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 57% 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 November 2026, there are 4 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.

$326 Cheap Flights from Louisville to London Heathrow Airport in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Louisville to London

Round-trip

One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

9:32 am - 10:15 amSDF Louisville Intl-LHR London Heathrow

20h 43m1 stop Houston George Bush Intcntl

9:00 am - 11:55 pmLHR London Heathrow-SDF Louisville Intl

18h 55m2 stops Zurich Chicago O'Hare Intl

$764United Airlines

Sun, Mar 21 - Tue, Mar 23

5:50 am - 7:10 amSDF Louisville Intl-LHR London Heathrow

21h 20m2 stops Washington, D.C. Dulles Intl Montreal Pierre Elliott Trudeau Intl

6:35 am - 8:14 pmLHR London Heathrow-SDF Louisville Intl

17h 39m2 stops Munich Franz Josef Strauss Chicago O'Hare Intl

$769United Airlines

Sun, Mar 21 - Tue, Mar 23

1:11 pm - 8:35 amSDF Louisville Intl-LHR London Heathrow

14h 24m1 stop Chicago O'Hare Intl

6:15 am - 9:35 pmLHR London Heathrow-SDF Louisville Intl

20h 20m2 stops Madrid Barajas Chicago O'Hare Intl

$877Iberia

Mon, Jan 18 - Fri, Jan 29

9:32 am - 7:40 amSDF Louisville Intl-LHR London Heathrow

18h 08m1 stop Houston George Bush Intcntl

7:40 am - 11:55 pmLHR London Heathrow-SDF Louisville Intl

20h 15m2 stops Munich Franz Josef Strauss Chicago O'Hare Intl

$882Lufthansa

Sun, Mar 21 - Tue, Mar 23

8:08 pm - 12:00 pmSDF Louisville Intl-LHR London Heathrow

11h 52m1 stop Charlotte Douglas

8:20 am - 9:32 pmLHR London Heathrow-SDF Louisville Intl

17h 12m1 stop Dallas/Fort Worth

$900British Airways

Sun, Mar 21 - Wed, Mar 24

8:08 pm - 12:00 pmSDF Louisville Intl-LHR London Heathrow

11h 52m1 stop Charlotte Douglas

8:20 am - 9:32 pmLHR London Heathrow-SDF Louisville Intl

17h 12m1 stop Dallas/Fort Worth

$900British Airways

Sun, Mar 21 - Thu, Mar 25

4:35 pm - 9:40 amSDF Louisville Intl-LHR London Heathrow

12h 05m1 stop Charlotte Douglas

12:15 pm - 9:57 pmLHR London Heathrow-SDF Louisville Intl

14h 42m1 stop Washington, D.C. Dulles Intl

$920American Airlines

Mon, Dec 7 - Wed, Dec 23

5:20 pm - 9:15 amSDF Louisville Intl-LHR London Heathrow

10h 55m1 stop Boston Logan Intl

9:55 am - 10:11 pmLHR London Heathrow-SDF Louisville Intl

17h 16m1 stop Charlotte Douglas

$979American Airlines

Tue, Dec 1 - Tue, Dec 8

3:24 pm - 10:30 amSDF Louisville Intl-LHR London Heathrow

15h 06m2 stops Atlanta Hartsfield-Jackson New York John F Kennedy Intl

1:25 pm - 8:51 pmLHR London Heathrow-SDF Louisville Intl

12h 26m1 stop Atlanta Hartsfield-Jackson

$1,012Delta

Wed, Mar 17 - Sun, Mar 28

3:24 pm - 10:30 amSDF Louisville Intl-LHR London Heathrow

15h 06m2 stops Atlanta Hartsfield-Jackson New York John F Kennedy Intl

1:25 pm - 8:51 pmLHR London Heathrow-SDF Louisville Intl

12h 26m1 stop Atlanta Hartsfield-Jackson

$1,013Delta

Wed, Mar 17 - Sun, Mar 28

Cheap last minute flights

Enter your travel dates to find the best prices.

1:14 pm - 8:35 amSDF Louisville Intl-LHR London Heathrow

14h 21m1 stop Chicago O'Hare Intl

7:30 am - 9:36 pmLHR London Heathrow-SDF Louisville Intl

19h 06m2 stops Madrid Barajas Chicago O'Hare Intl

$995Iberia

Fri, Nov 13 - Tue, Nov 17

10:13 am - 11:50 amSDF Louisville Intl-LHR London Heathrow

20h 37m2 stops Chicago O'Hare Intl Madrid Barajas

6:05 am - 9:36 pmLHR London Heathrow-SDF Louisville Intl

20h 31m2 stops Madrid Barajas Chicago O'Hare Intl

$1,004Iberia

Fri, Nov 13 - Tue, Nov 17

6:31 pm - 10:25 amSDF Louisville Intl-LHR London Heathrow

10h 54m1 stop Chicago O'Hare Intl

12:35 pm - 9:36 pmLHR London Heathrow-SDF Louisville Intl

14h 01m1 stop Chicago O'Hare Intl

$1,028American Airlines

Fri, Nov 13 - Tue, Nov 17

7:02 pm - 12:00 pmSDF Louisville Intl-LHR London Heathrow

11h 58m1 stop Charlotte Douglas

11:45 am - 11:25 pmLHR London Heathrow-SDF Louisville Intl

16h 40m1 stop Charlotte Douglas

$1,088British Airways

Sat, Nov 14 - Sat, Nov 21

9:17 am - 7:10 amSDF Louisville Intl-LHR London Heathrow

16h 53m3 stops Chicago O'Hare Intl Toronto Pearson Intl Montreal Pierre Elliott Trudeau Intl

1:00 pm - 10:30 pmLHR London Heathrow-SDF Louisville Intl

14h 30m2 stops Montreal Pierre Elliott Trudeau Intl Chicago O'Hare Intl

$1,092Multiple Airlines

Fri, Nov 13 - Tue, Nov 17

10:13 am - 8:05 amSDF Louisville Intl-LHR London Heathrow

16h 52m2 stops Chicago O'Hare Intl Dublin

7:50 am - 9:37 pmLHR London Heathrow-SDF Louisville Intl

18h 47m2 stops Dublin Chicago O'Hare Intl

$1,263Aer Lingus

Sat, Nov 14 - Sat, Nov 21

1:32 pm - 10:25 amSDF Louisville Intl-LHR London Heathrow

15h 53m1 stop Chicago O'Hare Intl

8:50 am - 9:37 pmLHR London Heathrow-SDF Louisville Intl

17h 47m2 stops Dublin Chicago O'Hare Intl

$1,265Multiple Airlines

Sat, Nov 14 - Sat, Nov 21

6:00 am - 9:00 pmSDF Louisville Intl-LHR London Heathrow

34h 00m3 stops Newark Toronto Pearson Intl Halifax Intl

9:00 am - 2:03 pmLHR London Heathrow-SDF Louisville Intl

34h 03m3 stops Zurich Toronto Pearson Intl New York LaGuardia

$1,554Multiple Airlines

Fri, Nov 13 - Tue, Nov 17

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United Airlines flights from Louisville to London Heathrow Airport

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

United Airlines

Mar 21

SDF9:32 amLouisville Intl

20h 43m

1 stop

LHR10:15 amLondon Heathrow

Mar 23

LHR9:00 amLondon Heathrow

18h 55m

2 stops

SDF11:55 pmLouisville Intl

$764

United Airlines

Mar 21

SDF5:50 amLouisville Intl

21h 20m

2 stops

LHR7:10 amLondon Heathrow

Mar 23

LHR6:35 amLondon Heathrow

17h 39m

2 stops

SDF8:14 pmLouisville Intl

$769

United Airlines

Feb 14

SDF1:10 pmLouisville Intl

37h 00m

2 stops

LHR7:10 amLondon Heathrow

Feb 17

LHR6:50 amLondon Heathrow

17h 43m

2 stops

SDF7:33 pmLouisville Intl

$772

Iberia flights from Louisville to London Heathrow Airport

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

Iberia

Jan 18

SDF1:11 pmLouisville Intl

14h 24m

1 stop

LHR8:35 amLondon Heathrow

Jan 29

LHR6:15 amLondon Heathrow

20h 20m

2 stops

SDF9:35 pmLouisville Intl

$877

Iberia

Jan 18

SDF1:11 pmLouisville Intl

17h 44m

2 stops

LHR11:55 amLondon Heathrow

Jan 29

LHR6:15 amLondon Heathrow

20h 20m

2 stops

SDF9:35 pmLouisville Intl

$885

Iberia

Mar 30

SDF1:19 pmLouisville Intl

13h 46m

1 stop

LHR8:05 amLondon Heathrow

Apr 13

LHR7:50 amLondon Heathrow

18h 40m

2 stops

SDF9:30 pmLouisville Intl

$891

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 Louisville Intl - LHR London Heathrow

SDFLHR

Louisville Intl

Sun 3/21

9:32 am-10:15 am

1 stop20h 43m

London Heathrow

Tue 3/23

9:00 am-11:55 pm

2 stops18h 55m

$764

LouisvilleLondon

SDF Louisville Intl - LHR London Heathrow

SDFLHR

Louisville Intl

Sun 3/21

5:50 am-7:10 am

2 stops21h 20m

London Heathrow

Tue 3/23

6:35 am-8:14 pm

2 stops17h 39m

$769

LouisvilleLondon

SDF Louisville Intl - LHR London Heathrow

SDFLHR

Louisville Intl

Mon 1/18

1:11 pm-8:35 am

1 stop14h 24m

London Heathrow

Fri 1/29

6:15 am-9:35 pm

2 stops20h 20m

$877

LouisvilleLondon

SDF Louisville Intl - LHR London Heathrow

SDFLHR

Louisville Intl

Sun 3/21

9:32 am-7:40 am

1 stop18h 08m

London Heathrow

Tue 3/23

7:40 am-11:55 pm

2 stops20h 15m

$882

LouisvilleLondon

SDF Louisville Intl - LHR London Heathrow

SDFLHR

Louisville Intl

Sun 3/21

8:08 pm-12:00 pm

1 stop11h 52m

London Heathrow

Wed 3/24

8:20 am-9:32 pm

1 stop17h 12m

$900

LouisvilleLondon

SDF Louisville Intl - LHR London Heathrow

SDFLHR

Louisville Intl

Sun 3/21

8:08 pm-12:00 pm

1 stop11h 52m

London Heathrow

Thu 3/25

8:20 am-9:32 pm

1 stop17h 12m

$900

Quickest round-trip

LouisvilleLondon

SDF Louisville Intl - LHR London Heathrow

SDFLHR

Louisville Intl

Mon 12/7

4:35 pm-9:40 am

1 stop12h 05m

London Heathrow

Wed 12/23

12:15 pm-9:57 pm

1 stop14h 42m

$920

LouisvilleLondon

SDF Louisville Intl - LHR London Heathrow

SDFLHR

Louisville Intl

Tue 12/1

5:20 pm-9:15 am

1 stop10h 55m

London Heathrow

Tue 12/8

9:55 am-10:11 pm

1 stop17h 16m

$979

LouisvilleLondon

SDF Louisville Intl - LHR London Heathrow

SDFLHR

Louisville Intl

Wed 3/17

3:24 pm-10:30 am

2 stops15h 06m

London Heathrow

Sun 3/28

1:25 pm-8:51 pm

1 stop12h 26m

$1,012

LouisvilleLondon

SDF Louisville Intl - LHR London Heathrow

SDFLHR

Louisville Intl

Wed 3/17

3:24 pm-10:30 am

2 stops15h 06m

London Heathrow

Sun 3/28

1:25 pm-8:51 pm

1 stop12h 26m

$1,013

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 $794. If you’re not able to fly to London Heathrow Airport in February, then March is your next best option. Flight prices from Louisville to London Heathrow Airport during March average around $865.

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

You could potentially save up to 18% 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

Best Price Found	$326
Fastest flight time	12h 45m
Direct flights	None

The best one-way flight to London Heathrow Airport from Louisville in the past 72 hours is $326. The best round-trip flight deal from Louisville to London Heathrow Airport found on momondo in the last 72 hours is $764.

The fastest flight from Louisville to London Heathrow Airport takes 12h 45m

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

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 12h 45m.
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 November 2026, there are 4 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 45% of all bookings. The subsequent popular airlines are American Airlines at 23%, United Airlines at 19%, and Delta at 13%.

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
Delta	PriceFrom $588	Free Cancellation	Rating 7.8 8,702 reviews	Search Delta flights
British Airways	PriceFrom $606	Free Cancellation	Rating 6.7 8,285 reviews	Search British Airways flights
American Airlines	PriceFrom $676	Free Cancellation	Rating 7.0 12,233 reviews	Search American Airlines flights
United Airlines	PriceFrom $743	Free Cancellation	Rating 7.3 10,474 reviews	Search United Airlines flights

Hounslow

Gatwick

Croydon

Hayes

Haverhill

Milton Keynes

Luton

Stansted

Kingston upon Thames

Dover

Watford

Richmond

Stratford-upon-Avon

Wembley

Crawley

Worthing

Brentford

Harrow

Canterbury

Hook

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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 $445

Flights to London Stansted Airportfrom $495

Flights to London City Airportfrom $719

Flights to London Luton Airportfrom $385

Flights to Glasgow Intl Airportfrom $497

Flights to Belfast City Airportfrom $799

Flights to Belfast Intl Airportfrom $757

Flights to London Southend Airportfrom $628

Cheap flights from Louisville to London from $326

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 5/3. 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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United Airlines flights from Louisville to London Heathrow Airport

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

Iberia flights from Louisville to London Heathrow Airport

Our best Iberia 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?

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

Best Price Found

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

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

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

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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