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STL - LON

$348 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 8/21. 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
Sat 6/22
Sat 6/29

Search hundreds of travel sites at once for deals on flights 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.
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 43,800,826 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
2:35 pm - 10:00 amSTL-LGW
13h 25m1 stop
12:00 pm - 10:46 amLGW-STL
28h 46m1 stop
Tue, Sep 10 - Tue, Sep 17
7:48 pm - 10:00 amSTL-LGW
32h 12m1 stop
12:00 pm - 10:46 amLGW-STL
28h 46m1 stop
Thu, Oct 3 - Tue, Oct 8
7:37 am - 8:35 amSTL-LGW
18h 58m2 stops
3:05 pm - 11:20 pmLGW-STL
14h 15m2 stops
$719American Airlines
Find Deal
Tue, Sep 17 - Tue, Oct 1
6:15 am - 11:35 amSTL-LHR
23h 20m1 stop
12:05 pm - 3:20 pmLHR-STL
33h 15m1 stop
$739United Airlines
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Sun, Sep 15 - Thu, Sep 26
8:50 am - 7:40 amSTL-LHR
16h 50m1 stop
7:25 am - 5:11 pmLHR-STL
15h 46m2 stops
$740United Airlines
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Tue, Sep 10 - Tue, Sep 17
9:09 am - 7:30 amSTL-LHR
16h 21m1 stop
10:30 am - 7:01 pmLHR-STL
14h 31m1 stop
$756American Airlines
Find Deal
Tue, Aug 6 - Tue, Aug 20
4:23 pm - 10:10 pmSTL-LHR
23h 47m1 stop
10:05 am - 5:47 pmLHR-STL
13h 42m1 stop
$764British Airways
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Sat, Aug 10 - Sat, Aug 31
4:22 pm - 9:05 amSTL-LHR
10h 43m1 stop
7:35 pm - 5:17 pmLHR-STL
27h 42m2 stops
$774British Airways
Find Deal
Tue, Aug 13 - Mon, Aug 19
11:25 am - 8:05 amSTL-LHR
14h 40m2 stops
12:10 pm - 8:37 pmLHR-STL
14h 27m1 stop
$864Virgin Atlantic
Find Deal
Mon, Jun 10 - Wed, Jun 26
1:06 pm - 10:00 amSTL-LHR
14h 54m2 stops
3:55 pm - 11:43 pmLHR-STL
13h 48m1 stop
$865Virgin Atlantic
Find Deal
Mon, Jun 10 - Wed, Jun 26

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 Sunday, 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 $718 on average. On the other hand, the most expensive months are June and July, where the average cost of tickets is $1,466 and $1,112 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, Virgin Atlantic offered the best one-way deal for that route, at $532. KAYAK users also found St. Louis to London round-trip flights on American Airlines from $719 and on Delta from $722.

Good to know

Low season

February

High season

July

Cheapest flight

$348
Best time to beat the crowds with an average 23% drop in price.
Most popular time to fly with an average 19% 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 $348 for a one-way ticket and $491 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?

    SkyTeam, oneworld, and Star Alliance are the airline alliances operating flights between St. Louis and London, with SkyTeam 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 $798 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.
7.7
Virgin AtlanticOverall score based on 728 reviews
7.1Food
7.4Comfort
7.7Entertainment
8.3Crew
7.8Boarding
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.

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

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.

From the start everything was perfectly fine. First meal was fantastic. Breakfast needs a lot of work and food was overcooked and not very nice for breakfast. Staff were fantastic friendly nice they came round and check we need anything else to eat or drink

From the start everything was perfectly fine. First meal was fantastic. Breakfast needs a lot of work and food was overcooked and not very nice for breakfast. Staff for a fantastic friendly nice we came round and check we need anything else to eat or drink

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

Food could have been better especially the breakfast. Overall it was a good flight

I have used Air France and KLM many times it will help if they change their menu's feel like it's been the same for years!!!, Especially the breakfast. Overall the flight was good and enjoyable.

Backpack should NOT allowed put in the flight bin , only put it under the seat. I can't find space put my carry on luggage!!! and I pay for it ! that was very bad experience

Fantastic. Smooth boarding with an infant. Never experienced it with any other carriers.

This was a flight operated by Lufthansa. See me prior comments, which were meant for this experience. The CSA, Ashley, should be reprimanded if not fired for incompetence, being rude, and very, very slow. She was whispering to other CSAs, blaming my flight change on others, unable to give me a seat assignment, telling me could not help without offering any advice (I travel 200,000 miles a year and am a consultant to the airlines, so I know how this gets done PRETTY DAMN WELL). Then, she gave me literally the worst seat on the airline (yes, there were other seats open) - the one right next to the bathroom that was so bad the other PAX next to me left to move to another seat. My seat kept getting rammed (3x) by the crew with their carts (no turbulence to speak of), other passengers grabbing the seat to get in or out of the bathroom, and listening to the bathroom flush all night.

This was a Lufthansa flight, not United. The CSA at the counter, Ashley, was not only incompetent, but quite rude. Me and two other PAX waited over 7 minutes standing in front of her and another CSA and they ignored us. We joked that we must have accidently taken invisibility pills. She could have at least said "I'll be with you in a moment, I'm currently....". I could go on about how rude she and the other CSAs were (whispering, not communicating with me, blaming the situation on others, etc.). She would not work for me. Then, she gave me literally the worst seat on the plane. the worst. My seat kept getting bumped (rammed twice by the crew with their carts and about every 5 minutes by someone using the bathroom), listening to the bathroom all night, crowded seat, etc.

My seat was broken. WiFi didn’t work. Gate crew at HOU were rude and condescending. Treated all the passengers badly. Bad experience, United.

First flight of the day… MINIMUM FUEL! 15 minute landing delay at HOU due to fog turned into a 2+ hour delay! Rather than circle, they had to divert to another city to refuel! Sat on tarmac at Austin to refuel. We ALL missed our connections! The crew, including pilots, were clueless. Crew was really a mess. At HOU, Untied employees were exceedingly rude to all. It was pitiful.

Food wasn’t very good, old business seating configuration on an old A340

An hour and a half late is UNACCEPTABLE. The negative impact to our family is unconscionable. And for the price we were forced to pay...

Standard flight experience, but there is only power at the seat to row 20 on the aircraft, on my initial check in it did not say that was the case

Not a fan of the diagonal partially enclosed business class seats or how they have to be converted to beds manually by crew. I prefer more isolation and user control for switching to lie flat.

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…

American Airlines continues to price it can provide the least comfortable passenger experience in the air. This legacy carrier rivals the budgets for both terrible seats and inadequate amenities. I am a 5’7” woman who is not wider than a coach seat (even on these narrow bodied aircraft). My 3.5 hour flight was terribly uncomfortable because the leg room is inadequate (my knees hit the seat on front of me even when it was not reclined); the seat barely reclines; and the foam padding is worn thin to the extent one can feel the metal supports of the seat. Add to this the fact that the aisle is super narrow, so that the drink cart literally scrapes the arm rest of the aisle seat. It’s basically torture.

The return trip was a customer service disaster. American Airlines needs an overhaul of how they treat their customers.

Was flying in premium eco and there were around 5-6 movies I wanted to watch and none of those could I play for some reasons. Not just me we checked w the person sitting next to me. Few of the movies were only playable :( Also that was not great that we couldn't upgrade to business however tried to, many times before the flight :(

You cancelled my flight by email then made it very difficult to get in contact with you. Then put me in a flight with a long layover in Mexico returning to the wrong airport in uk. Mind blowing my stressful. I missed see my grand dad because of you.

This was not the BA business class it used to be. Mediocre food, attendants seemed stretched thin. All the little luxuries that used to make BA business fun were missing. Flight delayed and the explanation given was they forgot to pick up crew - I hope I misheard! Transfer in LHR “sticky” - we thought we had way too much time at 3hours but it was needed. Next time will try different route.

Always getting updates by email very easy to check in on line. There was plenty of checking in staff to get you all through. It was nice that the flight attendants took time to talk to you and were interested in your holiday.

Flight from Phoenix to London was very quiet. Excellent space available for comfort, couldn't fault

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.

The entire process was flawless and as expected flying first class. The only thing that I have a complaint on...when first boarding, the plane was EXTREMELY cold; then when we were trying to sleep, it was way too hot - just better regulating (especially trying to sleep) would have made it perfect.

- OK plane. Basic accommodations. OK food. The digital window shade wasn't working.

- OK plane. Basic accommodations. OK food. The digital window shade wasn't working. - Expect to be woken up more than an hour before landing when they start dinging the bell and making announcements and turning on all cabin lights to serve a snack. I would prefer they remain quiet and only serve people who want to wake up.

Better food and more space in the seats. Also when doing the web check in both times I was going in to your site the minute you open it and there is not really many seats to choose only to buy!!!

It was ok, not as good as it used to be. The Heathrow connection was a disaster - complete anarchy, unknowledgable and skimpy assistance and signage. Gate crew at next flight was great, held the flight while my wife struggled through security.

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.
8/21Wed
2 stops
41h 19mSTL-LGW
$348
9/11Wed
3 stops
36h 09mSTL-STN
$454
8/21Wed
3 stops
17h 40mSTL-LHR
$464
8/21Wed
3 stops
17h 30mSTL-LGW
$464
8/21Wed
1 stopVirgin Atlantic
18h 45mSTL-LHR
$532
8/21Wed
2 stopsAmerican Airlines
15h 46mSTL-LHR
$543
7/10Wed
2 stopsAmerican Airlines
14h 57mSTL-LHR
$547
7/27Sat
2 stopsUnited Airlines
34h 10mSTL-LHR
$569
8/21Wed
2 stopsVirgin Atlantic
15h 39mSTL-LCY
$582
10/1Tue
1 stopBritish Airways
10h 48mSTL-LHR
$2,866

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.
5/23Thu
multi-stopAmerican Airlines
13h 37mSTL-LHR
5/30Thu
multi-stopAmerican Airlines
13h 15mLHR-STL
$876
5/23Thu
multi-stopVirgin Atlantic
21h 49mSTL-LHR
5/30Thu
multi-stopVirgin Atlantic
13h 26mLHR-STL
$882
5/24Fri
multi-stopBritish Airways
10h 15mSTL-LHR
5/29Wed
multi-stopBritish Airways
21h 02mLHR-STL
$898
5/24Fri
multi-stopAmerican Airlines
14h 28mSTL-LHR
6/2Sun
multi-stopAmerican Airlines
16h 15mLHR-STL
$926
5/23Thu
multi-stop
22h 50mSTL-LHR
5/30Thu
multi-stop
33h 05mLHR-STL
$1,017
5/24Fri
multi-stopAmerican Airlines
12h 20mSTL-LHR
5/29Wed
multi-stopAmerican Airlines
15h 45mLHR-STL
$1,079
5/23Thu
multi-stopAir Canada
14h 40mSTL-LHR
5/30Thu
multi-stopAir Canada
16h 31mLHR-STL
$1,256
5/24Fri
multi-stopDelta
18h 25mSTL-LHR
5/27Mon
multi-stopDelta
17h 39mLHR-STL
$1,305
5/24Fri
multi-stopDelta
13h 15mSTL-LHR
5/27Mon
multi-stopDelta
17h 45mLHR-STL
$1,309
5/26Sun
multi-stopBritish Airways
39h 41mSTL-LGW
5/28Tue
multi-stopBritish Airways
29h 06mLGW-STL
$1,758

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St. Louis - London Flights

Departure:

St. Louis (STL)United States

Return flight deals:

London - St. Louis

Cabin classes: