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Cheap flights from Louisville to London Heathrow Airport from £229

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 21/7. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — LHR
21 Apr — 28 Apr1
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 22 March 2026.

Mon 17/816:00
SDF
-
LHR
1 stop12h 35m
British Airways
Tue 25/809:15
LHR
-
SDF
1 stop13h 07m
British Airways
Deal found 17/3£593
Mon 17/818:11
SDF
-
LHR
1 stop12h 04m
Multiple Airlines
Tue 25/806:15
LHR
-
SDF
2 stops21h 46m
Multiple Airlines
Deal found 17/3£594
Mon 16/1115:24
SDF
-
LHR
2 stops19h 36m
Scandinavian Airlines
Fri 20/1106:40
LHR
-
SDF
2 stops22h 22m
Scandinavian Airlines
Deal found 17/3£614
Wed 26/816:00
SDF
-
LHR
1 stop11h 00m
British Airways
Wed 2/915:00
LHR
-
SDF
1 stop12h 47m
British Airways
Deal found 17/3£630
Wed 26/816:00
SDF
-
LHR
1 stop11h 00m
Multiple Airlines
Wed 2/907:50
LHR
-
SDF
2 stops16h 46m
Multiple Airlines
Deal found 17/3£631
Wed 9/913:18
SDF
-
LHR
1 stop20h 07m
British Airways
Tue 22/907:30
LHR
-
SDF
2 stops30h 31m
British Airways
Deal found 17/3£633
Mon 17/816:00
SDF
-
LHR
1 stop12h 35m
Multiple Airlines
Wed 26/814:45
LHR
-
SDF
1 stop13h 16m
Multiple Airlines
Deal found 18/3£635
Sun 16/818:11
SDF
-
LHR
1 stop12h 04m
Multiple Airlines
Tue 25/814:25
LHR
-
SDF
1 stop13h 41m
Multiple Airlines
Deal found 19/3£636
Mon 17/810:05
SDF
-
LHR
2 stops16h 35m
Lufthansa
Tue 25/809:30
LHR
-
SDF
2 stops14h 49m
Lufthansa
Deal found 17/3£639
Wed 26/819:43
SDF
-
LHR
2 stops16h 57m
Lufthansa
Wed 2/907:30
LHR
-
SDF
2 stops16h 49m
Lufthansa
Deal found 21/3£641

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 22 March 2026.

Round-trip from

£593

One-way from

£229

Popular in

June

Cheapest in

February

Average price

£596
British Airways
  • British Airways
  • 17/8-25/8
  • 2 total stops
  • 25h 42m total
  • Louisville to London
Search Deals
British Airways
  • British Airways
  • 21/7
  • 1 total stop
  • 10h 26m total
  • Louisville to London
Search Deals
Highest demand for flights based on searches. 23% potential increase in price (£152 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 22 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

09:15-17:22

1 stop13h 07m

£636

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 9/9

10:05-06:30

2 stops15h 25m

London Heathrow

Tue 22/9

15:20-22:57

1 stop12h 37m

£682

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Sun 3/5

19:54-11:55

1 stop11h 01m

London Heathrow

Mon 18/5

17:50-17:00

2 stops28h 10m

£705
Fastest return journey

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Sat 9/5

06:17-21:35

1 stop10h 18m

London Heathrow

Wed 13/5

12:00-19:22

1 stop12h 22m

£754

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 8/4

14:30-06:55

1 stop11h 25m

London Heathrow

Mon 13/4

15:20-23:12

1 stop12h 52m

£755

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Sat 4/4

14:50-06:55

1 stop11h 05m

London Heathrow

Sat 11/4

08:00-16:41

1 stop13h 41m

£755

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Thu 2/4

14:30-06:55

1 stop11h 25m

London Heathrow

Mon 13/4

14:05-23:59

2 stops14h 54m

£757

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Tue 19/5

14:00-10:00

2 stops15h 00m

London Heathrow

Tue 26/5

06:50-19:18

2 stops17h 28m

£763
Cheapest one-way

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Fri 31/7

11:44-06:55

2 stops14h 11m

£317

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Thu 20/8

13:36-10:40

2 stops16h 04m

£317

Flights are sorted by cheapest return flights first.

Deals found on 20/3

Showing 1-10 of 17 resultsSorted by cheapest first
1
2

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 £390). Flying from Louisville to London Heathrow Airport in June is currently the most expensive (average of £688). 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. Fly via British Airways or United Airlines 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 £390). Flying from Louisville to London Heathrow Airport in June is currently the most expensive (average of £688). 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
Luton
Hounslow
Slough
Gatwick
Ilford
Hayes
Brentford
Colchester
Guildford
Watford
Kingston upon Thames
Eastbourne
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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