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$326+ 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 7/31. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — LHR
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
1 adult, Economy
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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 July 3, 2025.

Round-trip from

$570
(Delta)

One-way from

$326
(Mytrip)

Popular in

June

Cheapest in

February

Average price

$1,182
From Louisville Intl to London Heathrow
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One-way flight from Louisville Intl to London Heathrow
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Highest demand for flights based on searches. 23% potential increase in price ($298 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($45 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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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 July 3, 2025.

This Delta deal was found by Cheapflights users on 7/3. 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.
Wed 8/274:20 pmSDF - LHR
1 stop10h 45mDelta
Wed 9/311:30 amLHR - SDF
2 stops17h 26mDelta
Deal found 7/3$570
This Virgin Atlantic deal was found by Cheapflights users on 7/3. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/2712:45 pmSDF - LHR
2 stops13h 30mVirgin Atlantic
Wed 9/311:30 amLHR - SDF
2 stops16h 12mVirgin Atlantic
Deal found 7/3$575
This KLM deal was found by Cheapflights users on 7/3. 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.
Wed 8/273:11 pmSDF - LHR
1 stop10h 34mKLM
Wed 9/33:15 pmLHR - SDF
1 stop13h 41mKLM
Deal found 7/3$579
This Gotogate deal was found by Cheapflights users on 7/3. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/239:05 amSDF - LHR
2 stops16h 25mMultiple Airlines
Tue 10/79:30 amLHR - SDF
2 stops15h 57mMultiple Airlines
Deal found 7/3$619
This United Airlines deal was found by Cheapflights users on 7/3. 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 9/211:00 pmSDF - LHR
2 stops15h 35mUnited Airlines
Tue 9/302:05 pmLHR - SDF
2 stops26h 28mUnited Airlines
Deal found 7/3$632
This Justfly.com deal was found by Cheapflights users on 7/2. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/24:51 pmSDF - LHR
1 stop14h 54mBritish Airways
Thu 9/1112:00 pmLHR - SDF
1 stop13h 50mBritish Airways
Deal found 7/2$643
This Finnair deal was found by Cheapflights users on 7/1. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/156:08 pmSDF - LHR
1 stop13h 07mFinnair
Fri 8/228:20 amLHR - SDF
1 stop16h 42mFinnair
Deal found 7/1$704
This Iberia deal was found by Cheapflights users on 7/1. 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.
Wed 7/1610:04 amSDF - LHR
1 stop16h 16mIberia
Thu 7/242:25 pmLHR - SDF
1 stop13h 45mIberia
Deal found 7/1$714
This Air Canada deal was found by Cheapflights users on 7/3. 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.
Wed 11/129:55 amSDF - LHR
2 stops16h 15mAir Canada
Mon 11/171:00 pmLHR - SDF
2 stops28h 29mAir Canada
Deal found 7/3$732

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 July 3, 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 8/27

4:20 pm-8:05 am

1 stop10h 45m

London Heathrow

Wed 9/3

11:30 am-11:56 pm

2 stops17h 26m

$570

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 8/27

12:45 pm-7:15 am

2 stops13h 30m

London Heathrow

Wed 9/3

11:30 am-10:42 pm

2 stops16h 12m

$575

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 8/27

3:11 pm-6:45 am

1 stop10h 34m

London Heathrow

Wed 9/3

3:15 pm-11:56 pm

1 stop13h 41m

$579

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Tue 9/23

9:05 am-6:30 am

2 stops16h 25m

London Heathrow

Tue 10/7

9:30 am-8:27 pm

2 stops15h 57m

$619

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Sun 9/21

1:59 pm-8:20 am

1 stop13h 21m

London Heathrow

Tue 9/30

2:05 pm-11:33 am

2 stops26h 28m

$632

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Tue 9/2

4:51 pm-12:45 pm

1 stop14h 54m

London Heathrow

Thu 9/11

12:00 pm-8:50 pm

1 stop13h 50m

$643

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Fri 8/15

6:08 pm-12:15 pm

1 stop13h 07m

London Heathrow

Fri 8/22

10:30 am-8:02 pm

1 stop14h 32m

$704

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 7/16

10:04 am-7:20 am

1 stop16h 16m

London Heathrow

Thu 7/24

2:25 pm-11:10 pm

1 stop13h 45m

$714

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 11/12

9:55 am-7:10 am

2 stops16h 15m

London Heathrow

Mon 11/17

1:00 pm-12:29 pm

2 stops28h 29m

$732

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Thu 7/31

12:32 pm-11:55 am

2 stops18h 23m

$326

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/2

Showing 1-10 of 17 results
1
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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 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 June 27, 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 $1,098). 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 July 3, 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.

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 July 3, 2025.
See what other customers who have flown with Delta, KLM, and Finnair 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.
Delta
8.0
Very good
7,982 reviews

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

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!
Delta
8.0
Very good
7,982 reviews
Delta
8.0
Very good
7,982 reviews

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

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!
KLM
7.8
Good
1,367 reviews
Delta
8.0
Very good
7,982 reviews

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

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!
Finnair
7.6
Good
1,306 reviews
Delta
8.0
Very good
7,982 reviews

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

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!
United Airlines
7.4
Good
8,861 reviews
Delta
8.0
Very good
7,982 reviews

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

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!
Virgin Atlantic
7.4
Good
654 reviews
Delta
8.0
Very good
7,982 reviews

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

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?

    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 $570. Other airlines that can offer you cheap pricing are Virgin Atlantic, from $575, and KLM, from $579. You may be able to fly from Louisville to London Heathrow Airport for 42% 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?

    $411 is the cheapest one-way deal found within the past few days, from British Airways. You may also be able to find cheap deals on Iberia and KLM, with prices starting from $415 and $437, 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 $1,098). 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
Hounslow
Hayes
Thornton Heath
Canterbury
Harrow
Dover
Stratford-upon-Avon
Gatwick
Orpington
Watford
Northampton
Croydon
Folkestone
Borehamwood
Broadway
Aylesbury
Chelmsford
Brentwood
Chichester
Swindon

Browse thousands of different options on Cheapflights for your next trip

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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 July 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$619Average$796FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$692Average$992FlexibilityNo cancel feeOn-time71%
DeltaCheapest$713Average$1,038FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$734Average$996FlexibilityNo cancel feeOn-time69%
Virgin AtlanticCheapest$776Average$1,343FlexibilityNo cancel feeOn-time72%

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