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

Iberia and British Airways 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 50% 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.

$277 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.

8:06 pm - 12:50 pm

SDF

LHR

11h 44m

1 stop

3:00 pm - 11:55 pm

LHR

SDF

13h 55m

1 stop

$743British Airways

Mon, Aug 17 - Tue, Aug 25

4:00 pm - 8:00 am

SDF

LHR

11h 00m

1 stop

6:15 am - 10:47 pm

LHR

SDF

21h 32m

2 stops

$744Multiple Airlines

Mon, Aug 17 - Tue, Aug 25

2:18 pm - 9:00 am

SDF

LHR

13h 42m

1 stop

9:45 am - 11:01 pm

LHR

SDF

18h 16m

1 stop

$748Finnair

Mon, Aug 17 - Tue, Aug 25

2:18 pm - 9:00 am

SDF

LHR

13h 42m

1 stop

10:05 am - 8:01 pm

LHR

SDF

14h 56m

1 stop

$749Finnair

Wed, Aug 5 - Fri, Aug 21

12:40 pm - 12:50 pm

SDF

LHR

19h 10m

1 stop

11:00 am - 7:39 pm

LHR

SDF

13h 39m

1 stop

$750Finnair

Wed, Sep 9 - Tue, Sep 22

11:16 am - 10:30 am

SDF

LHR

18h 14m

1 stop

6:15 am - 9:30 pm

LHR

SDF

20h 15m

2 stops

$776Iberia

Wed, May 6 - Wed, May 13

3:36 pm - 8:30 am

SDF

LHR

11h 54m

1 stop

6:50 am - 7:22 pm

LHR

SDF

17h 32m

2 stops

$778United Airlines

Wed, May 6 - Wed, May 13

4:00 pm - 9:35 am

SDF

LHR

12h 35m

1 stop

12:15 pm - 11:01 pm

LHR

SDF

15h 46m

1 stop

$779Multiple Airlines

Wed, Aug 26 - Wed, Sep 2

2:00 pm - 10:00 am

SDF

LHR

15h 00m

2 stops

10:50 am - 10:30 pm

LHR

SDF

16h 40m

2 stops

$782United Airlines

Wed, May 6 - Wed, May 13

6:11 pm - 12:15 pm

SDF

LHR

13h 04m

1 stop

6:15 am - 11:01 pm

LHR

SDF

21h 46m

2 stops

$788Iberia

Mon, Aug 17 - Tue, Aug 25

Lufthansa flights from Louisville to London Heathrow Airport

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

Lufthansa

May 3

SDF7:54 pmLouisville Intl

18h 46m

2 stops

LHR7:40 pmLondon Heathrow

May 19

LHR9:00 amLondon Heathrow

19h 59m

2 stops

SDF11:59 pmLouisville Intl

$791

Lufthansa

Apr 15

SDF1:55 pmLouisville Intl

15h 45m

2 stops

LHR10:40 amLondon Heathrow

Apr 22

LHR10:50 amLondon Heathrow

17h 22m

2 stops

SDF11:12 pmLouisville Intl

$800

Lufthansa

Sep 9

SDF7:43 pmLouisville Intl

16h 57m

2 stops

LHR5:40 pmLondon Heathrow

Sep 22

LHR7:25 amLondon Heathrow

19h 57m

2 stops

SDF10:22 pmLouisville Intl

$801

British Airways flights from Louisville to London Heathrow Airport

Our best British Airways deals on Louisville to London Heathrow Airport flight tickets

British Airways

Aug 17

SDF8:06 pmLouisville Intl

11h 44m

1 stop

LHR12:50 pmLondon Heathrow

Aug 25

LHR3:00 pmLondon Heathrow

13h 55m

1 stop

SDF11:55 pmLouisville Intl

$743

British Airways

Sep 9

SDF5:56 pmLouisville Intl

10h 29m

1 stop

LHR9:25 amLondon Heathrow

Sep 22

LHR10:50 amLondon Heathrow

29h 37m

2 stops

SDF11:27 amLouisville Intl

$789

British Airways

Aug 23

SDF6:11 pmLouisville Intl

12h 04m

1 stop

LHR11:15 amLondon Heathrow

Sep 7

LHR9:15 amLondon Heathrow

13h 07m

1 stop

SDF5:22 pmLouisville Intl

$793

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

Quickest round-trip

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Mon 8/17

8:06 pm-12:50 pm

1 stop11h 44m

London Heathrow

Tue 8/25

3:00 pm-11:55 pm

1 stop13h 55m

$743

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Mon 8/17

4:00 pm-8:00 am

1 stop11h 00m

London Heathrow

Tue 8/25

6:15 am-10:47 pm

2 stops21h 32m

$744

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Mon 8/17

2:18 pm-9:00 am

1 stop13h 42m

London Heathrow

Tue 8/25

9:45 am-11:01 pm

1 stop18h 16m

$748

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 8/5

2:18 pm-9:00 am

1 stop13h 42m

London Heathrow

Fri 8/21

10:05 am-8:01 pm

1 stop14h 56m

$749

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 9/9

12:40 pm-12:50 pm

1 stop19h 10m

London Heathrow

Tue 9/22

11:00 am-7:39 pm

1 stop13h 39m

$750

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 5/6

11:16 am-10:30 am

1 stop18h 14m

London Heathrow

Wed 5/13

6:15 am-9:30 pm

2 stops20h 15m

$776

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 5/6

3:36 pm-8:30 am

1 stop11h 54m

London Heathrow

Wed 5/13

6:50 am-7:22 pm

2 stops17h 32m

$778

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 8/26

4:00 pm-9:35 am

1 stop12h 35m

London Heathrow

Wed 9/2

12:15 pm-11:01 pm

1 stop15h 46m

$779

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 5/6

2:00 pm-10:00 am

2 stops15h 00m

London Heathrow

Wed 5/13

10:50 am-10:30 pm

2 stops16h 40m

$782

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Mon 8/17

6:11 pm-12:15 pm

1 stop13h 04m

London Heathrow

Tue 8/25

6:15 am-11:01 pm

2 stops21h 46m

$788

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 $863 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 11% 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 41% of all bookings. The subsequent popular airlines are British Airways at 22%, Delta at 15%, and United Airlines at 11%.

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 8,292 reviews	Search Delta flights
British Airways	PriceFrom $589	Free Cancellation	Rating 6.7 7,786 reviews	Search British Airways flights
United Airlines	PriceFrom $678	Free Cancellation	Rating 7.4 9,424 reviews	Search United Airlines flights
American Airlines	PriceFrom $692	Free Cancellation	Rating 7.1 11,465 reviews	Search American Airlines flights

Gatwick

Hounslow

Milton Keynes

Luton

Dover

Slough

Crawley

Stratford-upon-Avon

Hayes

Wembley

Dartford

Croydon

Brentwood

Harrow

Watford

Guildford

Stansted

Cobham

Folkestone

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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Popular cities in the United Kingdom

Flights to London Gatwick Airportfrom $414

Flights to London City Airportfrom $590

Flights to London Stansted Airportfrom $348

Flights to London Luton Airportfrom $353

Flights to Glasgow Intl Airportfrom $494

Flights to Belfast Intl Airportfrom $621

Flights to London Southend Airportfrom $587

Flights to Belfast City Airportfrom $651

Cheap flights from Louisville to London from $277

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 9/7. 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

British Airways flights from Louisville to London Heathrow Airport

Our best British Airways 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

Louisville flight routes

According to popular flight searches on momondo this year

London Heathrow Airport flight routes

According to popular flight searches on momondo this year

Fly your favorite airline to London

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Cabin classes currently available on flights to London

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

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