LON - STL

$477 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 1/19. 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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Flight 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

Fri, Feb 6 - Fri, Feb 20
Multiple Airlines Logo
2:00 pm - 10:02 amLGW-STL
26h 02m2 stops
Multiple Airlines Logo
8:45 am - 10:00 amSTL-LGW
19h 15m1 stop
$715Multiple Airlines
Find Deal
Mon, Nov 17 - Mon, Dec 1
Virgin Atlantic Logo
8:55 am - 4:07 pmLHR-STL
13h 12m1 stop
Virgin Atlantic Logo
1:55 pm - 6:25 amSTL-LHR
10h 30m1 stop
$718Virgin Atlantic
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Mon, Nov 17 - Mon, Dec 1
British Airways Logo
11:45 am - 6:37 pmLHR-STL
12h 52m1 stop
British Airways Logo
3:43 pm - 8:15 amSTL-LHR
10h 32m1 stop
$726British Airways
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Tue, Dec 2 - Tue, Dec 9
British Airways Logo
8:20 am - 4:27 pmLHR-STL
14h 07m1 stop
British Airways Logo
4:07 pm - 8:15 amSTL-LHR
10h 08m1 stop
$727British Airways
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Mon, Nov 17 - Mon, Dec 1
Delta Logo
11:45 am - 11:44 pmLHR-STL
17h 59m2 stops
Delta Logo
7:02 pm - 11:40 amSTL-LHR
10h 38m1 stop
$733Delta
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Thu, Mar 5 - Mon, Mar 9
American Airlines Logo
12:30 pm - 12:11 pmLGW-STL
29h 41m2 stops
American Airlines Logo
7:05 pm - 7:30 amSTL-LGW
31h 25m2 stops
$734American Airlines
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Mon, Nov 17 - Mon, Dec 1
Delta Logo
6:30 am - 5:09 pmLHR-STL
16h 39m2 stops
Delta Logo
2:36 pm - 10:30 amSTL-LHR
13h 54m2 stops
$748Delta
Find Deal
Thu, Mar 5 - Mon, Mar 9
American Airlines Logo
9:55 am - 5:13 pmLHR-STL
13h 18m1 stop
American Airlines Logo
4:43 pm - 11:35 amSTL-LHR
13h 52m1 stop
$776American Airlines
Find Deal
Tue, Jan 13 - Fri, Jan 23
KLM Logo
11:45 am - 8:39 pmLHR-STL
14h 54m2 stops
KLM Logo
11:51 am - 6:50 amSTL-LHR
12h 59m2 stops
$781KLM
Find Deal
Thu, Mar 5 - Mon, Mar 9
KLM Logo
11:45 am - 8:39 pmLHR-STL
14h 54m2 stops
KLM Logo
5:45 pm - 8:45 amSTL-LHR
10h 00m1 stop
$835KLM
Find Deal

Everything you should know

Top airlines
Virgin Atlantic
Cheapest • from $718 (round-trip)
British Airways
Best reviews • 6.7 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
4 weeks
in advance
Our data shows that travelers who book at least 4 weeks in advance save around 34% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
March
Cheapest • 25% price drop
July
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest round-trip
$715
Typical prices: $962-$1,091
Multiple Airlines
Fri 2/6Fri 2/20
LGW - STL • 2 stops
Cheapest one-way
$477
Typical prices: $858-$1,097
Multiple Airlines
Mon 1/19
LHR - STL • 2 stops
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to St. Louis!
Booking Insights

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?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from London to St. Louis departing in February.

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 Tuesday, and avoid Wednesdays 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 July, where the average cost of round-trip tickets is $1,424 and $1,175 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, which saves you about 34% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 4 weeks before departure.

Find deals

Good to know

Low seasonJanuary
Cheapest flight$477
Best time to beat the crowds with an average 24% drop in price.
Most popular time to fly with an average 18% increase in price.
Flight from London Heathrow 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 $477 for a one-way ticket and $715 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?

    The Boeing 787-8 Dreamliner is the aircraft model that flies most regularly on the London to St. Louis flight route.

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

    Star Alliance, and oneworld 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.
6.7
British AirwaysOverall score based on 7461 reviews
6.9Boarding
6.7Comfort
6.4Entertainment
7.6Crew
6.3Food
Airline reviews

One of the worst experience given the middle seat even asked for the change no one honored,boarded at the end and overall one of the worst experience

2.0 MediocreSenthil, Oct 2025LHR - CLT
Read more British Airways reviews

One of the worst experience given the middle seat even asked for the change no one honored,boarded at the end and overall one of the worst experience

It was good although our flight to the UK was cancelled and rescheduled for two days later. This was after we were already seated on the plane. We missed the first leg of our trip. BA did put us up at a hotel and paid for our meals but we lost our hotel costs in Glasgow.

The crew was very nice and pleasant. We were very reluctant to book our flight with British Airlines because we had bad experience with their flight attendants on the previous trips, they were rude and not helpful.

I am a 25+ years American Airlines member. British Airways is simply above and beyond in every customer satisfaction category.

The seat pads are past there sell by date now and are uncomfotable. Also, with screens in the back of the seat, the seats shouldnt be able to recline as this puts rhe screen in your face.

1. The website didn’t allow me to checkin from London as I have Bangladesh passport with US permanent resident card. This pushed me to sit with my wife in the middle of two aisle seats, terrible experience! 2. BA should allow within 24 hours to checkin with other passport holders to choose better seats. A 2nd verification of travel documents can be done at the desk about immigration status. 3. Food options were poor for vegetarian passengers, try to introduce healthy options avoiding carb-dense food ingredients.

Cabin crew lovely and accommodating and I'll always fly BA in the future

It was perfect. The service was exceptional. I would never want to cross the Atlantic in anyone else's sardine tins.

As I have said it sucked, the ticket counter to have to find and pay for another airline to get home. Now I understand this happened over the weekend but they should have someone there to talk to us instead of throwing the regular crew under the bus.

Everything excellent except for bag drop off. We started at the D area and that was so slow that it was eventually closed just as we were about to go to a station. We then went to F. We got one suitcase checked and then the screen showed that the station was no longer operable. There were long lines everywhere so we had to ask if we could butt in to the next station to finish. Again, this was the only incident, otherwise it was an excellent flying experience

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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