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STL - LON

$234 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 7/9. 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
0 bags
Wed 7/10
Wed 7/17

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These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis 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.
In the last 7 days travelers have searched 42,898,604 times on KAYAK, and here is why:

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Cheap flight deals from St. Louis to London (STL-LON)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip 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 and deals for you by selecting your travel dates.
Choose your dates
11:10 am - 9:00 amSTL-LHR
15h 50m1 stop
2:05 pm - 10:07 amLHR-STL
26h 02m2 stops
$626United Airlines
Find Deal
Tue, Sep 24 - Tue, Oct 1
5:34 pm - 5:55 amSTL-LHR
30h 21m1 stop
2:05 pm - 10:07 amLHR-STL
26h 02m2 stops
$631United Airlines
Find Deal
Sat, Oct 12 - Tue, Oct 22
10:10 am - 10:00 amSTL-LHR
17h 50m2 stops
2:05 pm - 9:05 pmLHR-STL
13h 00m1 stop
$634Air Canada
Find Deal
Sun, Oct 6 - Thu, Oct 17
10:10 am - 6:30 amSTL-LHR
14h 20m2 stops
9:30 am - 8:00 pmLHR-STL
16h 30m2 stops
$645Air Canada
Find Deal
Wed, Oct 9 - Wed, Oct 23
3:55 pm - 12:15 pmSTL-LHR
14h 20m2 stops
9:20 am - 4:45 pmLHR-STL
13h 25m1 stop
$703Virgin Atlantic
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Fri, Sep 20 - Fri, Sep 27
3:55 pm - 12:15 pmSTL-LHR
14h 20m2 stops
8:05 pm - 7:08 pmLHR-STL
29h 03m2 stops
$713Virgin Atlantic
Find Deal
Fri, Sep 20 - Fri, Sep 27
4:22 pm - 12:45 pmSTL-LHR
14h 23m1 stop
7:20 am - 10:17 pmLHR-STL
20h 57m2 stops
$739British Airways
Find Deal
Wed, Aug 14 - Tue, Aug 20
4:18 pm - 11:05 amSTL-LHR
12h 47m1 stop
9:15 pm - 8:59 pmLHR-STL
29h 44m2 stops
$760British Airways
Find Deal
Wed, Aug 14 - Sun, Aug 18
11:05 am - 6:50 amSTL-LHR
13h 45m1 stop
9:35 am - 6:21 pmLHR-STL
14h 46m1 stop
$941American Airlines
Find Deal
Fri, Jul 5 - Thu, Jul 25
4:22 pm - 9:00 amSTL-LHR
10h 38m1 stop
12:15 pm - 7:34 pmLHR-STL
13h 19m1 stop
$956American Airlines
Find Deal
Fri, Aug 30 - Mon, Sep 9

Flights from St. Louis to London - Travel Insights & Trends

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’s the cheapest day of the week to fly from St. Louis to London?

The average price of all flights from St. Louis to London clicked on KAYAK for each day over the last 12 months.
If you are looking for a flight deal from St. Louis to London, look for departures on Wednesdays and avoid leaving on a Tuesday, as it's usually the priciest day. When flying back from London, Wednesday is the cheapest day to fly and Sunday is 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 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 February, where tickets cost $719 on average. On the other hand, the most expensive months are June and July, where the average cost of tickets is $1,464 and $1,101 respectively.

How far in advance should I book a flight from St. Louis to London?

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for 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 month.
To get a below average price on the flight from St. Louis to London, you should book around 2 days before departure. For the absolute cheapest price, our data suggests you should book 9 days before departure.

Which airlines provide the cheapest flights from St. Louis to London?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
In the last 3 days, Air Canada offered the best one-way deal for that route, at $424. KAYAK users also found St. Louis to London round-trip flights on United Airlines from $626 and on Air Canada from $634.

Good to know

Low season

February

High season

July

Cheapest flight

$234
Best time to beat the crowds with an average 23% drop in price.
Most popular time to fly with an average 18% increase in price.
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 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 flights from St. Louis to London

  • Are there hotels near London airports?

    There are a lot of hotels at and surrounding Heathrow Airport, and they provide rooms at prices to suit a wide range of budgets. The Yotel is a hotel with a pod-like design that is located inside Terminal 4 and is styled like the first-class cabin of an airplane. You may book rooms on an hourly basis, which is an excellent choice if you have a stopover and need to get some sleep before continuing on your journey.

  • What is the most reliable way to get to the city center from the Heathrow Airport London (LHR)?

    The most reliable way to get into s the town center is to take either the Tube's Piccadilly Line or the Heathrow Express train. This option is best if you only have to wait for less than 6h, but it is a lot more expensive than the Tube.

  • Are there banking services available at Lambert-St Louis Airport (STL)?

    A full-service US Bank offers comprehensive banking and foreign exchange services. It is situated in Terminal 1, Lower Level, across from Great American Bagel.

  • Does Lambert-St Louis Airport (STL) have lactating rooms for mothers?

    St. Louis Lambert International Airport (STL) has a private, designated place for nursing mothers. The room is situated after security checkpoints on all three concourses, close to Gates A10, C9, and E33.

  • 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 $234 for a one-way ticket and $626 for a round-trip.

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

    A passport is required to fly from St. Louis to London.

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

    When flying out of St. Louis you will be using Lambert-St Louis. You will be landing at one of these airports: London Gatwick, London Heathrow, or London Stansted.

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

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

  • What is the most popular layover when flying to London from St. Louis?

    Chicago is the most popular layover city among KAYAK users traveling from St. Louis to London.

  • Which is the best airline for flights from St. Louis to London, Delta or KLM?

    The two airlines most popular with KAYAK users for flights from St. Louis to London are Delta and KLM. With an average price for the route of $807 and an overall rating of 8.0, Delta is the most popular choice. KLM is also a great choice for the route, with an average price of $873 and an overall rating of 7.8.

  • 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 round-trip 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.

See more FAQs

Top tips for finding a cheap flight from St. Louis to London

  • If you want to travel to London from Lamber St Louis, there are three main airports you can use for your arrivals, London Heathrow Airport (LHR), Gatwick Airport (LGW), and London City Airport (LCY). London Heathrow airport is the main international airport connecting cities and nearby countries.
  • There is a lounge that you may access by either making a payment at the door or enrolling in a lounge membership program, and this is regardless of the class of service that you are flying at Lambert-St Louis (STL). There is also a facility called the USO that provides active members of the United States military and their families with access to a lounge that is free of charge.
  • You may take your children to the play area for youngsters if you want to make sure that they use up all of their excess energy before taking off on their flight. An exhibit with a focus on transportation may be seen at the St. Louis International Play Port, which can be found in the STL airport near Gate C3.
  • If you have any inquiries while at St Louis Airport, you can go to one of the information desks located around the airport for help. Passengers in Terminal 2 have many options for getting in touch with the Information Booth. You may use the courtesy phones that are situated at Gate E10 or in the baggage claim area just across from the Southwest Airlines Baggage Office.
  • Heathrow Airport (LHR) does not provide complimentary wireless Internet access. Instead, it offers Boingo, a pay-as-you-go Wi-Fi service. There are additional PCs with wired Internet connections available at each terminal, however, they are also for a fee. However, if you pay to enter an executive lounge such as o1 Lounges, Plaza Premium, and Club Aspire, you will enjoy free internet access. London City Airport and Gatwick Airport on the other hand offer complimentary Wi-Fi connection and each lounge has a shower.
  • If you need assistance with your bags, there are baggage carts available for a fee at the departures area of Terminal 1 and in the baggage claim sections of Terminals 1 and 2 respectively at STL Airport.
See more tips

Top 5 airlines serving 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.
7.6
Virgin AtlanticOverall score based on 714 reviews
7.7Entertainment
8.3Crew
7.8Boarding
7.1Food
7.4Comfort
Airline reviews

Cabin crew on our flight showed lack of any customer service gruff and acting annoyed if you asked anything and I mean anything Example a man on the seat over dropped his beer on my husbands blanket We asked if we could switch out blankets cabin crew Said. No we don’t have any extras OK well can you take the wet one Cabin crew looked disgusted and annoyed Took it no OK or yes just a growl

6.0 GoodSonia, Apr 2024LAX - LHR
Read more about Virgin Atlantic reviews

Cabin crew on our flight showed lack of any customer service gruff and acting annoyed if you asked anything and I mean anything Example a man on the seat over dropped his beer on my husbands blanket We asked if we could switch out blankets cabin crew Said. No we don’t have any extras OK well can you take the wet one Cabin crew looked disgusted and annoyed Took it no OK or yes just a growl

Quick flight. But cabin crew were very noisy and talking too much, especially when we were seated at the back of the plane trying to sleep through the night .

My ticket was for Premium Economy and all the seats were taken, I was placed in Economy class and I’m looking for a refund.

Unfortunately delayed 2 hrs due to faulty tyre.. which had to be changed, but better safe than sorry.

The delay was an issue. Other than that. Every thing good

Hi vergin Atlantic service was good but the flight ticket agent travel up charge me extra 57 pounds as a airport charges, actually I refuse to pay but they say if I not pay £57 then they say you will not be able to travel from Heathrow to goa ,so for me there was no option and it was just 3 day before my departure so i paid, so please look in to the matter. And I have a receipt of £ 57 as well .thanks

Staff didn’t check cabin well for landing seemed more interested in chatting to each other. Food was poor and differed from pre order.

We were in the last group to be called to the flight - which was 30 minutes late taking off. While we were lucky enough to have been given bulkhead seats (due to a medical condition I’d told them about beforehand) the seats weren’t particularly comfortable. A crying baby for the whole trip made things worse, so the crew managed very well with coping. The final thing I’d say was that there wasn’t enough food served during the flight.

Very good. Glad we had Premium for the flight out.

We flew Upper Class from London to The Turks and Caicos. Check in was amazing. Our ldriver too us directly to a special entrance to terminal 3. It took 10 minutes to check in and clear customs. Amazing! The VA lounge is large and comfortable. Boarding the flight was easy and without a wait. The crew was excellent. But the seats were awful, strange and uncomfortable. Having a comfortable flat bed seat is the reason we pays 1000s extra. The VA 787 uses a reverse herringbone configuration. Look it up. You have your back to the window and are facing the aisle with no privacy. Turning the seat into a bed requires assistance from the crew so not very spontaneous. . The food was ok. A bit tasteless and meager portions. Had to pay for WiFi. I believe VA has other configuration on their dream airbus flights. Lots of stuff about all this on YouTube where you can see what I have been describing. I can not recommend taking VA on a long flight with these seats.

Good. Food items are ok but not really healthy (no protein for the vegetarian option, just a total of 2 gr total) so not fulfilling. Also, no airline is educating passengers to behave and have common sense: let the one sitting by the window pass first, leave toilets clean after use, etc. Humanity is just getting rude and more disgusting by the day and without education or enforced common sense no

My only issue was my meal was inedible except for the sides.

Old cabine without flat bed in business for a 12 hour flight is not acceptable

Medíocre. The food wasn't good (although not bad, bad) and the staff wasn't kind. I asked for n extra blanket, the steward never came back, serving us roughly.

Generally good. The crew is excellent. The food could be better.

They charge me for luggage which is was included on the ticket

Boarding was smooth and on time. The seat was comfortable and the entertainment worked. Staff were gracious.

Good aorcraft 777 but Worst food ever Breakfast was a bû’with matonnaise… Staff was nice but invisible most of the flight

Business class in the second leg - CDG-EVN was a disaster.

worst experience ever i choose my seat in advance and also have my seat selected in my boarding and the they told me that my seat has been changed without notify me

Why does it have to be painful to fly long distances?

It is a modern tragedy that any airline expects you to travel for 14 hours in such discomfort and that the only way to add comfort is exorbitant prices. I was in pain by the time we landed. Shameful.

Original plane sidelined. Had to wait an hour for replacement.

Crew was very cooperative and professional. Passenger's first checked in bag should be free.

No real agent onsite helping you for missing luggage there. Not like the other airline next to UA desk, they have staff attending in their desk assisting answer/helping luggage issue, even after midnight.

Horrible, the flights kept delaying, so it is obvious that we won't be able to make it to the next connection. No easier/real agent on site to help you figure this out. UA agent on other counters refuse to assist you and direct us to use the QR code/call customer service. So inefficient and poor. While technology seems convenient, but it's not the best interest/experience for customers need help while there is active issue need assistance.

Food is very bad and entertint not too many options ... flight attendet service is not good

After the morning frenzy of 35 min wait through CLT security at 4;30 AM, it was nice to have a smooth pleasant boarding experience. This 6:30 AM flight was not full. We were able to get seated swiftly and took off promptly. Nice touch they distributed the old fashioned headsets with 8 mm jacks. Snacks were decent and arrival was uneventful.

My window shade didn’t work. So I missed coming into my city. ☹️

Flight was delayed in the gate by 5 hours and ultimately cancelled- rebooking service by United agents was terrible

Information when booking said the flight would be with American Airlines but the flight was actualy with British Airways. Check in from Orlando was nice and quick. I agreed to put my cabin case in the checked luggage as it was a full flight. Case came back damaged (unable to put the handle down) so will have to dispose of it. Seats were quite cramped with very little leg room, even for economy. This was the experience of both the outgoing and return flight. Cabin crew were ok and flight time was punctual.

Missed this flight due to the first AA flight delay

Missed connection from Philadelphia to London because flight from DC was seriously delayed. Was re-routed the next day (had to pay for hotel) to Zurich and was given a main cabin middle seat while I had paid for premium. Great job AA!!!

Original flight delayed several times and finally canceled at 2:30 in the morning. Staff at the gate was not very helpful in resolving problems or communicating why there were delays. I spent 34 hours at the airport before I could leave, they couldn't book me on another early flight even after canceling my original flight. Next flight available after my original flight was canceled was 22 hours later. I will never fly American Airlines again.

very very tight seats unfriendly crew who do not seem to care about the comfort of their passengers and do not know how to smile poor ground staff support at LHR and PHX

So uncomfortable to sit in the tiny space on a long, international. Food was rough. Please, less white flour and processed food.

Our flight was delayed 2.5 hrs due to plane being too hot! After 1.5 hrs, airline decided to use another plane but had to wait for gate, baggage transfer & beverage transfer. Anyone could tell after first half hour that another plane was required and although did not affect us many would miss connecting flights at Heathrow. I have found the stewards are not the friendliest in the industry and the food is questionable, even as I like airplane food normally, the best of the 2 flights was the yogurt & granola for breakfast.

The CX617 from HK to BKK was delayed more than 1.5 hours.

Terrible boarding , Business class seats are sub standard. As usual crew will miss your food too

Just get Economy Plus for international flights, so worth it the extra room, bigger seats…

Economy class has no legroom so if you have the money worth to upgrade! Food was absolutely horrible! The crew was super nice!!!!!

Very bed boarding, there was overbooked and make a lot of problems and noises

On my way from Chicago to London, I was seated next to a quite heavy passenger. I could barely move. BA should have ensured that overweight customers are placed in comfortable seats and not to penalize also other passengers because BA is not willing to accommodate these passengers and their needs. No respect at all.

The flight as far as timings go was excellent. Unfortunately we ended up sat with someone on a night flight who had been drinking alcohol before boarding and BA staff were happily serving him more alcohol. He was very drunk which made our flight uncomfortable and awkward. My partner had this person lying on him whilst asleep. Alcohol should be served minimally. If there had been an emergency this person would not have been in a fit state to act accordingly.

First time flying with BA and I will do it again. Staff at airport and on board were very nice and helpful

Wonderful service and very comfy in the bulkhead in Economy Plus! Delicious food.

The BA team at Sky Harbor is deplorable, full of unnecessary attitude and poor communication. It seems like every member of the team was looking at another to solve the problem, instead of taking agency to do so themselves. I saw no less than 6 altercations with the same gate agent where he threatened to revoke the passengers boarding pass for asking a wildly reasonable question, something as simple as where the cue to board was. I’ve complained to BA before but it seems this isn’t an issue for them, which is very disappointing

Boarding poor in London,ok in Chicago. Don’t like Heatrow/terminal5

It was very good. We got a late start by about an hour and a half. However I worked rather have that than crash. It was purely mechanical. They had our tickets ready when we came off the plane in London for the next leg. The only mishap was when we got to Lisbon my husbands luggage made or bit mine didn't. All was not lost because I did finally get it 2 days later. I was really pleased that they c made the effort.

Liked that my American Airlines status seamlessly transferred to BA so luggage check was free. Flights were on time, boarding quick. Wish they didn’t assign connecting gate so late at Heathrow.

Book cheap flights from St. Louis to London

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from St. Louis to London found on KAYAK in the last 72 hours.
7/9Tue
1 stop
16h 03mSTL-LGW
$234
9/11Wed
2 stops
32h 00mSTL-LGW
$299
10/15Tue
2 stopsAir Canada
17h 50mSTL-LHR
$424
7/9Tue
1 stopBritish Airways
13h 15mSTL-LHR
$508
7/27Sat
2 stopsUnited Airlines
36h 50mSTL-LHR
$528
7/9Tue
2 stopsBritish Airways
16h 23mSTL-LCY
$576
12/6Fri
1 stopAmerican Airlines
19h 55mSTL-LGW
$601
12/6Fri
2 stopsAmerican Airlines
12h 27mSTL-LGW
$605
6/27Thu
1 stopUnited Airlines
14h 35mSTL-LHR
$854
6/27Thu
2 stopsAir Canada
13h 30mSTL-LHR
$856

Search by stops

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Last minute flights from St. Louis to London

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from St. Louis to London that are departing in the next 10 days.
6/13Thu
multi-stop
29h 23mSTL-LGW
6/15Sat
multi-stop
23h 07mLGW-STL
$1,107
6/14Fri
multi-stop
37h 57mSTL-LGW
6/21Fri
multi-stop
26h 34mLGW-STL
$1,153
6/15Sat
multi-stopBritish Airways
21h 43mSTL-LHR
6/22Sat
multi-stopBritish Airways
28h 42mLHR-STL
$1,155
6/15Sat
multi-stopBritish Airways
10h 54mSTL-LHR
6/22Sat
multi-stopBritish Airways
14h 13mLHR-STL
$1,164
6/13Thu
multi-stop
32h 16mSTL-LGW
6/15Sat
multi-stop
23h 07mLGW-STL
$1,172
6/15Sat
multi-stopVirgin Atlantic
14h 40mSTL-LHR
6/22Sat
multi-stopVirgin Atlantic
17h 33mLHR-STL
$1,209
6/14Fri
multi-stop
32h 16mSTL-LGW
6/21Fri
multi-stop
26h 34mLGW-STL
$1,304
6/14Fri
multi-stopUnited Airlines
14h 25mSTL-LHR
6/21Fri
multi-stopUnited Airlines
18h 17mLHR-STL
$1,718
6/14Fri
multi-stopUnited Airlines
14h 25mSTL-LHR
6/23Sun
multi-stopUnited Airlines
13h 00mLHR-STL
$1,797
6/11Tue
multi-stopAmerican Airlines
10h 54mSTL-LHR
6/12Wed
multi-stopAmerican Airlines
13h 37mLHR-STL
$2,628

Search by stops

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Search by price

St. Louis - London Flights

Departure:

St. Louis (STL)United States

Return flight deals:

London - St. Louis

Cabin classes: