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Heathrow

$321+ 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
Aug 29 — Sep 51
Sat 8/29
Sat 9/5
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 July 30, 2026.

This United Airlines deal was found by Cheapflights users on 7/29. 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.
Sun 11/16:30 pm
SDF
-
LHR
1 stop11h 35m
United Airlines
Tue 11/36:50 am
LHR
-
SDF
2 stops15h 07m
United Airlines
Deal found 7/29$774
This Iberia deal was found by Cheapflights users on 7/29. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/196:14 pm
SDF
-
LHR
1 stop13h 01m
Iberia
Wed 10/286:15 am
LHR
-
SDF
2 stops19h 20m
Iberia
Deal found 7/29$859
This Iberia deal was found by Cheapflights users on 7/27. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2112:41 pm
SDF
-
LHR
2 stops16h 54m
Iberia
Wed 10/287:35 am
LHR
-
SDF
2 stops18h 00m
Iberia
Deal found 7/27$872
This FlightHub deal was found by Cheapflights users on 7/25. 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 11/111:14 pm
SDF
-
LHR
1 stop12h 41m
British Airways
Mon 11/164:30 pm
LHR
-
SDF
2 stops22h 52m
British Airways
Deal found 7/25$877
This Delta deal was found by Cheapflights users on 7/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/218:09 am
SDF
-
LHR
1 stop18h 06m
Delta
Fri 10/28:40 am
LHR
-
SDF
2 stops16h 53m
Delta
Deal found 7/29$884
This American Airlines deal was found by Cheapflights users on 7/28. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/214:51 pm
SDF
-
LHR
1 stop10h 09m
American Airlines
Fri 10/29:15 am
LHR
-
SDF
1 stop14h 55m
American Airlines
Deal found 7/28$885
This British Airways deal was found by Cheapflights users on 7/29. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/215:59 pm
SDF
-
LHR
1 stop11h 51m
British Airways
Fri 10/22:25 pm
LHR
-
SDF
1 stop13h 08m
British Airways
Deal found 7/29$893
This Iberia deal was found by Cheapflights users on 7/29. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/111:14 pm
SDF
-
LHR
1 stop16h 11m
Iberia
Sun 11/156:15 am
LHR
-
SDF
2 stops20h 22m
Iberia
Deal found 7/29$909

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 July 30, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$774
(United Airlines)

One-way from

$321
(TravelUp)

Popular in

July

Cheapest in

February

Average price

$1,355
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. 19% potential increase in price ($238 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($34 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 July 30, 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

Mon 9/21

5:59 pm-10:50 am

1 stop11h 51m

London Heathrow

Fri 10/2

2:25 pm-10:33 pm

1 stop13h 08m

$893

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Sun 10/18

1:25 pm-5:55 am

1 stop11h 30m

London Heathrow

Wed 10/28

12:00 pm-8:39 pm

1 stop12h 39m

$913

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 11/11

12:57 pm-7:20 am

1 stop13h 23m

London Heathrow

Sun 11/15

12:35 pm-9:37 pm

1 stop14h 02m

$943

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 12/30

1:43 pm-5:55 am

1 stop11h 12m

London Heathrow

Wed 1/6

5:30 pm-8:00 pm

2 stops31h 30m

$946

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Tue 9/15

7:27 pm-12:10 pm

1 stop11h 43m

London Heathrow

Wed 9/23

12:30 pm-11:22 pm

1 stop15h 52m

$958

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 9/16

9:00 am-8:30 am

1 stop18h 30m

London Heathrow

Wed 9/30

6:50 am-5:40 pm

2 stops15h 50m

$963
Quickest round-trip

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Tue 10/20

6:15 am-9:25 pm

1 stop10h 10m

London Heathrow

Sat 10/31

9:10 am-5:41 pm

1 stop12h 31m

$963

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Mon 12/14

1:55 pm-5:55 am

1 stop11h 00m

London Heathrow

Fri 12/18

7:40 am-8:55 pm

1 stop18h 15m

$979

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 9/2

10:05 am-8:35 am

2 stops17h 30m

London Heathrow

Sun 9/6

6:50 am-4:35 pm

2 stops14h 45m

$1,012

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Fri 8/28

6:30 pm-10:30 am

1 stop11h 00m

London Heathrow

Fri 9/4

11:10 am-6:00 pm

1 stop11h 50m

$1,036

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/25

Showing 1-10 of 20 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 July.
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 July is currently the most expensive (average of $1,355). 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?

Airfare is below average for this route at the moment.

Louisville to London Heathrow Airport flights typically cost between $845 and $1,178 in November.
The cheapest round-trip price found within the last 5 days was $774 on United Airlines (Nov 1-Nov 3).

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 July 30, 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
1,551 reviews

Overall

7.8

Food

7.3

Comfort

7.7

Boarding

7.8

Crew

8.4

Entertainment

7.2

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
1,551 reviews
KLM
7.8
Good
1,551 reviews

Overall

7.8

Food

7.3

Comfort

7.7

Boarding

7.8

Crew

8.4

Entertainment

7.2

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
8,489 reviews
KLM
7.8
Good
1,551 reviews

Overall

7.8

Food

7.3

Comfort

7.7

Boarding

7.8

Crew

8.4

Entertainment

7.2

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
10,046 reviews
KLM
7.8
Good
1,551 reviews

Overall

7.8

Food

7.3

Comfort

7.7

Boarding

7.8

Crew

8.4

Entertainment

7.2

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
11,842 reviews
KLM
7.8
Good
1,551 reviews

Overall

7.8

Food

7.3

Comfort

7.7

Boarding

7.8

Crew

8.4

Entertainment

7.2

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
8,127 reviews
KLM
7.8
Good
1,551 reviews

Overall

7.8

Food

7.3

Comfort

7.7

Boarding

7.8

Crew

8.4

Entertainment

7.2

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?

    British Airways and United Airlines can get you from Louisville to London Heathrow Airport in just under 11h 30m. Your travel time can differ by up to 21m. 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 $580, and Delta, from $588. You may be able to fly from Louisville to London Heathrow Airport for 42% 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 July is currently the most expensive (average of $1,355). 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
Wembley
Harrow
Eastleigh
Southend-on-Sea
Watford
Northampton
Dartford
Chipping Norton
Kingston upon Thames
Eastbourne
Slough
Stansted
Sutton
Luton

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 July 30, 2026.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$574Average$716FlexibilityNo cancel feeOn-time75%
Virgin AtlanticCheapest$580Average$774FlexibilityNo cancel feeOn-time72%
DeltaCheapest$588Average$859FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$606Average$1,106FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$676Average$992FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$705Average$1,091FlexibilityNo cancel feeOn-time69%

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