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LON - STL

Find cheap flights from London to St. Louis from $357

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 5/15. 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
0 bags
Mon 6/3
Mon 6/10

Search 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
In the last 7 days travelers have searched 43,693,958 times on KAYAK, and here is why:

Save 22% or moreCompare multiple travel sites with one search.

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Filter your dealsChoose cabin class, free Wi-Fi and more.

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Cheap flight deals 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 and deals for you by selecting your travel dates.
Choose your dates
12:30 pm - 11:00 pmLHR-STL
16h 30m1 stop
6:58 pm - 12:10 pmSTL-LHR
11h 12m1 stop
$636Finnair
Find Deal
Mon, Sep 9 - Mon, Sep 23
2:00 pm - 10:34 amLGW-STL
26h 34m1 stop
6:55 pm - 10:00 amSTL-LGW
33h 05m1 stop
Fri, Jun 7 - Sun, Jun 23
7:25 am - 5:11 pmLHR-STL
15h 46m2 stops
11:10 am - 7:15 amSTL-LHR
14h 05m2 stops
$855United Airlines
Find Deal
Mon, Sep 9 - Mon, Sep 23
3:05 pm - 11:53 amLGW-STL
26h 48m1 stop
4:20 pm - 8:10 amSTL-LGW
33h 50m2 stops
$923American Airlines
Find Deal
Wed, May 15 - Sat, May 18
8:30 am - 7:47 pmLHR-STL
17h 17m2 stops
11:09 am - 7:15 amSTL-LHR
14h 06m2 stops
$970United Airlines
Find Deal
Thu, Sep 5 - Thu, Sep 26
7:10 pm - 3:49 pmLCY-STL
26h 39m2 stops
8:25 am - 4:25 pmSTL-LCY
26h 00m2 stops
$1,026Lufthansa
Find Deal
Tue, Sep 10 - Tue, Sep 17
12:15 pm - 7:30 pmLHR-STL
13h 15m1 stop
5:15 am - 7:40 amSTL-LHR
20h 25m1 stop
$1,035American Airlines
Find Deal
Mon, May 27 - Wed, Jun 5
3:35 pm - 9:47 pmLHR-STL
12h 12m1 stop
6:08 pm - 12:15 pmSTL-LHR
12h 07m1 stop
$1,071British Airways
Find Deal
Thu, May 30 - Thu, Jun 6
7:10 pm - 1:30 pmLCY-STL
24h 20m1 stop
8:25 am - 4:25 pmSTL-LCY
26h 00m2 stops
$1,122Lufthansa
Find Deal
Tue, Sep 10 - Tue, Sep 17
7:55 am - 8:55 pmLGW-STL
19h 00m2 stops
12:44 pm - 11:15 amSTL-LGW
16h 31m2 stops
$1,374British Airways
Find Deal
Mon, Jun 3 - Tue, Jun 11

Flights from London to St. Louis - Travel Insights & Trends

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.

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

The average price of all 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 Sundays if you are looking for the best rates. For your return to London, you’ll find the best rates on Wednesdays and the most expensive ones on Saturdays.

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 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 February, where tickets cost $637 on average. On the other hand, the most expensive months are August and July, where the average cost of tickets is $970 and $896 respectively.

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

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for 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 month.
To get a below average price on the flight from London to St. Louis, you should book around 1 day before departure. For the absolute cheapest price, our data suggests you should book 27 days before departure.

Which airlines provide the cheapest flights from London to St. Louis?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
The best deals for a one-way ticket found by KAYAK users over the last 3 days were on WestJet ($871) and Lufthansa ($924). The cheapest round-trip tickets were found on Finnair ($636) and United Airlines ($855).

Good to know

Low season

January

High season

April

Cheapest flight

$357
Best time to beat the crowds with an average 10% drop in price.
Most popular time to fly with an average 5% 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 $357 for a one-way ticket and $636 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.

  • Which is the best airline for flights from London to St. Louis, American Airlines or United Airlines?

    The two airlines most popular with KAYAK users for flights from London to St. Louis are American Airlines and United Airlines. With an average price for the route of $1,158 and an overall rating of 7.3, American Airlines is the most popular choice. United Airlines is also a great choice for the route, with an average price of $1,139 and an overall rating of 7.3.

  • 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.

See more FAQs

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.
See more tips

Top 4 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.
7.3
United AirlinesOverall score based on 11134 reviews
7.7Boarding
7.1Entertainment
8.1Crew
7.2Comfort
6.7Food
Airline reviews

It was fine. Flight was on time and arrived at destination with 15 min to spare.

8.0 ExcellentAnonymous, May 2024MUC - EWR
Read more about United Airlines reviews

It was fine. Flight was on time and arrived at destination with 15 min to spare.

My bag was lost with my medicine and I am very inconvenienced. I don’t know what happened, however I want you to do a better job on getting people’s bag back

I paid $380 for my one-way ticket from California to Minnesota. The fair did not include online check-in. I received instructions from their app to check in at a kiosk. At the kiosk, the boarding pass would not print until an actual person came to verify that I had a personal item and not a carry-on item, On the plane, the person next to me was drunk and allowed to continue to order alcohol. United is garbage I’d rather fly spirit.

The food that was offered based on class level of your ticket was absolutely ridiculous and disgusting. They didn't even hot tea to serve, the food was horrible. On our departure flight I was seated in premium plus economy and considering the cost of the flight the food was literally some of the worst I've ever eaten. On the return flight I sat in economy with extra leg room and was given a thin little throw "blanket" and a flimsy little pillow. The air condition was on artic and the seating arrangement wasn't really worth the money. The seat didn't recline good enough and the foot rest was laughable. Total waste.

The plane was dirty and the in seat air wasn't blowing as planes usually do.

Generally good but there wasn’t any staff available when my luggage didn’t appear at baggage claim in Fresno. It took about half an hour to locate a staff member to open up the locked room where it was being kept.

Generally good but there wasn’t any staff available when my luggage didn’t appear at baggage claim in Fresno. It took about half an hour to locate a staff member to open up the room where it was being kept.

The flight was delayed due to weather issue…WiFi did not work and even though I wanted to pay for WiFi I couldn’t buy it. Overall very disappointing even though I paid and reserved Business class

Do not like the feeling of being in the basic economy. Everyone should feel good no matter what.

All flights were on time and boarding was issue free

Seriously, not displaying departure gate until very last minute is awful. Specially when you have to take an elevator and then transport to go to the sub-terminal. That’s awful in such a busy airport as Heathrow. And I cannot choose seat on this flight because it’s run by British Airways, even entering locator code.

Somehow I got “offloaded” even though I had my boarding pass and was in transit Food is horrible Staff were nice and cheerful No headphones were provided on 11 hours flight

The staff were very helpful with lots of refreshments on offer. The toilets were clean. The seats were comfortable and entertainment was good. No complaints, it was excellent.

The main flight was OK but the second flight was chaotic with delays

amazing! they were so kind and allowed us to sit on empty seats so we could stretch our legs and sleep good. Food is amazing as well plus dessert in the middle of the flight!

All the British airways staff were very helpful and friendly. Every thing was very smooth running from checking in boarding and arriving 40 minutes early. Which is a brilliant start to your holiday.

Overall it was good but not great. The aircraft was an old and seats didn’t recline in business class unless you kept playing around with it.

No nice at all, delayed and I lost the connection over xmas

Food was terrible. Flight attendants OK. Only saw them at food service. Other than that they paid no attention to the passengers at all.

On time flight , great service from crew , comfortable and enjoyable

It was freezing in the airplane. Everyone was wearing everything they had with them. The crew acknowledged it was cold, but did nothing about it

The flight attendants were superb and the service was outstanding. Some passengers with small children were very rude and inconsiderate, kids were constantly crying and some were running around the aisle unsupervised.

Terrible. There was a rattling noise the whole flight. The internet didn't work after I paid. Boarding is very disorganized.

Horrible flight attendant in back of economy that screamed at me, have already reported to United. Horrible food - for Gluten free, why would you assume the person is vegetarian? I was served some kind of horrible curry bean paste and multiple cold rolls and soggy vegetables with no seasoning... um no!

The crew member put her luggage and boxes behind my seat so I was able to recline while the passenger in front of me did for 8 hours. My knees were forced against the seat for hours :(. Dude sitting next to me hasn't showered in weeks so I almost threw up.

Sorry my last review for prg to fra was for this flight. My prg to fra flight was fine but my second flight back to Washington DC was with a slow awful crew who wouldn’t come in a timely manner to take trash and take trash before serving coffee tea and was shoving other people’s bottles of water on me when we were not traveling together

I was at the airport on time , I checked in my luggage . The plane was delayed and the gate was change. The flight board did not give information . I did not get chance to fly. I am going to make a claim for it

Lufthansa was amazing. Definitely upgrade your seat if you can swing it - they take very good care of their passengers. Customs in DC is nothing short of a nightmare though. Stood in line waiting to go back through security for 30 minutes, had to RUN through and across two terminals to make my connection and only had 5 minutes to spare. Terrible. Very very poor coordination by the airport staff and CBP.

I was ver pleased with the service all the way through

I always try to book flights that don’t charge for baggage. Yet I was charged $75 for this flight.

my original flight was cancelled the previous day, and i was rescheduled onto this flight, which left much earlier in the morning, impacting my previous evening and requiring me to get up much earlier in the morning to get to the airport online. This practice happens way way way too much, and it seems on every airline, though AA is probably the worst.

The crew was very attentive and kept busy serving a variety of treats!

Offered vegetable curry when it was actually tofu which I don’t care for.

The flight was good the crew excellent…but take off delayed three hours!!!

Both mine and my husband's chairs were broken. Also it took 2 hours to get our bags after our flight which was wild.

perhaps eye contact with the cabin crew, instead of abruptness and an impatience to serve.

Not enough trash pickups throughout the flight. Everything else was great.

Overall good, the gluten free food is very hit/miss though and you must tell them you have an allergy days in advance.

All was good. The headphones they supply are of poor quality. The food is good but too much dairy.

Seating space was crowded and I am a very small woman.

Book cheap flights from London to St. Louis

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from London to St. Louis found on KAYAK in the last 72 hours.
5/15Wed
1 stop
23h 08mLGW-STL
$357
9/4Wed
1 stop
14h 14mLGW-STL
$378
5/15Wed
1 stopLufthansa
13h 00mLHR-STL
$924
5/15Wed
1 stopBritish Airways
13h 15mLHR-STL
$1,121
5/13Mon
1 stopBritish Airways
12h 36mLHR-STL
$1,174
8/29Thu
1 stopLufthansa
34h 15mLCY-STL
$1,751
8/7Wed
1 stopUnited Airlines
13h 00mLHR-STL
$2,160
8/6Tue
2 stopsUnited Airlines
15h 12mLHR-STL
$2,183
5/15Wed
1 stopAmerican Airlines
19h 00mLHR-STL
$2,614
5/15Wed
1 stopAmerican Airlines
19h 00mLHR-STL
$2,674

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Last minute flights from London to St. Louis

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from London to St. Louis that are departing in the next 10 days.
5/8Wed
multi-stopLufthansa
13h 00mLHR-STL
5/18Sat
multi-stopLufthansa
15h 20mSTL-LHR
$1,468
5/8Wed
multi-stopAustrian Airlines
17h 14mLHR-STL
5/18Sat
multi-stopAustrian Airlines
17h 30mSTL-LHR
$1,470
5/9Thu
multi-stopUnited Airlines
14h 56mLHR-STL
5/16Thu
multi-stopUnited Airlines
18h 25mSTL-LHR
$1,471
5/9Thu
multi-stopAir Canada
17h 35mLHR-STL
5/16Thu
multi-stopAir Canada
13h 30mSTL-LHR
$1,476
5/7Tue
multi-stopAmerican Airlines
12h 12mLHR-STL
5/11Sat
multi-stopAmerican Airlines
25h 10mSTL-LHR
$1,502
5/7Tue
multi-stopFinnair
16h 42mLHR-STL
5/11Sat
multi-stopFinnair
22h 46mSTL-LHR
$1,503
5/9Thu
multi-stopAustrian Airlines
37h 14mLHR-STL
5/18Sat
multi-stopAustrian Airlines
12h 45mSTL-LHR
$1,508
5/9Thu
multi-stopUnited Airlines
14h 56mLHR-STL
5/18Sat
multi-stopUnited Airlines
14h 00mSTL-LHR
$1,509
5/9Thu
multi-stopUnited Airlines
13h 00mLHR-STL
5/18Sat
multi-stopUnited Airlines
13h 45mSTL-LHR
$1,513
5/6Mon
multi-stopBritish Airways
14h 07mLHR-STL
5/12Sun
multi-stopBritish Airways
13h 01mSTL-LHR
$4,684

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Flights to St. Louis

Destination:

St. Louis (STL)United States

Return flight deals:

St. Louis - London

Cabin classes: