£242 Cheap Flights from Louisville (SDF) to London (LHR)

View £242 flight on Mon, 3 Aug 2026Opens in a new window

Popular airlines from Louisville International Airport (SDF) to Heathrow Airport (LHR)

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Cheap Flights from Louisville (SDF) to London (LHR)

Prices were available within the past 7 days and start at £242 for one-way flights and £660 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

British Airways
Tue, 1 Sept - Tue, 15 Sept
SDF
Louisville
LHR
London
£660 Return, found 1 day ago
£660
Return
found 1 day ago
Select British Airways flight, departing Tue, 1 Sept from Louisville to London, returning Tue, 15 Sept, priced at £660 found 1 day ago
American Airlines
Tue, 1 Sept - Tue, 15 Sept
SDF
Louisville
LHR
London
£660 Return, found 1 day ago
£660
Return
found 1 day ago
Select American Airlines flight, departing Tue, 1 Sept from Louisville to London, returning Tue, 15 Sept, priced at £660 found 1 day ago
American Airlines
Tue, 1 Sept - Tue, 15 Sept
SDF
Louisville
LHR
London
£661 Return, found 1 day ago
£661
Return
found 1 day ago
Select American Airlines flight, departing Tue, 1 Sept from Louisville to London, returning Tue, 15 Sept, priced at £661 found 1 day ago
Finnair
Mon, 10 Aug - Tue, 18 Aug
SDF
Louisville
LHR
London
£681 Return, found 1 day ago
£681
Return
found 1 day ago
Select Finnair flight, departing Mon, 10 Aug from Louisville to London, returning Tue, 18 Aug, priced at £681 found 1 day ago
Iberia
Mon, 10 Aug - Tue, 18 Aug
SDF
Louisville
LHR
London
£681 Return, found 1 day ago
£681
Return
found 1 day ago
Select Iberia flight, departing Mon, 10 Aug from Louisville to London, returning Tue, 18 Aug, priced at £681 found 1 day ago
American Airlines
Tue, 1 Sept - Tue, 15 Sept
SDF
Louisville
LHR
London
£683 Return, found 1 day ago
£683
Return
found 1 day ago
Select American Airlines flight, departing Tue, 1 Sept from Louisville to London, returning Tue, 15 Sept, priced at £683 found 1 day ago
American Airlines
Tue, 1 Sept - Tue, 15 Sept
SDF
Louisville
LHR
London
£684 Return, found 1 day ago
£684
Return
found 1 day ago
Select American Airlines flight, departing Tue, 1 Sept from Louisville to London, returning Tue, 15 Sept, priced at £684 found 1 day ago
Finnair
Tue, 1 Sept - Tue, 15 Sept
SDF
Louisville
LHR
London
£685 Return, found 1 day ago
£685
Return
found 1 day ago
Select Finnair flight, departing Tue, 1 Sept from Louisville to London, returning Tue, 15 Sept, priced at £685 found 1 day ago
United
Tue, 1 Sept - Tue, 15 Sept
SDF
Louisville
LHR
London
£686 Return, found 1 day ago
£686
Return
found 1 day ago
Select United flight, departing Tue, 1 Sept from Louisville to London, returning Tue, 15 Sept, priced at £686 found 1 day ago
Air Canada
Tue, 1 Sept - Tue, 15 Sept
SDF
Louisville
LHR
London
£688 Return, found 1 day ago
£688
Return
found 1 day ago
Select Air Canada flight, departing Tue, 1 Sept from Louisville to London, returning Tue, 15 Sept, priced at £688 found 1 day ago

Alternative airports near London

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Heathrow LHR. Cheapest option available. Average driving time to city centre is 28 minutes. Flights from £996
LHR
Heathrow
Cheapest
Average driving time to city centre28 min
Flights from £996

Find the cheapest month to fly from Louisville (SDF) to London (LHR)

August is typically the cheapest month to fly

From £552 - £901 per traveller.

Frequently asked questions

How much is a flight from Louisville Muhammad Ali Intl. Airport to London Heathrow?
The lowest price advertised for a round-trip flight from Louisville Intl. Airport (SDF) to Heathrow Airport is £660. But you better act soon. This price is based on fares available within the last 7 days on Expedia for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from Louisville Intl. Airport (SDF) to Heathrow Airport?
Most flights can be cancelled online, but each airline has its own terms and conditions. If you do have to cancel your flight, visit our Customer Service Portal and follow the instructions.
How do I find cheap flights from Louisville Muhammad Ali Intl. Airport to Heathrow Airport (LHR) that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for SDF to Heathrow Airport flights, you'll see a "no change fees" filter for you to select.
How far is the flight from Louisville Intl. Airport (SDF) to Heathrow Airport?
Louisville to Hounslow is around 6,500 kilometres, so get ready to spend quite a while in the air. Don't forget to pack all the essentials, from your earplugs to your eye mask. Take a few snacks to munch on throughout your trip too.
Which airlines fly direct from SDF to Heathrow Airport (LHR)?
There are no direct flights, so you'll have to make at least one stop between Louisville Muhammad Ali Intl. Airport and LHR. Use the layover time to stretch your legs and take a break.
Are Louisville Muhammad Ali Intl. Airport to Heathrow Airport (LHR) flight tickets cheaper when they're purchased at the last minute?
Flight prices from SDF to Heathrow Airport are available up to 12 months before departure on Expedia. And although you may occasionally nab fantastic last-minute deals, it's never a sure thing. Also, booking your flights well in advance means you'll have more options — and you can avoid being wedged in the dreaded middle seat! We're constantly updating our fares to bring you the best bargains, so keep checking in for all the latest specials.

Frequently asked questions

How much does a flight from Louisville, KY (SDF-Louisville Intl.) to London (LHR-Heathrow) cost?
One-way flights typically cost between £248 and £1,210 and return flights often range between £767 and £2,872. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Anaa (AAA) to Toronto, ON (YYZ-Pearson Intl.) ticket fares go up or down.
What is the cheapest month to fly from Louisville, KY (SDF-Louisville Intl.) to London (LHR-Heathrow)?
February is typically the cheapest month to fly from Louisville, KY (SDF-Louisville Intl.) to London (LHR-Heathrow), with average return fares of approximately £493. This is about 24% lower than the average price throughout the year. February often sees lower prices because it falls after the busy holiday season, when travel demand tends to decrease. Other cheap months to fly from Louisville, KY (SDF-Louisville Intl.) to London (LHR-Heathrow) include January and August.
How do I find cheap flights from Louisville, KY (SDF-Louisville Intl.) to London (LHR-Heathrow)?
To find a cheap flight from Louisville, KY (SDF-Louisville Intl.) to London (LHR-Heathrow), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Louisville, KY (SDF-Louisville Intl.) to London (LHR-Heathrow)?
Based on booking data from the past year, the cheapest months to fly from Louisville, KY (SDF-Louisville Intl.) to London (LHR-Heathrow) are typically January and February, with average return flight prices around £493. However, the most popular months for this route are November and December, meaning you'll find plenty of flight options during those times. If you're looking for the best value, aiming for early in the year could save you money, though you might have fewer direct options compared to the busier holiday season.
How many flights per day from Louisville, KY (SDF-Louisville Intl.) to London (LHR-Heathrow)?
There are approximately 58 connecting flights per day from Louisville Intl. (SDF) to Heathrow (LHR). Some common connection points include O'Hare Intl. (ORD), Hartsfield-Jackson Atlanta Intl. (ATL), and Liberty Intl. (EWR).
What is the earliest flight from Louisville, KY (SDF-Louisville Intl.) to London (LHR-Heathrow)?
The earliest flight from Louisville, KY (SDF-Louisville Intl.) to London (LHR-Heathrow) typically departs at approximately 5:00 AM local time. This service is operated by American Airlines and is a seasonal offering, active only in March. An early departure like this can help you maximise your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Louisville, KY (SDF-Louisville Intl.) to London (LHR-Heathrow)?
You'll typically find the most flights from Louisville, KY (SDF-Louisville Intl.) to London (LHR-Heathrow) on a Thursday, with around 61 flights available. This gives you plenty of options for your travel plans. Major airlines on this route include American Airlines, Delta Air Lines, and United Airlines. Flight schedules are consistent throughout the week, with only slight variations.
What are the most popular departure times for flights from Louisville, KY (SDF-Louisville Intl.) to London (LHR-Heathrow)?
The most popular departure times for flights from Louisville, KY (SDF-Louisville Intl.) to London (LHR-Heathrow) are in the afternoon, from 12pm to 3pm. About 34% of passengers prefer this time. Many major carriers, including United Airlines, British Airways and American Airlines, offer flights during this window. This timing works well because it allows you to have a productive morning before heading to the airport, and you'll arrive in London with time to settle in.
How long does it take to fly from Louisville, KY (SDF-Louisville Intl.) to London (LHR-Heathrow)?
Flights from SDF to LHR with one stop typically take around 11 hours 20 minutes, covering approximately 4,036 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Louisville, KY (SDF-Louisville Intl.) to London (LHR-Heathrow)?
Select the "Business class" and "First class" filters when looking for SDF to LHR flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How do I earn miles on a Louisville, KY (SDF-Louisville Intl.) to London (LHR-Heathrow) flight with Expedia?
It's easy to earn miles on a Louisville, KY (SDF-Louisville Intl.) to London (LHR-Heathrow) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia. *Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for London from Louisville Intl. (SDF)?
From Louisville Intl. (SDF), you can fly into Heathrow (LHR), Gatwick (LGW) and London City (LCY) in London. Some flights may connect through major hubs like O'Hare Intl. (ORD), Hartsfield-Jackson Atlanta Intl. (ATL), Detroit Metropolitan Wayne County (DTW) before reaching London. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Louisville, KY (SDF-Louisville Intl.) to London (LHR-Heathrow) at the last minute?
Typically, booking a last minute flight from Louisville, KY (SDF-Louisville Intl.) to London (LHR-Heathrow) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Louisville, KY (SDF-Louisville Intl.) to London (LHR-Heathrow) flight and hotel package?
Securing a Louisville, KY (SDF-Louisville Intl.) to London (LHR-Heathrow) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Louisville, KY (SDF-Louisville Intl.) to London (LHR-Heathrow)?
If you booked your Louisville, KY (SDF-Louisville Intl.) to London (LHR-Heathrow) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Louisville Intl.
Destination airport
Heathrow
Airlines serving
Aer Lingus, Air Canada, Air France, American Airlines, British Airways, Delta, Finnair, Iberia, KLM, Lufthansa, United, Virgin Atlantic
Return price
£659
Distance
6457 km

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