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Cheap flights from St. Louis to London from £193

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 23/10. Fares are subject to change and may not be available on all flights or dates of travel.
STL — LON
6 Sep — 13 Sep1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Lambert-St Louis to London are usually found in October or January, booked 12 days in advance, depart on a Wednesday or Tuesday and return on a Friday

Cheap flight deals from St. Louis to London

Enter your travel dates to find the best prices.

Cheapest flights from St. Louis to London
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 7 August 2026.

Sun 27/921:40 -
Nonstop8h 00m
Tue 6/1013:00 -
1 stop16h 43m
Deal found 6/8£710
Fri 16/1012:10 -
1 stop12h 20m
Fri 23/1006:30 -
1 stop12h 55m
Deal found 6/8£710
Sun 6/914:40 -
2 stops16h 45m
Sun 13/918:55 -
2 stops24h 30m
Deal found 7/8£710
Wed 16/912:10 -
1 stop12h 20m
Fri 25/909:30 -
1 stop15h 11m
Deal found 7/8£711
Wed 7/1021:35 -
Nonstop8h 00m
Fri 16/1012:15 -
1 stop14h 42m
Deal found 6/8£713
Sun 27/921:40 -
Nonstop8h 00m
Fri 9/1015:15 -
1 stop14h 54m
Deal found 7/8£713
Sun 4/1012:00 -
2 stops14h 50m
Tue 13/1010:00 -
2 stops17h 23m
Deal found 5/8£716
Thu 17/912:10 -
1 stop15h 50m
Tue 22/906:30 -
1 stop12h 55m
Deal found 6/8£716
Wed 2/910:33 -
2 stops15h 22m
Tue 8/909:20 -
2 stops16h 38m
Deal found 4/8£717
Wed 7/1021:35 -
Nonstop8h 00m
Wed 21/1016:25 -
Nonstop9h 05m
Deal found 2/8£717
Tue 27/1016:05 -
2 stops15h 45m
Wed 4/1109:15 -
2 stops36h 11m
Deal found 4/8£718
Wed 7/1013:29 -
2 stops17h 11m
Mon 12/1019:30 -
2 stops31h 51m
Deal found 4/8£718

Find 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 7 August 2026.

Round-trip from

£710

One-way from

£193

Popular in

June

Cheapest in

October

Average price

£667
British Airways
  • British Airways
  • 27/9-6/10
  • 1 total stop
  • 24h 43m total
  • St. Louis to London
Search Deals
23/10
  • 23/10
  • 2 total stops
  • 41h 25m total
  • St. Louis to London
Search Deals
Highest demand for flights based on searches. 26% potential increase in price (£175 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£24 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 2026
Search Deals

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 7 August 2026.
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

Cheapest return flight

St. LouisLondon

STL Lambert-St Louis - LTN London Luton

STLLTN

Lambert-St Louis

Sun 6/9

14:40-13:25

2 stops16h 45m

London Luton

Sun 13/9

18:55-13:25

2 stops24h 30m

£710

St. LouisLondon

STL Lambert-St Louis - LCY London City

STLLCY

Lambert-St Louis

Sat 9/1

11:45-16:40

2 stops22h 55m

London City

Wed 13/1

09:50-23:09

2 stops19h 19m

£711

St. LouisLondon

STL Lambert-St Louis - LCY London City

STLLCY

Lambert-St Louis

Wed 13/1

16:05-12:50

2 stops14h 45m

London City

Tue 19/1

09:15-15:26

2 stops36h 11m

£716

St. LouisLondon

STL Lambert-St Louis - LCY London City

STLLCY

Lambert-St Louis

Wed 2/9

10:33-07:55

2 stops15h 22m

London City

Tue 8/9

09:20-19:58

2 stops16h 38m

£717

St. LouisLondon

STL Lambert-St Louis - LCY London City

STLLCY

Lambert-St Louis

Wed 25/11

16:05-17:05

2 stops19h 00m

London City

Wed 2/12

09:15-15:26

2 stops36h 11m

£727

St. LouisLondon

STL Lambert-St Louis - LHR London Heathrow

STLLHR

Lambert-St Louis

Fri 18/9

12:10-10:00

1 stop15h 50m

London Heathrow

Fri 25/9

06:50-21:21

2 stops20h 31m

£732

St. LouisLondon

STL Lambert-St Louis - LTN London Luton

STLLTN

Lambert-St Louis

Mon 19/10

14:40-12:45

2 stops16h 05m

London Luton

Sat 24/10

21:25-15:26

2 stops24h 01m

£732
Fastest return journey

St. LouisLondon

STL Lambert-St Louis - LHR London Heathrow

STLLHR

Lambert-St Louis

Fri 23/10

21:35-11:35

Nonstop8h 00m

London Heathrow

Thu 29/10

11:00-20:57

1 stop14h 57m

£750

St. LouisLondon

STL Lambert-St Louis - LGW London Gatwick

STLLGW

Lambert-St Louis

Wed 23/9

14:15-14:40

2 stops18h 25m

London Gatwick

Wed 30/9

15:40-23:15

2 stops37h 35m

£756

St. LouisLondon

STL Lambert-St Louis - LHR London Heathrow

STLLHR

Lambert-St Louis

Thu 17/9

07:05-07:15

1 stop18h 10m

London Heathrow

Sat 26/9

06:30-16:47

2 stops16h 17m

£769

Flights are sorted by cheapest return flights first.

Deals found on 3/8

Showing 1-10 of 60 resultsSorted by cheapest first
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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.
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 St. Louis to London

What is the cheapest month to book a flight from St. Louis to London?

Currently, October is the cheapest month in which you can book a flight from St. Louis to London (average of £494). Flying from St. Louis to London in June is currently the most expensive (average of £1,041). 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 7 August 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from St. Louis to London as you normally would.

How much does it cost for a return flight from St. Louis to London?

Airfare is typical for this route at the moment.
St. Louis to London flights typically cost between £494 and £732 in September.
The cheapest return price found within the last 5 days was £710 on British Airways (27 Sept–6 Oct).

What’s the top stopover airport for flights from St. Louis to London?

Share of one-stop return flights from St. Louis to London chosen by Cheapflights users in the past 12 months, using the same stopover each way.

Atlanta (ATL) – chosen by Cheapflights users on 60% of one-stop itineraries from St. Louis to London on Cheapflights.

What’s the cheapest stopover airport for flights from St. Louis to London?

Average return fare for one-stop flights from St. Louis to London, chosen by Cheapflights users in the past 12 months, with the same stopover each way.

Atlanta (ATL) is the most affordable one-stop option, with an average return flight price of £475.

What’s the fastest stopover option from St. Louis to London?

Shortest average travel time for one-stop one-way flights from St. Louis to London, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.

Flights via Chicago (ORD) have the shortest average one-way travel time for one-stop routes: 11h 17m.

Which airport typically offers the quickest stopover for flights from St. Louis to London?

Average stopover duration for one-stop one-way flights from St. Louis to London, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Atlanta (ATL) offer the fastest connection on this route, with an average stopover time of 1h 41m.

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

About 21% of weekly flights between St. Louis and London have experienced delays in the past year, with the average delay time being 131 minutes.

What is the most punctual flight time for St. Louis to London flights?

Historically, flights departing at night are less likely to be delayed, whereas flights leaving at night 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 St. Louis to London flights?

Over the past year, British Airways have had the lowest number of delays on this route, with just 21% of flights being delayed.

How far ahead should I book a flight from St. Louis to London?

Booking 11 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.

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.

  • What airport do you fly from for flights from St. Louis to London?

    Most people fly from Lambert-St Louis (STL) if they book a flight from St. Louis to London. On average, Lambert-St Louis has 2 outbound flights to London per day from 2 airlines. Lambert-St Louis is conveniently located just 12.7 mi from St. Louis’s city center.

  • How long is the flight from St. Louis to London?

    A quick flight from St. Louis to London can take about 15h 22m. Lufthansa provides one of the quickest options available for as low as £717. The distance between St. Louis and London is about 4205 mi. Both multi-stop and direct flights can be found to your destination and back.

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

    British Airways, at £430, was found to be the cheapest airline from St. Louis to London. An alternate airline flying to your destination would be Virgin Atlantic. Users have found that British Airways is 36% cheaper than the other options available to this destination.

  • What are the most popular routes from St. Louis to London?

    While some choose either Lambert-St Louis - London Gatwick or Lambert-St Louis - London Stansted, Lambert-St Louis - London Heathrow is the most popular route from St. Louis to London.

  • What are the most reliable airlines from St. Louis to London?

    The top 3 most reliable airlines when flying from St. Louis to London are American Airlines (66%), Aer Lingus (66%) and Finnair (66%).

  • Can I find deals for flights from St. Louis to London that include hotel bookings?

    Yes. In addition to deals on St. Louis to London flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to London?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to London.

  • Can I find deals for business class flights from St. Louis to London?

    Yes. Cheapflights offers flight deals from St. Louis to London 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 St. Louis to London?

    Currently, October is the cheapest month in which you can book a flight from St. Louis to London (average of £494). Flying from St. Louis to London in June is currently the most expensive (average of £1,041). 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

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
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Gatwick
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Southall
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Borehamwood

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Top 2 airlines flying from St. Louis to London

Discover the top 2 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 7 August 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£430Average£563FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Virgin AtlanticCheapest£468Average£580FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights

Fly with Cheapflights

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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.

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