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$394+ Cheap flights from Louisville (SDF) to Heathrow (LHR)

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 11/18. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — LHR
Nov 28 — Dec 51
Fri 11/28
Fri 12/5
1 adult, Economy
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Cheapflights Tip: The best prices from Louisville Intl to London Heathrow are usually found in February or October, booked 69 days in advance, depart on a Wednesday or Monday and return on a Tuesday

Cheap flight deals from Louisville to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from Louisville (SDF) to Heathrow (LHR). 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 29, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$586
(Flighttix)

One-way from

$394
(United Airlines)

Popular in

June

Cheapest in

February

Average price

$708
Provider with most accurate pricing for Louisville Intl-London Heathrow flight deals.
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Provider most trusted by Cheapflights users for Louisville Intl-London Heathrow flights.
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From Louisville Intl to London Heathrow
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One-way flight from Louisville Intl to London Heathrow
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Highest demand for flights based on searches. 24% potential increase in price ($316 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($50 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find flight deals from Louisville to Heathrow

Cheapest flights from Louisville to Heathrow
Explore the most affordable flight options available from Louisville to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 29, 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 Flighttix deal was found by Cheapflights users on 10/28. 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 Flighttix is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/2512:37 pmSDF - LHR
1 stop13h 28mVirgin Atlantic
Tue 12/211:05 amLHR - SDF
1 stop12h 40mVirgin Atlantic
Deal found 10/28$586
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 10/2910:30 amSDF - LHR
1 stop18h 15mDelta
Wed 11/511:30 amLHR - SDF
2 stops16h 04mDelta
Deal found 10/27$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 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.
Wed 10/293:11 pmSDF - LHR
1 stop12h 39mKLM
Fri 11/73:50 pmLHR - SDF
1 stop13h 11mKLM
Deal found 10/27$599
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 10/2912:54 pmSDF - LHR
2 stops14h 11mDelta
Fri 11/73:50 pmLHR - SDF
1 stop13h 11mDelta
Deal found 10/27$604
This Mytrip deal was found by Cheapflights users on 10/29. 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.
Wed 11/2611:00 amSDF - LHR
2 stops15h 10mMultiple Airlines
Wed 12/38:45 amLHR - SDF
2 stops18h 44mMultiple Airlines
Deal found 10/29$610
This United Airlines deal was found by Cheapflights users on 10/29. 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.
Wed 11/262:02 pmSDF - LHR
1 stop10h 53mUnited Airlines
Wed 12/36:50 amLHR - SDF
2 stops15h 26mUnited Airlines
Deal found 10/29$620
This Justfly.com deal was found by Cheapflights users on 10/29. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/289:00 amSDF - LHR
2 stops17h 10mAir Canada
Fri 12/51:25 pmLHR - SDF
2 stops35h 02mAir Canada
Deal found 10/29$634

Cheapflights Fare Finder

 
Customize your flight search to find flights from Louisville to Heathrow 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 29, 2025.
Use the filters below to find and compare flights from Louisville to London Heathrow Airport that are best for you.

Fly from

Louisville

Fly to

Heathrow

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 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

Wed 12/10

12:58 pm-7:50 am

1 stop13h 52m

London Heathrow

Wed 12/17

1:05 pm-11:59 pm

2 stops15h 54m

$604

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Tue 11/25

10:37 am-7:05 am

2 stops15h 28m

London Heathrow

Tue 12/2

11:05 am-11:59 pm

2 stops17h 54m

$604

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 11/26

6:07 pm-11:15 am

1 stop12h 08m

London Heathrow

Wed 12/3

9:00 am-8:28 pm

2 stops16h 28m

$620

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Fri 11/28

9:00 am-7:10 am

2 stops17h 10m

London Heathrow

Fri 12/5

1:25 pm-7:27 pm

2 stops35h 02m

$634

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Fri 12/5

9:00 am-7:10 am

2 stops17h 10m

London Heathrow

Tue 12/9

11:10 am-10:29 pm

2 stops16h 19m

$635

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 11/26

2:02 pm-5:55 am

1 stop10h 53m

London Heathrow

Wed 12/3

12:00 pm-7:27 pm

1 stop12h 27m

$646

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Fri 12/12

6:16 pm-11:40 am

1 stop12h 24m

London Heathrow

Fri 12/19

3:50 pm-9:29 am

1 stop22h 39m

$649

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Tue 11/18

8:30 am-8:35 pm

2 stops31h 05m

$394

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

Showing 1-10 of 16 results
1
2

Compare providers for flights from Louisville to Heathrow

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 Heathrow 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
JustAirTicketPrice Accuracy-Trust Score*1 star

*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 Heathrow Airport flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Louisville-London Heathrow Airport flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Louisville-London Heathrow Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Louisville-London Heathrow Airport 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 Heathrow Airport 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 Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow 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 Heathrow Airport

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

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

To ensure you get the cheapest price possible for a flight from Louisville to London Heathrow Airport, you should look to book at least 69 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 Heathrow Airport?

Currently, November is the cheapest month in which you can book a flight from Louisville to London Heathrow Airport (average of $527). Flying from Louisville to London Heathrow Airport 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 LHR?

Find hourly flight availability from Louisville to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 29, 2025.

A simple way to save on the total cost of your ticket is to fly from Louisville to London Heathrow Airport in the evening. If you’re flexible enough to do this you can expect to save up to 15% on your trip compared to booking a flight at noon.

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. 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 Heathrow. Reviews last updated October 29, 2025.
See what other customers who have flown with Delta, Virgin Atlantic, and United Airlines from Louisville to London Heathrow Airport have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
7,993 reviews

Comfort

7.9

Crew

8.5

Food

7.3

Overall

7.9

Boarding

8.2

Entertainment

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
7,993 reviews
Delta
7.9
Good
7,993 reviews

Comfort

7.9

Crew

8.5

Food

7.3

Overall

7.9

Boarding

8.2

Entertainment

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
7,993 reviews

Comfort

7.9

Crew

8.5

Food

7.3

Overall

7.9

Boarding

8.2

Entertainment

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
8,998 reviews
Delta
7.9
Good
7,993 reviews

Comfort

7.9

Crew

8.5

Food

7.3

Overall

7.9

Boarding

8.2

Entertainment

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
11,030 reviews
Delta
7.9
Good
7,993 reviews

Comfort

7.9

Crew

8.5

Food

7.3

Overall

7.9

Boarding

8.2

Entertainment

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
7,487 reviews
Delta
7.9
Good
7,993 reviews

Comfort

7.9

Crew

8.5

Food

7.3

Overall

7.9

Boarding

8.2

Entertainment

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 Heathrow. 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 Heathrow?

    If you book a flight to London Heathrow from Louisville, you will be flying from Louisville Intl, which is the city’s only airport. Louisville Intl (SDF) is located 5.3 mi from the center of Louisville. There are 0 flights from Louisville Intl to London Heathrow per day from 6 different airlines.

  • How long is the flight from Louisville to London Heathrow Airport?

    Delta, KLM, and Virgin Atlantic can get you from Louisville to London Heathrow Airport in just under 12h 51m. Your travel time can differ by up to 3h 22m. Louisville and London Heathrow Airport are separated by a distance of 4033 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    Cheapflights users have booked flights from Louisville to London Heathrow Airport round-trip from $574. Other airlines that can offer you cheap pricing are British Airways, from $598, and Virgin Atlantic, from $598. You may be able to fly from Louisville to London Heathrow Airport for 41% less than the average price by searching for these airlines.

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

    $394 is the cheapest one-way deal found within the past few days, from Air Canada. You may also be able to find cheap deals on United Airlines and Lufthansa, with prices starting from $394 and $397, respectively.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Louisville to Heathrow 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 Heathrow Airport?

    Currently, November is the cheapest month in which you can book a flight from Louisville to London Heathrow Airport (average of $527). Flying from Louisville to London Heathrow Airport 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 Heathrow Airport?

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

Browse thousands of different options on Cheapflights for your next trip

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Top 6 airlines flying from Louisville to Heathrow

Discover the top 6 airlines that operate flights from Louisville to Heathrow. 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 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$574Average$795FlexibilityNo cancel feeOn-time75%
British AirwaysCheapest$598Average$795FlexibilityNo cancel feeOn-time70%
Virgin AtlanticCheapest$598Average$1,187FlexibilityNo cancel feeOn-time72%
United AirlinesCheapest$678Average$874FlexibilityNo cancel feeOn-time69%
DeltaCheapest$690Average$1,044FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$692Average$1,105FlexibilityNo cancel feeOn-time71%

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