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$349+ 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 2/15. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — LHR
Jan 13 — Jan 201
Tue 1/13
Tue 1/20
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

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 December 14, 2025.

This American Airlines deal was found by Cheapflights users on 12/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/267:24 pmSDF - LHR
1 stop11h 36mAmerican Airlines
Mon 12/291:10 pmLHR - SDF
1 stop13h 31mAmerican Airlines
Deal found 12/12$952
This Delta deal was found by Cheapflights users on 12/12. 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.
Fri 12/267:25 amSDF - LHR
1 stop20h 20mDelta
Mon 12/296:20 amLHR - SDF
2 stops18h 50mDelta
Deal found 12/12$1,090
This Gotogate deal was found by Cheapflights users on 12/12. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/2610:50 amSDF - LHR
2 stops19h 30mAir Canada
Mon 12/299:00 amLHR - SDF
2 stops43h 37mAir Canada
Deal found 12/12$1,118
This Delta deal was found by Cheapflights users on 12/12. 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.
Fri 12/267:25 amSDF - LHR
1 stop20h 20mDelta
Fri 1/211:05 amLHR - SDF
1 stop16h 58mDelta
Deal found 12/12$1,329
This Flighttix deal was found by Cheapflights users on 12/13. 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.
Mon 12/292:00 pmSDF - LHR
1 stop12h 55mMultiple Airlines
Fri 1/29:00 amLHR - SDF
2 stops43h 37mMultiple Airlines
Deal found 12/13$1,483
This Finnair deal was found by Cheapflights users on 12/14. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/263:44 pmSDF - LHR
1 stop10h 36mMultiple Airlines
Fri 1/22:45 pmLHR - SDF
1 stop12h 00mMultiple Airlines
Deal found 12/14$1,498
This Expedia deal was found by Cheapflights users on 12/13. 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.
Wed 12/1711:43 amSDF - LHR
2 stops15h 22mAer Lingus
Fri 12/198:50 amLHR - SDF
2 stops18h 04mAer Lingus
Deal found 12/13$1,610
This Finnair deal was found by Cheapflights users on 12/13. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/283:44 pmSDF - LHR
1 stop12h 31mMultiple Airlines
Fri 1/22:45 pmLHR - SDF
1 stop12h 00mMultiple Airlines
Deal found 12/13$1,622
This Gotogate deal was found by Cheapflights users on 12/13. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2810:50 amSDF - LHR
2 stops15h 20mAir Canada
Fri 1/29:00 amLHR - SDF
2 stops43h 37mAir Canada
Deal found 12/13$1,651
This Finnair deal was found by Cheapflights users on 12/12. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/275:49 pmSDF - LHR
1 stop11h 36mMultiple Airlines
Fri 1/22:45 pmLHR - SDF
1 stop12h 00mMultiple Airlines
Deal found 12/12$1,681

Find 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 December 14, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$596
(Cheapflightsfares)

One-way from

$349
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$1,223
Provider with most accurate pricing for Louisville Intl-London Heathrow flight deals.
Search Deals
Provider most trusted by Cheapflights users for Louisville Intl-London Heathrow flights.
Search Deals
From Louisville Intl to London Heathrow
Search Deals
One-way flight from Louisville Intl to London Heathrow
Search Deals
Highest demand for flights based on searches. 28% potential increase in price ($372 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($55 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 December 14, 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

Fri 1/23

2:05 pm-7:55 am

1 stop12h 50m

London Heathrow

Sat 1/31

6:35 am-7:43 pm

2 stops18h 08m

$596

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Mon 1/12

1:50 pm-11:05 am

1 stop16h 15m

London Heathrow

Thu 1/22

7:30 am-7:31 pm

2 stops17h 01m

$607

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Mon 1/12

2:05 pm-5:55 am

1 stop10h 50m

London Heathrow

Mon 1/19

6:30 am-7:31 pm

2 stops18h 01m

$607

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Fri 1/23

8:29 am-7:10 am

2 stops17h 41m

London Heathrow

Sat 1/31

8:45 am-10:30 pm

2 stops18h 45m

$623

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 2/11

2:10 pm-9:45 am

2 stops14h 35m

London Heathrow

Sun 2/15

6:30 am-7:42 pm

2 stops18h 12m

$624

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Fri 1/23

1:50 pm-6:20 am

1 stop11h 30m

London Heathrow

Tue 1/27

6:50 am-5:37 pm

2 stops15h 47m

$627

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Tue 1/27

2:05 pm-7:55 am

1 stop12h 50m

London Heathrow

Tue 2/3

6:50 am-5:37 pm

2 stops15h 47m

$628

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 2/25

1:50 pm-6:20 am

1 stop11h 30m

London Heathrow

Thu 3/5

6:50 am-10:13 pm

2 stops20h 23m

$628

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Thu 1/22

11:10 am-7:10 am

2 stops15h 00m

London Heathrow

Fri 1/30

6:50 am-5:37 pm

2 stops15h 47m

$631

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Sun 2/15

2:26 pm-12:40 pm

3 stops41h 14m

$349

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/13

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 December.
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
OvagoPrice Accuracy2 starsTrust Score*2 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 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 December 12, 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 $518). 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 December 14, 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.

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

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 December 14, 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
8,008 reviews

Food

7.3

Comfort

7.9

Overall

7.9

Boarding

8.1

Entertainment

7.9

Crew

8.5

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
8,008 reviews
Delta
7.9
Good
8,008 reviews

Food

7.3

Comfort

7.9

Overall

7.9

Boarding

8.1

Entertainment

7.9

Crew

8.5

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
675 reviews
Delta
7.9
Good
8,008 reviews

Food

7.3

Comfort

7.9

Overall

7.9

Boarding

8.1

Entertainment

7.9

Crew

8.5

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
9,092 reviews
Delta
7.9
Good
8,008 reviews

Food

7.3

Comfort

7.9

Overall

7.9

Boarding

8.1

Entertainment

7.9

Crew

8.5

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
11,051 reviews
Delta
7.9
Good
8,008 reviews

Food

7.3

Comfort

7.9

Overall

7.9

Boarding

8.1

Entertainment

7.9

Crew

8.5

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
7,574 reviews
Delta
7.9
Good
8,008 reviews

Food

7.3

Comfort

7.9

Overall

7.9

Boarding

8.1

Entertainment

7.9

Crew

8.5

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 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?

    Lufthansa can get you from Louisville to London Heathrow Airport in just under 12h 50m. Your travel time can differ by up to . Louisville and London Heathrow Airport are separated by a distance of 4033 mi.

  • 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 Virgin Atlantic, from $580, and British Airways, from $598. You may be able to fly from Louisville to London Heathrow Airport for 38% less than the average price by searching for these airlines.

  • 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 $518). 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
Ilford
Hounslow
Southend-on-Sea
Harrow
Eastleigh
Dartford
Dover
Winchester
Croydon
Orpington
Northampton
Watford
Hayes
Borehamwood
Broadway
Aylesbury
Chipping Norton
Horley
Kingston upon Thames
Wembley

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 December 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$574Average$795FlexibilityNo cancel feeOn-time75%
Virgin AtlanticCheapest$580Average$1,187FlexibilityNo cancel feeOn-time72%
British AirwaysCheapest$598Average$796FlexibilityNo cancel feeOn-time70%
DeltaCheapest$675Average$1,038FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$678Average$874FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$692Average$1,100FlexibilityNo cancel feeOn-time71%

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