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$319+ Cheap flights from Louisville (SDF) to London (LON)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/2. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — LON
Nov 26 — Dec 31
Wed 11/26
Wed 12/3
1 adult, Economy
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Find cheap flights from Louisville to London with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

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3. Compare prices and book

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Cheapflights Tip: The best prices from Louisville Intl to London are usually found in August or September, booked 10 days in advance, depart on a Wednesday or Tuesday and return on a Thursday

Find flight deals from Louisville to London

Cheapest flights from Louisville to London
Explore the most affordable flight options available from Louisville to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 27, 2025.

This Rumbo deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Rumbo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/278:15 pmSDF - LHR
1 stop11h 25mVirgin Atlantic
Tue 11/1110:45 amLHR - SDF
1 stop13h 27mVirgin Atlantic
Deal found 10/26$574
This KLM deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/273:11 pmSDF - LHR
1 stop12h 39mKLM
Tue 11/1111:45 amLHR - SDF
2 stops14h 29mKLM
Deal found 10/26$585
This Air France deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/278:15 pmSDF - LHR
1 stop11h 25mAir France
Tue 11/118:55 amLHR - SDF
1 stop15h 17mAir France
Deal found 10/26$592
This KLM deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/283:11 pmSDF - LHR
1 stop12h 39mKLM
Wed 11/511:45 amLHR - SDF
2 stops14h 30mKLM
Deal found 10/27$593
This Delta deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/2712:54 pmSDF - LHR
2 stops15h 11mDelta
Tue 11/1111:30 amLHR - SDF
2 stops17h 36mDelta
Deal found 10/26$596
This Delta deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2810:30 amSDF - LHR
2 stops16h 35mDelta
Tue 11/410:00 amLHR - SDF
2 stops16h 15mDelta
Deal found 10/27$597
This Delta deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2912:39 pmSDF - LHR
1 stop14h 26mDelta
Fri 11/73:50 pmLHR - SDF
1 stop13h 11mDelta
Deal found 10/27$599
This United Airlines deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/912:20 pmSDF - LHR
2 stops13h 50mUnited Airlines
Tue 12/1611:10 amLHR - SDF
2 stops16h 19mUnited Airlines
Deal found 10/25$619
This United Airlines deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/259:55 amSDF - LHR
2 stops16h 15mUnited Airlines
Tue 12/96:50 amLHR - SDF
2 stops15h 26mUnited Airlines
Deal found 10/27$620
This Delta deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/96:16 pmSDF - LHR
1 stop12h 24mDelta
Mon 12/156:30 amLHR - SDF
2 stops17h 22mDelta
Deal found 10/26$621
This Cheapflightsfares deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/291:07 pmSDF - LCY
2 stops15h 58mLufthansa
Fri 11/79:55 amLCY - SDF
2 stops18h 59mLufthansa
Deal found 10/27$664
This United Airlines deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/32:02 pmSDF - LCY
2 stops17h 53mMultiple Airlines
Mon 11/106:15 pmLCY - SDF
2 stops30h 12mMultiple Airlines
Deal found 10/27$683

Cheap flight deals from Louisville to London

Discover tips and strategies to find the most affordable flight options for your journey from Louisville (SDF) to London (LON). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated October 27, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$592
(Delta)

One-way from

$319
(Kiwi.com)

Popular in

June

Cheapest in

August

Average price

$787
Provider with most accurate pricing for Louisville Intl-London (LON) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Louisville Intl-London (LON) flights.
Search Deals
From Louisville Intl to London (LON)
Search Deals
One-way flight from Louisville Intl to London (LON)
Search Deals
Highest demand for flights based on searches. 17% potential increase in price ($207 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($33 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Louisville to London that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 27, 2025.
Use the filters below to find and compare flights from Louisville to London that are best for you.

Fly from

Louisville

Fly to

London

Route

Depart

Return

Price

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Tue 11/25

10:37 am-7:50 am

1 stop16h 13m

London Heathrow

Tue 12/9

6:20 am-5:36 pm

2 stops16h 16m

$592

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Tue 12/9

6:35 am-7:05 am

1 stop19h 30m

London Heathrow

Tue 12/16

6:30 am-5:36 pm

2 stops16h 06m

$593

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Tue 11/25

3:09 pm-9:00 am

1 stop12h 51m

London Heathrow

Tue 12/9

11:05 am-6:45 pm

1 stop12h 40m

$599

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Tue 12/9

2:29 pm-8:45 am

1 stop13h 16m

London Heathrow

Tue 12/16

11:05 am-6:45 pm

1 stop12h 40m

$599

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 12/10

10:37 am-7:50 am

1 stop16h 13m

London Heathrow

Wed 12/17

1:05 pm-11:59 pm

2 stops15h 54m

$604

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Tue 12/9

12:20 pm-7:10 am

2 stops13h 50m

London Heathrow

Tue 12/16

11:10 am-10:29 pm

2 stops16h 19m

$619

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Tue 11/25

9:55 am-7:10 am

2 stops16h 15m

London Heathrow

Tue 12/9

6:50 am-5:16 pm

2 stops15h 26m

$620

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Tue 12/9

6:16 pm-11:40 am

1 stop12h 24m

London Heathrow

Mon 12/15

6:30 am-6:52 pm

2 stops17h 22m

$621

LouisvilleLondon

SDF - LGW

SDFLGW

Louisville Intl

Fri 1/9

6:00 am-10:00 am

1 stop23h 00m

London Gatwick

Fri 1/16

2:00 pm-11:45 pm

1 stop14h 45m

$642

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Fri 11/7

8:17 am-6:25 am

1 stop17h 08m

London Heathrow

Fri 11/14

11:30 am-11:00 pm

2 stops16h 30m

$642

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/24

Showing 1-10 of 47 results
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Compare providers for flights from Louisville to London

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Louisville to London in October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Louisville-London flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Louisville-London flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Louisville-London flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Louisville-London flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Louisville-London flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Louisville to London

Have a flexible travel schedule? Discover the best time to fly to London from Louisville with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

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

Use this chart to determine the optimal time to book a round-trip flight from Louisville to London. Price data was last updated on October 24, 2025.

To ensure you get the cheapest price possible for a flight from Louisville to London, you should look to book at least 10 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Louisville to London?

Currently, November is the cheapest month in which you can book a flight from Louisville to London (average of $527). Flying from Louisville to London in June is currently the most expensive (average of $918). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SDF to LON?

Find hourly flight availability from Louisville to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 27, 2025.

It’s typically best to fly out from Louisville to London in the evening. Doing so could potentially save you 79% on the flight price compared to flying at noon, which is usually more expensive.

What’s the top layover airport for flights from Louisville to London?

Share of 1-stop round-trip flights from Louisville to London chosen by Cheapflights users in the past 12 months, using the same layover each way.

Atlanta (ATL) – chosen by Cheapflights users on 60% of 1-stop itineraries from Louisville to London on Cheapflights.

What’s the cheapest layover airport for flights from Louisville to London?

Average round-trip fare for 1-stop flights from Louisville to London, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Charlotte (CLT) is the most affordable 1-stop option, with an average round-trip price of $620.

What’s the fastest layover option from Louisville to London?

Shortest average travel time for 1-stop one-way flights from Louisville to London, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Charlotte (CLT) have the shortest average one-way travel time for 1-stop routes: 10h 13m.

Which airport typically offers the quickest layover for flights from Louisville to London?

Average layover duration for 1-stop one-way flights from Louisville to London, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Charlotte (CLT) offer the fastest connection on this route, with an average layover time of 1h 22m.

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to London. Reviews last updated October 27, 2025.
Read through reviews of airlines operating flights from Louisville to London, such as Delta, Virgin Atlantic, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
7,996 reviews

Food

7.3

Crew

8.5

Boarding

8.2

Overall

7.9

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Delta
7.9
Good
7,996 reviews
Delta
7.9
Good
7,996 reviews

Food

7.3

Crew

8.5

Boarding

8.2

Overall

7.9

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Virgin Atlantic
7.5
Good
670 reviews
Delta
7.9
Good
7,996 reviews

Food

7.3

Crew

8.5

Boarding

8.2

Overall

7.9

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
United Airlines
7.4
Good
8,999 reviews
Delta
7.9
Good
7,996 reviews

Food

7.3

Crew

8.5

Boarding

8.2

Overall

7.9

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
American Airlines
7.2
Good
11,031 reviews
Delta
7.9
Good
7,996 reviews

Food

7.3

Crew

8.5

Boarding

8.2

Overall

7.9

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
British Airways
6.7
Okay
7,476 reviews
Delta
7.9
Good
7,996 reviews

Food

7.3

Crew

8.5

Boarding

8.2

Overall

7.9

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.

Related info for your journey

Find useful and relevant information for your journey from Louisville to London. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Louisville to London?

    Louisville Intl (SDF) is the airport you will fly out of if you book a flight from Louisville to London. You should not have trouble finding flights to London from Louisville Intl; the airport handles an average of 0 outbound flights to London per day. You should also have plenty of airline options to choose from since 6 airlines have flights from the Louisville airport to London. It is only a 5.3 mi journey to Louisville Intl (SDF) from Louisville’s city center.

  • How long is the flight from Louisville to London?

    Departing from Louisville to London will take you 12h 51m. Airlines will cover a distance of 4033 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from Louisville to London round-trip?

    Currently priced at $574, KLM will fly you from Louisville to London and back. In addition to KLM, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from British Airways and Virgin Atlantic - these airlines can fly you to your destination from $598 and $598, respectively. These flights start at 41% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from Louisville to London one-way?

    $395 is the cheapest one-way deal found within the past few days, from United Airlines. You may also be able to find cheap deals on Air Canada and Lufthansa, with prices starting from $395 and $397, respectively.

  • What are the most popular routes from Louisville to London?

    When deciding which route to take from Louisville to London consider Louisville Intl - London Heathrow, Louisville Intl - London City or Louisville Intl - London Gatwick as they are the most popular.

  • Can I find deals for flights from Louisville to London that include hotel bookings?

    Yes. In addition to deals on Louisville to London flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Louisville to London?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Louisville to London.

  • Can I find deals for business class flights from Louisville to London?

    Yes. Cheapflights offers flight deals from Louisville to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Louisville to London?

    Currently, November is the cheapest month in which you can book a flight from Louisville to London (average of $527). Flying from Louisville to London in June is currently the most expensive (average of $918). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Hounslow
Ilford
Hayes
Southend-on-Sea
Harrow
Croydon
Eastleigh
Dartford
Dover
Winchester
Orpington
Gatwick
Borehamwood
Aylesbury
Bedford
Chipping Norton
Wembley
Folkestone
Eastbourne
Sutton

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Top 6 airlines flying from Louisville to London

Discover the top 6 airlines that operate flights from Louisville to London. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 27, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$574Average$795FlexibilityNo cancel feeOn-time75%
British AirwaysCheapest$598Average$795FlexibilityNo cancel feeOn-time70%
Virgin AtlanticCheapest$598Average$1,187FlexibilityNo cancel feeOn-time72%
American AirlinesCheapest$665Average$932FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$678Average$874FlexibilityNo cancel feeOn-time69%
DeltaCheapest$690Average$1,044FlexibilityNo cancel feeOn-timeN/A

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