LHR - STL

$588 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 7/2. 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

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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Flights 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

mer, set 3 - mer, set 24
Scandinavian Airlines Logo
6:40 am - 10:02 pmLHR-STL
21h 22m2 stops
Scandinavian Airlines Logo
3:30 pm - 6:30 pmSTL-LHR
21h 00m2 stops
$798Scandinavian Airlines
Find Deal
lun, lug 14 - lun, lug 21
 Logo
8:00 am - 4:31 pmLHR-STL
38h 31m2 stops
 Logo
10:47 am - 11:25 amSTL-LHR
18h 38m2 stops
mer, set 3 - mer, set 24
Lufthansa Logo
6:30 am - 1:30 pmLHR-STL
13h 00m1 stop
Lufthansa Logo
9:17 am - 5:55 amSTL-LHR
14h 38m2 stops
$840Lufthansa
Find Deal
ven, set 12 - sab, set 20
Lufthansa Logo
6:30 am - 1:30 pmLHR-STL
13h 00m1 stop
Lufthansa Logo
1:10 pm - 6:55 amSTL-LHR
11h 45m1 stop
$871Lufthansa
Find Deal
sab, set 13 - sab, set 27
United Airlines Logo
7:25 am - 5:52 pmLHR-STL
16h 27m2 stops
United Airlines Logo
9:20 am - 6:45 amSTL-LHR
15h 25m2 stops
$875United Airlines
Find Deal
ven, set 12 - sab, set 20
United Airlines Logo
8:00 am - 7:39 pmLHR-STL
17h 39m1 stop
United Airlines Logo
9:17 am - 5:55 amSTL-LHR
14h 38m2 stops
$879United Airlines
Find Deal
lun, ott 13 - dom, ott 19
Air Canada Logo
6:50 am - 3:18 pmLHR-STL
14h 28m2 stops
Air Canada Logo
4:05 pm - 11:50 amSTL-LHR
13h 45m1 stop
$1,011Air Canada
Find Deal
lun, ott 13 - dom, ott 19
British Airways Logo
9:15 am - 4:22 pmLHR-STL
13h 07m1 stop
British Airways Logo
8:01 pm - 12:15 pmSTL-LHR
10h 14m1 stop
$1,039British Airways
Find Deal
sab, ago 9 - sab, ago 30
Air Canada Logo
8:30 am - 7:45 pmLHR-STL
17h 15m1 stop
Air Canada Logo
4:00 pm - 6:30 amSTL-LHR
32h 30m2 stops
$1,105Air Canada
Find Deal
lun, ago 4 - mar, ago 12
British Airways Logo
2:25 pm - 8:19 pmLHR-STL
11h 54m1 stop
British Airways Logo
1:24 pm - 6:50 amSTL-LHR
11h 26m1 stop
$1,118British Airways
Find Deal
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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 Thursdays and the most expensive ones on Fridays.

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 $811 (return) on average. On the other hand, the most expensive months are December and August, where the average cost of round-trip tickets is $1,176 and $1,159 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. For the absolute cheapest price, our data suggests you should book 4 weeks before departure.

Good to know

Low seasonMarch
High seasonJuly
Cheapest flight$588
Best time to beat the crowds with an average 12% drop in price.
Most popular time to fly with an average 8% 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 $588 for a one-way ticket and $798 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?

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

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

    oneworld, Star Alliance, and SkyTeam 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, United Airlines or Lufthansa?

    The two airlines most popular with KAYAK users for flights from London to St. Louis are United Airlines and Lufthansa. With an average price for the route of $1,263 and an overall rating of 7.4, United Airlines is the most popular choice. Lufthansa is also a great choice for the route, with an average price of $928 and an overall rating of 6.8.

  • 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.

Top 4 airlines serving 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.
7.4
United AirlinesOverall score based on 8798 reviews
7.7Boarding
7.3Comfort
8.1Crew
7.0Entertainment
6.6Food
Airline reviews

Evidently, my seat had the only broken TV. I couldn’t plug it in, get it to come on, or watch anything, and of course, no one could fix it while we were on the plane. The service was good and the boarding was quick

8.0 ExcellentStacie, Jun 2025ORD - ALB
Read more United Airlines reviews

Evidently, my seat had the only broken TV. I couldn’t plug it in, get it to come on, or watch anything, and of course, no one could fix it while we were on the plane. The service was good and the boarding was quick

United airlines, mediocre at best. No issues , nothing great . Worked for me

Efficient, calm when things were delayed and kept us regularly informed of what was happening.

it was so bad. I tried to board my flight from vancouver to saskatoon. And to my surprise they did not board me cause the flight was changed and no email was send to me. and on my boarding pass which i got from seattle says different flight. I did not knew anyone from Vancouver, air canada crew was rude, i asked for today flight but they were rude and i had early morning dental appointment in saskatoon. I was so much in pain and my whole day is wasted today. and i suffered alot. They did provide me hotel but they did not provide me any food. I am really really disappointed first time had so bad experience with air canada. I may think twice to book it again. If i can get any reply or any composition that would be great. Thanks

It was fine, definitely older planes with no charging or anything. There’s no entertainment set up on board, but it is nice that they allow you to access the in flight entertainment from your phone without having to pay for the Wi-Fi and they do offer free texting.

Boarding was mayhem. Late boarding by 15 minutes because of lack of staff (missing 1 flight attendant. We had to wait for an arrival of another plane before we could board). Flight was a little rough, but cannot blame on airlines.

Impressed with the service despite turbulence because of the weather. Both flights arrived before their scheduled times.

Very comfortable (upgraded to business class). The audio on my screen didn’t work, but I managed to play the audio through my phone while watching the screen.

Great experience…left a bit behind schedule but made up fir that in the air and landed 10 minutes early 😁

I was supposed to be on business class at first class from Denver back to Miami due to weather changes. I missed my connection and it’s put on a flight to Fort Lauderdale. Instead of honoring my business class/1st class ticket, they put me in coach, but there were two first class seats open. I think it’s absolutely disgusting that I paid for first class $1300 ticket and they put me in economy and they had to open seats available and I have still not been refunded the difference. I ended up having to eat a snack box instead of the meal I was supposed to get and did not get home till 2 AM so I think that’s a little pathetic that I had to live off crackers for dinner And my poor dog ate some cheese and salami. Oh yes, apparently when they switched me to the new flight they forgot to mention I had a service dog

The flight crew were friendly and attentive. Food was good and they passed out ice cream and drinks awhile after Lunch was done. The ice cream was a nice treat! I found several movies to watch during the flight. There was many movies and tv shows to choose from. We flew Premium economy and there was enough leg room to be comfortable. The seats were also comfortable. I would fly AA again if the airfare isn’t expensive.

The chair cushions may need an upgrade. I have been noticing they are so worn out, thin so you’d sit in a dip 😄. Other than that, all was an enjoyable trip. Thanks AA!

Gate check bags that had to be gate checked because of first flight being a small flight are missing. British airways lost the luggage and haven’t met up with them yet!

Staff lovely , economy seats very uncomfortable , wheelchair assistance wonderful in Heathrow awful in Nashville !

Good crew and a great experience. Only good things to say.

Improvements in communication and empathy are absolutely necessary for American Airlines staff (top down). It’s like they are numb to the needs of their customers.

Great thanks - a whole row to myself. Good food but film selection not great.

It is okay. Flight was on time to start and early to land

I had a TERRIBLE experience with the AA crew. I believe it was disability-related. It’s unlikely I will fly AA again.

Fantastic. I am low vision and was impressed with how helpful and accommodating the service tam was. It was super appreciated! I was pleasantly surprised about how delicious the food was. Like, “I wish I had more even though I’m no longer hungry” delicious. 100% enjoyable trip.

I was very grateful for Lufthansa's role in organizing mobility support. The touchscreen on my seat was faulty: slow, stained (I couldn't get it clean), and glitchy. This made selecting movies extremely time consuming, and twice I had to start all over from the beginning.

Beautifully maintained airplane, good food, professional crew, top-notch communication. I highly recommend Lufthansa for intercontinental flights between the United States and Europe.

Lufthansa is my favorite airline and have flown oversea with them for the past 25 years: i always found them so professional and incredibly efficient from checking in to arrival. I also love their Munich or Frankfurt airports.

The United flight was excellent! The flight attendants were attentive and nice, and the food was very good! And the glasses are larger than on Lufthansa flights! I don’t want to have to ask for 15 glasses of water because their glasses are ridiculously small!

The food not that great. Did not like the fact that we could not purchase upgrade at the airport

We paid for business class, and my seat did not work at all. Each time I wanted to adjust the position, an attendant had to come to physically force the seat into its new position. They tried to fix it by fiddling with the electronics (military reset, for example), to no avail. Also, the food was just mediocre. We were at the end of a serving section, so they ran out of several choices. (This was on the flight from Los Angeles to Munich.)

The crew was the best I’ve ever encountered. Business class was spacious, immaculate, and very modern.

The flight was delayed by an hour. Made the connection uncomfortably tight.

The plane was very clean. The bathroom was clean as well. The land crew were very polite and informative and helpful. They informed me that there is a long way and challenging to go from international terminal to national terminal and in addition to getting my suitcases and going through customs and dropping them again for my second leg of trip which was San Francisco to Los Angeles . I have left knee issue and had a recent fall with aching muscles all over, the land crew suggested wheelchair help for me, God bless her. If I did not have help, I could not make it to my last terminal. Thank you UNITED AIRLINE!

I like the service and the efficiency. I am lactose intolerant and the lactose intolerant meal in business class was not astounding. Also, the business class fully reclining seats are not that comfortable.

Better synchronizing the boarding processes. The audio announcements, the personnel and the digital signage were not saying the same thing. All confusion.

The first class seats were unusable, mine at the end of the flight, my husband's in the middle of the flight, and the one next to me was unusable either, they had to move the person to another seat.

Last minute gate change. Didn’t put our TSA global on our trip even though we asked multiple times to confirm. Did not help with food when could not eat what was served.

The cabin was bit colder than I like but the crew members looked after us very well. They did even offer hot water bottle and hot chocolate. I cannot rate the crew enough excellent is not good enough. They really were wonderful.

Boarding is always a challenge as folks in al groups crowd around for no reason, but crew handled it well. I once again applaud the LHR ground baggage staff as they got our bags from a flight at Terminal 5A to a flight in Terminal 5C within 40 minutes...amazing!

This flight from London to Chicago was actually on an AA airline. I did book through BA but the flight was AA. Great flight, hectic in Chicago, I wouldn't choose to fly through Chicago again, but that's not the airlines fault. The flight itself was great.

Push back is not working when I complaint a male staff he told me that most of the seats are like that so we can’t do anything

Seats were way too small. I got claustrophobic waiting for trash from meal to be taken away. I couldn't move to even close my tray until trash was taken.

Boarding was fairly chaotic. One of your employees clipped my ankle as he was passing with an empty wheelchair and not only did not apologize but stated something to the effect of “oh forGod’s sake.” There was plenty of room for him to pass. otherwise, everything was excellent.

Fantastic! Great seats! Friendly staff! Amazing selection of shows and movies! Smooth ride! I don’t know what more I could have asked for honestly. They made flying a breeze this time around.

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

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