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Cheap flights from Louisville to London Heathrow Airport from £238

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 2/12. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — LHR
16 Sep — 23 Sep1
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 17 August 2026.

Mon 16/1111:15 -
1 stop16h 55m
Wed 18/1106:50 -
2 stops15h 47m
Deal found 11/8£572
Wed 4/1110:03 -
1 stop17h 32m
Wed 11/1107:35 -
2 stops19h 01m
Deal found 13/8£618
Sun 15/1110:03 -
1 stop17h 32m
Mon 23/1115:00 -
2 stops35h 39m
Deal found 12/8£626
Tue 20/1018:07 -
1 stop13h 08m
Thu 29/1007:30 -
2 stops18h 05m
Deal found 12/8£637
Wed 4/1110:37 -
2 stops15h 33m
Wed 11/1111:10 -
2 stops17h 20m
Deal found 13/8£637
Wed 4/1113:25 -
1 stop15h 35m
Wed 11/1111:55 -
1 stop14h 15m
Deal found 13/8£642
Wed 21/1010:16 -
1 stop16h 39m
Mon 26/1019:40 -
2 stops29h 55m
Deal found 14/8£645
Tue 1/1210:03 -
2 stops21h 02m
Tue 8/1212:35 -
1 stop14h 00m
Deal found 14/8£647
Tue 29/911:15 -
1 stop13h 40m
Tue 6/1006:50 -
2 stops15h 50m
Deal found 14/8£654

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 17 August 2026.

Round-trip from

£572

One-way from

£238

Popular in

July

Cheapest in

February

Average price

£733
United Airlines
  • United Airlines
  • 16/11-18/11
  • 3 total stops
  • 31h 47m total
  • Louisville to London
Search Deals
British Airways
  • British Airways
  • 2/12
  • 1 total stop
  • 16h 11m total
  • Louisville to London
Search Deals
Highest demand for flights based on searches. 18% potential increase in price (£123 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£19 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 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 17 August 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 Louisville Intl - LHR London Heathrow

SDFLHR

Louisville Intl

Mon 16/11

11:15-09:10

1 stop16h 55m

London Heathrow

Wed 18/11

06:50-17:37

2 stops15h 47m

£572

LouisvilleLondon

SDF Louisville Intl - LHR London Heathrow

SDFLHR

Louisville Intl

Wed 30/12

14:45-06:40

1 stop10h 55m

London Heathrow

Wed 6/1

11:05-16:49

2 stops34h 44m

£686

LouisvilleLondon

SDF Louisville Intl - LHR London Heathrow

SDFLHR

Louisville Intl

Wed 11/11

11:15-07:10

2 stops14h 55m

London Heathrow

Sun 15/11

06:50-18:32

2 stops16h 42m

£716

LouisvilleLondon

SDF Louisville Intl - LHR London Heathrow

SDFLHR

Louisville Intl

Sat 7/11

14:15-10:50

2 stops15h 35m

London Heathrow

Fri 13/11

11:05-17:00

2 stops34h 55m

£742

LouisvilleLondon

SDF Louisville Intl - LHR London Heathrow

SDFLHR

Louisville Intl

Fri 11/9

06:15-21:25

1 stop10h 10m

London Heathrow

Fri 18/9

06:50-22:59

2 stops21h 09m

£750

LouisvilleLondon

SDF Louisville Intl - LHR London Heathrow

SDFLHR

Louisville Intl

Sat 12/9

18:10-20:40

1 stop21h 30m

London Heathrow

Sat 26/9

06:50-17:40

2 stops15h 50m

£750

LouisvilleLondon

SDF Louisville Intl - LHR London Heathrow

SDFLHR

Louisville Intl

Fri 11/12

10:00-06:40

1 stop15h 40m

London Heathrow

Sun 27/12

07:30-22:39

2 stops20h 09m

£767
Fastest return journey

LouisvilleLondon

SDF Louisville Intl - LHR London Heathrow

SDFLHR

Louisville Intl

Sun 20/9

19:54-13:05

1 stop12h 11m

London Heathrow

Sat 3/10

06:30-19:30

2 stops18h 00m

£775
Cheapest one-way

LouisvilleLondon

SDF Louisville Intl - LHR London Heathrow

SDFLHR

Louisville Intl

Wed 2/12

10:00-05:55

2 stops14h 55m

£257

LouisvilleLondon

SDF Louisville Intl - LHR London Heathrow

SDFLHR

Louisville Intl

Thu 3/12

12:20-09:10

2 stops15h 50m

£294

Flights are sorted by cheapest return flights first.

Deals found on 14/8

Showing 1-10 of 16 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

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 July is currently the most expensive (average of £1,001). 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?

Airfare is below average for this route at the moment.

Louisville to London Heathrow Airport flights typically cost between £708 and £870 in November.
The cheapest return price found within the last 5 days was £572 on United Airlines (16 Nov–18 Nov).

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 16h 55m. Fly via United Airlines to get the fastest option. The distance between Louisville and London Heathrow Airport is about 4033 mi.

  • 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 July is currently the most expensive (average of £1,001). 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
Hounslow
Milton Keynes
Luton
Gatwick
Wembley
Ilford
Slough
Hayes
Croydon
Colchester
Brentford
Eastbourne
Northampton
Watford
Southend-on-Sea
Swindon
Enfield
Kingston upon Thames
Southall
Poole

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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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