SDF - LON

$221 Find Cheap Flights from Louisville 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 Louisville to London departing on 3/25. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to London

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Louisville to London, 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 Louisville to London, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$555
Typical prices: $824-$1,096
Lufthansa
sáb 1/10sáb 1/17
SDF - LHR • 1 stop
Cheapest one-way
$221
British Airways
qua 3/25
SDF - LHR • 1 stop
Top airlines
Scandinavian Airlines
Cheapest • from $598 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
2 weeks
in advance
Our data shows that travelers who book at least 2 weeks in advance save around 39% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
October
Cheapest • 30% price drop
April
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Louisville to London (SDF-LON)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Louisville 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 for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Louisville to London

sáb, jan 10 - sáb, jan 17
Lufthansa Logo
2:10 pm - 6:40 amSDF-LHR
11h 30m1 stop
Lufthansa Logo
7:40 am - 8:28 pmLHR-SDF
17h 48m2 stops
$555Lufthansa
Find Deal
sáb, jan 10 - sáb, jan 17
Lufthansa Logo
2:05 pm - 5:55 amSDF-LHR
10h 50m1 stop
Lufthansa Logo
7:40 am - 8:28 pmLHR-SDF
17h 48m2 stops
$558Lufthansa
Find Deal
qui, jan 8 - qui, jan 15
United Airlines Logo
11:10 am - 7:10 amSDF-LHR
15h 00m2 stops
United Airlines Logo
11:10 am - 10:30 pmLHR-SDF
16h 20m2 stops
$624United Airlines
Find Deal
sex, jan 9 - ter, jan 13
United Airlines Logo
9:50 am - 7:10 amSDF-LHR
16h 20m2 stops
United Airlines Logo
9:00 am - 8:28 pmLHR-SDF
16h 28m2 stops
$625United Airlines
Find Deal
qua, fev 4 - dom, fev 8
Delta Logo
12:22 pm - 7:15 amSDF-LCY
13h 53m2 stops
Delta Logo
1:45 pm - 6:13 pmLCY-SDF
33h 28m2 stops
$659Delta
Find Deal
qui, jan 8 - qui, jan 15
American Airlines Logo
1:15 pm - 9:00 amSDF-LGW
14h 45m2 stops
American Airlines Logo
11:20 am - 11:59 pmLGW-SDF
17h 39m2 stops
$742American Airlines
Find Deal
sáb, jan 10 - sáb, jan 17
Delta Logo
10:51 am - 1:15 pmSDF-LCY
21h 24m2 stops
Delta Logo
10:00 am - 11:55 pmLCY-SDF
18h 55m2 stops
$761Delta
Find Deal
sex, jan 23 - ter, jan 27
American Airlines Logo
8:07 am - 7:30 amSDF-LGW
18h 23m2 stops
American Airlines Logo
11:20 am - 6:31 pmLGW-SDF
36h 11m2 stops
$809American Airlines
Find Deal
seg, jan 5 - seg, jan 12
British Airways Logo
7:24 pm - 8:45 pmSDF-LCY
44h 21m2 stops
British Airways Logo
7:15 pm - 10:05 pmLCY-SDF
31h 50m2 stops
$1,040British Airways
Find Deal
ter, dez 16 - ter, dez 23
British Airways Logo
11:19 am - 10:50 amSDF-LGW
18h 31m2 stops
British Airways Logo
11:45 am - 3:59 pmLGW-SDF
57h 14m2 stops
$1,056British Airways
Find Deal
Booking Insights

KAYAK's insights & trends for Louisville to London flights

Get data-powered insights and trends into flights from Louisville to London to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Louisville to London?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Louisville to London departing in January.

What’s the cheapest day of the week to fly from Louisville to London?

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

For Louisville to London, Wednesday is the cheapest day to fly on average and Sunday is the most expensive. Flying from London back to Louisville, the best deals are generally found on Friday, with Tuesday being the most expensive.

What is the cheapest month to fly from Louisville to London?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Louisville 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 Louisville to London is October, where tickets cost $699 (return) on average. On the other hand, the most expensive months are December and June, where the average cost of round-trip tickets is $1,472 and $1,320 respectively.

How far in advance should I book a flight from Louisville to London?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Louisville to London, 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 Louisville to London, you should book around 2 weeks before departure, which saves you about 39% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 5 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$221
Best time to beat the crowds but there is an average 21% increase in price.
Most popular time to fly and prices are also 16% lower on average.
Flight from Louisville to London

When to book flights from Louisville to London

Are your dates flexible? Find out the best times to travel from Louisville 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 Louisville to London

  • Will I pay extra for pre-selecting a seat when flying from Louisville International Airport, Kentucky, to London?

    Virgin Atlantic allows you to select a seat from a seat map. Gold and Silver members can choose any standard seat when booking SDF-LHR flights without a charge. The seat assignment is usually done at check-in unless you're traveling in the Economy Light cabin, in which case you'll pay a small fee for pre-selection.

  • Will my child get a reduced ticket price from Louisville International Airport (SDF) to London?

    All children aged 0 to 23 months sit on adult laps throughout the flight. Older kids up to age 12 are charged less by KLM Airlines. So, when booking your flight through KAYAK, indicate your child's age to see an automatic fare reduction.

  • Are there airlines with fully flat beds on this route?

    The Business class cabin by British Airways has lie-flat seats. With a Club World ticket, you'll enjoy flying in a seat that extends into a flatbed (6 feet long). These seats have lumbar support and a fully adjustable headrest. You may request bedding for added comfort.

  • Can I travel to London with other animals besides cats and dogs?

    Always check the airline's pet policy before planning a trip with any animal. Iberia Airlines allows pets in the passenger cabin (18lb or less, including the cage), in the hold as extra baggage, or cargo compartment. You may bring a cat, dog, tortoise, fish, and bird accompanied by the correct documents. They, however, do not permit dangerous breeds and brachycephalic animals.

  • What is the cheapest flight from Louisville to London?

    In the last 3 days, the lowest price for a flight from Louisville to London was $221 for a one-way ticket and $558 for a round-trip.

  • Do I need a passport to fly between Louisville and London?

    Yes

  • Which airports will I be using when flying from Louisville to London?

    On your way to London, you’ll fly out from Louisville Intl. You’ll be landing in one of London’s 2 airports: London Gatwick or London Heathrow.

  • Which aircraft models fly most regularly from Louisville to London?

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

  • Which airline alliances offer flights from Louisville to London?

    Star Alliance, SkyTeam, and oneworld are the airline alliances operating flights between Louisville and London, with Star Alliance being the most commonly used for this route.

  • Which is the best airline for flights from Louisville to London, Delta or Virgin Atlantic?

    The two airlines most popular with KAYAK users for flights from Louisville to London are Delta and Virgin Atlantic. With an average price for the route of $918 and an overall rating of 7.9, Delta is the most popular choice. Virgin Atlantic is also a great choice for the route, with an average price of $898 and an overall rating of 7.5.

  • How does KAYAK find such low prices on flights from Louisville 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 Louisville to London.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Louisville to London?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London from Louisville 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 Louisville 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 Louisville with another airline.

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

KAYAK’s top tips for finding a cheap flight from Louisville to London

  • Most carriers operating flights from Louisville International Airport (SDF) to London Heathrow (LHR) have a single stopover. American Airlines stop at Boston Logan (BOS), O'Hare Intl Airport (ORD), or Charlotte Douglas Airport (CLT), while United connects via Dulles Airport (IAD). If you wish to land at London Gatwick (LGW), you might have two stopovers at Atlanta Airport (ATL) and John F. Kennedy Airport (JFK).
  • Suppose your physique prevents you from sitting in a single seat. You can get more personal space for better comfort while on the route SDF-IAD-FRA-LCY, often operated by Lufthansa. Consider reserving an empty adjacent seat with the airline. However, you can only pay the extra fee at the check-in counter on your departure date.
  • You only need a visa to fly to London if you plan to stay in the United Kingdom for over six months. You'll get a visa vignette or sticker on your passport at the airport's immigration office. To extend your business trip or vacation for another six months, complete the UK visa renewal form, pay the applicable fees, and book an appointment at any UKVCAS office for biometrics.
  • British Airways is one of the best airlines for wheelchair users. If you have a mobility issue, you can specify the type of assistance you need when booking your flight. Special assistance includes basic wheelchair assistance and full-service- luggage storage and retrieval, boarding and alighting the aircraft, and chair aid to move around the cabin.
  • Children through age 17 are automatically subject to unaccompanied minor protocols, and the standard unaccompanied minor fee is charged where applicable. With United Airlines, the service is available for kids between 5 and 14 and is optional for the age bracket 15-17. When booking tickets for kids traveling alone, inform the airline who will drop them off at SDF and pick them up from the arrival airport in London.

Reviews of the top 5 airlines serving from Louisville to London

 
See real verified KAYAK customer reviews for airlines flying from Louisville 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 Louisville 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.
7.9
DeltaOverall score based on 7998 reviews
8.1Boarding
7.9Comfort
8.5Crew
7.3Food
7.9Entertainment
Airline reviews

First, Delta needs more flights to/from Miami. Second, a 1000pm leaving at 1230pm is unacceptable from their biggest airport world hub. Another aircraft could have been used such as the aircraft scheduled to be used in the morning for that exact same route. Yes, I did get me there but the lack of sleep the next day didn't help me enjoy my entire trip since I was busy with activities during the weekend. This can be and is expected from Spirit (going bankrupt) and Frontier (despite they're nickel and dimers). But from Delta's World Hub? That's totally unacceptable!

2.0 MediocreAnonymous, Nov 2025ATL - TPA
Read more Delta reviews

First, Delta needs more flights to/from Miami. Second, a 1000pm leaving at 1230pm is unacceptable from their biggest airport world hub. Another aircraft could have been used such as the aircraft scheduled to be used in the morning for that exact same route. Yes, I did get me there but the lack of sleep the next day didn't help me enjoy my entire trip since I was busy with activities during the weekend. This can be and is expected from Spirit (going bankrupt) and Frontier (despite they're nickel and dimers). But from Delta's World Hub? That's totally unacceptable!

This flight was straightforward and without difficulty. Service was OK, but I continue to be underwhelmed by level of attention given to Sky Priority passengers.

It would’ve been nice for all that money to have a more substantial snack for free. I remember once upon a time getting a very nice turkey sandwich with Swiss cheese on whole wheat bread for no charge along with a drink. I guess those days are gone. it’s a little insulting being given a cookie or a bag of baked chips Going forward I’ll just bring my own.

Great. Seamless. Check in agent at kiosk international was amazing and extremely helpful.

Our flight from SFO to MSP was right on time on 11/15/2025. No delays. As we approached MSP at about 8 pm, we circled in the air until 8:40 pm so I don't call that efficient for MSP. I think the captain should announce the delay and why. (as if we all don't know that we are just circling around the area, slowing down, speeding up, slowing down.) Thank you. Marilyn Fischer

Service in business class was not impressive. I ordered coffee with dinner and then watched other people get 2 refills before I got my 1 cup of coffee, and only after I pressed the attendant button overhead. Furthermore, the seats in the forward cabin need maintenance on this 737-800: the upholstery is detaching from the seat frame, at least on the backs of seats 1C, 1D.

Plenty of leg room, temperature was great and staff was excellent. Would do it more often.

The ticket agents in West Palm Beach on Friday afternoon Nov. 7th were incredible in getting us on an earlier plane to Atlanta during the government shutdown. Had the taken our original flight we would have missed our connection. She did this on her own, We didn't even have to ask, and she did it all with a smile and showing genuine concern that we would be taken care of. We are very grateful and thankful. We fly often, and now we will be sure to fly Delta.

Flight delayed then cancelled. Misplaced luggage. Still do not have. Rented car 1100 mile drive. I had to buy some overnight Hotels clothes toiletries gas food at my expense. Still not home. Not sure where luggage is. Over 4 hours on hold to Felta

I truly love flying with Delta. They have always treated me with the upmost respect

Food has been disappointing in both legs of flight to india

Great staff great experience, made a 2 hour delay very bearable

Great staff, great experience, made a 2 hour delay very bearable

Food was the worst I’ve had on a VA flight. Normally it’s a lot better

I was my pleasure to fly virgin on my birthday for my first solo trip ever 🫶🏼

These are one of the older seat arrangements facing away from the windows! Not particularly convenient sets. No storage spaces. NO COAT HANGING HOOKS. Inconvenient business class seat compared to any other airlines of similar class. Staff are excellent! Extremely professional, friendly. Food is good too.

Overall, flight was excellent but check in was very slow for Premium Economy. Economy queue was shorter but we weren't allowed to use it.

The staff was not very polite but the flight was very very nice and comfortable and the entertainment was great

Great crew - old style upper class seats on the older fleet now feels dated

Premium economy more comfortable than economy, but not by much. Did was awful, do not try the omelette. Flight crew were helpful. Flight was delayed by over an hour. Overall but bad, arrived safely and thank God.

from SFO-> FRA flight, AVML meal was significantly less compared to regular meal, especially no Desert, no Bread, no sides.

Very nice flight love the small aircraft. We had a wonderful flight attendant. Nice to see someone that really enjoys her job. Don't have her name but had a southern accent.

This was an older airplane. The cabin was constantly warm to hot throughout the 10 hour flight and there were no vents to personalize air flow. Also since it was an older plane, the material and comfort of the chairs were very uncomfortable. I left my flight with major soreness on my tailbone.

Very thoughtful flight attendant offered me water immediately since I had run to make my connection.

Door to door, the crew and staff were amazing. It was a stressful travel day with delays, but they were focused on customers and doing what they could to get us to our destinations.

Even though we were delayed, we were able to make our connection

Seats in waiting area and on plane hard as rock. Fast internet on the flight was great! Crew was kind.

Starlink wifi on the Embraer E175 is an excellent experience. I was able to connect and work from IAD all the way to approach into BTV.

Older aircraft, no meal, only food was for purchase. Not impressed United.

United needs to step up their game. Delayed flight leaving Seattle, San Francisco. Older aircraft, not very comfortable.

Disliked having to wait a little longer to disembark from the plan when we landed in London

Food should be better quality. Video screens have poor resolution and the library of movies is poor. The other airlines are much better.

The trip was smooth but the crew were very abrupt, snatching things before finished and being quite snappy when asked questions.

My wife and I love to travel, so we fly a lot. We've already logged 381,075 miles and with practically every major airline. But this flight was very disappointing. It started off well, with no delays and a new plane. But when lunchtime approached, all that good impression was ruined. Instead of white tablecloths, we were offered small, dark placemats, which, as it turned out, were perfectly adequate for the food. All the food offered—and my wife and I only took fish, and the meat—was not just bad, it was downright disgusting and not heated enough. The same applies to the appetizers. This was the first time in many years of traveling that we've been offered such disgusting food.

Lost luggage stuck no clothes and no word after 2 days leaving on cruise no stuff or clothes

Don’t know they cancelled the flight day before I was to leave. They sent a email at 9:00 pm at night saying they cancelled. That is the smooth way to say we don’t want your business! I think they didn’t have enough people booking so they cancelled the flight! It’s all about the money anymore there is no honesty in business.

The flight was canceled 3 hours after original take off time

Pathetic check in experience at JFK. Everything is self check in. Not enough staff present to help with when the check in process or the kiosk gets stuck. Staff present not welcoming or pleasant at all. On the other hand the NY based flight crew was great. Courteous and friendly throughout the flight. Special meals leave a lot to be desired. Kids meals should be made available when kids are flying and same goes for special kids meals too.

The AA app really sucks ... Every flight & connecting flights were delayed over 30 mins. One connecting flight on American Eagle said it was delayed in its arrival ... when it was actually parked across from the gate for over 1 hr before they pulled it to the gate. Seats in the economy/ main cabin are packed together like sardines ... no leg room.

Flight was full, and would have preferred an aisle seat, but due to getting a late ticket ,the seat I had was adequate. The flight crew were very help full and hard working. Food and drink were excellent for the 11hr flight. Overall I was pleased with flight, and would recommend British Airways again.

Smooth trip no turbulence which is always a bonus for me lol! In cattle class so an element of being a bit squished (but not as bad as other shorter haul airlines) smaller plane than the one we flew out on and entertainment system wasn’t as modern but still definitely passed the time. Lovely crew x

Flying on the Boeing 787 from Seattle to London was everything that I expected. Every thing was great.

Seat pitch is not enough to eat comfortably. When seat in front is reclined, your screen comes closer to your face. Ryanair seats are actually more comfortable.

The leg from Portland to Heathrow was great for a business class ticket. The BA leg from Heathrow to Lisbon was terrible. Basically coach seating with an empty seat between you and next passenger. Absolutely no leg room. Should not have been charged for business class and it was a 3 hour flight.

The flat beds. Other than that, the place was not clean.

Moved me away from my family and refused to fix it.

I have always been pleased with their service. Would not change a thing

Seating and food was the worst we have experienced in 35 years of traveling for both personal and busines .

Economy seats felt more cramped than other flights we have taken.7 hr, painful sitting hours 6 and 7. Web site difficult to deal with. Originally put in for 1 special meal due to type 2. Meal was awful. Tried to change selection to standard for return flight, on app and website, unable to complete that action.

I was sleeping during dinner service, no one bothered to offer meal later, I remained hungry….until I got a morning sandwich!

Everything you need to know for your flight from Louisville to London

Information on your arrival and departure airports