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Heathrow

$331+ 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 10/4. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — LHR
Jul 18 — Jul 251
Sat 7/18
Sat 7/25
1 adult, Economy
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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 June 18, 2026.

This FlightHub deal was found by Cheapflights users on 6/15. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/145:00 pm
SDF
-
LHR
1 stop10h 00m
British Airways
Wed 10/216:15 am
LHR
-
SDF
2 stops20h 23m
British Airways
Deal found 6/15$886
This oojo deal was found by Cheapflights users on 6/13. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/2112:38 pm
SDF
-
LHR
1 stop13h 17m
British Airways
Fri 10/29:15 am
LHR
-
SDF
1 stop12h 59m
British Airways
Deal found 6/13$891
This oojo deal was found by Cheapflights users on 6/13. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/142:53 pm
SDF
-
LHR
1 stop11h 02m
British Airways
Wed 9/233:00 pm
LHR
-
SDF
1 stop13h 22m
British Airways
Deal found 6/13$893
This Iberia deal was found by Cheapflights users on 6/13. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/1410:29 am
SDF
-
LHR
1 stop19h 21m
Iberia
Wed 9/236:15 am
LHR
-
SDF
2 stops21h 18m
Iberia
Deal found 6/13$895
This Delta deal was found by Cheapflights users on 6/16. 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.
Mon 9/218:10 am
SDF
-
LHR
1 stop17h 15m
Delta
Fri 10/26:30 am
LHR
-
SDF
2 stops15h 41m
Delta
Deal found 6/16$904
This United Airlines deal was found by Cheapflights users on 6/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/1410:25 am
SDF
-
LHR
2 stops15h 05m
United Airlines
Wed 10/217:25 am
LHR
-
SDF
2 stops18h 06m
United Airlines
Deal found 6/15$907
This Delta deal was found by Cheapflights users on 6/15. 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 9/142:42 pm
SDF
-
LHR
2 stops14h 38m
Delta
Wed 9/239:55 am
LHR
-
SDF
2 stops16h 17m
Delta
Deal found 6/15$908
This United Airlines deal was found by Cheapflights users on 6/16. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/1910:25 am
SDF
-
LHR
2 stops15h 30m
United Airlines
Fri 10/236:50 am
LHR
-
SDF
2 stops17h 34m
United Airlines
Deal found 6/16$909
This Expedia deal was found by Cheapflights users on 6/16. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/15:59 pm
SDF
-
LHR
1 stop13h 16m
Iberia
Tue 10/66:15 am
LHR
-
SDF
2 stops21h 40m
Iberia
Deal found 6/16$916
This Iberia deal was found by Cheapflights users on 6/13. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/92:41 pm
SDF
-
LHR
1 stop11h 59m
Iberia
Tue 9/226:15 am
LHR
-
SDF
2 stops21h 18m
Iberia
Deal found 6/13$925

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 June 18, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$886
(FlightHub)

One-way from

$331
(British Airways)

Popular in

June

Cheapest in

February

Average price

$1,345
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. 22% potential increase in price ($276 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($38 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
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 June 18, 2026.
Use the filters below to find and compare flights from Louisville to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Sun 9/27

10:25 am-5:55 am

2 stops14h 30m

London Heathrow

Sat 10/3

8:45 am-8:31 pm

2 stops16h 46m

$959

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Mon 8/17

9:52 am-7:10 am

2 stops16h 18m

London Heathrow

Tue 8/25

6:30 am-5:00 pm

2 stops15h 30m

$968

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 7/29

6:48 am-7:55 am

1 stop20h 07m

London Heathrow

Wed 8/5

9:15 am-5:59 pm

1 stop13h 44m

$1,048

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 8/12

11:17 am-6:20 am

2 stops14h 03m

London Heathrow

Sun 8/16

8:40 am-7:11 pm

2 stops15h 31m

$1,075

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Fri 7/31

2:10 pm-6:45 am

1 stop11h 35m

London Heathrow

Mon 8/10

5:50 pm-7:07 pm

2 stops30h 17m

$1,112

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 7/15

2:22 pm-7:10 am

1 stop11h 48m

London Heathrow

Fri 7/24

1:25 pm-12:26 am

1 stop16h 01m

$1,119

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Mon 7/27

2:10 pm-6:45 am

1 stop11h 35m

London Heathrow

Sun 8/2

8:00 am-8:23 pm

1 stop17h 23m

$1,148
Quickest round-trip

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Sat 7/25

6:30 am-9:25 pm

1 stop9h 55m

London Heathrow

Fri 7/31

7:30 am-6:56 pm

2 stops16h 26m

$1,213

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Mon 7/27

11:17 am-6:20 am

2 stops14h 03m

London Heathrow

Sun 8/2

6:15 am-4:47 pm

2 stops15h 32m

$1,229

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Sat 9/5

3:25 pm-5:40 pm

2 stops21h 15m

London Heathrow

Sun 9/27

9:05 pm-9:39 pm

3 stops29h 34m

$1,302

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/15

Showing 1-10 of 16 resultsSorted by cheapest first
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 June.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy3 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Louisville-London Heathrow Airport flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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

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

Currently, February is the cheapest month in which you can book a flight from Louisville to London Heathrow Airport (average of $630). Flying from Louisville to London Heathrow Airport in June is currently the most expensive (average of $1,345). 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.

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 June 18, 2026.
See what other customers who have flown with KLM,Delta, andUnited 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.
KLM
7.8
Good
1,530 reviews

Boarding

7.8

Crew

8.4

Overall

7.8

Comfort

7.7

Entertainment

7.2

Food

7.3

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
KLM
7.8
Good
1,530 reviews
KLM
7.8
Good
1,530 reviews

Boarding

7.8

Crew

8.4

Overall

7.8

Comfort

7.7

Entertainment

7.2

Food

7.3

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
Delta
7.8
Good
8,410 reviews
KLM
7.8
Good
1,530 reviews

Boarding

7.8

Crew

8.4

Overall

7.8

Comfort

7.7

Entertainment

7.2

Food

7.3

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
United Airlines
7.4
Good
9,859 reviews
KLM
7.8
Good
1,530 reviews

Boarding

7.8

Crew

8.4

Overall

7.8

Comfort

7.7

Entertainment

7.2

Food

7.3

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
American Airlines
7.1
Good
11,688 reviews
KLM
7.8
Good
1,530 reviews

Boarding

7.8

Crew

8.4

Overall

7.8

Comfort

7.7

Entertainment

7.2

Food

7.3

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
British Airways
6.7
Okay
8,054 reviews
KLM
7.8
Good
1,530 reviews

Boarding

7.8

Crew

8.4

Overall

7.8

Comfort

7.7

Entertainment

7.2

Food

7.3

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful

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?

    United Airlines, Delta, and British Airways can get you from Louisville to London Heathrow Airport in just under 14h 30m. Your travel time can differ by up to 5h 37m. 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 Virgin Atlantic, from $577, and Delta, from $588. 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, February is the cheapest month in which you can book a flight from Louisville to London Heathrow Airport (average of $630). Flying from Louisville to London Heathrow Airport in June is currently the most expensive (average of $1,345). 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
Dorking
Hounslow
Winchester
Croydon
Gatwick
Southend-on-Sea
Wembley
Harrow
Eastleigh
Dartford
Dover
Orpington
Watford
Northampton
Chipping Norton
Hayes
Kingston upon Thames
Eastbourne
Slough

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 June 18, 2026.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$574Average$716FlexibilityNo cancel feeOn-time75%
Virgin AtlanticCheapest$577Average$774FlexibilityNo cancel feeOn-time72%
DeltaCheapest$588Average$859FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$589Average$959FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$655Average$999FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$678Average$1,091FlexibilityNo cancel feeOn-time69%

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