LHR - STL

$484 Find Cheap Flights from London Heathrow Airport 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 from Heathrow to St. Louis departing on 11/18. 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 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
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Flight Deals

Cheap Flights from Heathrow to St. Louis (LHR-STL)

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

Wed, Nov 26 - Wed, Dec 3
British Airways Logo
11:55 am - 7:30 pmLHR-STL
13h 35m1 stop
British Airways Logo
3:59 pm - 10:00 amSTL-LHR
12h 01m1 stop
$722British Airways
Find Deal
Mon, Dec 8 - Tue, Dec 23
Virgin Atlantic Logo
5:35 pm - 9:57 pmLHR-STL
34h 22m2 stops
Virgin Atlantic Logo
7:02 pm - 7:50 amSTL-LHR
30h 48m1 stop
$723Virgin Atlantic
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Mon, Dec 8 - Tue, Dec 23
Multiple Airlines Logo
11:45 am - 6:43 pmLHR-STL
12h 58m1 stop
Multiple Airlines Logo
11:41 am - 10:00 amSTL-LHR
16h 19m1 stop
$724Multiple Airlines
Find Deal
Wed, Nov 26 - Wed, Dec 3
Delta Logo
11:45 am - 8:46 pmLHR-STL
15h 01m2 stops
Delta Logo
11:40 am - 6:25 amSTL-LHR
12h 45m1 stop
$727Delta
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Wed, Dec 3 - Wed, Dec 10
KLM Logo
11:45 am - 8:47 pmLHR-STL
15h 02m2 stops
KLM Logo
2:02 pm - 7:50 amSTL-LHR
11h 48m1 stop
$728KLM
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Tue, Jan 13 - Fri, Jan 23
Finnair Logo
10:05 am - 7:29 pmLHR-STL
15h 24m1 stop
Finnair Logo
6:02 pm - 12:20 pmSTL-LHR
12h 18m1 stop
$732Finnair
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Tue, Jan 13 - Fri, Jan 23
Finnair Logo
6:10 pm - 7:29 pmLHR-STL
31h 19m2 stops
Finnair Logo
11:55 am - 11:40 amSTL-LHR
17h 45m1 stop
$736Finnair
Find Deal
Thu, Nov 27 - Thu, Dec 4
KLM Logo
6:30 am - 4:49 pmLHR-STL
16h 19m2 stops
KLM Logo
12:49 pm - 7:05 amSTL-LHR
12h 16m1 stop
$768KLM
Find Deal
Fri, Feb 20 - Wed, Feb 25
Delta Logo
11:45 am - 11:40 pmLHR-STL
17h 55m2 stops
Delta Logo
8:50 am - 8:05 amSTL-LHR
17h 15m2 stops
$776Delta
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Fri, Apr 24 - Sun, May 3
Multiple Airlines Logo
4:25 pm - 7:30 pmLHR-STL
9h 05mnonstop
Multiple Airlines Logo
4:09 pm - 6:20 amSTL-LHR
32h 11m1 stop
$781Multiple Airlines
Find Deal

Everything you should know

Top airlines
British Airways
Cheapest • from $722 (round-trip)
Lufthansa
Best reviews • 6.8 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
4 weeks
in advance
Our data shows that travelers who book at least 4 weeks in advance save around 34% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
February
Cheapest • 17% price drop
July
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest round-trip
$722
Overall average: $953
British Airways
Wed 11/26Wed 12/3
LHR - STL • 1 stop
Cheapest non-stop
$809
Finnair
Fri 4/24Sun 5/3
LHR - STL • Non-stop
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We hope you love your trip to St. Louis!
Booking Insights

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

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

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

When flying from London Heathrow Airport to St. Louis, you should consider leaving on a Thursday and avoid Saturdays if you are looking for the best rates. For your return to London Heathrow Airport, you’ll find the best rates on Sundays and the most expensive ones on Wednesdays.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from London Heathrow Airport 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 Heathrow Airport to St. Louis is February, where tickets cost $813 (return) on average. On the other hand, the most expensive months are December and August, where the average cost of round-trip tickets is $1,166 and $1,157 respectively.

How far in advance should I book a flight from London Heathrow Airport 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 from London Heathrow Airport 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 on the flight from London Heathrow Airport to St. Louis, you should book around 4 weeks before departure, which saves you about 34% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 4 weeks before departure.

Good to know

Low seasonFebruary
Cheapest flight$484
Best time to beat the crowds with an average 17% drop in price.
Most popular time to fly with an average 7% increase in price.
Flight from London Heathrow Airport to St. Louis

When to book flights from Heathrow to St. Louis

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

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

    In the last 3 days, the lowest price for a flight from London Heathrow Airport to St. Louis was $484 for a one-way ticket and $722 for a round-trip.

  • Do I need a passport to fly between London Heathrow Airport and St. Louis?

    Yes

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

    When flying out of London Heathrow Airport you will be using London Heathrow. You will be landing at St. Louis, also known as Lambert-St Louis.

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

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

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

    Star Alliance, and oneworld are the airline alliances operating flights between London Heathrow Airport 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, Lufthansa or British Airways?

    The two airlines most popular with KAYAK users for flights from London to St. Louis are Lufthansa and British Airways. With an average price for the route of $925 and an overall rating of 6.8, Lufthansa is the most popular choice. British Airways is also a great choice for the route, with an average price of $1,063 and an overall rating of 6.7.

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

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from London Heathrow Airport 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 Heathrow Airport 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 Heathrow Airport 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 Heathrow Airport with another airline. Booking your flights between London Heathrow Airport and STL can sometimes prove cheaper using this method.

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

Reviews of the top airlines flying from Heathrow 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 Heathrow 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.
6.8
LufthansaOverall score based on 7541 reviews
6.3Food
7.0Boarding
6.8Comfort
6.4Entertainment
7.6Crew
Airline reviews

Paid for exit row at the back of the plane. Window seat with lots of leg space. Food was inedible (as usual). Brought my own.

6.0 GoodAnonymous, Oct 2025LHR - YYZ
Read more Lufthansa reviews

Paid for exit row at the back of the plane. Window seat with lots of leg space. Food was inedible (as usual). Brought my own.

The seat space seemed small especially when the person ahead reclined but other than that, very good.

Luggage transfer in Chicago was not performed in time. I received my luggage at my destination two days later.

Give yourself over 2+ hours layover because if flight is slighlty delayed and you miss your connection, Lufthansa will do nothing for you

We would have missed our connection from Munich to Boston but we had a van outside the plan that wisked us to our terminal. Much appreciated and we didn’t even realize that Lufthansa had done this until the announcement on disembarkation. Well organized airline! Will definitely fly Lufthansa again!!!

Everything went well. I will fly with Lufthansa again. And use Kayak whenever I book flights

Bought a seat in a flight that got changed out so ended up paying for a seat I would have had if I hadn't paid.

Food was poor quality and the screens for entertainment didn’t work properly

Food was much better than my outbound flight. On-time. Good service. I had a problem with my entertainment screen, but the attendant fixed it promptly.

I think they overbooked Frankfurt to New York and bumped me off. This changed my return travel I arrived home about 4 hours late. Almost 24 total travel time Totally unacceptable Would not travel with United

There might be more food options for people who can't eat so much starch/sugar/bread/rice. Meat, cheese, walnuts/pecans for snack, maybe jerky or other kinds of meat-based snacks would be better than bread and rice and sweets. I had an extra chardonnay, which was fine. The entertainment was great.

Unfortunately, my flight was cancelled because of some sort of emergency over the Atlantic and had to return to London. While I think British Airways made every effort to mitigate the situation, I must say it was still pretty unpleasant. I do appreciate the fact, however, that British Airways put my safety first…and I think the effort to correct a bad situation was very sincere. But I think the process might be handled better in future.

Crew service was poor and very little difference between premium economy and economy. Disappointed.

My bags never made it on the flight and I now have to wait for them to arrive hopefully tomorrow. You can’t even track your bags in the app to see where they are since they didn’t arrive. You have to file a claim and then wait for them to inform you when you will receive your bag. We were already delayed for an hour due to baggage so I don’t understand how my bag didn’t make the flight.

One of the worst experience given the middle seat even asked for the change no one honored,boarded at the end and overall one of the worst experience

It was good although our flight to the UK was cancelled and rescheduled for two days later. This was after we were already seated on the plane. We missed the first leg of our trip. BA did put us up at a hotel and paid for our meals but we lost our hotel costs in Glasgow.

The crew was very nice and pleasant. We were very reluctant to book our flight with British Airlines because we had bad experience with their flight attendants on the previous trips, they were rude and not helpful.

I am a 25+ years American Airlines member. British Airways is simply above and beyond in every customer satisfaction category.

The seat pads are past there sell by date now and are uncomfotable. Also, with screens in the back of the seat, the seats shouldnt be able to recline as this puts rhe screen in your face.

1. The website didn’t allow me to checkin from London as I have Bangladesh passport with US permanent resident card. This pushed me to sit with my wife in the middle of two aisle seats, terrible experience! 2. BA should allow within 24 hours to checkin with other passport holders to choose better seats. A 2nd verification of travel documents can be done at the desk about immigration status. 3. Food options were poor for vegetarian passengers, try to introduce healthy options avoiding carb-dense food ingredients.

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

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