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Cheap flights from Louisville to London Heathrow Airport from £166

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 25/3. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — LHR
4 Jan — 11 Jan1
1 adult
1 adult, Economy, 0 bags

Cheapflights Tip: The best prices from Louisville Intl to London Heathrow are usually found in February or October, booked 69 days in advance, depart on a Thursday or Wednesday and return on a Tuesday

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 5 December 2025.

Thu 25/1205:40SDF - LHR
2 stops20h 30mUnited Airlines
Thu 1/107:30LHR - SDF
2 stops16h 41mUnited Airlines
Deal found 4/12£842
Sat 20/1219:24SDF - LHR
1 stop11h 36mMultiple Airlines
Sat 27/1209:55LHR - SDF
1 stop13h 35mMultiple Airlines
Deal found 3/12£918
Thu 25/1214:00SDF - LHR
1 stop10h 55mLufthansa
Thu 1/107:30LHR - SDF
2 stops16h 41mLufthansa
Deal found 4/12£925
Tue 23/1219:24SDF - LHR
1 stop30h 56mBritish Airways
Sat 27/1215:45LHR - SDF
1 stop12h 45mBritish Airways
Deal found 3/12£944
Tue 23/1214:00SDF - LHR
2 stops36h 10mMultiple Airlines
Sat 27/1206:35LHR - SDF
2 stops39h 53mMultiple Airlines
Deal found 3/12£1,029
Tue 23/1218:11SDF - LHR
1 stop30h 44mUnited Airlines
Sat 27/1206:50LHR - SDF
2 stops15h 38mUnited Airlines
Deal found 3/12£1,040
Thu 25/1215:44SDF - LHR
1 stop12h 31mMultiple Airlines
Thu 1/109:55LHR - SDF
1 stop13h 26mMultiple Airlines
Deal found 4/12£1,049
Sat 20/1205:40SDF - LHR
2 stops21h 50mAir Canada
Sat 27/1213:25LHR - SDF
2 stops28h 48mAir Canada
Deal found 3/12£1,127

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 5 December 2025.

Round-trip from

£420

One-way from

£166

Popular in

June

Cheapest in

February

Average price

£896
Lufthansa
  • Lufthansa
  • 10/1-17/1
  • 3 total stops
  • 30h 40m total
  • Louisville to London
Search Deals
British Airways
  • British Airways
  • 25/3
  • 1 total stop
  • 13h 30m total
  • Louisville to London
Search Deals
Highest demand for flights based on searches. 24% potential increase in price (£176 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£29 potential savings vs. average return price).
Search Deals
Average for round-trip flights in December 2025
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 5 December 2025.
Use the filters below to find and compare flights from Louisville to London Heathrow Airport that are best for you.

Fly from

Louisville

Fly to

Heathrow

Route

Depart

Return

Price

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 18/2

10:18-06:50

2 stops15h 32m

London Heathrow

Wed 25/2

11:45-21:14

2 stops14h 29m

£453

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Mon 13/4

07:00-06:30

1 stop18h 30m

London Heathrow

Thu 23/4

06:15-17:41

2 stops16h 26m

£460

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 15/4

12:40-13:30

1 stop19h 50m

London Heathrow

Thu 23/4

06:30-21:37

2 stops20h 07m

£461

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Sun 12/4

06:40-13:10

1 stop25h 30m

London Heathrow

Thu 23/4

06:30-17:41

2 stops16h 11m

£461

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Tue 14/4

14:15-08:55

1 stop13h 40m

London Heathrow

Thu 23/4

06:30-21:37

2 stops20h 07m

£461

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Mon 6/4

19:37-11:10

1 stop10h 33m

London Heathrow

Wed 15/4

09:20-19:01

1 stop14h 41m

£465

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 15/4

16:30-09:15

1 stop11h 45m

London Heathrow

Wed 22/4

12:25-22:50

1 stop15h 25m

£465

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Tue 14/4

10:10-06:30

1 stop15h 20m

London Heathrow

Wed 22/4

10:55-20:52

1 stop14h 57m

£465

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 15/4

14:59-13:30

1 stop17h 31m

London Heathrow

Tue 21/4

10:55-19:01

1 stop13h 06m

£465

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Sun 18/1

09:50-06:40

1 stop15h 50m

London Heathrow

Sun 25/1

06:50-17:37

2 stops15h 47m

£469

Flights are sorted by cheapest return flights first.

Deals found on 3/12

Showing 1-10 of 20 results
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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 28 November 2025.

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.

What is the cheapest time of day to fly from SDF to LHR?

Find hourly flight availability from Louisville to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 5 December 2025.

It’s typically best to fly out from Louisville to London Heathrow Airport at midday. Doing so could potentially save you 30% on the flight price compared to flying in the morning, which is usually more expensive.

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 32m. Fly via Virgin Atlantic 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, 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
Croydon
Northampton
Hounslow
Slough
Gatwick
Luton
Ilford
Wembley
Colchester
Brentford
Watford
Hayes
Crawley
Deal
Winchester
Swindon
Romford
Bedford
Chichester

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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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