HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Heathrow

$409+ Cheap flights from Louisville (SDF) to Heathrow (LHR)

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 5/12. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — LHR
May 5 — May 121
Mon 5/5
Mon 5/12
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Louisville to Heathrow with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 Wednesday or Monday 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 April 30, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$719
(Delta)

One-way from

$409
(Kiwi.com)

Popular in

May

Cheapest in

February

Average price

$793
Provider with most accurate pricing for Louisville Intl-London Heathrow flight deals.
Search Deals
Provider most trusted by Cheapflights users for Louisville Intl-London Heathrow flights.
Search Deals
From Louisville Intl to London Heathrow
Search Deals
One-way flight from Louisville Intl to London Heathrow
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($75 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($21 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2025
Search Deals

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 April 30, 2025.

This Delta deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/132:59 pmSDF - LHR
1 stop17h 31mDelta
Wed 10/226:15 amLHR - SDF
2 stops16h 24mDelta
Deal found 4/29$644
This Scandinavian Airlines deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/132:59 pmSDF - LHR
2 stops21h 41mScandinavian Airlines
Wed 10/226:40 pmLHR - SDF
2 stops32h 50mScandinavian Airlines
Deal found 4/28$717
This Orbitz deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/51:30 pmSDF - LHR
2 stops50h 30mMultiple Airlines
Fri 10/36:30 amLHR - SDF
2 stops20h 54mMultiple Airlines
Deal found 4/28$725
This oojo deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/296:34 amSDF - LHR
2 stops25h 41mBritish Airways
Mon 10/67:25 pmLHR - SDF
2 stops27h 59mBritish Airways
Deal found 4/29$730
This KLM deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/612:55 pmSDF - LHR
1 stop12h 50mKLM
Thu 5/221:05 pmLHR - SDF
1 stop12h 31mKLM
Deal found 4/28$733
This United Airlines deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/51:30 pmSDF - LHR
1 stop11h 25mUnited Airlines
Fri 10/312:40 pmLHR - SDF
2 stops27h 54mUnited Airlines
Deal found 4/28$760
This Travelocity deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/42:37 pmSDF - LHR
1 stop11h 43mIberia
Sat 10/119:15 amLHR - SDF
1 stop14h 09mIberia
Deal found 4/29$793
This Mytrip deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/2710:17 amSDF - LHR
3 stops29h 43mAir Canada
Tue 6/35:40 pmLHR - SDF
2 stops31h 46mAir Canada
Deal found 4/29$936
This EaseMyTrip deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure EaseMyTrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/212:55 pmSDF - LHR
1 stop19h 35mVirgin Atlantic
Sun 5/1111:45 amLHR - SDF
1 stop14h 41mVirgin Atlantic
Deal found 4/28$1,008
This Gurufare deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/1712:48 pmSDF - LHR
1 stop12h 07mLufthansa
Mon 7/289:30 amLHR - SDF
2 stops16h 36mLufthansa
Deal found 4/28$1,095
This American Airlines deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/218:15 pmSDF - LHR
1 stop11h 15mAmerican Airlines
Mon 5/263:00 pmLHR - SDF
1 stop11h 53mAmerican Airlines
Deal found 4/28$1,099
This Gurufare deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/176:54 pmSDF - LHR
2 stops13h 31mAer Lingus
Fri 8/229:10 pmLHR - SDF
2 stops26h 14mAer Lingus
Deal found 4/28$1,202

Cheapflights Fare Finder

Customize 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 2,558,603 searches. Data last updated April 30, 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

Mon 10/13

2:59 pm-1:30 pm

1 stop17h 31m

London Heathrow

Wed 10/22

6:15 am-5:39 pm

2 stops16h 24m

$644

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Mon 10/13

2:59 pm-5:40 pm

2 stops21h 41m

London Heathrow

Wed 10/22

6:40 pm-10:30 pm

2 stops32h 50m

$717

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Fri 9/5

1:30 pm-9:00 pm

2 stops50h 30m

London Heathrow

Fri 10/3

6:30 am-10:24 pm

2 stops20h 54m

$725

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Mon 9/29

6:34 am-1:15 pm

2 stops25h 41m

London Heathrow

Mon 10/6

7:25 pm-6:24 pm

2 stops27h 59m

$730

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Tue 9/2

12:40 pm-6:45 am

1 stop13h 05m

London Heathrow

Thu 9/11

1:05 pm-10:30 pm

1 stop14h 25m

$733

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Fri 9/5

1:30 pm-5:55 am

1 stop11h 25m

London Heathrow

Fri 10/3

12:40 pm-11:34 am

2 stops27h 54m

$760

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Sat 10/4

2:37 pm-7:20 am

1 stop11h 43m

London Heathrow

Sat 10/11

9:15 am-6:24 pm

1 stop14h 09m

$793

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Tue 5/27

10:17 am-9:00 pm

3 stops29h 43m

London Heathrow

Tue 6/3

5:40 pm-8:26 pm

2 stops31h 46m

$936

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Thu 7/17

12:48 pm-5:55 am

1 stop12h 07m

London Heathrow

Mon 7/28

9:30 am-9:06 pm

2 stops16h 36m

$1,095

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 5/21

8:15 pm-12:30 pm

1 stop11h 15m

London Heathrow

Mon 5/26

3:00 pm-9:53 pm

1 stop11h 53m

$1,099

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

Showing 1-10 of 17 results
1
2

Compare providers for flights from Louisville to Heathrow

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Louisville to Heathrow in April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*2 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Louisville-London Heathrow Airport flights, users find the pricing of AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Louisville-London Heathrow Airport flight deals on Cheapflights vs. AranGrant >95% of the time. Price accuracy is based on data collected from Louisville-London Heathrow Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Louisville-London Heathrow Airport flights, Cheapflights users trust AranGrant the most. AranGrant has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Louisville-London Heathrow Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 round-trip 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 round-trip flight from Louisville to Heathrow. Price data was last updated on April 25, 2025.

To ensure you get the cheapest price possible for a flight from Louisville to London Heathrow Airport, you should look to book at least 64 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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 $661). Flying from Louisville to London Heathrow Airport in June is currently the most expensive (average of $1,110). 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 April 30, 2025.

A simple way to save on the total cost of your ticket is to fly from Louisville to London Heathrow Airport in the evening. If you’re flexible enough to do this you can expect to save up to 15% on your trip compared to booking a flight at noon.

What is the cheapest day to fly from Louisville to London Heathrow Airport?

Use this chart to determine the cheapest time to fly round-trip from Louisville to Heathrow. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Louisville to London Heathrow Airport flight should consider departing on Wednesday evenings when fares are most often at their lowest. Friday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in Heathrow by month

Plan your trip to Heathrow by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in London Heathrow Airport ranges from 1.6 - 2.8 inches per month. January is typically the wettest month, when rainfall can reach 2.8 in. July is typically the driest time to visit London Heathrow Airport when rainfall is around 1.6 in.

Temperature in Heathrow by month

Plan your trip to Heathrow by taking into account the average temperature totals by month.

If weather is an important factor for your trip to London Heathrow Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 39.2 F).

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 April 30, 2025.
Delta
8.0
Very good
7,929 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,929 reviews
Delta
8.0
Very good
7,929 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,334 reviews
Delta
8.0
Very good
7,929 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,696 reviews
Delta
8.0
Very good
7,929 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Virgin Atlantic
7.4
Good
642 reviews
Delta
8.0
Very good
7,929 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Scandinavian Airlines
7.3
Good
1,349 reviews
Delta
8.0
Very good
7,929 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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?

    If you book a flight to London Heathrow from Louisville, you will be flying from Louisville Intl, which is the city’s only airport. Louisville Intl (SDF) is located 5.3 mi from the center of Louisville. There are 0 flights from Louisville Intl to London Heathrow per day from 5 different airlines.

  • 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 $719. Other airlines that can offer you cheap pricing are KLM, from $733, and United Airlines, from $827. You may be able to fly from Louisville to London Heathrow Airport for 24% 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?

    $461 is the cheapest one-way deal found within the past few days, from Delta. You may also be able to find cheap deals on Aer Lingus and British Airways, with prices starting from $573 and $599, respectively.

  • 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 vacation 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 $661). Flying from Louisville to London Heathrow Airport in June is currently the most expensive (average of $1,110). 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

Traveling to a place near Louisville?

Book flights to Louisville if you plan to visit one of these locations
Hayes
Hounslow
Thornton Heath
Luton
Horley
Canterbury
Harrow
Wembley
Dover
Stratford-upon-Avon
Gatwick
Orpington
Watford
Northampton
Croydon
Borehamwood
Folkestone
Ilford
Broadway
Aylesbury

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 5 airlines flying from Louisville to Heathrow

Discover the top 5 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 2,558,603 searches. Data last updated April 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$704Average$1,038FlexibilityNo cancel feeOn-time70%
DeltaCheapest$710Average$994FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$728Average$950FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$734Average$996FlexibilityNo cancel feeOn-time69%
Virgin AtlanticCheapest$777Average$1,242FlexibilityNo cancel feeOn-time72%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.