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Cheap flights from Louisville to London Heathrow Airport from £250

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 15/9. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — LHR
21 Jul — 28 Jul1
1 adult

Cheapflights Tip: The best prices from Louisville Intl to London Heathrow are usually found in February or September, booked 64 days in advance, depart on a Thursday or Wednesday and return on a Tuesday

Cheap 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 16 July 2025.

Round-trip from

£423

One-way from

£250

Popular in

June

Cheapest in

February

Average price

£886
Air France
  • Air France
  • 27/7-12/8
  • 2 total stops
  • 26h 36m total
  • Louisville to London
15/9
  • 15/9
  • 3 total stops
  • 34h 15m total
  • Louisville to London
Highest demand for flights based on searches. 24% potential increase in price (£179 potential increase over avg. return price).
Cheapest flight prices on average. 5% potential price decrease (£28 potential savings vs. average return price).
Average for round-trip flights in July 2025

Find flight deals from Louisville to Heathrow

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 16 July 2025.

Sun 27/720:14SDF - LHR
1 stop12h 16mMultiple Airlines
Tue 12/809:20LHR - SDF
1 stop14h 20mMultiple Airlines
Deal found 14/7£423
Wed 20/815:11SDF - LHR
1 stop17h 19mDelta
Tue 9/906:15LHR - SDF
2 stops17h 01mDelta
Deal found 14/7£423
Tue 12/818:00SDF - LHR
1 stop12h 10mKLM
Tue 19/815:15LHR - SDF
1 stop12h 31mKLM
Deal found 14/7£430
Wed 20/810:24SDF - LHR
2 stops15h 21mVirgin Atlantic
Tue 9/912:45LHR - SDF
2 stops14h 57mVirgin Atlantic
Deal found 14/7£433
Wed 6/811:25SDF - LHR
2 stops14h 05mUnited Airlines
Thu 21/812:15LHR - SDF
1 stop13h 47mUnited Airlines
Deal found 15/7£485
Tue 5/818:50SDF - LHR
2 stops19h 20mIberia
Wed 20/809:15LHR - SDF
1 stop18h 47mIberia
Deal found 15/7£496
Tue 5/812:30SDF - LHR
2 stops19h 10mLufthansa
Thu 21/809:30LHR - SDF
2 stops16h 32mLufthansa
Deal found 15/7£496
Mon 1/917:52SDF - LHR
2 stops31h 38mAir Canada
Wed 10/909:30LHR - SDF
2 stops17h 54mAir Canada
Deal found 15/7£505
Mon 29/918:12SDF - LHR
1 stop11h 18mBritish Airways
Mon 6/1015:00LHR - SDF
1 stop12h 28mBritish Airways
Deal found 15/7£514

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 16 July 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

Sun 27/7

20:14-13:30

1 stop12h 16m

London Heathrow

Tue 12/8

09:20-18:40

1 stop14h 20m

£423

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 20/8

15:11-13:30

1 stop17h 19m

London Heathrow

Tue 9/9

06:15-18:16

2 stops17h 01m

£423

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Tue 12/8

18:00-11:10

1 stop12h 10m

London Heathrow

Tue 19/8

15:15-22:46

1 stop12h 31m

£430

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 20/8

10:24-06:45

2 stops15h 21m

London Heathrow

Tue 9/9

12:45-22:42

2 stops14h 57m

£433

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 6/8

11:25-06:30

2 stops14h 05m

London Heathrow

Fri 15/8

14:10-22:14

1 stop13h 04m

£485

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Tue 5/8

18:50-19:10

2 stops19h 20m

London Heathrow

Thu 21/8

09:15-23:02

1 stop18h 47m

£496

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Tue 5/8

12:30-12:40

2 stops19h 10m

London Heathrow

Thu 21/8

09:30-21:02

2 stops16h 32m

£496

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Mon 1/9

17:52-06:30

2 stops31h 38m

London Heathrow

Wed 10/9

09:30-22:24

2 stops17h 54m

£505

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Mon 29/9

18:12-10:30

1 stop11h 18m

London Heathrow

Mon 6/10

15:00-22:28

1 stop12h 28m

£514

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Mon 15/9

20:40-11:55

3 stops34h 15m

£250

Flights are sorted by cheapest return flights first.

Deals found on 15/7

Showing 1-10 of 15 results
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 11 July 2025.

The best time to book flights from Louisville to London Heathrow Airport is 64 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, January is the cheapest month in which you can book a flight from Louisville to London Heathrow Airport (average of £112). Flying from Louisville to London Heathrow Airport in August is currently the most expensive (average of £164). 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 16 July 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.

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Heathrow. Reviews last updated 16 July 2025.
Read reviews from past customers who have flown with Delta, KLM, andUnited Airlines from Louisville to London Heathrow Airport. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
8.0
Very Good

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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. 2 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.

  • What are the cheapest airlines flying from Louisville to London Heathrow Airport round-trip?

    Cheapflights users have booked flights from Louisville to London Heathrow Airport round-trip from £423. Other airlines that can offer you cheap pricing are KLM, from £430, and Virgin Atlantic, from £433. You may be able to fly from Louisville to London Heathrow Airport for 41% less than the average price by searching for these airlines.

  • What are the cheapest airlines to fly from Louisville to London Heathrow Airport one-way?

    To fly one-way, consider booking your trip with United Airlines, which is currently one of the cheapest options available, starting at £306. British Airways flights start at £356 while deals on Delta start at £366 one-way.

  • 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, January is the cheapest month in which you can book a flight from Louisville to London Heathrow Airport (average of £112). Flying from Louisville to London Heathrow Airport in August is currently the most expensive (average of £164). 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
Hounslow
Deal
Northampton
Gatwick
Slough
Luton
Wembley
Crawley
Eastbourne
Ilford
Hayes
Ipswich
Southend-on-Sea
Folkestone
Watford
Winchester
Swindon
Maidstone

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 2 airlines flying from Louisville to Heathrow

Discover the top 2 airlines that operate flights from Louisville to Heathrow. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 16 July 2025.
AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapest£538Average£805FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
American AirlinesCheapest£555Average£837FlexibilityNo cancel feeOn-time71%
Search American Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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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