Find flights
When to book
Airlines
FAQs

Cheap flights from London Heathrow Airport to Louisville from £398

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 4/6. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SDF
19 May — 26 May1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Heathrow to Louisville

Enter your travel dates to find the best prices.

Cheapest flights from Heathrow to Louisville
Explore the most affordable flight options available from Heathrow to Louisville. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 19 April 2026.

Tue 1/908:00
LHR
-
SDF
1 stop13h 51m
United Airlines
Tue 15/913:36
SDF
-
LHR
1 stop14h 24m
United Airlines
Deal found 16/4£621
Wed 16/915:00
LHR
-
SDF
1 stop11h 39m
British Airways
Mon 21/917:56
SDF
-
LHR
1 stop10h 29m
British Airways
Deal found 14/4£653
Wed 16/909:15
LHR
-
SDF
1 stop11h 55m
British Airways
Thu 24/917:00
SDF
-
LHR
1 stop10h 00m
British Airways
Deal found 18/4£657
Wed 16/907:30
LHR
-
SDF
2 stops17h 32m
Lufthansa
Wed 23/913:46
SDF
-
LHR
1 stop11h 09m
Lufthansa
Deal found 16/4£669
Wed 16/908:40
LHR
-
SDF
2 stops29h 35m
United Airlines
Mon 21/905:35
SDF
-
LHR
2 stops19h 55m
United Airlines
Deal found 14/4£679
Sat 24/1006:40
LHR
-
SDF
2 stops22h 22m
Scandinavian Airlines
Fri 30/1017:45
SDF
-
LHR
2 stops18h 15m
Scandinavian Airlines
Deal found 18/4£680
Wed 16/912:30
LHR
-
SDF
1 stop12h 12m
British Airways
Wed 23/912:12
SDF
-
LHR
1 stop13h 43m
British Airways
Deal found 15/4£685
Wed 27/514:45
LHR
-
SDF
1 stop12h 34m
British Airways
Mon 1/617:08
SDF
-
LHR
1 stop9h 52m
British Airways
Deal found 16/4£687
Tue 1/908:00
LHR
-
SDF
1 stop21h 05m
Lufthansa
Thu 17/910:05
SDF
-
LHR
1 stop15h 50m
Lufthansa
Deal found 18/4£691

Find flight deals from Heathrow to Louisville

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to Louisville (SDF). 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 19 April 2026.

Round-trip from

£621

One-way from

£398

Popular in

March

Cheapest in

September

Average price

£636
United Airlines
  • United Airlines
  • 1/9-15/9
  • 2 total stops
  • 28h 15m total
  • London to Louisville
Search Deals
4/6
  • 4/6
  • 3 total stops
  • 30h 48m total
  • London to Louisville
Search Deals
Highest demand for flights based on searches. 5% potential increase in price (£26 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£17 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Heathrow to Louisville 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 858,174 searches. Data last updated 19 April 2026.
Use the filters below to find and compare flights from London Heathrow Airport to Louisville that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonLouisville

LHR - SDF

LHRSDF

London Heathrow

Tue 1/9

14:05-12:21

2 stops27h 16m

Louisville Intl

Thu 17/9

06:00-06:55

1 stop19h 55m

£698
Fastest return journey

LondonLouisville

LHR - SDF

LHRSDF

London Heathrow

Tue 1/9

09:45-17:41

1 stop12h 56m

Louisville Intl

Thu 17/9

19:07-11:15

1 stop11h 08m

£707

LondonLouisville

LHR - SDF

LHRSDF

London Heathrow

Wed 16/9

10:45-20:52

2 stops15h 07m

Louisville Intl

Wed 23/9

14:15-10:20

2 stops15h 05m

£720

LondonLouisville

LHR - SDF

LHRSDF

London Heathrow

Thu 1/10

09:45-17:09

1 stop12h 24m

Louisville Intl

Sun 18/10

20:08-06:55

1 stop29h 47m

£720

LondonLouisville

LHR - SDF

LHRSDF

London Heathrow

Tue 5/5

11:30-21:20

2 stops14h 50m

Louisville Intl

Tue 12/5

11:12-06:45

2 stops14h 33m

£727

LondonLouisville

LHR - SDF

LHRSDF

London Heathrow

Mon 1/6

06:30-15:48

2 stops14h 18m

Louisville Intl

Mon 8/6

17:23-13:15

2 stops14h 52m

£747

LondonLouisville

LHR - SDF

LHRSDF

London Heathrow

Thu 17/9

07:25-18:56

2 stops16h 31m

Louisville Intl

Sun 20/9

09:00-06:55

2 stops16h 55m

£748

LondonLouisville

LHR - SDF

LHRSDF

London Heathrow

Mon 1/6

11:45-21:18

2 stops14h 33m

Louisville Intl

Mon 15/6

14:19-09:15

2 stops13h 56m

£750
Cheapest one-way

LondonLouisville

LHR - SDF

LHRSDF

London Heathrow

Thu 4/6

07:40-09:28

3 stops30h 48m

£398

LondonLouisville

LHR - SDF

LHRSDF

London Heathrow

Sun 23/8

14:10-22:22

1 stop13h 12m

£444

Flights are sorted by cheapest return flights first.

Deals found on 15/4

Showing 1-10 of 18 resultsSorted by cheapest first
1
2

Best time to book a flight from Heathrow to Louisville

Have a flexible travel schedule? Discover the best time to fly to Louisville from Heathrow with our price prediction graph.
Estimated return 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 London Heathrow Airport to Louisville

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

Use this chart to determine the optimal time to book a return flight from Heathrow to Louisville. Price data was last updated on 17 April 2026.

To ensure you get the cheapest price possible for a flight from London Heathrow Airport to Louisville, you should look to book at least 76 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 London Heathrow Airport to Louisville?

Currently, September is the cheapest month in which you can book a flight from London Heathrow Airport to Louisville (average of £517). Flying from London Heathrow Airport to Louisville in March is currently the most expensive (average of £910). 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 for a return flight from London Heathrow Airport to Louisville?

Reviews of airlines servicing Louisville

Get insights into the airlines that provide service to Louisville. 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 Louisville. Reviews last updated 19 April 2026.
Read reviews from past customers who have flown with Finnair,Virgin Atlantic, andUnited Airlines from London Heathrow Airport to Louisville. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Finnair
7.7
Good
1,390 reviews
Check prices

Entertainment

6.9

Food

6.7

Overall

7.7

Comfort

7.4

Boarding

7.7

Crew

8.2

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights
Finnair
7.7
Good
1,390 reviews
Finnair
7.7
Good
1,390 reviews
Check prices

Entertainment

6.9

Food

6.7

Overall

7.7

Comfort

7.4

Boarding

7.7

Crew

8.2

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights
Virgin Atlantic
7.5
Good
687 reviews
Finnair
7.7
Good
1,390 reviews
Check prices

Entertainment

6.9

Food

6.7

Overall

7.7

Comfort

7.4

Boarding

7.7

Crew

8.2

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights
United Airlines
7.4
Good
9,603 reviews
Finnair
7.7
Good
1,390 reviews
Check prices

Entertainment

6.9

Food

6.7

Overall

7.7

Comfort

7.4

Boarding

7.7

Crew

8.2

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights
Lufthansa
6.8
Okay
7,930 reviews
Finnair
7.7
Good
1,390 reviews
Check prices

Entertainment

6.9

Food

6.7

Overall

7.7

Comfort

7.4

Boarding

7.7

Crew

8.2

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights
British Airways
6.7
Okay
7,893 reviews
Finnair
7.7
Good
1,390 reviews
Check prices

Entertainment

6.9

Food

6.7

Overall

7.7

Comfort

7.4

Boarding

7.7

Crew

8.2

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights

Related info for your journey

Find useful and relevant information for your journey from Heathrow to Louisville. 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 into for flights to Louisville from London Heathrow?

    Most people fly into Louisville Intl (SDF) if they book a flight to Louisville from London Heathrow. On average, Louisville Intl has 0 inbound flights from London Heathrow per day from 6 airlines. Louisville Intl is conveniently located just 5.3 mi from Louisville’s city center.

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

    Airlines like United Airlines and British Airways fly from London Heathrow Airport to Louisville in about 12h 56m. The time it takes to get you to your destination can typically vary by up to 14h 20m. Airlines will cover a distance of 4033 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

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

    Flying on KLM is currently your cheapest option to Louisville, with prices starting at £466. Additional return tickets that might be worth considering are offered by United Airlines and Lufthansa, with the lowest prices starting at £477 and £479, respectively. Users have found that KLM is 30% cheaper than the other options available to this destination.

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

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

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

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

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

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

    Currently, September is the cheapest month in which you can book a flight from London Heathrow Airport to Louisville (average of £517). Flying from London Heathrow Airport to Louisville in March is currently the most expensive (average of £910). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 6 airlines flying from Heathrow to Louisville

Discover the top 6 airlines that operate flights from Heathrow to Louisville. 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 858,174 searches. Data last updated 19 April 2026.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest£466Average£660FlexibilityNo cancel feeOn-time75%
Search KLM flights
United AirlinesCheapest£477Average£658FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
LufthansaCheapest£479Average£558FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
British AirwaysCheapest£490Average£611FlexibilityNo cancel feeOn-time70%
Search British Airways flights
FinnairCheapest£491Average£578FlexibilityNo cancel feeOn-time76%
Search Finnair flights
Virgin AtlanticCheapest£506Average£676FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Heathrow to Louisville?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Heathrow to Louisville. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Heathrow to Louisville?

Millions of users choose and trust Cheapflights to book the best flight deals from Heathrow to Louisville for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Heathrow to Louisville with no change fees?

Yes! Cheapflights helps users easily find flights from Heathrow to Louisville with no change fees.

Can Cheapflights notify me if prices for flights from Heathrow to Louisville become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Louisville from Heathrow today and book when prices fit your budget.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.