LON - STL

$540 Find Cheap Flights from London to St. Louis

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from London to St. Louis departing on 10/24. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to St. Louis

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to St. Louis, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to St. Louis, as well as popular online travel agencies
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Flights Deals

Cheap Flights from London to St. Louis (LON-STL)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from London to St. Louis that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from London to St. Louis

Sun, Aug 24 - Tue, Sep 9
Logo
2:00 pm - 2:21 pmLGW-STL
30h 21m1 stop
Logo
7:55 pm - 10:55 amSTL-LGW
33h 00m2 stops
$705
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Sat, Sep 20 - Wed, Oct 8
Logo
2:00 pm - 1:35 pmLGW-STL
29h 35m2 stops
Logo
9:15 am - 7:40 pmSTL-LGW
28h 25m3 stops
$722
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Wed, Aug 13 - Wed, Sep 3
United Airlines Logo
3:20 pm - 11:35 pmLHR-STL
14h 15m1 stop
United Airlines Logo
6:00 am - 6:30 amSTL-LHR
18h 30m2 stops
$821United Airlines
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Wed, Aug 13 - Wed, Sep 3
United Airlines Logo
3:20 pm - 11:35 pmLHR-STL
14h 15m1 stop
United Airlines Logo
6:00 am - 6:45 amSTL-LHR
18h 45m1 stop
$828United Airlines
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Thu, Oct 16 - Tue, Oct 21
Scandinavian Airlines Logo
6:40 am - 11:39 pmLHR-STL
22h 59m2 stops
Scandinavian Airlines Logo
1:30 pm - 6:30 pmSTL-LHR
23h 00m2 stops
$845Scandinavian Airlines
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Mon, Sep 8 - Fri, Sep 19
Lufthansa Logo
9:30 am - 7:57 pmLHR-STL
16h 27m1 stop
Lufthansa Logo
5:22 pm - 10:10 amSTL-LHR
10h 48m1 stop
$936Lufthansa
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Mon, Sep 8 - Fri, Sep 19
Lufthansa Logo
5:40 pm - 2:19 pmLHR-STL
26h 39m2 stops
Lufthansa Logo
5:22 pm - 10:10 amSTL-LHR
10h 48m1 stop
$948Lufthansa
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Tue, Nov 25 - Mon, Dec 1
British Airways Logo
2:10 pm - 8:00 pmLHR-STL
11h 50m1 stop
British Airways Logo
5:57 pm - 11:40 amSTL-LHR
11h 43m1 stop
$959British Airways
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Wed, Aug 13 - Wed, Sep 3
Scandinavian Airlines Logo
6:40 am - 10:02 pmLHR-STL
21h 22m2 stops
Scandinavian Airlines Logo
3:36 pm - 5:40 pmSTL-LHR
20h 04m2 stops
$1,001Scandinavian Airlines
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Thu, Jul 24 - Sun, Aug 10
British Airways Logo
7:00 am - 8:24 pmLCY-STL
19h 24m2 stops
British Airways Logo
1:15 pm - 12:10 pmSTL-LCY
16h 55m2 stops
$1,721British Airways
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Useful Info

KAYAK's insights & trends for London to St. Louis flights

Get data-powered insights and trends into flights from London to St. Louis to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from London to St. Louis?

What’s the cheapest day of the week to fly from London to St. Louis?

The average price of all round-trip flights from London to St. Louis clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to St. Louis on a Thursday and more expensive on a Saturday. On your return trip to London, you should consider flying back on a Thursday, and avoid Fridays for better deals.

What is the cheapest month to fly from London to St. Louis?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from London to St. Louis, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from London to St. Louis is March, where tickets cost $740 (return) on average. On the other hand, the most expensive months are December and August, where the average cost of round-trip tickets is $1,368 and $1,261 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from London to St. Louis, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from London to St. Louis, you should book around 4 weeks before departure. For the absolute cheapest price, our data suggests you should book 4 weeks before departure.

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Good to know

Low seasonJanuary
High seasonJuly
Cheapest flight$540
Best time to beat the crowds with an average 22% drop in price.
Most popular time to fly with an average 21% increase in price.
Flight from London Gatwick Airport to St. Louis

When to book flights from London to St. Louis

Are your dates flexible? Find out the best times to travel from London to St. Louis based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from London to St. Louis

  • Are there fast track facilities at London Airports?

    You can speed up your journey through London Airports using the fast track system. At Heathrow Airport (LHR), fast-track passes cost about £12.50, while at Gatwick Airport (LGW), they cost about £5. Both fast-track services help you skip through security, allowing you more time to enjoy the departure lounge.

  • How can I get from St Louis Airport (STL) to the city centre?

    Getting to the city centre from St Louis Airport (STL) is easy, with a few transport options available. The MLR Red Line to Lambert East TRML Metrolink Station is a low-cost choice. The Red Line takes about 29min and has 12 stops. However, if you want to get to the city quicker, you can get a taxi from the front of the terminal, which takes around 19min.

  • Are there hotels at London Airport?

    If your flight is early in the morning, you can ensure you’re not in a rush by getting a hotel the night before. For example, at Heathrow Airport, you can go to the Ibis London Heathrow Airport, whereas at Gatwick Airport, you can go to Hilton London Gatwick Airport. The hotels are only a short walk to the terminal on the morning of your flight.

  • Can I use a currency exchange at St. Louis Airport?

    When you land at St. Louis Airport, you can use the Banking and Foreign Currency Exchange to convert your Pound Sterling to US Dollar. The currency exchange is in Terminal 1 on the lower level close to the Gate C Security checkpoint.

  • What is the cheapest flight from London to St. Louis?

    In the last 3 days, the lowest price for a flight from London to St. Louis was $540 for a one-way ticket and $705 for a round-trip.

  • Do I need a passport to fly between London and St. Louis?

    A passport is required to fly from London to St. Louis.

  • Which airports will I be using when flying from London to St. Louis?

    When flying out of London you will be using one of these airports: London Gatwick or London Heathrow. You will be landing at Lambert-St Louis.

  • Which aircraft models fly most regularly from London to St. Louis?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from London to St. Louis?

    Star Alliance, oneworld, and SkyTeam are the airline alliances operating flights between London and St. Louis, with Star Alliance being the most commonly used for this route.

  • How does KAYAK find such low prices on flights from London to St. Louis?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from London to St. Louis.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from London to St. Louis?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to St. Louis from London is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from London to St. Louis?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to St. Louis with an airline and back to London with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from London to St. Louis?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to St. Louis from London up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from London to St. Louis

  • If you’re flying from London Airports, you can relax in an airport lounge before taking off. Most flights on this route depart from Heathrow Airport (LHR), and the Club Aspire Lounge in Terminal 5 is a good option for about £40. Those flying from Gatwick Airport (LGW) can enjoy the Plaza Premium Lounge in the North Terminal for around £28. Both lounges offer food, drink and complimentary wi-fi.
  • As several airports operate the route from London Airports to St. Louis, you can pick where you depart from based on convenience. For example, if you’re starting your journey from the southwest or Midlands, Heathrow is a great airport. On the other hand, Gatwick might be the easiest airport to reach if you’re in the south of the UK.
  • Once you’ve touched down at St. Louis Airport (STL), travelling to nearby places is easy. For example, you can drive to Columbia in about 1h 35min, Springfield in around 1h 30min or Chesterfield in approximately 20min.
  • With London's excellent transport system, you will find it easy to travel to any of London Airports for your flight. If your flight departs from Heathrow Airport, you can take the Heathrow Express from London Paddington Train Station in approximately 15min. For those departing from Gatwick Airport, there is the Gatwick Express that leaves from London Victoria train station and takes around 30min.
  • If you have a disability and you're flying from London Airports, you can request help upon arrival at the terminal. However, we suggest you call your airline at least 48h before take-off so that they can arrange for suitable assistance.

Reviews of the top airline flying from London to St. Louis

 
See real verified KAYAK customer reviews for airlines flying from London to St. Louis. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from London to St. Louis? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
6.6
British AirwaysOverall score based on 7089 reviews
6.4Entertainment
6.3Food
6.8Boarding
7.6Crew
6.7Comfort
Airline reviews

The flight was an hour late leaving Heathrow. The food was mediocre. When we got to Austin, my husband’s luggage was missing. He filled out information at baggage claim. We are waiting to hear something. His name is Henry Jacob Braunig.

4.0 OkayAnonymous, Jul 2025LHR - AUS
Read more British Airways reviews

The flight was an hour late leaving Heathrow. The food was mediocre. When we got to Austin, my husband’s luggage was missing. He filled out information at baggage claim. We are waiting to hear something. His name is Henry Jacob Braunig.

The food was very good and it came multiple times

Flight from LGW to JFK delayed by 4 hrs No explanation given until the pilot said the delay due to planned maintenance on the aircraft

We arrived late to London, and consequently were 5 min. late to be allowed through security for our next flight. Even though dozens of people missed the same flight, BA did not radio ahead to hold open security for an extra 5-10 min. to allow people to get on the flight. This caused an additional 6 hour delay in London after waiting over an hour in Customer Service to get rebooked. They did not have enough staff on hand to help people in a timely manner. Not at all happy with the BA's customer care or customer service.

All service prior to the flight was terrible: online check-in not working, no customer service tel,, multiple airport scanners not working, A huge mess.

CONSTANT ERROR MESSAGE THAT THE WIFI COULD NOT BE PURCHASED DUE TO INABILITY TO CONNECT PAYMENT SYSTEM VIA SATELLITE. THIS HAPPENED IN BOTH DIRECTIONS. THE MAIN REASON I TRAVEL IN PRIORITY IS TO BE ABLE TO WORK FOR WHICH I NEED ACCESS TO INTERNET. .

They lost my luggage. Lady who was helping with it in Austin was rude. Not very helpful!

Waited 3.25 hours in plane only to have the flight cancelled.

More space, of course. a footrest! more room to walk. Movie selection was awful. Some good documentaries would help if the movies can't be better. The flight itself was great, crew was great.

Better synchronizing the boarding processes. The audio announcements, the personnel and the digital signage were not saying the same thing. All confusion.

Everything you need to know for your flight from London to St. Louis

Information on your arrival and departure airports

St. Louis (STL)

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