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Cheap flights from Louisville to London Heathrow Airport from £323

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 25/4. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — LHR
28 Apr — 5 May1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Louisville to Heathrow

Enter your travel dates to find the best prices.

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 29 March 2026.

Tue 1/1213:00
SDF
-
LHR
2 stops15h 20m
Scandinavian Airlines
Tue 8/1219:30
LHR
-
SDF
2 stops32h 05m
Scandinavian Airlines
Deal found 27/3£626
Tue 1/913:00
SDF
-
LHR
3 stops24h 50m
Scandinavian Airlines
Thu 17/906:40
LHR
-
SDF
2 stops22h 19m
Scandinavian Airlines
Deal found 28/3£628
Mon 7/1215:24
SDF
-
LHR
2 stops19h 36m
Scandinavian Airlines
Thu 10/1219:30
LHR
-
SDF
2 stops32h 05m
Scandinavian Airlines
Deal found 25/3£634
Tue 18/817:50
SDF
-
LHR
1 stop13h 20m
British Airways
Tue 25/809:15
LHR
-
SDF
1 stop13h 07m
British Airways
Deal found 24/3£636
Wed 26/816:00
SDF
-
LHR
1 stop11h 00m
Multiple Airlines
Wed 2/906:15
LHR
-
SDF
2 stops21h 32m
Multiple Airlines
Deal found 25/3£636
Tue 18/819:43
SDF
-
LHR
2 stops17h 42m
Lufthansa
Tue 25/809:30
LHR
-
SDF
2 stops14h 49m
Lufthansa
Deal found 24/3£638
Sun 23/818:11
SDF
-
LHR
1 stop12h 04m
Multiple Airlines
Tue 1/915:15
LHR
-
SDF
1 stop12h 46m
Multiple Airlines
Deal found 24/3£639
Tue 8/916:00
SDF
-
LHR
1 stop12h 35m
British Airways
Tue 15/917:10
LHR
-
SDF
2 stops44h 51m
British Airways
Deal found 25/3£654
Fri 11/915:59
SDF
-
LHR
1 stop15h 51m
British Airways
Sun 13/912:20
LHR
-
SDF
2 stops39h 38m
British Airways
Deal found 27/3£662

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 29 March 2026.

Round-trip from

£628

One-way from

£323

Popular in

June

Cheapest in

February

Average price

£599
Scandinavian Airlines
  • Scandinavian Airlines
  • 1/9-17/9
  • 5 total stops
  • 47h 09m total
  • Louisville to London
Search Deals
Aer Lingus
  • Aer Lingus
  • 25/4
  • 2 total stops
  • 32h 04m total
  • Louisville to London
Search Deals
Highest demand for flights based on searches. 23% potential increase in price (£153 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£22 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

Cheapflights Fare Finder

 
Customise 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 858,174 searches. Data last updated 29 March 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 return flight

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 26/8

16:00-08:00

1 stop11h 00m

London Heathrow

Wed 2/9

07:50-22:47

2 stops19h 57m

£636

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Sun 20/9

19:07-11:15

1 stop11h 08m

London Heathrow

Sat 3/10

09:15-16:10

1 stop11h 55m

£715

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Tue 12/5

15:36-10:00

2 stops13h 24m

London Heathrow

Tue 19/5

06:50-17:00

2 stops15h 10m

£729

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Mon 20/4

12:11-12:40

2 stops19h 29m

London Heathrow

Thu 23/4

13:25-23:43

2 stops15h 18m

£742

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Tue 18/8

09:00-06:30

3 stops16h 30m

London Heathrow

Tue 25/8

08:30-00:05

3 stops20h 35m

£766

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Sat 9/5

06:17-21:25

1 stop10h 08m

London Heathrow

Wed 13/5

11:05-20:17

1 stop14h 12m

£786
Fastest return journey

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Mon 11/5

06:17-21:35

1 stop10h 18m

London Heathrow

Mon 18/5

12:15-19:42

1 stop12h 27m

£786

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Sat 25/4

15:30-07:45

1 stop35h 15m

London Heathrow

Sat 2/5

15:30-19:42

2 stops33h 12m

£792

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 20/5

09:55-06:30

2 stops15h 35m

London Heathrow

Wed 27/5

10:50-22:30

2 stops16h 40m

£800
Cheapest one-way

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Sat 6/6

20:06-21:40

3 stops44h 34m

£366

Flights are sorted by cheapest return flights first.

Deals found on 27/3

Showing 1-10 of 17 resultsSorted by cheapest first
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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 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 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 return flight from Louisville to Heathrow. Price data was last updated on 13 March 2026.

The best time to book flights from Louisville to London Heathrow Airport is 69 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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 £392). Flying from Louisville to London Heathrow Airport in June is currently the most expensive (average of £692). 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 Louisville to London Heathrow Airport?

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?

    Louisville Intl (SDF), located 5.3 mi from the city center, is the airport you fly out of when you book flights from Louisville to London Heathrow. 0 airlines have flights from Louisville Intl to London Heathrow on a regular basis. Booking flights from Louisville Intl to London Heathrow should not be difficult; the airport handles an average of 0 outbound flights to London Heathrow per day.

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

    There are many flights that can get you from Louisville to London Heathrow Airport in 11h 08m. Fly via British Airways, United Airlines, or Aer Lingus to get the fastest option. The distance between Louisville and London Heathrow Airport is about 4033 mi. Both multi-stop and direct flights can be found to your destination and back.

  • 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 holiday 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 £392). Flying from Louisville to London Heathrow Airport in June is currently the most expensive (average of £692). 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

Travelling to a place near London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Milton Keynes
Wembley
Croydon
Northampton
Hounslow
Luton
Gatwick
Slough
Ilford
Hayes
Brentford
Colchester
Eastbourne
Guildford
Watford
Kingston upon Thames
Romford
Ipswich
Swindon
Bedford

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

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Louisville to Heathrow. 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 Louisville to Heathrow?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Heathrow from Louisville.

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

Cheapflights does show flights with no change fees to all users. To see these options for flights from Louisville to Heathrow, users can toggle the no change fees filter when performing a flight search.

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

Not ready to book yet? You can track prices for flights from Louisville to Heathrow on Cheapflights with our Price Alert feature and get notified when better prices are available.

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