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

British Airways 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 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 47% 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 February 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.

$220 Cheap Flights from Louisville to London Heathrow Airport in 2026

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One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

6:00 am - 9:00 pm

SDF

LHR

34h 00m

2 stops

10:50 am - 11:46 pm

LHR

SDF

17h 56m

2 stops

$640Multiple Airlines

Tue, Apr 7 - Tue, Apr 21

2:35 pm - 6:40 am

SDF

LHR

12h 05m

1 stop

1:25 pm - 4:46 pm

LHR

SDF

31h 21m

2 stops

$641United Airlines

Wed, Mar 18 - Wed, Mar 25

12:11 pm - 7:40 am

SDF

LHR

14h 29m

1 stop

6:15 am - 9:30 pm

LHR

SDF

20h 15m

2 stops

$644Iberia

Tue, Apr 7 - Tue, Apr 21

11:13 am - 10:30 am

SDF

LHR

18h 17m

1 stop

7:25 pm - 9:30 pm

LHR

SDF

31h 05m

2 stops

$647British Airways

Wed, Apr 8 - Mon, Apr 13

6:00 am - 9:35 pm

SDF

LHR

10h 35m

1 stop

7:25 am - 6:36 pm

LHR

SDF

16h 11m

2 stops

$649United Airlines

Mon, Apr 20 - Wed, May 20

1:55 pm - 10:00 am

SDF

LHR

15h 05m

2 stops

10:50 am - 10:30 pm

LHR

SDF

16h 40m

2 stops

$652United Airlines

Tue, Apr 7 - Tue, Apr 21

6:12 pm - 12:15 pm

SDF

LHR

13h 03m

1 stop

8:00 pm - 11:43 pm

LHR

SDF

32h 43m

2 stops

$655Iberia

Mon, Apr 6 - Mon, Apr 13

6:00 am - 8:35 pm

SDF

LHR

10h 35m

1 stop

3:10 pm - 11:59 pm

LHR

SDF

12h 49m

1 stop

$661United Airlines

Wed, Mar 18 - Wed, Mar 25

5:00 am - 6:30 am

SDF

LHR

20h 30m

2 stops

5:40 pm - 10:22 pm

LHR

SDF

33h 42m

2 stops

$662Air Canada

Mon, Apr 20 - Tue, May 19

7:20 pm - 6:30 am

SDF

LHR

54h 10m

2 stops

9:30 am - 7:42 pm

LHR

SDF

15h 12m

2 stops

$664Multiple Airlines

Fri, May 1 - Tue, May 19

Delta flights from Louisville to London Heathrow Airport

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

Delta

Mar 25

SDF8:05 amLouisville Intl

18h 20m

1 stop

LHR6:25 amLondon Heathrow

Apr 15

LHR9:55 amLondon Heathrow

16h 25m

2 stops

SDF9:20 pmLouisville Intl

$681

Delta

Apr 19

SDF11:12 amLouisville Intl

14h 13m

1 stop

LHR6:25 amLondon Heathrow

May 19

LHR11:20 amLondon Heathrow

14h 58m

2 stops

SDF9:18 pmLouisville Intl

$682

Delta

Apr 20

SDF3:16 pmLouisville Intl

14h 04m

2 stops

LHR10:20 amLondon Heathrow

Apr 30

LHR3:15 pmLondon Heathrow

24h 11m

1 stop

SDF10:26 amLouisville Intl

$687

Air Canada flights from Louisville to London Heathrow Airport

Our best Air Canada deals on Louisville to London Heathrow Airport flight tickets

Air Canada

Mar 18

SDF1:58 pmLouisville Intl

13h 12m

2 stops

LHR7:10 amLondon Heathrow

Mar 25

LHR1:25 pmLondon Heathrow

31h 21m

2 stops

SDF4:46 pmLouisville Intl

$668

Air Canada

Mar 19

SDF7:05 amLouisville Intl

19h 25m

2 stops

LHR6:30 amLondon Heathrow

Mar 26

LHR9:00 amLondon Heathrow

18h 59m

2 stops

SDF11:59 pmLouisville Intl

$670

Air Canada

Apr 19

SDF8:47 amLouisville Intl

16h 43m

2 stops

LHR6:30 amLondon Heathrow

May 20

LHR9:30 amLondon Heathrow

17h 52m

2 stops

SDF10:22 pmLouisville Intl

$684

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

Tue 4/7

6:00 am-9:00 pm

2 stops34h 00m

London Heathrow

Tue 4/21

10:50 am-11:46 pm

2 stops17h 56m

$640

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 3/18

2:35 pm-6:40 am

1 stop12h 05m

London Heathrow

Wed 3/25

1:25 pm-4:46 pm

2 stops31h 21m

$641

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Tue 4/7

12:11 pm-7:40 am

1 stop14h 29m

London Heathrow

Tue 4/21

6:15 am-9:30 pm

2 stops20h 15m

$644

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 4/8

11:13 am-10:30 am

1 stop18h 17m

London Heathrow

Mon 4/13

7:25 pm-9:30 pm

2 stops31h 05m

$647

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Mon 4/20

6:00 am-9:35 pm

1 stop10h 35m

London Heathrow

Wed 5/20

7:25 am-6:36 pm

2 stops16h 11m

$649

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Tue 4/7

1:55 pm-10:00 am

2 stops15h 05m

London Heathrow

Tue 4/21

10:50 am-10:30 pm

2 stops16h 40m

$652

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Mon 4/6

6:12 pm-12:15 pm

1 stop13h 03m

London Heathrow

Mon 4/13

8:00 pm-11:43 pm

2 stops32h 43m

$655

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 3/18

6:00 am-8:35 pm

1 stop10h 35m

London Heathrow

Wed 3/25

3:10 pm-11:59 pm

1 stop12h 49m

$661

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Mon 4/20

5:00 am-6:30 am

2 stops20h 30m

London Heathrow

Tue 5/19

5:40 pm-10:22 pm

2 stops33h 42m

$662

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Fri 5/1

7:20 pm-6:30 am

2 stops54h 10m

London Heathrow

Tue 5/19

9:30 am-7:42 pm

2 stops15h 12m

$664

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 $898 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 $687 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	9h 52m
Direct flights	None

The fastest flight from Louisville to London Heathrow Airport takes 9h 52m

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 9h 52m.
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 February 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 35% of all bookings. The subsequent popular airlines are Delta at 23%, Virgin Atlantic at 17%, and British Airways at 14%.

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
British Airways	PriceFrom $589	Free Cancellation	Rating 6.7 7,751 reviews	Search British Airways flights
Virgin Atlantic	PriceFrom $598	Free Cancellation	Rating 7.5 678 reviews	Search Virgin Atlantic flights
Delta	PriceFrom $617	Free Cancellation	Rating 7.9 8,207 reviews	Search Delta flights
United Airlines	PriceFrom $678	Free Cancellation	Rating 7.4 9,314 reviews	Search United Airlines flights
American Airlines	PriceFrom $692	Free Cancellation	Rating 7.2 11,304 reviews	Search American Airlines flights

Gatwick

Hounslow

Milton Keynes

Luton

Dover

Slough

Crawley

Hayes

Wembley

Dartford

Stratford-upon-Avon

Croydon

Brentwood

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 $363

Flights to London City Airportfrom $517

Flights to London Stansted Airportfrom $354

Flights to London Luton Airportfrom $348

Flights to Glasgow Intl Airportfrom $378

Flights to Belfast Intl Airportfrom $497

Flights to London Southend Airportfrom $484

Flights to Belfast City Airportfrom $561

Cheap flights from Louisville to London from $220

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 7/19. 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

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Our best Air Canada 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?

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

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

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

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

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

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London Heathrow Airport flight routes

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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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