STL - LON

£167 Find Cheap Flights from St. Louis to London

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to London departing on 1/2. 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, 0 bags

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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Flight 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

Sun, 14 Dec - Fri, 9 Jan
Multiple Airlines Logo
09:54 - 10:00STL-LGW
18h 06m1 stop
Multiple Airlines Logo
14:00 - 22:33LGW-STL
14h 33m1 stop
£435Multiple Airlines
Find Deal
Mon, 8 Dec - Thu, 8 Jan
Multiple Airlines Logo
15:30 - 10:00STL-LGW
12h 30m1 stop
Multiple Airlines Logo
14:00 - 07:50LGW-STL
23h 50m1 stop
£437Multiple Airlines
Find Deal
Wed, 12 Nov - Wed, 19 Nov
Lufthansa Logo
15:50 - 09:45STL-LHR
11h 55m1 stop
Lufthansa Logo
06:30 - 13:55LHR-STL
13h 25m1 stop
£454Lufthansa
Find Deal
Wed, 26 Nov - Wed, 3 Dec
Lufthansa Logo
18:43 - 15:50STL-LHR
15h 07m2 stops
Lufthansa Logo
06:30 - 13:55LHR-STL
13h 25m1 stop
£469Lufthansa
Find Deal
Tue, 11 Nov - Tue, 18 Nov
United Airlines Logo
07:00 - 07:10STL-LHR
18h 10m2 stops
United Airlines Logo
06:50 - 15:47LHR-STL
14h 57m2 stops
£477United Airlines
Find Deal
Wed, 19 Nov - Fri, 5 Dec
United Airlines Logo
11:37 - 06:20STL-LHR
12h 43m1 stop
United Airlines Logo
06:30 - 13:55LHR-STL
13h 25m1 stop
£478United Airlines
Find Deal
Wed, 7 Jan - Wed, 14 Jan
KLM Logo
11:23 - 07:05STL-LHR
13h 42m1 stop
KLM Logo
06:30 - 16:39LHR-STL
16h 09m2 stops
£484KLM
Find Deal
Wed, 7 Jan - Wed, 14 Jan
British Airways Logo
14:54 - 09:15STL-LHR
12h 21m1 stop
British Airways Logo
14:45 - 23:12LHR-STL
14h 27m1 stop
£501British Airways
Find Deal
Wed, 22 Apr - Tue, 5 May
British Airways Logo
22:00 - 12:05STL-LHR
8h 05mdirect
British Airways Logo
16:25 - 19:30LHR-STL
9h 05mdirect
£506British Airways
Find Deal
Mon, 12 Jan - Sun, 18 Jan
KLM Logo
12:00 - 07:15STL-LCY
13h 15m2 stops
KLM Logo
13:45 - 23:40LCY-STL
15h 55m2 stops
£764KLM
Find Deal

Everything you should know

Top airlines
Lufthansa
Cheapest • from £454 (return)
KLM
Best reviews • 7.7 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Top routes
STL-LHR
Cheapest
STL-LHR
Most popular
Insights
Insights
Insights
Insights
When to book
4 weeks
in advance
Our data shows that travellers who book at least 4 weeks in advance save around 36% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
October
Cheapest • 20% price drop
March
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest return fare
£435
Multiple Airlines
Sun 14/12Fri 9/1
STL - LGW • 1 stop
Cheapest direct flights
£502
British Airways
Wed 22/4Wed 6/5
STL - LHR • Direct
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KAYAK searches hundreds of sites at once to find you the best travel deals.
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Booking Insights

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 is the cheapest St. Louis to London flight route?

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest return flight from St. Louis to London costs £440 on the route between St. Louis (STL) and London Heathrow Airport (LHR). It is also the most popular route.

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, Thursday is the cheapest day to fly on average and Monday is the most expensive. Flying from London back to St. Louis, the best deals are generally found on Sunday, 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 October, where tickets cost £562 (return) on average. On the other hand, the most expensive months are June and December, where the average cost of round-trip tickets is £1,012 and £927 respectively.

Can I save money by flying with a stopover from St. Louis to London?

The average return price for all direct flights, flights with one stopover, and flights with two stopovers for the route found by users searching on KAYAK in the last 2 weeks.

Yes, flying with a stopover may cost you more time, but you can also save money on the route, with a 1 stop stopover the cheapest option at £555 on average.

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, which saves you about 36% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 5 weeks before departure.

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

Low seasonJanuary
Cheapest flight£167
Best time to beat the crowds (8% less expensive on average)
Most popular time to fly and prices are also 13% 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 £167 for a one-way ticket and £435 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?

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

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

    Star Alliance, oneworld, and SkyTeam are the airline alliances operating flights between St. Louis and London, with Star Alliance 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 £897 and an overall rating of 7.7, KLM is the most popular choice. Virgin Atlantic is also a great choice for the route, with an average price of £817 and an overall rating of 7.5.

  • 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

  • Looking for a cheap flight from London to St. Louis? 25% of our users found flights on this route for £452 or less round-trip.
  • 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.

Reviews of the top 3 airlines flying 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.
7.7
KLMOverall score based on 1406 reviews
7.8Boarding
7.7Comfort
8.4Crew
7.3Food
7.1Entertainment
Airline reviews

At the airport, terrible, I do not want to even remember it. It was too humiliating for a business class passenger.

2.0 MediocreElizabeth, Oct 2025CDG - AMS
Read more KLM reviews

At the airport, terrible, I do not want to even remember it. It was too humiliating for a business class passenger.

They forgot to serve food and the crew was very unfriendly. Never experienced such a bad KLM flight. Usually fly from Toronto. New York was different.

The immigration hall in Amsterdam was understaffed, so passport checking was slower than it should be for a major airport. They need to get the automatic readers up and running for non EU passport holders. Waiting in line after a long flight feels a bit abusive.

Over 1 Hr delay. No APU so no AC on ground. Plane was hot during boarding and then they closed the doors over 20 minutes before engine start so interior of plane was steamy hot and stuffy. Could have been helped by opening doors until ready to depart.

Short flight so it was okay. Nice crew, all very pleasant and professional. We were near the back in row 27 so just as we got our drinks, we started our descent so had to drink very quickly!

KLM remains a quality flag carrier airline which maintains its standards whilst all their competitors are lowering theirs.

The baggage drop-off in Stuttgart is bad: after online check-in you cannot use the automated baggage drop off as indicated on the website. You can use the terminals but have to cue to 1 of three open and slowly working counters to drop the bags. took about 45 minutes wait time.

Our first flight was delayed so we missed our connecting flight. However it was easy to book a later flight on their app.

My flight was delayed by 6 hours then I missed BOTH of my connecting flights, I then had to stay in the AIRPORT at JFK because soooooo many people also suffered from missing flights and there was no hotels available. I would like to be compensated for this experience! I had to stay in the airport for over 16 hours!

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

Great staff great experience, made a 2 hour delay very bearable

Great staff, great experience, made a 2 hour delay very bearable

Food was the worst I’ve had on a VA flight. Normally it’s a lot better

I was my pleasure to fly virgin on my birthday for my first solo trip ever 🫶🏼

These are one of the older seat arrangements facing away from the windows! Not particularly convenient sets. No storage spaces. NO COAT HANGING HOOKS. Inconvenient business class seat compared to any other airlines of similar class. Staff are excellent! Extremely professional, friendly. Food is good too.

Overall, flight was excellent but check in was very slow for Premium Economy. Economy queue was shorter but we weren't allowed to use it.

The staff was not very polite but the flight was very very nice and comfortable and the entertainment was great

Great crew - old style upper class seats on the older fleet now feels dated

Premium economy more comfortable than economy, but not by much. Did was awful, do not try the omelette. Flight crew were helpful. Flight was delayed by over an hour. Overall but bad, arrived safely and thank God.

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

Flying on the Boeing 787 from Seattle to London was everything that I expected. Every thing was great.

Seat pitch is not enough to eat comfortably. When seat in front is reclined, your screen comes closer to your face. Ryanair seats are actually more comfortable.

The leg from Portland to Heathrow was great for a business class ticket. The BA leg from Heathrow to Lisbon was terrible. Basically coach seating with an empty seat between you and next passenger. Absolutely no leg room. Should not have been charged for business class and it was a 3 hour flight.

The flat beds. Other than that, the place was not clean.

Moved me away from my family and refused to fix it.

I have always been pleased with their service. Would not change a thing

Seating and food was the worst we have experienced in 35 years of traveling for both personal and busines .

Economy seats felt more cramped than other flights we have taken.7 hr, painful sitting hours 6 and 7. Web site difficult to deal with. Originally put in for 1 special meal due to type 2. Meal was awful. Tried to change selection to standard for return flight, on app and website, unable to complete that action.

I was sleeping during dinner service, no one bothered to offer meal later, I remained hungry….until I got a morning sandwich!

Need to offer Better food from LAX to London Service from London to Delhi very delayed after take off.

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

Information on your arrival and departure airports

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