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$397+ 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 12/10. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — LON
dic. 10 — dic. 171
mié. 12/10
mié. 12/17
1 adult, Economy
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Cheapflights Tip: The best prices from Louisville Intl to London are usually found in October or August, 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 noviembre 10, 2025.

This Delta deal was found by Cheapflights users on 11/9. 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.
mar. 12/23:18 pmSDF - LHR
1 stop11h 32mDelta
mar. 12/96:20 amLHR - SDF
2 stops16h 16mDelta
Deal found 11/9$589
This KLM deal was found by Cheapflights users on 11/9. 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.
mar. 12/23:18 pmSDF - LHR
1 stop11h 32mKLM
mar. 12/93:50 pmLHR - SDF
1 stop13h 09mKLM
Deal found 11/9$596
This United Airlines deal was found by Cheapflights users on 11/9. 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.
mar. 12/29:00 amSDF - LHR
2 stops17h 10mUnited Airlines
mar. 12/96:50 amLHR - SDF
2 stops15h 26mUnited Airlines
Deal found 11/9$617
This Mytrip deal was found by Cheapflights users on 11/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/81:50 pmSDF - LHR
2 stops36h 20mMultiple Airlines
lun. 12/156:30 amLHR - SDF
2 stops20h 59mMultiple Airlines
Deal found 11/10$618
This KLM deal was found by Cheapflights users on 11/10. 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.
lun. 12/83:16 pmSDF - LHR
1 stop12h 44mKLM
lun. 12/158:55 amLHR - SDF
1 stop14h 57mKLM
Deal found 11/10$621
This United Airlines deal was found by Cheapflights users on 11/10. 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.
lun. 12/812:20 pmSDF - LHR
1 stop12h 35mUnited Airlines
lun. 12/158:30 amLHR - SDF
2 stops17h 12mUnited Airlines
Deal found 11/10$627
This KLM deal was found by Cheapflights users on 11/10. 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.
lun. 12/17:54 pmSDF - LHR
1 stop10h 46mKLM
lun. 12/153:50 pmLHR - SDF
1 stop13h 09mKLM
Deal found 11/10$646
This Delta deal was found by Cheapflights users on 11/10. 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.
lun. 12/13:09 pmSDF - LHR
1 stop11h 41mDelta
lun. 12/1511:05 amLHR - SDF
2 stops16h 53mDelta
Deal found 11/10$650
This Air Canada deal was found by Cheapflights users on 11/9. 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 Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/29:00 amSDF - LHR
3 stops17h 10mMultiple Airlines
mar. 12/911:10 amLHR - SDF
2 stops17h 22mMultiple Airlines
Deal found 11/9$659
This United Airlines deal was found by Cheapflights users on 11/10. 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.
lun. 12/17:00 amSDF - LHR
2 stops19h 10mUnited Airlines
lun. 12/1511:10 amLHR - SDF
2 stops16h 19mUnited Airlines
Deal found 11/10$666
This Expedia deal was found by Cheapflights users on 11/10. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 12/135:57 pmSDF - LHR
2 stops31h 33mMultiple Airlines
dom. 1/118:15 pmLHR - SDF
2 stops31h 15mMultiple Airlines
Deal found 11/10$730
This United Airlines deal was found by Cheapflights users on 11/8. 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.
lun. 12/296:11 pmSDF - LHR
1 stop30h 44mUnited Airlines
mié. 1/73:10 pmLHR - SDF
1 stop13h 13mUnited Airlines
Deal found 11/8$738

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 noviembre 10, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$589
(Delta)

One-way from

$397
(Thrive Travel)

Popular in

December

Cheapest in

October

Average price

$1,095
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. 21% potential increase in price ($279 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($49 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 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 noviembre 10, 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

mar. 1/6

10:51 am-8:45 am

1 stop16h 54m

London Heathrow

lun. 1/19

6:30 am-9:15 pm

2 stops19h 45m

$601

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

mié. 2/11

12:22 pm-7:50 am

1 stop14h 28m

London Heathrow

mié. 2/18

3:50 pm-11:50 pm

1 stop13h 00m

$604

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

lun. 12/8

3:16 pm-9:00 am

1 stop12h 44m

London Heathrow

lun. 12/15

8:55 am-6:52 pm

1 stop14h 57m

$621

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

lun. 12/1

7:54 pm-11:40 am

1 stop10h 46m

London Heathrow

lun. 12/15

3:50 pm-11:59 pm

1 stop13h 09m

$646

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

lun. 12/1

3:09 pm-7:50 am

1 stop11h 41m

London Heathrow

lun. 12/15

11:05 am-10:58 pm

2 stops16h 53m

$650

LouisvilleLondon

SDF - LCY

SDFLCY

Louisville Intl

vie. 1/16

9:50 am-11:40 am

2 stops20h 50m

London City

lun. 1/19

5:50 pm-7:43 pm

2 stops30h 53m

$658

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

lun. 12/1

7:00 am-7:10 am

2 stops19h 10m

London Heathrow

lun. 12/15

11:10 am-10:29 pm

2 stops16h 19m

$666

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

mié. 4/15

2:35 pm-6:55 am

1 stop11h 20m

London Heathrow

mié. 4/29

2:05 pm-11:55 pm

2 stops14h 50m

$734

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

lun. 12/29

6:11 pm-5:55 am

1 stop30h 44m

London Heathrow

mié. 1/7

3:10 pm-11:23 pm

1 stop13h 13m

$738

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

sáb. 4/18

8:15 pm-6:55 am

1 stop29h 40m

London Heathrow

mié. 4/29

12:15 pm-7:02 pm

1 stop11h 47m

$741

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/8

Showing 1-10 of 42 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 November.
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 November 7, 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 $517). 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 noviembre 10, 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.

How much does it cost to fly round-trip from Louisville to London?

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 noviembre 10, 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
8,003 reviews

Crew

8.5

Entertainment

7.9

Food

7.3

Comfort

7.9

Overall

7.9

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,003 reviews
Delta
7.9
Good
8,003 reviews

Crew

8.5

Entertainment

7.9

Food

7.3

Comfort

7.9

Overall

7.9

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Virgin Atlantic
7.5
Good
672 reviews
Delta
7.9
Good
8,003 reviews

Crew

8.5

Entertainment

7.9

Food

7.3

Comfort

7.9

Overall

7.9

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,011 reviews
Delta
7.9
Good
8,003 reviews

Crew

8.5

Entertainment

7.9

Food

7.3

Comfort

7.9

Overall

7.9

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
American Airlines
7.2
Good
11,047 reviews
Delta
7.9
Good
8,003 reviews

Crew

8.5

Entertainment

7.9

Food

7.3

Comfort

7.9

Overall

7.9

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
British Airways
6.7
Okay
7,508 reviews
Delta
7.9
Good
8,003 reviews

Crew

8.5

Entertainment

7.9

Food

7.3

Comfort

7.9

Overall

7.9

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

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 14h 28m. 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 Virgin Atlantic and British Airways - these airlines can fly you to your destination from $580 and $598, respectively. These flights start at 42% lower than the current average price 3 months from now.

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

    $397 is the cheapest one-way deal found within the past few days, from Lufthansa. You may also be able to find cheap deals on United Airlines and Delta, with prices starting from $399 and $476, 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 $517). 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 noviembre 10, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$574Average$795FlexibilityNo cancel feeOn-time75%
Virgin AtlanticCheapest$580Average$1,187FlexibilityNo cancel feeOn-time72%
British AirwaysCheapest$598Average$795FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$665Average$912FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$678Average$874FlexibilityNo cancel feeOn-time69%
DeltaCheapest$690Average$1,040FlexibilityNo cancel feeOn-timeN/A

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