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

Lufthansa, United Airlines, and Air Canada are the most popular carriers operating from Louisville Intl to London

Which airlines fly to London?

British Airways, Virgin Atlantic and Iberia are the top three most popular airlines that fly to London from Louisville according to our data. British Airways is the first choice among our users, with 40% of people opting to fly with this airline when travelling to London. Keep in mind that there are 4 different airlines that fly to London 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?

Prices for flights from Louisville Intl Airport to London are updated daily.

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

There are 2 operators available for flights from Louisville Intl Airport to London as of November 2025.

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

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Louisville Intl Airport to London.

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

The travel and health documents you'll need for your trip to London 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. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

£303 Cheap Flights from Louisville to London in 2025/26

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Find the cheapest flights from Louisville to London

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One-way

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Cheap return flights

Enter your travel dates to find the best prices.

12:58 - 07:50SDF-LHR

13h 52m1 stop

06:20 - 18:45LHR-SDF

17h 25m2 stops

£450Delta

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Tue, 2 Dec - Tue, 9 Dec

15:18 - 07:50SDF-LHR

11h 32m1 stop

13:00 - 21:13LHR-SDF

13h 13m1 stop

£455KLM

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Tue, 2 Dec - Tue, 9 Dec

06:45 - 20:35SDF-LHR

32h 50m2 stops

17:50 - 22:29LHR-SDF

33h 39m2 stops

£470Multiple Airlines

Find Deal

Mon, 1 Dec - Mon, 15 Dec

13:50 - 05:55SDF-LHR

11h 05m1 stop

09:00 - 13:12LHR-SDF

33h 12m2 stops

£471United Airlines

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Thu, 4 Dec - Thu, 11 Dec

09:55 - 07:10SDF-LHR

16h 15m2 stops

09:00 - 11:32LHR-SDF

31h 32m2 stops

£472United Airlines

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Thu, 4 Dec - Thu, 11 Dec

12:57 - 06:25SDF-LHR

12h 28m1 stop

13:00 - 21:14LHR-SDF

13h 14m1 stop

£474Virgin Atlantic

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Tue, 18 Nov - Sun, 23 Nov

12:58 - 09:00SDF-LHR

15h 02m1 stop

08:55 - 18:52LHR-SDF

14h 57m1 stop

£474Virgin Atlantic

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Thu, 4 Dec - Thu, 11 Dec

16:26 - 10:00SDF-LHR

12h 34m1 stop

19:05 - 22:56LHR-SDF

32h 51m2 stops

£495British Airways

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Mon, 1 Dec - Mon, 15 Dec

14:05 - 12:55SDF-LCY

17h 50m2 stops

19:10 - 17:16LCY-SDF

27h 06m2 stops

£496Multiple Airlines

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Thu, 4 Dec - Thu, 11 Dec

19:13 - 12:00SDF-LHR

11h 47m1 stop

14:10 - 21:29LHR-SDF

12h 19m1 stop

£525British Airways

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Tue, 18 Nov - Sun, 23 Nov

Delta flights from Louisville to London

Our best Delta deals on Louisville to London flight tickets

Delta

9 Nov

SDF18:03Louisville Intl

9h 42m

1 stop

LHR08:45London Heathrow

25 Nov

LHR10:45London Heathrow

13h 27m

1 stop

SDF19:12Louisville Intl

£448

Find similar

Delta

2 Dec

SDF12:58Louisville Intl

13h 52m

1 stop

LHR07:50London Heathrow

9 Dec

LHR06:20London Heathrow

17h 25m

2 stops

SDF18:45Louisville Intl

£450

Find similar

Delta

9 Nov

SDF10:39Louisville Intl

16h 26m

2 stops

LHR08:05London Heathrow

25 Nov

LHR06:20London Heathrow

16h 03m

2 stops

SDF17:23Louisville Intl

£454

Find similar

KLM flights from Louisville to London

Our best KLM deals on Louisville to London flight tickets

KLM

9 Nov

SDF18:03Louisville Intl

9h 42m

1 stop

LHR08:45London Heathrow

25 Nov

LHR06:30London Heathrow

15h 46m

2 stops

SDF17:16Louisville Intl

£444

Find similar

KLM

2 Dec

SDF15:18Louisville Intl

11h 32m

1 stop

LHR07:50London Heathrow

9 Dec

LHR13:00London Heathrow

13h 13m

1 stop

SDF21:13Louisville Intl

£455

Find similar

KLM

4 Dec

SDF15:16Louisville Intl

12h 44m

1 stop

LHR09:00London Heathrow

11 Dec

LHR08:55London Heathrow

14h 57m

1 stop

SDF18:52Louisville Intl

£475

Find similar

Fly from

Fly to

Route

Depart

Return

Price

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Tue 2/12

12:58-07:50

1 stop13h 52m

London Heathrow

Tue 9/12

06:20-18:45

2 stops17h 25m

£450

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Tue 2/12

15:18-07:50

1 stop11h 32m

London Heathrow

Tue 9/12

13:00-21:13

1 stop13h 13m

£455

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Mon 1/12

06:45-20:35

2 stops32h 50m

London Heathrow

Mon 15/12

17:50-22:29

2 stops33h 39m

£470

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Thu 4/12

13:50-05:55

1 stop11h 05m

London Heathrow

Thu 11/12

09:00-13:12

2 stops33h 12m

£471

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Thu 4/12

09:55-07:10

2 stops16h 15m

London Heathrow

Thu 11/12

09:00-11:32

2 stops31h 32m

£472

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Tue 18/11

12:57-06:25

1 stop12h 28m

London Heathrow

Sun 23/11

13:00-21:14

1 stop13h 14m

£474

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Thu 4/12

12:58-09:00

1 stop15h 02m

London Heathrow

Thu 11/12

08:55-18:52

1 stop14h 57m

£474

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Mon 1/12

16:26-10:00

1 stop12h 34m

London Heathrow

Mon 15/12

19:05-22:56

2 stops32h 51m

£495

LouisvilleLondon

SDF - LCY

SDFLCY

Louisville Intl

Thu 4/12

14:05-12:55

2 stops17h 50m

London City

Thu 11/12

19:10-17:16

2 stops27h 06m

£496

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Tue 18/11

19:13-12:00

1 stop11h 47m

London Heathrow

Sun 23/11

14:10-21:29

1 stop12h 19m

£525

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Louisville to London

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?

The cheapest month to fly to London from Louisville is in August. Flight prices, which tend to average around £536, are often lower during this time because this is during the off-season. The month of September is another great option to travel to London, with average flight prices from Louisville averaging around £571.

What is the cheapest day to depart on your flight to London?

Our data shows that Tuesday is the least expensive day to fly to London. Tickets to fly out on this day can be as low as £522. When flying out on a Wednesday, the most expensive travel day of the week, you can expect to see flight prices from Louisville to London for around £854.

What is the cheapest time of day to depart on your flight to London?

The cheapest time of day to fly to London is at midday when flights can be purchased for as low as £570. Flights in the afternoon are often more expensive, with an average ticket price of £851.

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

You are more likely to see cheaper flights to London from Louisville when booking weeks ahead of your departure date. In general, you can expect to find flights to London for around £754 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from Louisville for as low as £638 on momondo.

When to book flights from Louisville to London

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

Estimated return price

Cheap Louisville to London (SDF to LON) flight deals and tips

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

Direct flights	None

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

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How far is Louisville Intl to London by plane?
There are 4042.6 mi between Louisville Intl and London. By plane, this route typically takes 9h 50m.
When did momondo last update prices for flights from Louisville Intl Airport to London?
Prices for flights from Louisville Intl Airport to London are updated daily.
How many operators does momondo search for flights from Louisville Intl Airport to London?
There are 2 operators available for flights from Louisville Intl Airport to London as of November 2025.
How old do you have to be to fly from Louisville Intl Airport to London?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Louisville Intl Airport to London.
What documentation or ID do you need to fly to London?
The travel and health documents you'll need for your trip to London 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. 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?
Based on momondo bookings for flights between Louisville and London, the leading airline is Virgin Atlantic, making up 100% of the total bookings.

Best airlines flying from Louisville to London

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

Airline	Rating	Free Cancellation	Price
Virgin Atlantic	PriceFrom £551	Free Cancellation	Rating 7.5 672 reviews		Search Virgin Atlantic flights
American Airlines	PriceFrom £569	Free Cancellation	Rating 7.2 11,040 reviews		Search American Airlines flights

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Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to London from Louisville.

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

momondo does allow users to show only those flights to London from Louisville which offer a flexible booking policy as well as other useful filters and features.

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

Once all potential Louisville to London flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Yes momondo offers price alerts on flights to London from Louisville. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.