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$287+ 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 11/17. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — LON
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
1 adult, Economy
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Cheapflights Tip: The best prices from Louisville Intl to London are usually found in August or October, booked 53 days in advance, depart on a Wednesday or Tuesday and return on a Thursday

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 September 17, 2025.

Round-trip from

$550
(Norse)

One-way from

$287
(Mytrip)

Popular in

June

Cheapest in

August

Average price

$749
From Louisville Intl to London (LON)
Search Deals
One-way flight from Louisville Intl to London (LON)
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Highest demand for flights based on searches. 18% potential increase in price ($227 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($37 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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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 September 17, 2025.

This Norse deal was found by Cheapflights users on 9/15. 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 Norse is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/16:00 amSDF - LGW
1 stop23h 00mMultiple Airlines
Fri 12/52:00 pmLGW - SDF
1 stop14h 45mMultiple Airlines
Deal found 9/15$550
This Delta deal was found by Cheapflights users on 9/15. 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 10/1310:30 amSDF - LHR
1 stop17h 25mDelta
Wed 10/2211:30 amLHR - SDF
2 stops17h 31mDelta
Deal found 9/15$568
This Billigflug deal was found by Cheapflights users on 9/16. 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 Billigflug is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/287:33 pmSDF - LHR
1 stop12h 57mAir France
Tue 10/141:05 pmLHR - SDF
1 stop13h 43mAir France
Deal found 9/16$569
This Delta deal was found by Cheapflights users on 9/16. 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.
Sun 9/287:33 pmSDF - LHR
1 stop12h 57mDelta
Tue 10/148:40 amLHR - SDF
2 stops17h 35mDelta
Deal found 9/16$570
This KLM deal was found by Cheapflights users on 9/15. 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 10/136:05 pmSDF - LHR
1 stop9h 50mKLM
Wed 10/2211:45 amLHR - SDF
1 stop14h 30mKLM
Deal found 9/15$576
This Virgin Atlantic deal was found by Cheapflights users on 9/16. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/2312:48 pmSDF - LHR
2 stops13h 27mVirgin Atlantic
Tue 9/3010:55 amLHR - SDF
2 stops15h 21mVirgin Atlantic
Deal found 9/16$581
This Scandinavian Airlines deal was found by Cheapflights users on 9/15. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/13:09 pmSDF - LHR
2 stops22h 21mScandinavian Airlines
Fri 12/56:40 amLHR - SDF
2 stops22h 25mScandinavian Airlines
Deal found 9/15$604
This Kiwi.com deal was found by Cheapflights users on 9/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/26:00 amSDF - LGW
2 stops43h 00mMultiple Airlines
Fri 12/52:00 pmLGW - SDF
1 stop14h 45mMultiple Airlines
Deal found 9/15$610
This Kiwi.com deal was found by Cheapflights users on 9/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/36:00 amSDF - LGW
2 stops19h 00mMultiple Airlines
Fri 12/52:00 pmLGW - SDF
1 stop14h 45mMultiple Airlines
Deal found 9/15$611
This Delta deal was found by Cheapflights users on 9/16. 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 11/412:39 pmSDF - LHR
1 stop13h 26mDelta
Sun 11/911:30 amLHR - SDF
2 stops17h 36mDelta
Deal found 9/16$618
This Delta deal was found by Cheapflights users on 9/16. 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.
Thu 10/29:30 amSDF - LHR
1 stop16h 45mDelta
Tue 10/711:45 amLHR - SDF
2 stops16h 09mDelta
Deal found 9/16$620
This Kiwi.com deal was found by Cheapflights users on 9/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/16:00 amSDF - LGW
1 stop23h 00mMultiple Airlines
Sat 12/62:00 pmLGW - SDF
1 stop14h 45mMultiple Airlines
Deal found 9/15$630

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 September 17, 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 - LGW

SDFLGW

Louisville Intl

Mon 12/1

6:00 am-10:00 am

1 stop23h 00m

London Gatwick

Fri 12/5

2:00 pm-11:45 pm

1 stop14h 45m

$550

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Mon 10/13

10:30 am-8:55 am

1 stop17h 25m

London Heathrow

Wed 10/22

11:30 am-12:01 am

2 stops17h 31m

$568

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Tue 11/11

12:57 pm-7:50 am

1 stop13h 53m

London Heathrow

Wed 11/19

8:55 am-9:31 pm

2 stops17h 36m

$568

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Sun 9/28

7:33 pm-1:30 pm

1 stop12h 57m

London Heathrow

Tue 10/14

8:40 am-9:15 pm

2 stops17h 35m

$570

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Tue 11/11

6:16 pm-11:40 am

1 stop12h 24m

London Heathrow

Wed 11/19

8:55 am-7:12 pm

1 stop15h 17m

$576

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Tue 9/23

7:44 pm-1:10 pm

1 stop12h 26m

London Heathrow

Tue 9/30

3:15 pm-11:52 pm

1 stop13h 37m

$576

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 9/24

12:48 pm-6:45 am

1 stop12h 57m

London Heathrow

Wed 10/8

11:45 am-9:15 pm

1 stop14h 30m

$576

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Mon 10/13

3:11 pm-6:45 am

1 stop10h 34m

London Heathrow

Wed 10/22

11:45 am-9:15 pm

1 stop14h 30m

$577

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Tue 9/23

10:26 am-6:45 am

2 stops15h 19m

London Heathrow

Tue 9/30

12:25 pm-10:58 pm

1 stop15h 33m

$581

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Mon 12/1

3:09 pm-6:30 pm

2 stops22h 21m

London Heathrow

Fri 12/5

9:05 pm-9:30 pm

3 stops29h 25m

$611

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 37 results
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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 September 12, 2025.

To ensure you get the cheapest price possible for a flight from Louisville to London, you should look to book at least 53 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 $661). Flying from Louisville to London in June is currently the most expensive (average of $1,097). 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 September 17, 2025.

It’s typically best to fly out from Louisville to London in the afternoon. Doing so could potentially save you 13% 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 67% 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.

Atlanta (ATL) is the most affordable 1-stop option, with an average round-trip price of $575.

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 September 17, 2025.
Read through reviews of airlines operating flights from Louisville to London, such as Delta, United Airlines, and Virgin Atlantic. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,961 reviews

Comfort

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,961 reviews
Delta
8.0
Very good
7,961 reviews

Comfort

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,926 reviews
Delta
8.0
Very good
7,961 reviews

Comfort

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Virgin Atlantic
7.4
Good
664 reviews
Delta
8.0
Very good
7,961 reviews

Comfort

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,961 reviews

Comfort

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
British Airways
6.7
Okay
7,367 reviews
Delta
8.0
Very good
7,961 reviews

Comfort

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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 24m. 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 41% lower than the current average price 3 months from now.

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

    $419 is the cheapest one-way deal found within the past few days, from British Airways. You may also be able to find cheap deals on Air Canada and Lufthansa, with prices starting from $454 and $478, 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 $661). Flying from Louisville to London in June is currently the most expensive (average of $1,097). 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
Hayes
Southend-on-Sea
Harrow
Canterbury
Croydon
Eastleigh
Dartford
Dover
Winchester
Orpington
Gatwick
Borehamwood
Aylesbury
Bedford
Wembley
Folkestone
Chichester
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 September 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$574Average$795FlexibilityNo cancel feeOn-time75%
Virgin AtlanticCheapest$580Average$1,242FlexibilityNo cancel feeOn-time72%
British AirwaysCheapest$598Average$791FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$684Average$878FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$692Average$981FlexibilityNo cancel feeOn-time71%
DeltaCheapest$694Average$987FlexibilityNo cancel feeOn-timeN/A

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