Find flights
Deals
Insights
When to book
FAQs & Tips
Airlines

STL - LON

Find cheap flights from St. Louis to London from $221

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 6/27. 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 6/5
Wed 6/12

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 42,830,901 times on KAYAK, and here is why:

Save 22% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Bundle and saveSave money when you bundle your flight + hotel.

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, Oct 8 - Tue, Oct 22
11:39 am - 10:00 amSTL-LGW
16h 21m1 stop
12:00 pm - 10:18 amLGW-STL
28h 18m1 stop
Sat, Sep 7 - Tue, Sep 17
5:55 am - 10:10 pmSTL-LHR
10h 15m1 stop
7:35 pm - 5:22 pmLHR-STL
27h 47m2 stops
$743British Airways
Find Deal
Tue, May 21 - Mon, May 27
5:03 pm - 7:40 amSTL-LHR
32h 37m1 stop
9:30 am - 9:05 pmLHR-STL
17h 35m1 stop
$749United Airlines
Find Deal
Sat, Aug 10 - Sat, Aug 31
4:51 pm - 12:20 pmSTL-LHR
13h 29m1 stop
8:30 am - 3:21 pmLHR-STL
12h 51m1 stop
$750United Airlines
Find Deal
Tue, May 21 - Thu, May 30
6:26 am - 10:10 pmSTL-LHR
9h 44m1 stop
7:15 pm - 3:32 pmLHR-STL
26h 17m2 stops
$753British Airways
Find Deal
Wed, Sep 18 - Mon, Sep 30
11:08 am - 7:30 amSTL-LHR
14h 22m1 stop
9:15 am - 5:17 pmLHR-STL
14h 02m1 stop
$786American Airlines
Find Deal
Tue, Oct 8 - Wed, Oct 16
7:56 pm - 2:25 pmSTL-LHR
12h 29m1 stop
12:15 pm - 11:20 pmLHR-STL
17h 05m1 stop
$787American Airlines
Find Deal
Wed, Sep 25 - Tue, Oct 8
2:05 pm - 10:00 amSTL-LGW
13h 55m2 stops
12:00 pm - 11:35 pmLGW-STL
17h 35m2 stops
$790Virgin Atlantic
Find Deal
Sat, Sep 7 - Tue, Sep 17
6:15 am - 7:15 amSTL-LHR
19h 00m1 stop
9:20 am - 9:36 pmLHR-STL
18h 16m1 stop
$876Virgin Atlantic
Find Deal
Wed, Jul 24 - Wed, Jul 31

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 Saturday, 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 $1,510 and $1,139 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, United Airlines offered the best one-way deal for that route, at $528. KAYAK users also found St. Louis to London round-trip flights on Delta from $740 and on British Airways from $743.

Good to know

Low season

February

High season

March

Cheapest flight

$221
Best time to beat the crowds with an average 24% drop in price.
Most popular time to fly and prices are also 9% lower on average.
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 $221 for a one-way ticket and $522 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, SkyTeam, and oneworld are the airline alliances operating flights between St. Louis and London, with oneworld 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 Virgin Atlantic?

    The two airlines most popular with KAYAK users for flights from St. Louis to London are Delta and Virgin Atlantic. With an average price for the route of $798 and an overall rating of 8.0, Delta is the most popular choice. Virgin Atlantic is also a great choice for the route, with an average price of $928 and an overall rating of 7.7.

  • 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 740 reviews
8.3Crew
7.7Entertainment
7.1Food
7.8Boarding
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.

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.

Should have video screens Plane audio was poor and without wired connection hard to understand crew. Should serve more than just cups of water and pretzels on six hour flight. Did not see crew rest of flight. Fix charging sockets to retain charging blocks.

I paid $380 for my one-way ticket from California to Minnesota. The fair did not include online check-in. I received instructions from their app to check in at a kiosk. At the kiosk, the boarding pass would not print until an actual person came to verify that I had a personal item and not a carry-on item, On the plane, the person next to me was drunk and allowed to continue to order alcohol. United is garbage I’d rather fly spirit.

The plane was dirty and the in seat air wasn't blowing as planes usually do.

Generally good but there wasn’t any staff available when my luggage didn’t appear at baggage claim in Fresno. It took about half an hour to locate a staff member to open up the locked room where it was being kept.

Do not like the feeling of being in the basic economy. Everyone should feel good no matter what.

All flights were on time and boarding was issue free

Terrible! The plane was old and you are required to connect your own device to their Wi-Fi rather than have entertainment options in the back of the seat in front of you. The Wi-Fi went out during the flight and there was only one plug for the devices every two seats. Three out of five surrounding my family did not work. The seats and spaces under them were so small I could not fit my backpack, which I’ve always brought on flights and fit before no problem. The crew were unpleasant and patronizing.

Great! The plane was decently sized and comfortable. The staff was nice and there was great in flight entertainment

Food was terrible Not many options Stewards dont care Delay

Water service would be great. The way they board is terrible. Slow passengers first😂😂 They need to smart up a bit

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

We missed the flight to Barcelona because the flight from Baltimore was delayed. We flew on Vueling VW6653. Our luggage didn’t arrive. Please help us get our luggage. We are staying at Hotel Gran Via in Barcelona

The seats were tiny, being of a fairly petite build, I don’t usually expect to feel crammed and cramped in a seat, but I definitely was on this flight. I couldn’t even bend over to get anything out from under the seat in front and getting up to go to the bathroom at night with the seat backs reclined was nearly impossible. I had to do gymnastics to get over and out. For an airline that does long flights overnight, it’s kind of ridiculous.

In economy and food was ok, but with limited leg space (and I was in a 2 seat configuration) it was difficult to eat with a tiny seat tray. I spilt wine on my trousers. First time on British Air (I usually fly Turkish Air) and in a 777. Heathrow was pleasant but changing terminals awkward.

Starting with the flight Cairo to London the plain was so poor no entertainment at all uncomfortable seats although it’s 5 hours long,then an American airline plain took me from London to Miami it was a bad experience the crew most of flight time not available and they asked us to help our selves for any snacks if we need. From Miami to London actually was perfect flight with a huge plain and perfect crew but from London to Cairo was horrible plain with stiff fixed seats not movable no entertainment or wi fi very poor Menu which is unacceptable for a business class

I've done hundreds of flights in my life, and this flight was one of the best I've ever taken, From beginning to end, everything went smoothly, professionally, and with a smile and friendly attitude from all employees I interacted with. The food was delicious (and free), as were the drinks. There was just a genial and effective way in the way that British Airways organized the flight -that reminded of days in the 70's, 80's, and 90's, when flying was a fun, and exciting adventure. I enjoyed and had confidence in the abilities of the flight crew, I'll be flying British Airways several more times this summer. Thank you so much for the great experience! Cheryl Olso

Terrible! I missed my flight to my final destination and British airlines and American Airlines keep pointing fingers on each other’s. Nobody wants to take responsibility

Overall, terrific service, accommodations, and experience. Only reason comfort was rated lower was because it was difficult to keep a comfortable sleeping position for the overnight flight, but I also had an economy seat.

Very cramped seats in economy, difficult to get comfortable with your legs and feet and back. The seat width is ok but I’m average size. Food is HORRIBLE. Crew is friendly. Delays and very tight connections made it tough for navigating. We would have missed our connecting flight if it wasn’t delayed too. The terminal transit was slow and normally every 10 minutes before 8pm, after 8 pm is every 30 minutes!!!!! No free wine or drinks!! Below average attitude.

Leg room was better than expected. Lavatory’s were easy to access.crew was grea!

Horrible seat allocation. Boarding was slow. Food was average and so was entertainment. The TV terminal didn't work and so had to use remote.

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.
6/27Thu
1 stop
31h 48mSTL-LGW
$221
9/1Sun
1 stop
33h 18mSTL-LGW
$308
9/9Mon
1 stopUnited Airlines
16h 00mSTL-LHR
$528
9/9Mon
2 stopsUnited Airlines
13h 35mSTL-LHR
$532
9/1Sun
1 stopAir Canada
16h 00mSTL-LHR
$544
8/3Sat
1 stopAir Canada
32h 30mSTL-LHR
$550
6/12Wed
2 stopsAmerican Airlines
18h 30mSTL-LHR
$891
8/3Sat
2 stopsAmerican Airlines
19h 09mSTL-LHR
$1,327
9/9Mon
1 stopBritish Airways
10h 44mSTL-LHR
$1,332
5/12Sun
2 stopsBritish Airways
22h 11mSTL-LHR
$1,794

Search by stops

Search by airline

Search by price

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.
5/8Wed
multi-stopAir Canada
13h 30mSTL-LHR
5/22Wed
multi-stopAir Canada
30h 31mLHR-STL
$756
5/8Wed
multi-stopAir Canada
19h 55mSTL-LHR
5/22Wed
multi-stopAir Canada
30h 31mLHR-STL
$761
5/8Wed
multi-stopLufthansa
25h 25mSTL-LCY
5/22Wed
multi-stopLufthansa
28h 41mLCY-STL
$846
5/8Wed
multi-stop
41h 19mSTL-LGW
5/10Fri
multi-stop
26h 28mLGW-STL
$876
5/8Wed
multi-stopUnited Airlines
23h 45mSTL-LHR
5/22Wed
multi-stopUnited Airlines
29h 31mLHR-STL
$1,181
5/9Thu
multi-stopVirgin Atlantic
19h 04mSTL-LHR
5/16Thu
multi-stopVirgin Atlantic
16h 22mLHR-STL
$1,230
5/9Thu
multi-stopAmerican Airlines
16h 10mSTL-LHR
5/16Thu
multi-stopAmerican Airlines
16h 15mLHR-STL
$1,234
5/9Thu
multi-stopUnited Airlines
13h 35mSTL-LHR
5/16Thu
multi-stopUnited Airlines
15h 49mLHR-STL
$1,238
5/6Mon
multi-stopBritish Airways
34h 10mSTL-LCY
5/13Mon
multi-stopBritish Airways
28h 22mLCY-STL
$1,265
5/8Wed
multi-stopAmerican Airlines
10h 45mSTL-LHR
5/10Fri
multi-stopAmerican Airlines
17h 50mLHR-STL
$1,626

Search by stops

Search by airline

Search by price

St. Louis - London Flights

Departure:

St. Louis (STL)United States

Return flight deals:

London - St. Louis

Cabin classes: