$359 Find Cheap Flights from the United Kingdom 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 to St. Louis departing on 3/12. 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 St. Louis

 
These are the airlines KAYAK users have selected most often from within our search results for flights 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 for flights to St. Louis, as well as popular online travel agencies
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41 299 237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$591
Multiple Airlines
Mon 3/9Mon 3/23
LGW - STL • 1 stop
Cheapest non-stop
$731
British Airways
Wed 4/22Wed 4/29
LHR - STL • Non-stop
Our travelers' advice
AI-powered summary based on content written by travel experts. AI can make mistakes.
Finnair’s Economy Comfort offers more legroom.
BA’s Euro Traveller includes a cabin bag, no fees.
Expert advice
Expert advice
Expert advice
Expert advice
Top routes
LGW
-
STL
Cheapest
LHR
-
STL
Most popular
Insights
Insights
Insights
Insights
When to travel
March
Cheapest • 29% price drop
July
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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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!
Flight Deals
Booking Insights
Expert advice
Flight Deals

Cheap Flights from the United Kingdom to St. Louis

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from the United Kingdom 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 the United Kingdom to St. Louis

Mon, Mar 9 - Mon, Mar 23
Multiple Airlines Logo
2:00 pm - 11:19 pm
LGW
-
STL
14h 19m
1 stop
Multiple Airlines Logo
12:16 pm - 10:00 am
STL
-
LGW
40h 44m
2 stops
$591Multiple Airlines
Mon, Mar 9 - Mon, Mar 23
Multiple Airlines Logo
2:00 pm - 11:19 pm
LGW
-
STL
14h 19m
1 stop
Multiple Airlines Logo
7:47 am - 10:00 am
STL
-
LGW
21h 13m
1 stop
$609Multiple Airlines
Mon, Mar 9 - Mon, Mar 23
Multiple Airlines Logo
2:00 pm - 7:11 pm
LGW
-
STL
34h 11m
2 stops
Multiple Airlines Logo
7:47 am - 10:00 am
STL
-
LGW
21h 13m
1 stop
$616Multiple Airlines
Wed, Apr 22 - Wed, Apr 29
British Airways Logo
4:25 pm - 7:30 pm
LHR
-
STL
9h 05mnonstop
British Airways Logo
8:03 pm - 12:15 pm
STL
-
LHR
10h 12m
1 stop
$731British Airways
Wed, Apr 22 - Wed, Apr 29
Finnair Logo
7:30 am - 10:17 pm
LHR
-
STL
20h 47m
2 stops
Finnair Logo
5:21 pm - 12:15 pm
STL
-
LHR
12h 54m
1 stop
$734Finnair
Wed, Apr 22 - Wed, Apr 29
Finnair Logo
7:30 am - 10:17 pm
LHR
-
STL
20h 47m
2 stops
Finnair Logo
5:21 pm - 3:10 pm
STL
-
LHR
39h 49m
2 stops
$745Finnair
Thu, Mar 5 - Sun, Mar 15
American Airlines Logo
12:30 pm - 8:35 am
LGW
-
STL
26h 05m
2 stops
American Airlines Logo
9:15 am - 9:00 am
STL
-
LGW
18h 45m
2 stops
$867American Airlines
Tue, May 5 - Tue, May 19
British Airways Logo
8:25 pm - 7:31 pm
LCY
-
STL
29h 06m
2 stops
British Airways Logo
8:03 pm - 4:30 pm
STL
-
LCY
14h 27m
2 stops
$868British Airways
Sat, Apr 18 - Wed, Apr 22
United Airlines Logo
5:55 am - 7:31 pm
BHX
-
STL
19h 36m
2 stops
United Airlines Logo
9:10 am - 9:40 am
STL
-
BHX
18h 30m
2 stops
$1,271United Airlines
Sat, Apr 18 - Wed, Apr 22
United Airlines Logo
5:55 am - 8:54 pm
BHX
-
STL
20h 59m
2 stops
United Airlines Logo
3:30 pm - 5:30 pm
STL
-
BHX
20h 00m
1 stop
$1,273United Airlines
Booking Insights

KAYAK's insights & trends for flights to St. Louis

Get data-powered insights and trends for flights to St. Louis to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest flight to St. Louis?

These are the best round-trip prices found by users searching on KAYAK in the last 72 hours.

If traveling to St. Louis, the cheapest city to fly from in the last 3 days was London, with flights as low as $359 one-way and $591 round-trip. Flights from London are the most searched and start at $731 for a return trip.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights 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 to St. Louis is December, where tickets cost $981 on average for one-way flights. On the other hand, the most expensive months are August and July, where the average cost of tickets from the United Kingdom is $1,460 and $1,436 respectively. For return trips, the best month to travel is March with an average price of $695.

What is a good deal for flights to St. Louis?

If you’re looking for cheap airfare to St. Louis, 25% of our users found tickets to St. Louis for the following prices or less: From London Heathrow Airport $446 one-way - $803 round-trip.

How far in advance should I book a flight 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 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, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 89 days before departure.

Expert advice

Expert advice for your flight to St. Louis

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Gabriel Leigh

Gabriel Leigh

Expert on Finnair

Gabriel is a writer and video creator. As senior content producer for Flightradar24 and Monocle’s transport correspondent, he keeps a close eye on aviation in particular. He has also written travel articles for the likes of The New York Times. Born in New York but raised around the world, he now lives in Sweden. He’s been to 75 countries, flying 2.3 million miles on 113 airlines and through 234 airports in the process.

Marisa Garcia

Marisa Garcia

Expert on Iberia

Marisa knows planes inside and out, spending 16 years working on aircraft in hangars at airports around the world. She is an aviation industry expert, specialized in airline interiors and regulations. Ten years ago, she pivoted to journalism. She shares her insights in leading aviation, travel, and business publications and on her site FlightChic.

Jessica Macdonald

Jessica Macdonald

Expert on Lufthansa

Currently based in Scotland after living in South Africa and the United States, Jessica has been writing travel and aviation content for more than 10 years. She regularly contributes to Travel + Leisure and TripSavvy, and has had work published by Condé Nast Traveller and The Independent. She has traveled to more than 50 countries across six continents.

Laura Ratliff

Laura Ratliff

Expert on Virgin Atlantic

Laura Ratliff is a New York-based writer and editor. She lives in downtown Brooklyn with her husband and their beloved dogs. Originally from Texas, she now considers New York City her home. She typically spends more than 200,000 miles on a plane each year and stays in plenty of hotels.

Duncan Madden

Duncan Madden

Expert on British Airways

Duncan is a freelance travel writer, copywriter and book author in constant search of travel stories and the perpetual sensation of being on holiday. He’s never happier than when on a dusty trail in search of empty waves or ducking under the piste tape in search of snowbound solitude. British born, living in Germany, but happiest heading for the horizon. His first book, Found in Translation, explores the etymologies and stories of country names around the world and is out now.

Stefanie Waldek

Stefanie Waldek

Expert on United Airlines

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Good to know

Low seasonJanuary
Cheapest flight$359
Best time to beat the crowds with an average 9% drop in price.
Most popular time to fly with an average 15% increase in price.
Flight from London Gatwick Airport to St. Louis

FAQs - booking St. Louis flights

  • What is the cheapest flight to St. Louis?

    If traveling to St. Louis, the cheapest city to fly from in the last 3 days was London, with flights as low as $359 one-way and $591 round-trip. Flights from London are the most searched and start at $731 for a return trip.

  • How far is Lambert-St Louis Airport from central St. Louis?

    Lambert-St Louis Airport is 13 miles from the center of St. Louis.

  • What is the name of St. Louis’s airport?

    St. Louis is served by Lambert-St Louis Airport, also commonly referred to as Lambert Field, Lambert-St Louis, St. Louis Lambert, or St. Louis Lambert Intl. The airport code is STL.

  • How much is a flight to St. Louis?

    On average, a flight to St. Louis costs $725. The cheapest price found on KAYAK in the last 2 weeks cost $438 and departed from London Heathrow Airport.

  • What is the cheapest day to fly to St. Louis?

    Based on KAYAK data, the cheapest day to fly to St. Louis is Sunday where tickets can be as cheap as $874. On the other hand, the most expensive day to fly is Sunday, where prices are $874 on average.

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

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to 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 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 with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight 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 up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • What is the cheapest time of day to fly to St. Louis?

    The cheapest time of day to fly to St. Louis is generally in the evening, when flights cost $874 on average. The most expensive time of day to fly to St. Louis is generally in the evening, which is peak travel time and where the average cost of a ticket is $874.

  • How many direct flights to St. Louis are there each week?

    Each week there are around 2,298 direct flights from within United Kingdom to St. Louis. The most common day for departures is Thursday, with 15% of flights taking off on this day.

Top tips for finding cheap flights to St. Louis

  • Looking for a cheap flight? 25% of our users found flights on this route for $446 or less one-way and $803 or less round-trip.
  • Enter your preferred departure airport and travel dates into the search form above to unlock the latest St. Louis flight deals.

Reviews of the top 3 airlines serving from the United Kingdom to St. Louis

 
See real verified KAYAK customer reviews for airlines flying to St. Louis. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline from the United Kingdom to St. Louis. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with 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.
7.4
United AirlinesOverall score based on 9289 reviews
7.3Comfort
8.1Crew
6.6Food
7.7Boarding
7.1Entertainment
Airline reviews

Very old flight - time to retire it for newer airplanes

10.0 ExcellentSrinivas, Feb 2026
BOS - IAH
Read more United Airlines reviews

Very old flight - time to retire it for newer airplanes

2+ hours delayed Outlet in row 12 did not work Tv monitors did not work Lights kept off the entire flight for at 5pm-7pm flight

No real complaints. The in flight food was much better than I expected. The in flight entertainment was excellent.

From pre boarding to flight attendant, crew and baggage handler, excellent. Didn’t lost my luggage like West jet.

Very disappointing given gate agent behavior. Filed a formal complaint with United.

Do not like the size of the overhead bin. I think staff should monitor the size of suitcases that are being carried on by passengers to ensure they meet the size requirement.

Crew was great (professional, attentive, prompt). Snacks for 4 hrs flight is deplorable.

Flight delayed. WiFi connectivity very poor if not existant. Last minute arrival forced me to run to catch my connection.

Both of my flights arrived early and check in process was smooth

Terrible. No customer service, no food, no drinks on a 6 hour premier economy booking.

Boarding delayed 20 minutes for no reason, no wifi, in flight entertainment, or snacks / waters?

Didn't get a seat assignment until the last minute even though i picked a seat.

American has been able to implement an algorithm that makes it possible for nearly every one of my evening flights to be late. Congratulations!

I was on a small regional flight from Detroit to Philadelphia. When we landed the outside cruise needed to turn something off with the engine, which took quite a long time. Then, when they allowed us to get off the plane it was outside. They took their time, unloading all the luggage and waited till they unloaded all the luggage before they brought it over to us. It was 9 o’clock at night freezing cold out, and there was no proactive hustle to try to get people their luggage. It was really one of the worst experiences I think I’ve ever had with American until a manager came over. I don’t think they were going to even consider pulling the luggage over to the people that had been waiting outside for at least 10 minutes in the freezing cold.

The flight attendant use 1.5 hours to answer my call. My dirty food tray was unattended.

The flight was completely full. Crew was not happy. Everyone was rude and brusque. Travelling with an arm in a cast and seating in the first row of economy cabin (in front of the separation) I needed help retrieving my tray for the meal. A staff member literally threw the tray on my lap, without helping to take out the tray. Boarding was messy, with 300 people waiting in an encloses space with low ceiling. I will try to avoid AA next time I have a long flight.

This flight captain and crew were amazing, started ahead of time of departure and reached 30 mins before arrival time. Amazing!

The business class seats are dated and uncomfortable. The space is bare minimum and there is absolutely no privacy. For $4K, this is not what I expect.

Flight, food and crew were all good, friendly and very satisfactory.

Staff's did their best to make everyone comfortable and I appreciate them for it

The seats were comfortable. So many empty seats allowed for stretching out and sleeping. The onboard entertainment was pretty good. The cabin crew were so kind and kept the passengers well- hydrated, and well fed.

We had American Airlines on our return and it was confusing if we were going with Aa or BA I had 2 different flight numbers and didn’t get our gate until it was boarding. So we were a bit nervous as the which it was

My touch screen at my seat wasn't working, the films BA advertised on the website for this flight were not available, and the plane was a little dated, food was good and the staff were good, just let down by the aircraft facilities.

Did not like the seating configuration at all with 2+3+2 in business class. Lacking total privacy and comfort

Check-in experience, for business call please provide a premium experience

Lost my luggage, ran out of food choices in business class, ground crew was completely unapologetic.

Excellent. The crew and flight were great. Checking in was easy and everyone was very helpful.

Entertainment devices on A380 need to be fixed, the seats might do with updates.

Everything. Employees offered to help me because I had to use a cane.

Check-in and boarding were great. On flight staff were rude and disrespectful. Paid for extra room and found it incredibly cramped. Bathrooms kept in poor condition. Overall negative experience.

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
O'Fallon
Wentzville
Farmington
Eureka
Litchfield
Grafton
Shrewsbury
Glencoe

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

Information on the airport you'll fly into in St. Louis