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

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

What airlines fly to London Heathrow Airport?

British Airways, American Airlines and Iberia 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 48% of people opting to fly with this airline when traveling to London Heathrow Airport. Keep in mind that there are 9 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 March 2026, there are 5 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.

$248 Cheap Flights from Louisville to London Heathrow Airport in 2026

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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.

2:18 pm - 9:00 am

SDF

LHR

13h 42m

1 stop

7:50 am - 11:01 pm

LHR

SDF

20h 11m

2 stops

$676Multiple Airlines

Mon, Aug 17 - Tue, Aug 25

4:50 pm - 10:55 am

SDF

LHR

13h 05m

1 stop

9:15 am - 7:36 pm

LHR

SDF

15h 21m

1 stop

$681British Airways

Wed, Aug 26 - Wed, Sep 2

12:15 pm - 10:55 am

SDF

LHR

17h 40m

1 stop

9:15 am - 10:47 pm

LHR

SDF

18h 32m

1 stop

$696British Airways

Wed, Aug 26 - Wed, Sep 2

2:18 pm - 10:55 am

SDF

LHR

15h 37m

1 stop

6:15 am - 11:01 pm

LHR

SDF

21h 46m

2 stops

$697Multiple Airlines

Wed, Aug 26 - Wed, Sep 2

7:32 pm - 5:40 pm

SDF

LHR

17h 08m

2 stops

1:30 pm - 12:05 am

LHR

SDF

15h 35m

2 stops

$703Lufthansa

Mon, Aug 17 - Tue, Aug 25

7:32 pm - 6:40 pm

SDF

LHR

18h 08m

2 stops

8:30 am - 7:34 pm

LHR

SDF

16h 04m

2 stops

$704Lufthansa

Mon, Aug 17 - Tue, Aug 25

7:43 pm - 4:40 pm

SDF

LHR

15h 57m

2 stops

9:00 am - 10:22 pm

LHR

SDF

18h 22m

2 stops

$712Lufthansa

Wed, Aug 26 - Wed, Sep 2

5:48 pm - 1:15 pm

SDF

LHR

14h 27m

1 stop

11:45 am - 11:59 pm

LHR

SDF

17h 14m

2 stops

$718KLM

Wed, Apr 15 - Wed, Apr 22

3:36 pm - 10:15 am

SDF

LHR

13h 39m

2 stops

6:50 am - 7:22 pm

LHR

SDF

17h 32m

2 stops

$719United Airlines

Wed, May 6 - Tue, May 12

3:36 pm - 10:15 am

SDF

LHR

13h 39m

2 stops

10:50 am - 10:30 pm

LHR

SDF

16h 40m

2 stops

$720United Airlines

Wed, May 6 - Wed, May 13

Lufthansa flights from Louisville to London Heathrow Airport

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

Lufthansa

Aug 17

SDF7:32 pmLouisville Intl

17h 08m

2 stops

LHR5:40 pmLondon Heathrow

Aug 25

LHR1:30 pmLondon Heathrow

15h 35m

2 stops

SDF12:05 amLouisville Intl

$703

Lufthansa

Aug 17

SDF7:32 pmLouisville Intl

18h 08m

2 stops

LHR6:40 pmLondon Heathrow

Aug 25

LHR8:30 amLondon Heathrow

16h 04m

2 stops

SDF7:34 pmLouisville Intl

$704

Lufthansa

Aug 26

SDF7:43 pmLouisville Intl

15h 57m

2 stops

LHR4:40 pmLondon Heathrow

Sep 2

LHR9:00 amLondon Heathrow

18h 22m

2 stops

SDF10:22 pmLouisville Intl

$712

KLM flights from Louisville to London Heathrow Airport

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

KLM

Mar 8

SDF5:35 pmLouisville Intl

11h 25m

1 stop

LHR9:00 amLondon Heathrow

Mar 24

LHR12:30 pmLondon Heathrow

15h 27m

1 stop

SDF11:57 pmLouisville Intl

$713

KLM

Apr 15

SDF5:48 pmLouisville Intl

14h 27m

1 stop

LHR1:15 pmLondon Heathrow

Apr 22

LHR11:45 amLondon Heathrow

17h 14m

2 stops

SDF11:59 pmLouisville Intl

$718

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

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Mon 8/17

2:18 pm-9:00 am

1 stop13h 42m

London Heathrow

Tue 8/25

7:50 am-11:01 pm

2 stops20h 11m

$676

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 8/26

4:50 pm-10:55 am

1 stop13h 05m

London Heathrow

Wed 9/2

9:15 am-7:36 pm

1 stop15h 21m

$681

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 8/26

12:15 pm-10:55 am

1 stop17h 40m

London Heathrow

Wed 9/2

9:15 am-10:47 pm

1 stop18h 32m

$696

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 8/26

2:18 pm-10:55 am

1 stop15h 37m

London Heathrow

Wed 9/2

6:15 am-11:01 pm

2 stops21h 46m

$697

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Mon 8/17

7:32 pm-5:40 pm

2 stops17h 08m

London Heathrow

Tue 8/25

1:30 pm-12:05 am

2 stops15h 35m

$703

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Mon 8/17

7:32 pm-6:40 pm

2 stops18h 08m

London Heathrow

Tue 8/25

8:30 am-7:34 pm

2 stops16h 04m

$704

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 8/26

7:43 pm-4:40 pm

2 stops15h 57m

London Heathrow

Wed 9/2

9:00 am-10:22 pm

2 stops18h 22m

$712

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 4/15

5:48 pm-1:15 pm

1 stop14h 27m

London Heathrow

Wed 4/22

11:45 am-11:59 pm

2 stops17h 14m

$718

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 5/6

3:36 pm-10:15 am

2 stops13h 39m

London Heathrow

Tue 5/12

6:50 am-7:22 pm

2 stops17h 32m

$719

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 5/6

3:36 pm-10:15 am

2 stops13h 39m

London Heathrow

Wed 5/13

10:50 am-10:30 pm

2 stops16h 40m

$720

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 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 $619. 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 $645.

How far in advance should I book a flight to London Heathrow Airport?

You are more likely to see cheaper flights to London Heathrow Airport from Louisville when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around $894 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from Louisville for as low as $688 on momondo.

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

You could potentially save up to 50% 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 05m
Direct flights	None

The fastest flight from Louisville to London Heathrow Airport takes 10h 05m

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

Search flight deals

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 05m.
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 March 2026, there are 5 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 American Airlines, representing 40% of all bookings. The subsequent popular airlines are British Airways at 21%, Delta at 15%, and United Airlines at 12%.

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
Virgin Atlantic	PriceFrom $577	Free Cancellation	Rating 7.5 680 reviews	Search Virgin Atlantic flights
Delta	PriceFrom $588	Free Cancellation	Rating 7.9 8,240 reviews	Search Delta flights
British Airways	PriceFrom $589	Free Cancellation	Rating 6.7 7,772 reviews	Search British Airways flights
United Airlines	PriceFrom $678	Free Cancellation	Rating 7.4 9,371 reviews	Search United Airlines flights
American Airlines	PriceFrom $692	Free Cancellation	Rating 7.1 11,370 reviews	Search American Airlines flights

Gatwick

Hounslow

Milton Keynes

Luton

Dover

Slough

Stratford-upon-Avon

Crawley

Hayes

Wembley

Dartford

Brentwood

Croydon

Guildford

Harrow

Watford

Cobham

Folkestone

Romford

Stansted

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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Popular cities in the United Kingdom

Flights to London Gatwick Airportfrom $352

Flights to London City Airportfrom $532

Flights to London Stansted Airportfrom $343

Flights to London Luton Airportfrom $345

Flights to Glasgow Intl Airportfrom $352

Flights to Belfast Intl Airportfrom $521

Flights to London Southend Airportfrom $470

Flights to Belfast City Airportfrom $516

Cheap flights from Louisville to London from $248

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 7/6. 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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Lufthansa flights from Louisville to London Heathrow Airport

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

KLM flights from Louisville to London Heathrow Airport

Our best KLM 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 cheapest month to fly to London Heathrow Airport?

How far in advance should I book a flight 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

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

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to London

Popular cities in the United Kingdom

Popular flights according to clicks in the last 7 days on momondo

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According to popular flight searches on momondo this year

London Heathrow Airport flight routes

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Fly your favorite airline 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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