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Cheap flights from London to St. Louis from £263

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 22/3. Fares are subject to change and may not be available on all flights or dates of travel.
LON — STL
4 Mar — 11 Mar1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from London to Lambert-St Louis are usually found in March or January, booked 48 days in advance, depart on a Thursday or Friday and return on a Monday

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 2 February 2026.

Mon 2/311:30
LHR
-
STL
2 stops18h 06m
Virgin Atlantic
Mon 16/313:39
STL
-
LHR
2 stops15h 36m
Virgin Atlantic
Deal found 1/2£497
Tue 17/309:55
LHR
-
STL
1 stop13h 57m
British Airways
Tue 24/314:06
STL
-
LHR
1 stop12h 14m
British Airways
Deal found 31/1£529
Tue 27/1020:25
LHR
-
STL
2 stops29h 12m
Virgin Atlantic
Mon 2/1117:30
STL
-
LHR
1 stop30h 55m
Virgin Atlantic
Deal found 31/1£535
Wed 18/309:55
LHR
-
STL
1 stop13h 12m
Finnair
Wed 25/310:33
STL
-
LHR
2 stops15h 27m
Finnair
Deal found 1/2£536
Tue 17/315:35
LHR
-
STL
2 stops24h 54m
Finnair
Tue 24/318:37
STL
-
LHR
1 stop10h 48m
Finnair
Deal found 31/1£537
Mon 4/509:20
LHR
-
STL
1 stop14h 24m
Virgin Atlantic
Sun 10/518:04
STL
-
LHR
1 stop31h 06m
Virgin Atlantic
Deal found 31/1£548
Wed 18/308:40
LHR
-
STL
2 stops19h 45m
Delta
Wed 25/312:04
STL
-
LHR
1 stop13h 21m
Delta
Deal found 1/2£550
Wed 18/309:55
LHR
-
STL
1 stop14h 35m
British Airways
Wed 25/316:13
STL
-
LHR
1 stop12h 47m
British Airways
Deal found 1/2£551
Tue 17/306:30
LHR
-
STL
2 stops16h 23m
Virgin Atlantic
Tue 24/312:28
STL
-
LHR
2 stops15h 17m
Virgin Atlantic
Deal found 31/1£552
Mon 20/410:00
LCY
-
STL
2 stops16h 42m
Delta
Wed 13/510:15
STL
-
LCY
2 stops15h 40m
Delta
Deal found 31/1£596
Wed 18/307:50
LCY
-
STL
2 stops18h 21m
British Airways
Wed 25/314:00
STL
-
LCY
2 stops18h 50m
British Airways
Deal found 1/2£628
Wed 18/207:50
LCY
-
STL
2 stops21h 14m
British Airways
Tue 17/314:00
STL
-
LCY
2 stops19h 05m
British Airways
Deal found 31/1£635

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 2 February 2026.

Round-trip from

£521

One-way from

£263

Popular in

July

Cheapest in

March

Average price

£613

Good round-trip deal

£566 or less
Virgin Atlantic
  • Virgin Atlantic
  • 2/3-16/3
  • 3 total stops
  • 29h 19m total
  • London to St. Louis
Search Deals
22/3
  • 22/3
  • 3 total stops
  • 41h 37m total
  • London to St. Louis
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£73 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£11 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 2026
Search Deals
Price to beat on a round-trip 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 2 February 2026.
Use the filters below to find and compare flights from London to St. Louis that are best for you.

Fly from

London

Fly to

St. Louis

Route

Depart

Return

Price

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 2/3

11:30-23:36

2 stops18h 06m

Lambert-St Louis

Mon 16/3

18:59-09:00

1 stop33h 01m

£499

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Tue 17/3

15:35-11:29

2 stops24h 54m

Lambert-St Louis

Tue 24/3

18:37-10:25

1 stop10h 48m

£537

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 18/3

08:40-23:25

2 stops19h 45m

Lambert-St Louis

Wed 25/3

12:04-06:25

1 stop13h 21m

£550

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Tue 17/3

06:30-17:53

2 stops16h 23m

Lambert-St Louis

Tue 24/3

12:28-07:05

1 stop13h 37m

£552

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Tue 17/3

06:30-17:53

2 stops16h 23m

Lambert-St Louis

Tue 24/3

12:04-08:45

2 stops15h 41m

£552

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 2/3

11:45-23:36

2 stops17h 51m

Lambert-St Louis

Mon 16/3

10:50-06:55

2 stops15h 05m

£552

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 11/5

09:55-21:14

2 stops17h 19m

Lambert-St Louis

Thu 14/5

10:43-06:25

1 stop13h 42m

£561

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 20/4

08:40-20:42

2 stops18h 02m

Lambert-St Louis

Wed 13/5

10:43-06:45

1 stop14h 02m

£563

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Thu 16/4

12:25-23:14

1 stop16h 49m

Lambert-St Louis

Thu 23/4

13:02-06:45

1 stop11h 43m

£567

LondonSt. Louis

LCY - STL

LCYSTL

London City

Mon 20/4

10:00-20:42

2 stops16h 42m

Lambert-St Louis

Wed 13/5

10:15-07:55

2 stops15h 40m

£596

Flights are sorted by cheapest return flights first.

Deals found on 31/1

Showing 1-10 of 60 results
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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

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 30 January 2026.

To ensure you get the cheapest price possible for a flight from London to St. Louis, you should look to book at least 48 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, September is the cheapest month in which you can book a flight from London to St. Louis (average of £397). Flying from London to St. Louis in July is currently the most expensive (average of £594). 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’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 58% 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 £367.

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.

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 2 February 2026.
See what other customers who have flown with Finnair, United Airlines, andAir Canada 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.
Finnair
7.6
Good
1,357 reviews
Check prices

Boarding

7.7

Comfort

7.5

Food

6.7

Crew

8.2

Overall

7.6

Entertainment

6.9

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights
Finnair
7.6
Good
1,357 reviews
Finnair
7.6
Good
1,357 reviews
Check prices

Boarding

7.7

Comfort

7.5

Food

6.7

Crew

8.2

Overall

7.6

Entertainment

6.9

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights
United Airlines
7.4
Good
9,229 reviews
Finnair
7.6
Good
1,357 reviews
Check prices

Boarding

7.7

Comfort

7.5

Food

6.7

Crew

8.2

Overall

7.6

Entertainment

6.9

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights
Air Canada
7.1
Good
10,673 reviews
Finnair
7.6
Good
1,357 reviews
Check prices

Boarding

7.7

Comfort

7.5

Food

6.7

Crew

8.2

Overall

7.6

Entertainment

6.9

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights
Iberia
7.0
Good
3,101 reviews
Finnair
7.6
Good
1,357 reviews
Check prices

Boarding

7.7

Comfort

7.5

Food

6.7

Crew

8.2

Overall

7.6

Entertainment

6.9

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights
British Airways
6.7
Okay
7,709 reviews
Finnair
7.6
Good
1,357 reviews
Check prices

Boarding

7.7

Comfort

7.5

Food

6.7

Crew

8.2

Overall

7.6

Entertainment

6.9

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights

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 £499, Virgin Atlantic can have you in St. Louis from London in 18h 06m. 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 £167 on this airline. Additional options worth looking into are United Airlines and British Airways, starting at £463 and £468 round-trip. These flights start at 76% 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 £336. Finnair flights start at £354 while deals on Virgin Atlantic start at £502 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 cheapest flights from London to St. Louis?

    The cheapest flight price from London to St. Louis is £471. On average you can expect to pay £664. The most popular route, (London Heathrow - Lambert-St Louis), can usually be booked for £497.

  • Where are the most common stopover locations when flying from London to St. Louis?

    The most popular stopover on flights from London to St. Louis is Chicago.

  • What are some popular things to do or see while on a stopover in Chicago?

    Grant Park, Magnificent Mile, and River North are currently the most popular points of interest in Chicago at the moment. Grant Park, Magnificent Mile, and River North are located about 16.2 mi, 15.5 mi, and 15.0 mi, respectively from Chicago O'Hare Intl. Travellers in need of a car in Chicago can hire one for about £40 per day.

  • Where are the least popular stopover locations for London to St. Louis flights?

    London to St. Louis flights have a stopover in Philadelphia the least frequently.

  • 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, September is the cheapest month in which you can book a flight from London to St. Louis (average of £397). Flying from London to St. Louis in July is currently the most expensive (average of £594). 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

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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 2 February 2026.
British Airways flights from London to Lambert-St Louis
Finnair flights from London to Lambert-St Louis
Virgin Atlantic 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 2 February 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest£167Average£750FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
United AirlinesCheapest£463Average£721FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
British AirwaysCheapest£468Average£753FlexibilityNo cancel feeOn-time70%
Search British Airways flights
KLMCheapest£493Average£808FlexibilityNo cancel feeOn-time75%
Search KLM flights
FinnairCheapest£498Average£678FlexibilityNo cancel feeOn-time76%
Search Finnair flights
Virgin AtlanticCheapest£544Average£842FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Air CanadaCheapest£590Average£726FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
IberiaCheapest£641Average£714FlexibilityNo cancel feeOn-time77%
Search Iberia flights
LufthansaCheapest£646Average£785FlexibilityNo cancel feeOn-time76%
Search Lufthansa 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.

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