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Cheap flights from Louisville to London from $343

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 2/7. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Louisville to London

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
9:00 am - 7:10 amSDF-LHR
17h 10m2 stops
Multiple Airlines Logo
8:45 am - 10:29 pmLHR-SDF
18h 44m2 stops
$608Multiple Airlines
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Wed, Dec 3 - Wed, Dec 10
Lufthansa Logo
1:50 pm - 5:55 amSDF-LHR
11h 05m1 stop
Lufthansa Logo
6:30 am - 10:30 pmLHR-SDF
21h 00m2 stops
$614Lufthansa
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Fri, Dec 12 - Wed, Dec 24
United Airlines Logo
7:00 am - 7:10 amSDF-LHR
19h 10m2 stops
United Airlines Logo
11:10 am - 5:28 pmLHR-SDF
35h 18m2 stops
$616United Airlines
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Fri, Dec 12 - Wed, Dec 24
Virgin Atlantic Logo
3:37 pm - 9:00 amSDF-LHR
12h 23m1 stop
Virgin Atlantic Logo
1:00 pm - 9:15 pmLHR-SDF
13h 15m1 stop
$617Virgin Atlantic
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Wed, Jan 7 - Thu, Jan 22
United Airlines Logo
9:00 am - 7:10 amSDF-LHR
17h 10m2 stops
United Airlines Logo
6:50 am - 5:16 pmLHR-SDF
15h 26m2 stops
$618United Airlines
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Tue, Dec 2 - Tue, Dec 9
KLM Logo
3:37 pm - 9:00 amSDF-LHR
12h 23m1 stop
KLM Logo
11:45 am - 11:50 pmLHR-SDF
17h 05m2 stops
$619KLM
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Wed, Jan 7 - Thu, Jan 22
United Airlines Logo
6:12 pm - 7:55 amSDF-LHR
32h 43m1 stop
United Airlines Logo
6:50 am - 7:31 pmLHR-SDF
17h 41m2 stops
$625United Airlines
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Tue, Jan 6 - Sun, Jan 25
Delta Logo
3:00 pm - 7:50 amSDF-LHR
11h 50m1 stop
Delta Logo
11:45 am - 9:15 pmLHR-SDF
14h 30m2 stops
$627Delta
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Mon, Jan 5 - Sun, Jan 25
Lufthansa Logo
1:50 pm - 5:55 amSDF-LHR
11h 05m1 stop
Lufthansa Logo
1:35 pm - 10:30 pmLHR-SDF
13h 55m1 stop
$631Lufthansa
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Fri, Dec 12 - Wed, Dec 24
Air Canada Logo
1:45 pm - 8:35 pmSDF-LHR
49h 50m2 stops
Air Canada Logo
12:00 pm - 10:23 amLHR-SDF
27h 23m2 stops
$645Air Canada
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Tue, Jan 6 - Sun, Jan 25

Lufthansa flights from Louisville to London Heathrow Airport

Our best Lufthansa deals on Louisville to London Heathrow Airport flight tickets
Lufthansa
Feb 11
SDF2:05 pmLouisville Intl
16h 10m
1 stop
LHR11:15 amLondon Heathrow
Feb 18
LHR7:40 amLondon Heathrow
17h 02m
2 stops
SDF7:42 pmLouisville Intl
$612
Find similar
Lufthansa
Dec 12
SDF1:50 pmLouisville Intl
11h 05m
1 stop
LHR5:55 amLondon Heathrow
Dec 24
LHR6:30 amLondon Heathrow
21h 00m
2 stops
SDF10:30 pmLouisville Intl
$614
Find similar
Lufthansa
Feb 11
SDF2:10 pmLouisville Intl
15h 15m
2 stops
LHR10:25 amLondon Heathrow
Feb 18
LHR6:35 amLondon Heathrow
18h 07m
2 stops
SDF7:42 pmLouisville Intl
$620
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Iberia flights from Louisville to London Heathrow Airport

Our best Iberia deals on Louisville to London Heathrow Airport flight tickets
Iberia
Mar 1
SDF12:00 pmLouisville Intl
17h 25m
1 stop
LHR10:25 amLondon Heathrow
Mar 7
LHR7:40 pmLondon Heathrow
29h 19m
2 stops
SDF7:59 pmLouisville Intl
$687
Find similar
Iberia
Mar 1
SDF12:00 pmLouisville Intl
21h 55m
2 stops
LHR2:55 pmLondon Heathrow
Mar 7
LHR7:40 pmLondon Heathrow
29h 19m
2 stops
SDF7:59 pmLouisville Intl
$700
Find similar
Iberia
Nov 28
SDF12:43 pmLouisville Intl
14h 32m
1 stop
LHR8:15 amLondon Heathrow
Dec 5
LHR2:10 pmLondon Heathrow
13h 46m
1 stop
SDF10:56 pmLouisville Intl
$5,295
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momondo Fare Finder

 
Customize your flight search to find flights from Louisville to London Heathrow Airport that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated November 17, 2025.
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

Wed 12/3

9:00 am-7:10 am

2 stops17h 10m

London Heathrow

Wed 12/10

8:45 am-10:29 pm

2 stops18h 44m

$608

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Fri 12/12

1:50 pm-5:55 am

1 stop11h 05m

London Heathrow

Wed 12/24

6:30 am-10:30 pm

2 stops21h 00m

$614

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Fri 12/12

7:00 am-7:10 am

2 stops19h 10m

London Heathrow

Wed 12/24

11:10 am-5:28 pm

2 stops35h 18m

$616

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 1/7

3:37 pm-9:00 am

1 stop12h 23m

London Heathrow

Thu 1/22

1:00 pm-9:15 pm

1 stop13h 15m

$617

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Tue 12/2

9:00 am-7:10 am

2 stops17h 10m

London Heathrow

Tue 12/9

6:50 am-5:16 pm

2 stops15h 26m

$618

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 1/7

3:37 pm-9:00 am

1 stop12h 23m

London Heathrow

Thu 1/22

11:45 am-11:50 pm

2 stops17h 05m

$619

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Tue 1/6

6:12 pm-7:55 am

1 stop32h 43m

London Heathrow

Sun 1/25

6:50 am-7:31 pm

2 stops17h 41m

$625

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Mon 1/5

3:00 pm-7:50 am

1 stop11h 50m

London Heathrow

Sun 1/25

11:45 am-9:15 pm

2 stops14h 30m

$627

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Fri 12/12

1:50 pm-5:55 am

1 stop11h 05m

London Heathrow

Wed 12/24

1:35 pm-10:30 pm

1 stop13h 55m

$631

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Tue 1/6

1:45 pm-8:35 pm

2 stops49h 50m

London Heathrow

Sun 1/25

12:00 pm-10:23 am

2 stops27h 23m

$645

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to London from

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

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 $630. If you’re not able to fly to London Heathrow Airport in February, then October is your next best option. Flight prices from Louisville to London Heathrow Airport during October average around $694.

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

Our data shows that Wednesday is the least expensive day to fly to London Heathrow Airport. Tickets to fly out on this day can be as low as $803. The most expensive day to fly to London Heathrow Airport is Sunday, with ticket prices averaging around $1,071.

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

According to our data, the cheapest time of day to fly to London Heathrow Airport is in the evening. momondo users have found flights departing from Louisville to London Heathrow Airport in the evening for as low as $882. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights at noon are often more expensive with an average ticket price of $1,038.

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 $993 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 $749 on momondo.

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

Direct flights

None
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 50m.

  • 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?

  • 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?

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
KLMPriceFrom $574Free CancellationRating
7.7
1,411 reviews
Search KLM flights
Virgin AtlanticPriceFrom $580Free CancellationRating
7.5
673 reviews
Search Virgin Atlantic flights
British AirwaysPriceFrom $598Free CancellationRating
6.7
7,529 reviews
Search British Airways flights
United AirlinesPriceFrom $678Free CancellationRating
7.4
9,014 reviews
Search United Airlines flights
DeltaPriceFrom $690Free CancellationRating
7.9
8,007 reviews
Search Delta flights
American AirlinesPriceFrom $692Free CancellationRating
7.2
11,048 reviews
Search American Airlines flights

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Gatwick
Hounslow
Milton Keynes
Dover
Luton
Slough
Guildford
Hayes
Dartford
Stratford-upon-Avon
Crawley
Brentwood
Chelmsford
Salisbury
Wembley
Folkestone
Romford
Ilford
Cobham
Swindon

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

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.
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