/11
06:00-17:40
3 stops41h 40m
Lambert-St Louis
Wed 31/12
00:00-07:00
Nonstop0h 00m
£435
LondonSt. Louis
LGW London Gatwick - STL Lambert-St Louis
LGWSTL
London Gatwick
Thu 3/12
11:00-10:57
2 stops29h 57m
Lambert-St Louis
Wed 31/12
00:00-07:00
Nonstop0h 00m
£437
LondonSt. Louis
LHR London Heathrow - STL Lambert-St Louis
LHRSTL
London Heathrow
Tue 12/1
13:30-13:45
1 stop30h 15m
Lambert-St Louis
Wed 31/12
00:00-07:00
Nonstop0h 00m
£440
LondonSt. Louis
LGW London Gatwick - STL Lambert-St Louis
LGWSTL
London Gatwick
Thu 5/11
11:00-23:16
1 stop18h 16m
Lambert-St Louis
Wed 31/12
00:00-07:00
Nonstop0h 00m
£443
Flights are sorted by cheapest return flights first.
Deals found on 16/10
Showing 1-10 of 43 resultsSorted by cheapest first
1
2
3
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5
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.
LON-STL
LHR-STL
LGW-STL
Estimated return 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
LON-STL
LHR-STL
LGW-STL
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 £531). Flying from London to St. Louis in August is currently the most expensive (average of £1,006). 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 18 October 2026.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London to St. Louis as you normally would.
How much does it cost for a return flight from London to St. Louis?
Airfare is below average for this route at the moment.
London to St. Louis flights typically cost between £658 and £812 in November.The cheapest return price found within the last 5 days was £621 on Scandinavian Airlines (16 Nov–2 Dec).
What’s the top stopover airport for flights from London to St. Louis?
Share of one-stop return flights from London to St. Louis chosen by Cheapflights users in the past 12 months, using the same stopover each way.
Atlanta (ATL) – chosen by Cheapflights users on 49% of one-stop itineraries from London to St. Louis on Cheapflights.
What’s the cheapest stopover airport for flights from London to St. Louis?
Average return fare for one-stop flights from London to St. Louis, chosen by Cheapflights users in the past 12 months, with the same stopover each way.
Montreal (YUL) is the most affordable one-stop option, with an average return flight price of £579.
What’s the fastest stopover option from London to St. Louis?
Shortest average travel time for one-stop one-way flights from London to St. Louis, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.
Flights via Toronto (YYZ) have the shortest average one-way travel time for one-stop routes: 11h 47m.
Which airport typically offers the quickest stopover for flights from London to St. Louis?
Average stopover duration for one-stop one-way flights from London to St. Louis, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via Toronto (YYZ) offer the fastest connection on this route, with an average stopover time of 1h 29m.
How often are flights from London to St. Louis delayed?
About 15% of weekly flights between London and St. Louis have experienced delays in the past year, with the average delay time being 110 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?
Friday tends to have the lowest number of delays on this route, whereas Tuesday has historically faced a higher average of delays compared to other days of the week.
Which airline has the best punctuality record on London to St. Louis flights?
Over the past year, British Airways have had the lowest number of delays on this route, with just 15% of flights being delayed.
How far ahead should I book a flight from London to St. Louis?
To ensure you get the cheapest price possible for a flight from London to St. Louis, you should look to book at least 69 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.
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 18 October 2026.
See what other customers who have flown with Virgin Atlantic,Aer Lingus, andUnited 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.
First time flying with Virgin. It was everything I hoped it would 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?
Lambert-St Louis (STL) is the airport you will fly into if you book a flight from London to St. Louis. You should not have trouble finding flights to Lambert-St Louis from London; the airport handles an average of 2 inbound flights from London per day. You should also have plenty of airline options to choose from since 10 airlines have flights to the St. Louis airport from London. It is only a 12.7 mi journey from Lambert-St Louis (STL) to St. Louis’s city center.
How long is the flight from London to St. Louis?
For as low as £645, Scandinavian Airlines can have you in St. Louis from London in 16h 23m. Airlines will cover a distance of 4186 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.
What are the cheapest airlines flying from London to St. Louis round-trip?
Our cheapest airline available from London to St. Louis is Air Canada. Our recent data shows that you can find tickets from as low as £305 on this airline. Additional options worth looking into are Lufthansa and United Airlines, starting at £426 and £491 round-trip. These flights start at 58% lower than the current average price 3 months from now.
What are the cheapest airlines to fly from London to St. Louis one-way?
To fly one-way, consider booking your trip with British Airways, which is currently one of the cheapest options available, starting at £345. United Airlines flights start at £360 while deals on Finnair start at £670 one-way.
What are the most popular routes from London to St. Louis?
When deciding which route to take from London to St. Louis consider London Heathrow - Lambert-St Louis, London Gatwick - Lambert-St Louis or London Stansted - Lambert-St Louis as they are the most popular.
What are the most reliable airlines from London to St. Louis?
Consider American Airlines (66%), Aer Lingus (66%) or Finnair (66%) 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 £663. On average you can expect to pay £1,683. The most popular route, (London Heathrow - Lambert-St Louis), can usually be booked for £566.
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, February is the cheapest month in which you can book a flight from London to St. Louis (average of £531). Flying from London to St. Louis in August is currently the most expensive (average of £1,006). 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.
Browse thousands of different options on Cheapflights for your next trip
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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 18 October 2026.
Explore flights to St. Louis departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 18 October 2026.
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 7,457,451 searches. Data last updated 18 October 2026.
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.
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