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Cheap flights from London to St. Louis from £258

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 13/5. Fares are subject to change and may not be available on all flights or dates of travel.
LON — STL
4 May — 11 May1
1 adult

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 29 April 2025.

Round-trip from

£593

One-way from

£258

Popular in

December

Cheapest in

March

Average price

£701
12/6-19/6
  • 12/6-19/6
  • 2 total stops
  • 50h 06m total
  • London to St. Louis
Search Deals
13/5
  • 13/5
  • 1 total stop
  • 16h 06m total
  • London to St. Louis
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (£26 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£23 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 2025
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Find flight deals from London to St. Louis

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 29 April 2025.

Thu 8/514:00LGW - STL
1 stop16h 06mMultiple Airlines
Sat 24/517:35STL - LGW
1 stop34h 35mMultiple Airlines
Deal found 28/4£537
Thu 12/613:45LHR - STL
3 stops33h 19mMultiple Airlines
Thu 19/618:12STL - LHR
3 stops30h 23mMultiple Airlines
Deal found 28/4£645
Tue 6/519:30LHR - STL
2 stops31h 28mBritish Airways
Mon 19/516:15STL - LHR
1 stop12h 15mBritish Airways
Deal found 28/4£671
Thu 12/606:40LHR - STL
2 stops20h 54mScandinavian Airlines
Thu 19/613:30STL - LHR
2 stops23h 00mScandinavian Airlines
Deal found 28/4£674
Thu 12/612:30LHR - STL
1 stop13h 49mIberia
Thu 19/613:21STL - LHR
1 stop11h 59mIberia
Deal found 27/4£688
Sat 4/1008:30LHR - STL
2 stops33h 55mLufthansa
Wed 22/1012:28STL - LHR
1 stop11h 52mLufthansa
Deal found 28/4£689
Tue 10/608:45LCY - STL
2 stops33h 51mMultiple Airlines
Tue 17/607:30STL - LCY
2 stops29h 15mMultiple Airlines
Deal found 28/4£730
Mon 5/517:40LHR - STL
2 stops32h 18mAir Canada
Sun 18/513:30STL - LHR
1 stop11h 00mAir Canada
Deal found 28/4£743
Mon 5/509:30LHR - STL
1 stop16h 28mUnited Airlines
Sun 18/513:30STL - LHR
1 stop11h 00mUnited Airlines
Deal found 28/4£750
Thu 12/606:05LTN - STL
2 stops19h 38mMultiple Airlines
Thu 19/607:30STL - LTN
3 stops19h 45mMultiple Airlines
Deal found 28/4£762
Thu 12/606:55STN - STL
3 stops35h 41mMultiple Airlines
Thu 19/607:30STL - STN
3 stops22h 10mMultiple Airlines
Deal found 28/4£794
Tue 8/717:00LCY - STL
2 stops28h 47mLufthansa
Tue 16/908:15STL - LCY
2 stops17h 55mLufthansa
Deal found 28/4£861

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 29 April 2025.
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

LGW - STL

LGWSTL

London Gatwick

Thu 12/6

14:00-23:53

1 stop15h 53m

Lambert-St Louis

Thu 19/6

17:47-10:00

1 stop34h 13m

£593

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Thu 12/6

13:45-17:04

3 stops33h 19m

Lambert-St Louis

Thu 19/6

18:12-06:35

3 stops30h 23m

£645

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Thu 12/6

06:40-21:34

2 stops20h 54m

Lambert-St Louis

Thu 19/6

13:30-18:30

2 stops23h 00m

£674

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 26/5

06:15-20:58

2 stops20h 43m

Lambert-St Louis

Mon 2/6

10:31-07:20

1 stop14h 49m

£686

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Thu 12/6

12:30-20:19

1 stop13h 49m

Lambert-St Louis

Thu 19/6

13:21-07:20

1 stop11h 59m

£688

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Sat 4/10

08:30-12:25

2 stops33h 55m

Lambert-St Louis

Wed 22/10

12:28-06:20

1 stop11h 52m

£689

LondonSt. Louis

LCY - STL

LCYSTL

London City

Tue 10/6

08:45-12:36

2 stops33h 51m

Lambert-St Louis

Tue 17/6

06:30-18:45

3 stops30h 15m

£730

LondonSt. Louis

LTN - STL

LTNSTL

London Luton

Thu 12/6

06:05-19:43

2 stops19h 38m

Lambert-St Louis

Thu 19/6

07:30-09:15

3 stops19h 45m

£762

LondonSt. Louis

STN - STL

STNSTL

London Stansted

Thu 12/6

06:55-12:36

3 stops35h 41m

Lambert-St Louis

Thu 19/6

07:30-11:40

3 stops22h 10m

£794

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Tue 8/7

06:50-15:47

2 stops14h 57m

Lambert-St Louis

Thu 18/9

11:05-11:35

1 stop18h 30m

£802

Flights are sorted by cheapest return flights first.

Deals found on 28/4

Showing 1-10 of 45 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 25 April 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 29 April 2025.

It’s typically best to fly out from London to St. Louis in the evening. Doing so could potentially save you 15% 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.

Rainfall in St. Louis by month

Plan your trip to St. Louis by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in St. Louis ranges from 56.0 - 119.0 inches per month. May is typically the wettest month, when rainfall can reach 119.0 mm. February is typically the driest time to visit St. Louis when rainfall is around 56.0 mm.

Temperature in St. Louis by month

Plan your trip to St. Louis by taking into account the average temperature totals by month.

If weather is an important factor for your trip to St. Louis, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 27.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 0.0 C).

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 29 April 2025.
Get a feel of what it's like to fly with Delta, KLM and Austrian Airlines from London to St. Louis by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very Good
7,929 reviews
Check prices

Comfort

7.9

Crew

8.5

Overall

8.0

Entertainment

7.9

Food

7.3

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very Good
7,929 reviews
Delta
8.0
Very Good
7,929 reviews
Check prices

Comfort

7.9

Crew

8.5

Overall

8.0

Entertainment

7.9

Food

7.3

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
KLM
7.8
Good
1,333 reviews
Delta
8.0
Very Good
7,929 reviews
Check prices

Comfort

7.9

Crew

8.5

Overall

8.0

Entertainment

7.9

Food

7.3

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Austrian Airlines
7.6
Good
780 reviews
Delta
8.0
Very Good
7,929 reviews
Check prices

Comfort

7.9

Crew

8.5

Overall

8.0

Entertainment

7.9

Food

7.3

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Air France
7.4
Good
1,444 reviews
Delta
8.0
Very Good
7,929 reviews
Check prices

Comfort

7.9

Crew

8.5

Overall

8.0

Entertainment

7.9

Food

7.3

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
United Airlines
7.4
Good
8,696 reviews
Delta
8.0
Very Good
7,929 reviews
Check prices

Comfort

7.9

Crew

8.5

Overall

8.0

Entertainment

7.9

Food

7.3

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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 7 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.

  • What are the cheapest airlines flying from London to St. Louis round-trip?

    Our cheapest airline available from London to St. Louis is Scandinavian Airlines. Our recent data shows that you can find tickets from as low as £674 on this airline. Additional options worth looking into are British Airways and Iberia, starting at £686 and £688 round-trip. These flights start at 4% 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 Aer Lingus, which is currently one of the cheapest options available, starting at £731. Iberia flights start at £793 while deals on Lufthansa start at £877 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 City - Lambert-St Louis as they are the most popular.

  • 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 North Pier Apartments are currently the most popular points of interest in Chicago at the moment. Grant Park, Magnificent Mile, and North Pier Apartments are located about 16.2 mi, 15.5 mi, and 16.1 mi, respectively from Chicago O'Hare Intl. Travellers in need of a car in Chicago can hire one for about £41 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, 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.

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 29 April 2025.
Finnair flights from London to Lambert-St Louis
British Airways flights from London to Lambert-St Louis
Virgin Atlantic flights from London to Lambert-St Louis

Top 7 airlines flying from London to St. Louis

Discover the top 7 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 29 April 2025.
AirlineCheapestAverageFlexibilityOn-time
FinnairCheapest£509Average£651FlexibilityNo cancel feeOn-time76%
Search Finnair flights
IberiaCheapest£603Average£725FlexibilityNo cancel feeOn-time77%
Search Iberia flights
British AirwaysCheapest£631Average£812FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Virgin AtlanticCheapest£638Average£837FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
United AirlinesCheapest£641Average£851FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
LufthansaCheapest£679Average£829FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Air CanadaCheapest£705Average£862FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

Fly with Cheapflights

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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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