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Heathrow

$322+ 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 11/18. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — LHR
Jul 30 — Aug 61
Thu 7/30
Thu 8/6
1 adult, Economy
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Cheap 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 June 30, 2026.

This United Airlines deal was found by Cheapflights users on 6/25. 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.
Sun 11/153:35 pm
SDF
-
LHR
1 stop35h 05m
United Airlines
Wed 11/186:50 am
LHR
-
SDF
2 stops17h 25m
United Airlines
Deal found 6/25$779
This Iberia deal was found by Cheapflights users on 6/30. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/810:26 am
SDF
-
LHR
1 stop17h 09m
Iberia
Wed 11/186:15 am
LHR
-
SDF
2 stops20h 20m
Iberia
Deal found 6/30$858
This Iberia deal was found by Cheapflights users on 6/25. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/1512:43 pm
SDF
-
LHR
1 stop14h 52m
Iberia
Wed 11/187:35 am
LHR
-
SDF
2 stops20h 24m
Iberia
Deal found 6/25$863
This FlightHub deal was found by Cheapflights users on 6/28. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/222:47 pm
SDF
-
LHR
1 stop11h 03m
British Airways
Wed 9/307:50 am
LHR
-
SDF
2 stops20h 32m
British Airways
Deal found 6/28$878
This oojo deal was found by Cheapflights users on 6/26. 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 9/2110:29 am
SDF
-
LHR
1 stop16h 11m
British Airways
Fri 10/24:25 pm
LHR
-
SDF
1 stop23h 21m
British Airways
Deal found 6/26$879
This United Airlines deal was found by Cheapflights users on 6/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/223:35 pm
SDF
-
LHR
1 stop15h 00m
United Airlines
Thu 10/16:50 am
LHR
-
SDF
2 stops15h 50m
United Airlines
Deal found 6/29$882
This FlightHub deal was found by Cheapflights users on 6/25. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/105:00 pm
SDF
-
LHR
1 stop20h 55m
British Airways
Wed 10/1411:30 am
LHR
-
SDF
2 stops28h 17m
British Airways
Deal found 6/25$884
This Air Canada deal was found by Cheapflights users on 6/28. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/2210:23 am
SDF
-
LHR
2 stops15h 07m
Air Canada
Wed 9/3012:40 pm
LHR
-
SDF
2 stops40h 09m
Air Canada
Deal found 6/28$891
This oojo deal was found by Cheapflights users on 6/25. 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.
Sun 11/156:24 pm
SDF
-
LHR
1 stop12h 36m
British Airways
Wed 11/182:10 pm
LHR
-
SDF
1 stop12h 19m
British Airways
Deal found 6/25$892
This Mytrip deal was found by Cheapflights users on 6/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/2210:45 am
SDF
-
LHR
2 stops14h 45m
Multiple Airlines
Wed 9/3011:30 am
LHR
-
SDF
2 stops17h 29m
Multiple Airlines
Deal found 6/28$896

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 June 30, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$779
(United Airlines)

One-way from

$322
(TravelUp)

Popular in

June

Cheapest in

February

Average price

$1,345
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. 24% potential increase in price ($306 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($37 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
Search Deals

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 June 30, 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 round-trip

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Sun 11/15

3:35 pm-7:40 am

1 stop35h 05m

London Heathrow

Wed 11/18

6:50 am-7:15 pm

2 stops17h 25m

$779

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Mon 8/17

6:30 pm-12:15 pm

1 stop12h 45m

London Heathrow

Tue 8/25

12:15 pm-9:25 pm

1 stop14h 10m

$956

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Sun 8/2

11:14 am-7:15 am

1 stop15h 01m

London Heathrow

Fri 8/28

6:50 am-4:38 pm

2 stops14h 48m

$961

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Sat 9/19

10:45 am-9:20 pm

1 stop29h 35m

London Heathrow

Mon 9/28

6:50 am-11:59 pm

2 stops22h 09m

$1,017

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Mon 8/10

1:06 pm-7:15 am

1 stop13h 09m

London Heathrow

Mon 8/17

5:50 pm-4:38 pm

2 stops27h 48m

$1,020
Quickest round-trip

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Thu 8/20

6:15 am-9:20 pm

1 stop10h 05m

London Heathrow

Tue 10/13

12:15 pm-7:24 pm

1 stop12h 09m

$1,040

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 7/29

4:47 pm-11:20 am

1 stop13h 33m

London Heathrow

Tue 8/11

8:40 am-9:19 pm

2 stops17h 39m

$1,064

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 7/29

8:10 am-7:15 am

1 stop18h 05m

London Heathrow

Wed 8/5

9:55 am-9:33 pm

2 stops16h 38m

$1,064

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Fri 9/18

7:10 am-6:30 am

2 stops18h 20m

London Heathrow

Sun 9/27

12:40 pm-8:13 pm

2 stops36h 33m

$1,070

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 8/5

1:06 pm-8:20 am

1 stop14h 14m

London Heathrow

Sun 8/16

9:30 am-7:07 pm

2 stops14h 37m

$1,100

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/28

Showing 1-10 of 21 resultsSorted by cheapest first
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2
3

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 June.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy3 starsTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*1 star

*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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Louisville-London Heathrow Airport flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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

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 $630). Flying from Louisville to London Heathrow Airport in June is currently the most expensive (average of $1,345). 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 to fly round-trip from Louisville to London Heathrow Airport?

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 June 30, 2026.
See what other customers who have flown with KLM,Delta, andUnited Airlines from Louisville to London Heathrow Airport have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.8
Good
1,531 reviews

Overall

7.8

Boarding

7.8

Entertainment

7.2

Comfort

7.7

Crew

8.4

Food

7.3

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
KLM
7.8
Good
1,531 reviews
KLM
7.8
Good
1,531 reviews

Overall

7.8

Boarding

7.8

Entertainment

7.2

Comfort

7.7

Crew

8.4

Food

7.3

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
Delta
7.8
Good
8,451 reviews
KLM
7.8
Good
1,531 reviews

Overall

7.8

Boarding

7.8

Entertainment

7.2

Comfort

7.7

Crew

8.4

Food

7.3

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
United Airlines
7.4
Good
9,904 reviews
KLM
7.8
Good
1,531 reviews

Overall

7.8

Boarding

7.8

Entertainment

7.2

Comfort

7.7

Crew

8.4

Food

7.3

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
American Airlines
7.1
Good
11,762 reviews
KLM
7.8
Good
1,531 reviews

Overall

7.8

Boarding

7.8

Entertainment

7.2

Comfort

7.7

Crew

8.4

Food

7.3

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
British Airways
6.7
Okay
8,089 reviews
KLM
7.8
Good
1,531 reviews

Overall

7.8

Boarding

7.8

Entertainment

7.2

Comfort

7.7

Crew

8.4

Food

7.3

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful

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 6 different airlines.

  • How long is the flight from Louisville to London Heathrow Airport?

    United Airlines can get you from Louisville to London Heathrow Airport in just under 35h 05m. Your travel time can differ by up to . Louisville and London Heathrow Airport are separated by a distance of 4033 mi.

  • 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 $574. Other airlines that can offer you cheap pricing are Virgin Atlantic, from $577, and Delta, from $588. You may be able to fly from Louisville to London Heathrow Airport for 39% less than the average price by searching for these airlines.

  • 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, February is the cheapest month in which you can book a flight from Louisville to London Heathrow Airport (average of $630). Flying from Louisville to London Heathrow Airport in June is currently the most expensive (average of $1,345). 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 London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Ilford
Dorking
Hounslow
Winchester
Croydon
Gatwick
Southend-on-Sea
Wembley
Harrow
Eastleigh
Dartford
Dover
Orpington
Watford
Northampton
Chipping Norton
Hayes
Kingston upon Thames
Eastbourne
Slough

Browse thousands of different options on Cheapflights for your next trip

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Top 6 airlines flying from Louisville to Heathrow

Discover the top 6 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 June 30, 2026.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$574Average$716FlexibilityNo cancel feeOn-time75%
Virgin AtlanticCheapest$577Average$656FlexibilityNo cancel feeOn-time72%
DeltaCheapest$588Average$855FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$589Average$948FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$676Average$992FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$678Average$1,091FlexibilityNo cancel feeOn-time69%

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