$365 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 2/26. 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
Travelers love KAYAK
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Everything you should know

Cheapest round-trip
$594
Overall average: $872
Lufthansa
Fri 3/13Tue 3/17
LHR - STL • 1 stop
Cheapest non-stop
$736
American Airlines
Sun 5/3Fri 5/8
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
When to travel
March
Cheapest • 25% price drop
July
Most popular
Good to know
Good to know
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+1
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+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

Fri, Mar 13 - Tue, Mar 17
Lufthansa Logo
6:30 am - 2:55 pm
LHR
-
STL
13h 25m
1 stop
Lufthansa Logo
1:14 pm - 5:55 am
STL
-
LHR
11h 41m
1 stop
$594Lufthansa
Mon, Mar 9 - Mon, Mar 16
Multiple Airlines Logo
12:05 pm - 3:29 pm
LHR
-
STL
56h 24m
2 stops
Multiple Airlines Logo
7:00 pm - 11:15 am
STL
-
LHR
11h 15m
1 stop
$596Multiple Airlines
Thu, Mar 5 - Sat, Mar 14
United Airlines Logo
9:00 am - 9:42 pm
LHR
-
STL
18h 42m
2 stops
United Airlines Logo
7:41 am - 5:55 am
STL
-
LHR
17h 14m
1 stop
$605United Airlines
Wed, Mar 11 - Wed, Mar 18
United Airlines Logo
6:30 am - 2:55 pm
LHR
-
STL
13h 25m
1 stop
United Airlines Logo
5:41 pm - 11:05 am
STL
-
LHR
12h 24m
1 stop
$606United Airlines
Thu, Mar 12 - Thu, Mar 19
British Airways Logo
7:50 am - 9:11 pm
LCY
-
STL
18h 21m
2 stops
British Airways Logo
2:00 pm - 2:05 pm
STL
-
LCY
19h 05m
2 stops
$708British Airways
Wed, Mar 11 - Tue, Mar 24
Delta Logo
10:45 am - 8:42 pm
EDI
-
STL
14h 57m
2 stops
Delta Logo
1:39 pm - 10:40 am
STL
-
EDI
16h 01m
2 stops
$724Delta
Wed, Mar 11 - Wed, Mar 18
Delta Logo
10:45 am - 8:42 pm
EDI
-
STL
14h 57m
2 stops
Delta Logo
10:12 am - 10:40 am
STL
-
EDI
19h 28m
2 stops
$728Delta
Wed, Feb 18 - Tue, Feb 24
Virgin Atlantic Logo
1:00 pm - 11:36 pm
MAN
-
STL
16h 36m
1 stop
Virgin Atlantic Logo
11:55 am - 10:30 am
STL
-
MAN
16h 35m
1 stop
$735Virgin Atlantic
Mon, Feb 23 - Mon, Mar 2
Virgin Atlantic Logo
8:40 pm - 11:36 pm
MAN
-
STL
32h 56m
2 stops
Virgin Atlantic Logo
3:47 pm - 12:45 pm
STL
-
MAN
14h 58m
2 stops
$739Virgin Atlantic
Thu, Feb 5 - Mon, Feb 9
British Airways Logo
9:55 am - 10:59 pm
GLA
-
STL
19h 04m
2 stops
British Airways Logo
2:54 pm - 1:05 pm
STL
-
GLA
16h 11m
2 stops
$798British Airways
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 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 February, where tickets cost $863 on average for one-way flights. On the other hand, the most expensive months are June and August, where the average cost of tickets from the United Kingdom is $1,909 and $1,541 respectively. For return trips, the best month to travel is March with an average price of $726.

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 seasonMarch
Cheapest flight$365
Best time to beat the crowds with an average 8% drop in price.
Most popular time to fly with an average 13% increase in price.
Flight from London Heathrow Airport to St. Louis

FAQs - booking St. Louis flights

  • 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 1,821 direct flights from within United Kingdom to St. Louis. The most common day for departures is Monday, with 16% 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 airlines flying 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 9205 reviews
7.3Comfort
7.7Boarding
7.1Entertainment
8.1Crew
6.6Food
Airline reviews

HORRIBLE, my initial flight was cancelled, they made me pay $200 extra dollars and that got cancelled as well! After 6 cancellations I decided to get a refund because I needed to get home to my babies. Out of $1000+ dollars they offered me only $40 in refund! Totally unacceptable! The flight that they cancelled I was able to fly it on another airline. I had to spend $400 on one way tickets just to get home! I’m still getting the runaround.

2.0 MediocreSonje’, Jan 2026
STL - EWR
Read more United Airlines reviews

HORRIBLE, my initial flight was cancelled, they made me pay $200 extra dollars and that got cancelled as well! After 6 cancellations I decided to get a refund because I needed to get home to my babies. Out of $1000+ dollars they offered me only $40 in refund! Totally unacceptable! The flight that they cancelled I was able to fly it on another airline. I had to spend $400 on one way tickets just to get home! I’m still getting the runaround.

First class ticket gets you a choice of chips or nuts. . Just like economy Southwest. Also no screen in the seats. This is first class???!

Seated dude next to me even though lots of empty rows. But main thing was we sat on the tarmac after landing for 30 minutes because of, in the words of the dude who sat next to me, “operational incompetence”. We got changing directions about where to pick up gate checked bags. Pilot and flight attendant were awesome though.

It was a pretty standard flight... until the almost hour and a half spent on the taxi way. I get that the weather has been poor but the delay had nothing to do with the weather and more to do with a plane with several issues tying up the gate. I get that that happens from time to time but this has been EVERY flight I've been on for the past 5 years and I fly 3 to 5 times a year. This isn't just United... it's American, it's Delta. It's an issue with the entire industry. I work for UPS and packages on a cargo plane get better service than people do these days. Anymore I HATE flying.

I so appreciate the crew members on each flight of United. They are outstanding.

Flight arrived 30 min early and bag was waiting at the baggage pickup. United Club HNL was one of the nicest in the system

Unfortunately weather delayed our flight waiting for our plane to arrive and due to a little snow time was needed to deice the plane so departure was very delayed and I missed the connecting flight

Mean flight attendant. I wanted to reuse my plastic cup, but he (Matthew) said he can't for safety. I then said "I don't want water then" and he poured me a glass. I hope Matthew gets herpes and spends the rest of his life poor, lonely, and homeless.

Very good. Because of the delays with my previous flight, I missed my connection, but I was able to book another flight through the United app easily.

It was great. There were some issues prior to takeoff. The weather was poor so we had to go through deicing, and we were delayed a bit by the pilots' concern about one of the engines, but that's aviation. The pilots handled everything with aplomb, and kept us apprised

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.

Great seat in premium economy, great food and drinks throughout lots of in flight entertainment. 1 hour 40 min delayed flying out , 2 1/2 hour wait at passport control in tampa

My seat cushion was poor. The cushion was compressed and was uncomfortable for such a long flight.

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