LON - STL

£266 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 27/8. 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.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to St. Louis.
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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 return 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 return flight deals from London to St. Louis

Sat, 20 Sep - Wed, 8 Oct
 Logo
14:00 - 13:35LGW-STL
29h 35m2 stops
 Logo
09:15 - 19:40STL-LGW
28h 25m3 stops
Sat, 20 Sep - Wed, 8 Oct
United Airlines Logo
07:45 - 23:44LHR-STL
21h 59m2 stops
United Airlines Logo
06:00 - 06:30STL-LHR
18h 30m2 stops
£635United Airlines
Find Deal
Mon, 28 Jul - Mon, 4 Aug
 Logo
14:00 - 16:31LGW-STL
32h 31m2 stops
 Logo
17:40 - 10:00STL-LGW
34h 20m1 stop
Mon, 8 Sep - Fri, 19 Sep
Lufthansa Logo
09:30 - 19:57LHR-STL
16h 27m1 stop
Lufthansa Logo
13:39 - 09:40STL-LHR
14h 01m1 stop
£687Lufthansa
Find Deal
Thu, 11 Sep - Fri, 19 Sep
Lufthansa Logo
09:30 - 19:57LHR-STL
16h 27m1 stop
Lufthansa Logo
16:32 - 11:35STL-LHR
13h 03m1 stop
£691Lufthansa
Find Deal
Tue, 25 Nov - Mon, 1 Dec
British Airways Logo
13:10 - 20:16LHR-STL
13h 06m1 stop
British Airways Logo
17:57 - 11:40STL-LHR
11h 43m1 stop
£703British Airways
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Wed, 15 Oct - Sun, 19 Oct
Finnair Logo
19:05 - 09:04LHR-STL
43h 59m2 stops
Finnair Logo
18:28 - 21:40STL-LHR
21h 12m2 stops
£809Finnair
Find Deal
Sun, 17 Aug - Sun, 24 Aug
British Airways Logo
16:20 - 20:47LHR-STL
34h 27m2 stops
British Airways Logo
17:32 - 06:25STL-LHR
30h 53m1 stop
£817British Airways
Find Deal
Thu, 16 Oct - Tue, 21 Oct
Virgin Atlantic Logo
07:45 - 20:35LCY-STL
18h 50m2 stops
Virgin Atlantic Logo
11:51 - 08:10STL-LCY
14h 19m2 stops
£857Virgin Atlantic
Find Deal
Thu, 16 Oct - Tue, 21 Oct
Virgin Atlantic Logo
09:20 - 23:39LCY-STL
20h 19m2 stops
Virgin Atlantic Logo
11:51 - 09:30STL-LCY
15h 39m2 stops
£861Virgin Atlantic
Find Deal
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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.

Find cheap flights to St. Louis
Find cheap flights to St. Louis

Planning a trip from London to St. Louis? KAYAK’s data-powered insights will help you find cheap flights. Learn the best time to fly, how early to book your ticket, and other tips to secure great prices.

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.

When flying from London to St. Louis, you should consider leaving on a Wednesday and avoid Thursdays if you are looking for the best rates. For your return to London, you’ll find the best rates on Tuesdays and the most expensive ones on Fridays.

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 £542 (return) on average. On the other hand, the most expensive months are December and August, where the average cost of round-trip tickets is £1,002 and £924 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.


Good to know - Cheap tickets from London to St. Louis

Low seasonJanuary
High seasonJuly
Cheapest flight£266
Best time to beat the crowds (22% less expensive on average)
Most popular time to fly (21% more expensive on average)
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 return price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or returns 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 £363 for a one-way ticket and £722 for a return.

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

    There are 5 airports in London (London City, London Gatwick, London Heathrow, London Luton, and London Stansted.) and only 1 airport in St. Louis (Lambert-St Louis). The cheapest flights are generally found on the London Heathrow Airport to Lambert-St Louis flight route.

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

  • What is the most popular stopover when flying to St. Louis from London?

    Chicago is the most popular stopover city among KAYAK users travelling from London to St. Louis.

  • Which is the best airline for flights from London to St. Louis, KLM or Finnair?

    The two airlines most popular with KAYAK users for flights from London to St. Louis are KLM and Finnair. With an average price for the route of £775 and an overall rating of 7.8, KLM is the most popular choice. Finnair is also a great choice for the route, with an average price of £618 and an overall rating of 7.6.

  • 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 return 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 5 airlines serving 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.
7.6
FinnairOverall score based on 1306 reviews
6.7Food
7.4Comfort
7.6Boarding
6.9Entertainment
8.1Crew
Airline reviews

This was an absolutely exceptional flight. The flight attendants were extremely attentive and very friendly. They seemed to go out of their way to make us comfortable and to make sure that we had everything we needed., We were in business and were very happy with the size and the details for our pods. We would definitely recommend Finnair and will definitely be flying with them again.

10.0 ExcellentAlan, Jul 2025HEL - SEA
Read more Finnair reviews

This was an absolutely exceptional flight. The flight attendants were extremely attentive and very friendly. They seemed to go out of their way to make us comfortable and to make sure that we had everything we needed., We were in business and were very happy with the size and the details for our pods. We would definitely recommend Finnair and will definitely be flying with them again.

We had an excellent trip with Finnair. This was our first time and we’re very pleased. The only issue was with the boarding - it was a little bit confusing and needs a little bit of streamlining.

Crew very lovely. Arrived an hour late due to bad weather. We were given new tickets to an other flight but it could have been organised better, so we did not have to run through the whole airport to.

Flight delayed over an hour. They said they would hold our connection but then did not.

Major problems checking in at Alaska counter. They could not find our booking code because it came from Finnair.

Do not use KAYAK or Finair for future travel. Unless you purchase the tickets directly from the airline, you were going to have a difficult time checking in. Kayak canceled my flights twice and ended up causing great difficulty in me getting back from Europe because they double sold my tickets between American Airlines and Finair. The event caused significant delays and led to me having to rebook my flights.

The staff were all particularly great. The plane was clean and fresh. The bassinet worked great. It was all very nice.

Boarding uncomfortable. Stewardess said I would have to check my carry on as there was no room in the overhead bins. Another passenger helped me find a spot.

Any flight that lands safely is a good flight. However our leg from Helsinki was delayed 1 hour with no explanation. The delay would not allow us to make our connection to Cincinnati. I was informed by American Airlines that our Cincinnati flight was rescheduled for the following day. I immediately made a non refundable hotel reservation in Dallas. Upon exiting the plane at Dallas I was given a hotel voucher. Nice, but I can't get a refund on the hotel I booked. A little communication would have been helpful. Food on Finnair is below quality of Korean Air.

The cabin crew really looked like they wanted to be somewhere else. They weren't really interested in providing an attentive service to full fare paying passengers at all. However the Captiain's in flight announcements were relaxed and very entertaining.

Food was excellent. Service was very good. Staff was very helpful to all passengers.

The crew was excellent as ever on Virgin. The special meal was poor unfortunately. More significantly when we arrived at Manchester Airport there was no air bridge provided and we had to exit the plane down a rickety stair case. This is unacceptable for a transatlantic flight. Whilst I understand that this is the airport’s fault at the end of the day the airline is responsible for our transportation and needs to do something.

Super friendly and helpful staff, from check-in desk to cabin crew.

Following a paid seat upgrade for enhanced comfort, I encountered an unacceptable odor in my assigned area. It took three hours for the crew to relocate me, and the replacement seat was unacceptably close to the lavatory, offering no improvement.

Good overall. Cannot fault the airlines. I have had better entertainment systems before ie ice in Emirates but it was not too bad. Food was decent and staff were friendly.

I did not fly by vergin atlantic from bangalore to vasco da gama

Your flight delayed at Heathrow n I almost missed my mother funeral.you idiots. I had to waste 10 hours in different airports. Thank your stars I'm not suing you.

Miami airport needs more thorough signage. It was a long walk from my transport point to the check in desk,

Flight took off an hour late. Had to stay on the tarmac for half an hour after landing. Both annoying.

We had an unfortunate experience where we had to leave the aircraft after boarding, shortly before the scheduled takeoff time, and re-board. The reason given was that a passenger felt ill and had to cancel their plans and therefor their luggage had to be found and removed.

As always a terrible experience. AA stole a day from my vacation days planned to be spent with my Family. Response: delays related to weather issues.

Even in the premium economy, I found the seats incredibly uncomfortable. I hated that booking through Kayak, it wasn't clear that it was a Level flight, not Iberia. Everything felt cheaply made and not at all worth the airfare we paid.

The flight was over two hours delayed. The aircraft was somewhat dated.

Luggage arrived damaged and protective plastic was lost. I need customer service to contact me or the number for customer service. Thanks.

Provided a good service and I will use it again. Thanks,

Boarding was not well coordinated. I asked twice at the Level check-in area about the MIA flight. At no point did they say the check-in would be at another counter. Fortunately, another passenger was equally confused and got the REAL story from the airport’s info center. Further, my minor child was tagged “SSSS” on their boarding pass. Level should have notified TSA about him being a minor. Instead, the entire family went through the SSSS process, not just our son. When his name was called out at the gate, it was announced in Spanish. No English announcement was made. The food on board was bearable. The crew was adequate, despite not being Level/Iberia crew (Level contracted out our flight to “World2Fly Airlines” - a company I have never heard of!). The onboard entertainment was very limited. They did not even offer a flight tracker option. Nor were music selections offered. Like TAP and Aer Lingus, I will think twice before booking Level ever again.

This ticket was canceled and I did not find out until it was time to check in. I believe the vendor is at fault. Cheap tickets.com I would like to elaborate on the situation to kayak. Can you give me an email address?

You get what you pay for. In general I like the service and flight attendants.

Excellent! Outstanding customer service, the best service I have received. Food was served, dinner, snacks, beverages, crew was there to greet you. 10/10

Charging $300 to be able to pick a seat next to your wife was nothing less than extortion.

Good legroom. Attentive crew. Wine quality poor, you can do better

It was freezing. I asked crew member for a blanket and was told it might be in front of plane but I never got one. I turned off all the vents but still froze.

Great experience. Flight was on time and reached destination on time

I meant this flight was not good, the one from Tirana to Frankfurt was better!

Easy checkin. Things went off without a hitch. The the movie selection for the flight wasn’t great, though.

food, movie entertainment upgraded current, interconnecting flights being on time, we have a 24-hour overlay

Exit row seat that cost extra to book had a bad monitor marked as out of order, so clearly something they should have fixed.

Cheapest airlines I have ever been on. I got downgraded and never got on united. I got rerouted through Vancouver onto jetwesf

Never happened. Flight was delayed. Had to be re rojyed

I was very grateful for Lufthansa's role in organizing mobility support. The touchscreen on my seat was faulty: slow, stained (I couldn't get it clean), and glitchy. This made selecting movies extremely time consuming, and twice I had to start all over from the beginning.

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

Other airlines flying from London to St. Louis

Flights from the other most popular airlines that fly from London to St. Louis according to KAYAK users. Prices are the lowest found on KAYAK over the last 7 days. Price and availability are not guaranteed.

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