Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from London to St. Louis from £252

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 2/9. Fares are subject to change and may not be available on all flights or dates of travel.
LON — STL
3 Sep — 10 Sep1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from London to Lambert-St Louis are usually found in February or January, booked 79 days in advance, depart on a Friday or Thursday and return on a Wednesday

Cheap flight deals from London to St. Louis

Enter your travel dates to find the best prices.

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 4 August 2026.

Wed 28/1006:40 -
2 stops22h 14m
Sun 1/1112:00 -
2 stops24h 30m
Deal found 4/8£612
Tue 1/906:30 -
1 stop12h 55m
Tue 8/912:28 -
1 stop14h 52m
Deal found 3/8£613
Wed 2/908:40 -
2 stops16h 02m
Wed 23/912:10 -
1 stop12h 20m
Deal found 4/8£614
Wed 9/908:40 -
2 stops16h 01m
Wed 23/912:10 -
1 stop15h 50m
Deal found 4/8£615
Wed 2/916:25 -
Nonstop9h 05m
Wed 30/912:46 -
1 stop18h 04m
Deal found 4/8£617
Wed 2/910:05 -
1 stop16h 21m
Fri 11/917:18 -
1 stop11h 32m
Deal found 4/8£617
Sun 30/806:40 -
3 stops23h 18m
Sun 6/913:04 -
2 stops20h 56m
Deal found 2/8£619
Wed 23/909:45 -
1 stop16h 59m
Fri 2/1012:46 -
1 stop14h 19m
Deal found 3/8£620
Thu 3/914:00 -
1 stop31h 28m
Thu 10/918:39 -
1 stop33h 21m
Deal found 4/8£620
Thu 15/1014:00 -
1 stop35h 39m
Mon 26/1020:34 -
1 stop28h 26m
Deal found 3/8£620
Wed 16/908:55 -
1 stop16h 12m
Wed 23/921:35 -
Nonstop8h 00m
Deal found 1/8£622
Fri 4/914:00 -
1 stop32h 11m
Sun 20/920:10 -
2 stops31h 50m
Deal found 4/8£625

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 4 August 2026.

Round-trip from

£612

One-way from

£252

Popular in

August

Cheapest in

February

Average price

£879

Good round-trip deal

£858 or less

Good one-way deal

£854 or less
Scandinavian Airlines
  • Scandinavian Airlines
  • 28/10-1/11
  • 4 total stops
  • 46h 44m total
  • London to St. Louis
Search Deals
2/9
  • 2/9
  • 2 total stops
  • 33h 22m total
  • London to St. Louis
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (£43 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£10 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 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

 
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 4 August 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 - STL

LGWSTL

London Gatwick

Thu 3/9

14:00-15:28

1 stop31h 28m

Lambert-St Louis

Thu 10/9

18:39-10:00

1 stop33h 21m

£620

LondonSt. Louis

LGW - STL

LGWSTL

London Gatwick

Thu 15/10

14:00-19:39

1 stop35h 39m

Lambert-St Louis

Mon 26/10

20:34-06:00

1 stop28h 26m

£620

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 23/11

09:00-19:23

2 stops16h 23m

Lambert-St Louis

Mon 30/11

18:50-15:50

2 stops15h 00m

£633
Fastest return journey

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Tue 1/9

16:25-19:30

Nonstop9h 05m

Lambert-St Louis

Wed 16/9

13:54-06:55

1 stop11h 01m

£649

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 30/11

12:05-22:26

1 stop16h 21m

Lambert-St Louis

Thu 3/12

11:25-07:55

1 stop14h 30m

£658

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 30/11

07:30-19:25

2 stops17h 55m

Lambert-St Louis

Thu 3/12

14:54-09:10

1 stop12h 16m

£660

LondonSt. Louis

LCY - STL

LCYSTL

London City

Tue 15/9

20:15-15:54

2 stops25h 39m

Lambert-St Louis

Tue 29/9

13:55-09:30

2 stops13h 35m

£662

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 16/9

12:15-20:44

1 stop14h 29m

Lambert-St Louis

Wed 23/9

21:35-11:35

Nonstop8h 00m

£678

LondonSt. Louis

LCY - STL

LCYSTL

London City

Wed 28/10

09:50-15:26

2 stops34h 36m

Lambert-St Louis

Tue 3/11

16:05-12:50

2 stops14h 45m

£686

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Tue 1/9

07:25-17:06

2 stops15h 41m

Lambert-St Louis

Sun 6/9

18:54-06:45

1 stop29h 51m

£693

Flights are sorted by cheapest return flights first.

Deals found on 1/8

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
...
6

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 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

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 £569). Flying from London to St. Louis in December is currently the most expensive (average of £914). 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 4 August 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 £700 and £989 in October.
The cheapest return price found within the last 5 days was £612 on Scandinavian Airlines (28 Oct–1 Nov).

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.

Chicago (ORD) – chosen by Cheapflights users on 35% 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.

Reykjavik (KEF) is the most affordable one-stop option, with an average return flight price of £374.

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 Reykjavik (KEF) have the shortest average one-way travel time for one-stop routes: 11h 05m.

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 Reykjavik (KEF) offer the fastest connection on this route, with an average stopover time of 0h 55m.

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

About 12% of weekly flights between London and St. Louis have experienced delays in the past year, with the average delay time being 118 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 Wednesday 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 12% 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 70 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 4 August 2026.
See what other customers who have flown with Virgin Atlantic,United Airlines, andAmerican 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.
Virgin Atlantic
7.5
Good
694 reviews
Check prices

Comfort

7.3

Boarding

7.7

Crew

8.1

Entertainment

7.5

Overall

7.5

Food

6.9

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
Virgin Atlantic
7.5
Good
694 reviews
Virgin Atlantic
7.5
Good
694 reviews
Check prices

Comfort

7.3

Boarding

7.7

Crew

8.1

Entertainment

7.5

Overall

7.5

Food

6.9

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
United Airlines
7.4
Good
10,060 reviews
Virgin Atlantic
7.5
Good
694 reviews
Check prices

Comfort

7.3

Boarding

7.7

Crew

8.1

Entertainment

7.5

Overall

7.5

Food

6.9

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
American Airlines
7.1
Good
11,846 reviews
Virgin Atlantic
7.5
Good
694 reviews
Check prices

Comfort

7.3

Boarding

7.7

Crew

8.1

Entertainment

7.5

Overall

7.5

Food

6.9

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
Air Canada
7.1
Good
11,428 reviews
Virgin Atlantic
7.5
Good
694 reviews
Check prices

Comfort

7.3

Boarding

7.7

Crew

8.1

Entertainment

7.5

Overall

7.5

Food

6.9

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
British Airways
6.7
Okay
8,148 reviews
Virgin Atlantic
7.5
Good
694 reviews
Check prices

Comfort

7.3

Boarding

7.7

Crew

8.1

Entertainment

7.5

Overall

7.5

Food

6.9

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

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 0 inbound flights from London per day. You should also have plenty of airline options to choose from since 9 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 £649, United Airlines can have you in St. Louis from London in 9h 05m. 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 American Airlines. Our recent data shows that you can find tickets from as low as £221 on this airline. Additional options worth looking into are Aer Lingus and Lufthansa, starting at £367 and £423 round-trip. These flights start at 70% 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 £342. United Airlines flights start at £357 while deals on Finnair start at £361 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 (77%), Aer Lingus (77%) or Finnair (77%) 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 £728. On average you can expect to pay £934. The most popular route, (London Heathrow - Lambert-St Louis), can usually be booked for £513.

  • 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 holiday 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, February is the cheapest month in which you can book a flight from London to St. Louis (average of £569). Flying from London to St. Louis in December is currently the most expensive (average of £914). 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

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 4 August 2026.
British Airways flights from London to Lambert-St Louis
Virgin Atlantic flights from London to Lambert-St Louis
Finnair flights from London to Lambert-St Louis

Top 9 airlines flying from London to St. Louis

Discover the top 9 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 4 August 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest£221Average£736FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Aer LingusCheapest£367Average£726FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
LufthansaCheapest£423Average£700FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
United AirlinesCheapest£472Average£717FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
British AirwaysCheapest£480Average£757FlexibilityNo cancel feeOn-time70%
Search British Airways flights
KLMCheapest£502Average£745FlexibilityNo cancel feeOn-time75%
Search KLM flights
Virgin AtlanticCheapest£554Average£765FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
FinnairCheapest£559Average£695FlexibilityNo cancel feeOn-time76%
Search Finnair flights
Air CanadaCheapest£567Average£690FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.