STL - LON

£452 Find Cheap Flights from St. Louis to London

This is the cheapest return flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to London departing on 19/8. 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 London

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

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

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from St. Louis to London 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 St. Louis to London

Tue, 19 Aug - Wed, 27 Aug
Delta Logo
10:45 - 10:00STL-LGW
17h 15m2 stops
Delta Logo
12:00 - 23:23LGW-STL
17h 23m2 stops
£452Delta
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Tue, 19 Aug - Wed, 27 Aug
United Airlines Logo
13:30 - 10:00STL-LHR
14h 30m1 stop
United Airlines Logo
06:30 - 13:30LHR-STL
13h 00m1 stop
£459United Airlines
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Tue, 19 Aug - Thu, 28 Aug
British Airways Logo
16:19 - 09:05STL-LHR
10h 46m1 stop
British Airways Logo
14:25 - 20:18LHR-STL
11h 53m1 stop
£460British Airways
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Sun, 21 Sep - Wed, 1 Oct
Iberia Logo
16:02 - 10:50STL-LHR
12h 48m1 stop
Iberia Logo
06:15 - 21:53LHR-STL
21h 38m2 stops
£464Iberia
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Tue, 9 Sep - Tue, 23 Sep
Iberia Logo
09:56 - 07:20STL-LHR
15h 24m1 stop
Iberia Logo
14:25 - 20:32LHR-STL
12h 07m1 stop
£475Iberia
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Wed, 30 Jul - Wed, 13 Aug
British Airways Logo
12:27 - 06:25STL-LHR
11h 58m1 stop
British Airways Logo
10:30 - 18:30LHR-STL
14h 00m1 stop
£481British Airways
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Tue, 8 Jul - Tue, 29 Jul
KLM Logo
10:46 - 06:45STL-LHR
13h 59m1 stop
KLM Logo
12:25 - 23:20LHR-STL
16h 55m1 stop
£523KLM
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Tue, 15 Jul - Tue, 22 Jul
KLM Logo
10:46 - 06:45STL-LHR
13h 59m1 stop
KLM Logo
11:45 - 20:36LHR-STL
14h 51m1 stop
£524KLM
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Tue, 8 Jul - Tue, 29 Jul
Virgin Atlantic Logo
10:46 - 06:45STL-LHR
13h 59m2 stops
Virgin Atlantic Logo
12:25 - 23:20LHR-STL
16h 55m1 stop
£527Virgin Atlantic
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Mon, 21 Jul - Wed, 6 Aug
Virgin Atlantic Logo
15:41 - 11:25STL-LHR
13h 44m2 stops
Virgin Atlantic Logo
10:55 - 20:36LHR-STL
15h 41m2 stops
£542Virgin Atlantic
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KAYAK's insights & trends for St. Louis to London flights

Get data-powered insights and trends into flights from St. Louis to London 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 St. Louis to London?

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

For St. Louis to London, Tuesday is the cheapest day to fly on average and Friday is the most expensive. Flying from London back to St. Louis, the best deals are generally found on Wednesday, with Thursday being the most expensive.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from St. Louis to London, 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 St. Louis to London is April, where tickets cost £560 (return) on average. On the other hand, the most expensive months are June and December, where the average cost of round-trip tickets is £969 and £943 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from St. Louis to London, 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 St. Louis to London, you should book around 4 weeks before departure. For the absolute cheapest price, our data suggests you should book 9 weeks before departure.


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

Low seasonFebruary
High seasonMarch
Cheapest flight£146
Best time to beat the crowds (10% less expensive on average)
Most popular time to fly and prices are also 15% lower on average.
Flight from St. Louis to London Gatwick Airport

When to book flights from St. Louis to London

Are your dates flexible? Find out the best times to travel from St. Louis to London 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 St. Louis to London

  • Are there airport hotels at Lambert St Louis?

    There are many hotels to choose from near Lambert St Louis. Choose a luxury stay at the Hilton Hotel, offering a pool, dining and airport shuttle service. The closest hotel to the airport is Drury Inn and Suites, only a 2min drive away.

  • What special assistance is available at Lambert St Louis?

    Wheelchair access is available at each entrance, and inside the terminal, you will find accessible restrooms, low-level ATMs for wheelchair users and elevators. There is an area for service animals, and Braille text is used on signage throughout. If you require assistance boarding the plane, we recommend contacting your airline at least 48h prior to departure to book a skycap.

  • Which London airport is closest to Central London?

    London City and London Heathrow are the most centrally-located London airports. You can get from Heathrow to the city centre on the Heathrow Express in around 20min with services running roughly every 15min. If you're travelling from London City Airport, you can take the Docklands Light Railway (DLR) from the airport station to Canning Town, where you can change to a London Underground or bus service to your final destination. The journey time should take on average around 40min - 1h.

  • What facilities are offered at St Louis Airport?

    Services available at St Louis Airport range from banking and currency exchange to luggage trolley rental. You can access Wi-Fi for free for 60min, with a small fee applicable for longer use. For anyone wishing to partake in prayer or other religious obligations, St Louis Interfaith Chapel is located on site. Shoe-shining facilities are available in each terminal, and help location points allow tourists to seek advice or assistance when navigating the airport. You can choose from several restaurants to eat at and newsagents and gift shops to browse whilst you wait for boarding to start.

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

    In the last 3 days, the lowest price for a flight from St. Louis to London was £199 for a one-way ticket and £614 for a return.

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

    St. Louis is served by only 1 airport and there are 3 airports in London. You will leave St. Louis from Lambert-St Louis and you will be arriving in London at one of these airports: London Gatwick, London Heathrow, or London Stansted.

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

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

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

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

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

    The two airlines most popular with KAYAK users for flights from St. Louis to London are KLM and Virgin Atlantic. With an average price for the route of £870 and an overall rating of 7.8, KLM is the most popular choice. Virgin Atlantic is also a great choice for the route, with an average price of £829 and an overall rating of 7.4.

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

    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 St. Louis to London.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London from St. Louis 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 St. Louis to London?

    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 London with an airline and back to St. Louis with another airline.

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

    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 London from St. Louis 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 St. Louis to London

  • There are many transportation options to travel to St Lambert Louis Airport (STL) from St Louis. The Metrolink is an affordable choice taking around 30min to arrive at the airport. Alternatively, the bus journey is about 55min inclusive of one change, and driving by car or taxi takes about 18min.
  • If you're travelling on business, St Louis has a choice of lounges from which you can work. Wingtips Lounge is located in Terminal 2 and offers great accessibility with entry via membership and single visit passes. Enjoy a seasonal-inspired menu whilst you utilise the fast Wi-Fi and benefit from air conditioning. The lounge is available to use for a maximum of 4h.
  • Lambert St Louis has seven car parks, each within walking distance of the airport, with a free shuttle service available. Long-term parking is also available, although we recommend booking in advance to save time before your flight. Short-term parking is perfect if you're being dropped off at the airport, with both hourly and daily rates available.
  • Lambert St Louis has two terminals. Terminal 1 has four concourses from A to D, serving domestic flights. Flights from Lambert St Louis to London will depart from Terminal 2, which caters for all international flights and is located on the southern end of the complex. You can fly to one of three London airports: Heathrow (LHR), Gatwick (LGW) and London City (LCY).
  • If you're travelling with the family, make the most of Lambert St Louis' Play Port – a transport-themed play exhibit. The exhibit offers both fun and education with features such as a child-size plane and air control tower. Baby-changing facilities are available throughout the airport, along with lactation suites for breastfeeding mothers.

Top 3 airlines serving from St. Louis to London

 
See real verified KAYAK customer reviews for airlines flying from St. Louis to London. 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 St. Louis to London? 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.
7.8
KLMOverall score based on 1358 reviews
7.2Food
7.8Boarding
7.7Comfort
7.1Entertainment
8.4Crew
Airline reviews

Klm start boarding while somw air issue in the plan

8.0 ExcellentA, Jun 2025AMS - YYZ
Read more KLM reviews

Klm start boarding while somw air issue in the plan

The service was great. However the lounge only gets passing grade

I appreciate that KLM was proactive in informing me of the 2 hour delay which enabled me to replan my travel. It was a bit stressful not knowing whether my connection from Montreal to Ottawa was happening. But the ground and air crew did a good job at comforting and assuring me.

Cabin crew professional, polite and friendly, boarding was seemless, but come on KLM surely you can do better than a pack of cheesy biscuits as an inflight snack

Cabin crew were excellent, very proffesional, polite and friendly, in flight snack was underwhelming, a packet of cheese biscuits, im sure KLM could run to a sandwich!

Legroom not all it could be, especially when the seat in front is reclined. Otherwise it was good, food and beverage were nice.

This portion of the flight was through Indigo. A local carrier. So all economy seating. No real service some refreshments for purchase standard economy stuff.

You should not have to pay for WiFi in business class

Overall very positive. Boarding was quick and organized. Cabin was clean and seats were reasonably comfortable. Cabin crew was excellent and the meals provided were also of good quality

This fight left ahead of time which meant it arrived early which was great. Staff were very professional, but as with all these Short hop Flights the food was a disappointing snack There was no entertainment on this flight, but I did not expect any

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.

We’ve used VA before many times the experience is always been good they have lovely staff and the food is always delicious.

Everything about the flight was amazing from check in to boarding entertainment was okay food we didn’t try.

The payment system was not working so was unable to connect wifi the entire flight

everything to do with KAYAK was terrible. Your customer facing departments are utterly useless, timewasting and unhelpful.

I ordered short ribs for main course. It tasted sweet, really sweet. Horrible.

The screen didn’t work and I didn’t get the seat upgrade I paid $300 for. They were no help with that,

Paid $180 for seat selection, and selection essnt honored. Have to call for a refund.

My flights were great and the crew on them was lovely especially the London to Barcelona flight as Al & AJ were so amazingly nice. I wish they would be my crew always as they have the best customer service. Sadly both flights were delayed the first one from Vegas was because they clearly loaded the cargo wrong the plane was off balance making us 2 hours late. This made me miss my connection and sadly it was challenging rebooking while I was on the flight. I will never use Kayak again as there was no customer service number or live chat and you rebooked me on a flight 2 days later. I had my mom call BA to change it which she did after spending an hour on hold. This should not be so difficult. My second flight was an hour delayed due to not being able to disconnect the bridge from the plane but I did finally make it home.

The delay was not communicated via text and the person who helped with check in also didn’t inform me about the delay. I ended up missing my connection and it was a waste of 5 hours. The crew didn’t mention there would be someone at the gate informing of if I would be rebooked and there was no signage. Overall a very poor experience. The British Airways app was also very buggy, and didn’t work. I will avoid flying with British Airways when possible.

A little better than outward journey but mild chaos at the boarding gate because some people with boarding cards from connecting flights had cards which weren't recognised

The BA business class cabin is excellent,very comfortable for sleeping but the service could be improved.

Surly rude flight attendants. I ordered the chicken and was given a vegetarian meal with no explanation and no opportunity to change it. I tried to order another beverage and was told by the young humorless flight attendant to “wait”. And she never came back. The seats were very uncomfortable and cramped. The last time I flew British Airways was many years ago but I remember it was amazing and the crew were very charming. This was a terrible disappointment given the cost of the flight.

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

Information on your arrival and departure airports

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