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Cheap flights from Louisville to London Heathrow Airport from £248

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 1/9. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — LHR
17 Jun — 24 Jun1
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 18 May 2026.

Tue 10/1113:00
SDF
-
LHR
1 stop14h 25m
United Airlines
Thu 12/1106:50
LHR
-
SDF
2 stops14h 59m
United Airlines
Deal found 16/5£628
Mon 2/1117:20
SDF
-
LHR
1 stop12h 05m
Iberia
Fri 20/1111:25
LHR
-
SDF
2 stops16h 34m
Iberia
Deal found 16/5£651
Wed 9/910:31
SDF
-
LHR
1 stop16h 09m
Iberia
Tue 22/906:15
LHR
-
SDF
2 stops21h 43m
Iberia
Deal found 13/5£652
Sun 23/819:15
SDF
-
LHR
1 stop12h 00m
Iberia
Mon 7/919:25
LHR
-
SDF
2 stops31h 01m
Iberia
Deal found 15/5£654
Tue 10/1113:00
SDF
-
LHR
2 stops24h 30m
Scandinavian Airlines
Fri 20/1106:40
LHR
-
SDF
2 stops20h 55m
Scandinavian Airlines
Deal found 15/5£657
Wed 11/1115:24
SDF
-
LHR
2 stops21h 16m
Scandinavian Airlines
Wed 18/1106:40
LHR
-
SDF
2 stops20h 55m
Scandinavian Airlines
Deal found 12/5£660
Wed 4/1115:24
SDF
-
LHR
2 stops25h 16m
Scandinavian Airlines
Wed 11/1106:40
LHR
-
SDF
2 stops22h 22m
Scandinavian Airlines
Deal found 14/5£660
Mon 2/1115:24
SDF
-
LHR
2 stops22h 06m
Scandinavian Airlines
Mon 9/1107:05
LHR
-
SDF
3 stops20h 30m
Scandinavian Airlines
Deal found 17/5£664
Wed 9/915:54
SDF
-
LHR
1 stop12h 31m
British Airways
Tue 22/907:50
LHR
-
SDF
2 stops20h 08m
British Airways
Deal found 16/5£666

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 18 May 2026.

Round-trip from

£628

One-way from

£248

Popular in

June

Cheapest in

February

Average price

£880
United Airlines
  • United Airlines
  • 10/11-12/11
  • 3 total stops
  • 29h 24m total
  • Louisville to London
Search Deals
British Airways
  • British Airways
  • 1/9
  • 1 total stop
  • 11h 07m total
  • Louisville to London
Search Deals
Highest demand for flights based on searches. 23% potential increase in price (£156 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£20 potential savings vs. average return price).
Search Deals
Average for round-trip flights in May 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 18 May 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
Fastest return journey

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Tue 10/11

11:00-07:10

2 stops15h 10m

London Heathrow

Thu 12/11

06:50-16:49

2 stops14h 59m

£631

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Mon 17/8

15:25-13:15

1 stop16h 50m

London Heathrow

Tue 25/8

06:30-17:04

2 stops15h 34m

£679

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Sat 10/10

06:30-06:30

2 stops43h 00m

London Heathrow

Thu 15/10

07:25-00:05

2 stops21h 40m

£730

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Tue 22/9

09:25-07:10

2 stops16h 45m

London Heathrow

Sat 26/9

08:40-20:52

2 stops17h 12m

£768

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 29/7

08:10-07:15

1 stop18h 05m

London Heathrow

Tue 11/8

08:40-21:19

2 stops17h 39m

£788

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Thu 30/7

12:49-10:40

1 stop16h 51m

London Heathrow

Wed 12/8

09:55-21:29

2 stops16h 34m

£797

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Sat 8/8

06:30-21:25

1 stop9h 55m

London Heathrow

Wed 12/8

17:50-16:38

2 stops27h 48m

£807

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Sat 18/7

12:20-06:30

2 stops37h 10m

London Heathrow

Mon 27/7

09:30-10:23

2 stops29h 53m

£848

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Sun 5/7

06:00-06:55

1 stop19h 55m

London Heathrow

Sun 19/7

07:45-22:50

1 stop20h 05m

£898
Cheapest one-way

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Mon 14/9

19:30-11:20

1 stop10h 50m

£261

Flights are sorted by cheapest return flights first.

Deals found on 17/5

Showing 1-10 of 21 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?

The best time to book flights from Louisville to London Heathrow Airport is 68 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, February is the cheapest month in which you can book a flight from Louisville to London Heathrow Airport (average of £465). Flying from Louisville to London Heathrow Airport in June is currently the most expensive (average of £976). 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 15h 10m. Fly via United Airlines or Delta 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, February is the cheapest month in which you can book a flight from Louisville to London Heathrow Airport (average of £465). Flying from Louisville to London Heathrow Airport in June is currently the most expensive (average of £976). 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
Hounslow
Croydon
Wembley
Northampton
Luton
Gatwick
Slough
Ilford
Hayes
Brentford
Colchester
Romford
Watford
Kingston upon Thames
Eastbourne
Swindon
Ipswich
Southend-on-Sea
Guildford

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

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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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