What is the cheapest airline that flies from Louisville Intl to London Heathrow?

British Airways, United Airlines, and Aer Lingus are the most popular carriers operating from Louisville Intl to London Heathrow

What airlines fly to London Heathrow Airport?

British Airways, American Airlines and Delta are the top three most popular airlines that fly to London Heathrow Airport from Louisville according to our data. British Airways is the first choice among our users, with 55% of people opting to fly with this airline when traveling to London Heathrow Airport. Keep in mind that there are 10 different airlines that fly to London Heathrow Airport on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Louisville Intl Airport to London Heathrow Airport?

Prices for flights from Louisville Intl Airport to London Heathrow Airport refresh daily.

How many operators does momondo search for flights from Louisville Intl Airport to London Heathrow Airport?

As of July 2026, there are 6 operators available to choose from for flights from Louisville Intl Airport to London Heathrow Airport.

How old do you have to be to fly from Louisville Intl Airport to London Heathrow Airport?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Louisville Intl Airport to London Heathrow Airport.

What documentation or ID do you need to fly to London Heathrow Airport?

The travel and health documents you'll need for your trip to London Heathrow Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at London Heathrow Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$324 Cheap Flights from Louisville to London Heathrow Airport in 2026

Q: What is the typical price of a round-trip flight between Louisville and London Heathrow Airport?

Prices are currently low for flights on this route. Typical prices usually range from $1,070 to $1,418. The lowest price recently found on this route was $859.

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Louisville to London

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

10:26 am - 8:35 am

SDF

LHR

18h 09m

1 stop

7:30 am - 9:35 pm

LHR

SDF

19h 05m

2 stops

$859Iberia

Tue, Oct 27 - Tue, Nov 3

2:47 pm - 6:50 am

SDF

LHR

11h 03m

1 stop

7:50 am - 11:22 pm

LHR

SDF

20h 32m

2 stops

$877British Airways

Tue, Sep 22 - Wed, Sep 30

5:59 pm - 12:15 pm

SDF

LHR

13h 16m

1 stop

7:50 am - 11:22 pm

LHR

SDF

20h 32m

2 stops

$878British Airways

Tue, Sep 22 - Wed, Sep 30

3:37 pm - 7:55 am

SDF

LHR

35h 18m

1 stop

6:50 am - 5:40 pm

LHR

SDF

15h 50m

2 stops

$880United Airlines

Fri, Oct 9 - Mon, Oct 12

6:30 pm - 10:25 am

SDF

LHR

10h 55m

1 stop

10:50 am - 11:59 pm

LHR

SDF

18h 09m

2 stops

$883United Airlines

Mon, Oct 5 - Wed, Oct 14

1:50 pm - 9:00 am

SDF

LHR

14h 10m

1 stop

6:50 am - 5:40 pm

LHR

SDF

15h 50m

2 stops

$884United Airlines

Sun, Sep 27 - Tue, Oct 6

1:50 pm - 8:30 am

SDF

LHR

13h 40m

1 stop

12:05 pm - 8:41 pm

LHR

SDF

37h 36m

2 stops

$885United Airlines

Mon, Oct 19 - Mon, Nov 2

1:47 pm - 7:10 am

SDF

LHR

13h 23m

2 stops

6:50 am - 7:01 pm

LHR

SDF

17h 11m

2 stops

$887United Airlines

Tue, Oct 27 - Tue, Nov 3

11:13 am - 6:55 am

SDF

LHR

14h 42m

2 stops

10:50 am - 11:59 pm

LHR

SDF

18h 09m

2 stops

$888United Airlines

Mon, Oct 5 - Wed, Oct 14

5:59 pm - 10:50 am

SDF

LHR

11h 51m

1 stop

2:25 pm - 10:33 pm

LHR

SDF

13h 08m

1 stop

$889British Airways

Mon, Sep 21 - Fri, Oct 2

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Delta flights from Louisville to London Heathrow Airport

Our best Delta deals on Louisville to London Heathrow Airport flight tickets

Delta

Sep 21

SDF8:09 amLouisville Intl

18h 06m

1 stop

LHR7:15 amLondon Heathrow

Oct 2

LHR8:40 amLondon Heathrow

16h 53m

2 stops

SDF8:33 pmLouisville Intl

$918

Delta

Sep 27

SDF2:47 pmLouisville Intl

14h 33m

2 stops

LHR10:20 amLondon Heathrow

Oct 6

LHR9:55 amLondon Heathrow

16h 19m

2 stops

SDF9:14 pmLouisville Intl

$923

Delta

Jul 10

SDF7:49 pmLouisville Intl

12h 16m

1 stop

LHR1:05 pmLondon Heathrow

Jul 19

LHR8:40 amLondon Heathrow

17h 32m

2 stops

SDF9:12 pmLouisville Intl

$1,439

United Airlines flights from Louisville to London Heathrow Airport

Our best United Airlines deals on Louisville to London Heathrow Airport flight tickets

United Airlines

Oct 9

SDF3:37 pmLouisville Intl

35h 18m

1 stop

LHR7:55 amLondon Heathrow

Oct 12

LHR6:50 amLondon Heathrow

15h 50m

2 stops

SDF5:40 pmLouisville Intl

$880

United Airlines

Oct 5

SDF6:30 pmLouisville Intl

10h 55m

1 stop

LHR10:25 amLondon Heathrow

Oct 14

LHR10:50 amLondon Heathrow

18h 09m

2 stops

SDF11:59 pmLouisville Intl

$883

United Airlines

Sep 27

SDF1:50 pmLouisville Intl

14h 10m

1 stop

LHR9:00 amLondon Heathrow

Oct 6

LHR6:50 amLondon Heathrow

15h 50m

2 stops

SDF5:40 pmLouisville Intl

$884

momondo Fare Finder

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

Tue 10/27

10:26 am-8:35 am

1 stop18h 09m

London Heathrow

Tue 11/3

7:30 am-9:35 pm

2 stops19h 05m

$859

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Tue 9/22

2:47 pm-6:50 am

1 stop11h 03m

London Heathrow

Wed 9/30

7:50 am-11:22 pm

2 stops20h 32m

$877

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Tue 9/22

5:59 pm-12:15 pm

1 stop13h 16m

London Heathrow

Wed 9/30

7:50 am-11:22 pm

2 stops20h 32m

$878

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Fri 10/9

3:37 pm-7:55 am

1 stop35h 18m

London Heathrow

Mon 10/12

6:50 am-5:40 pm

2 stops15h 50m

$880

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Mon 10/5

6:30 pm-10:25 am

1 stop10h 55m

London Heathrow

Wed 10/14

10:50 am-11:59 pm

2 stops18h 09m

$883

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Sun 9/27

1:50 pm-9:00 am

1 stop14h 10m

London Heathrow

Tue 10/6

6:50 am-5:40 pm

2 stops15h 50m

$884

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Mon 10/19

1:50 pm-8:30 am

1 stop13h 40m

London Heathrow

Mon 11/2

12:05 pm-8:41 pm

2 stops37h 36m

$885

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Tue 10/27

1:47 pm-7:10 am

2 stops13h 23m

London Heathrow

Tue 11/3

6:50 am-7:01 pm

2 stops17h 11m

$887

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Mon 10/5

11:13 am-6:55 am

2 stops14h 42m

London Heathrow

Wed 10/14

10:50 am-11:59 pm

2 stops18h 09m

$888

Quickest round-trip

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Mon 9/21

5:59 pm-10:50 am

1 stop11h 51m

London Heathrow

Fri 10/2

2:25 pm-10:33 pm

1 stop13h 08m

$889

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Louisville to London Heathrow Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the typical price of a round-trip flight between Louisville and London Heathrow Airport?

What is the cheapest month to fly to London Heathrow Airport?

The month of February is, on average, the cheapest month to fly to London Heathrow Airport from Louisville, with most prices found around $630. If you’re not able to fly to London Heathrow Airport in February, then January is your next best option. Flight prices from Louisville to London Heathrow Airport during January average around $655.

Can stopping save me money on Louisville to London Heathrow Airport flights?

You could potentially save up to 25% on your flight if you consider stops on a Louisville to London Heathrow Airport flight.

When to book flights from Louisville to London Heathrow Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Louisville to London Heathrow Airport according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Louisville to London Heathrow Airport (SDF to LHR) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Louisville to London Heathrow Airport

Fastest flight time	10h 00m
Direct flights	None

The fastest flight from Louisville to London Heathrow Airport takes 10h 00m

There are no direct flights from Louisville to London Heathrow Airport. There are no popular flight routes from Louisville to London Heathrow Airport.

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Frequently asked questions about flying from Louisville to London Heathrow Airport

How far is Louisville Intl to London Heathrow by plane?
A flight from Louisville Intl to London Heathrow will travel around 4030.3 mi. By plane, this route typically takes 10h 00m.
When did momondo last update prices for flights from Louisville Intl Airport to London Heathrow Airport?
Prices for flights from Louisville Intl Airport to London Heathrow Airport refresh daily.
How many operators does momondo search for flights from Louisville Intl Airport to London Heathrow Airport?
As of July 2026, there are 6 operators available to choose from for flights from Louisville Intl Airport to London Heathrow Airport.
How old do you have to be to fly from Louisville Intl Airport to London Heathrow Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Louisville Intl Airport to London Heathrow Airport.
What documentation or ID do you need to fly to London Heathrow Airport?
The travel and health documents you'll need for your trip to London Heathrow Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at London Heathrow Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from Louisville to London Heathrow Airport?
momondo data reveals that the most frequently booked airline on the route from Louisville to London Heathrow Airport is British Airways, representing 34% of all bookings. The subsequent popular airlines are American Airlines at 18%, United Airlines at 16%, and Delta at 15%.

Best airlines flying from Louisville to London Heathrow Airport

Compare and see reviews for airlines that fly from Louisville to London Heathrow Airport with momondo

Airline	Rating	Free Cancellation	Price
KLM	PriceFrom $574	Free Cancellation	Rating 7.8 1,534 reviews	Search KLM flights
Virgin Atlantic	PriceFrom $577	Free Cancellation	Rating 7.5 692 reviews	Search Virgin Atlantic flights
Delta	PriceFrom $588	Free Cancellation	Rating 7.8 8,450 reviews	Search Delta flights
British Airways	PriceFrom $606	Free Cancellation	Rating 6.7 8,104 reviews	Search British Airways flights
American Airlines	PriceFrom $676	Free Cancellation	Rating 7.1 11,785 reviews	Search American Airlines flights
United Airlines	PriceFrom $678	Free Cancellation	Rating 7.4 9,951 reviews	Search United Airlines flights

Hounslow

Gatwick

Milton Keynes

Luton

Hayes

Dover

Crawley

Wembley

Croydon

Stansted

Stratford-upon-Avon

Harrow

Slough

Watford

Brentwood

Ilford

Cobham

Folkestone

Guildford

Romford

Why use momondo?

Why should I use momondo to find a flight deal from Louisville to London?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Louisville to London for you.

Can I find flights from Louisville to London with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Louisville to London flights to just show those with flexible booking policies.

How can momondo help me find flights from Louisville to London?

Once you have performed a search for Louisville to London flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Louisville to London right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Louisville to London flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

An easier way to manage your London Heathrow Airport trip

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Flights to London Gatwick Airportfrom $369

Flights to London Stansted Airportfrom $482

Flights to London City Airportfrom $607

Flights to London Luton Airportfrom $504

Flights to Glasgow Intl Airportfrom $508

Flights to Belfast Intl Airportfrom $559

Flights to London Southend Airportfrom $584

Flights to Belfast City Airportfrom $732

Cheap flights from Louisville to London from $324

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Louisville to London departing on 11/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Delta flights from Louisville to London Heathrow Airport

Our best Delta deals on Louisville to London Heathrow Airport flight tickets

United Airlines flights from Louisville to London Heathrow Airport

Our best United Airlines deals on Louisville to London Heathrow Airport flight tickets

momondo Fare Finder

Use the filters below to find and compare flights from Louisville to London Heathrow Airport that are best for you.

See travel insights to London from

How to get the cheapest flight ticket from Louisville to London Heathrow Airport

What is the typical price of a round-trip flight between Louisville and London Heathrow Airport?

What is the cheapest month to fly to London Heathrow Airport?

Can stopping save me money on Louisville to London Heathrow Airport flights?

What is the cheapest airline that flies from Louisville Intl to London Heathrow?

What airlines fly to London Heathrow Airport?

When to book flights from Louisville to London Heathrow Airport

Cheap Louisville to London Heathrow Airport (SDF to LHR) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Louisville to London Heathrow Airport

Fastest flight time

Direct flights

Frequently asked questions about flying from Louisville to London Heathrow Airport

Best airlines flying from Louisville to London Heathrow Airport

Compare and see reviews for airlines that fly from Louisville to London Heathrow Airport with momondo

Traveling to a place near London?

Why use momondo?

An easier way to manage your London Heathrow Airport trip

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Find better results for your trip to London

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List of cabin classes available on flights landing in London. Availability may vary depending on flight origin and airline.

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