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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 3/25. 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.
Lufthansa Logo
1:50 pm - 11:05 am
SDF
-
LHR
16h 15m1 stop
Lufthansa Logo
7:40 am - 7:43 pm
LHR
-
SDF
17h 03m2 stops
$598Lufthansa
Mon, Jan 26 - Mon, Feb 2
Lufthansa Logo
2:10 pm - 10:45 am
SDF
-
LHR
15h 35m2 stops
Lufthansa Logo
7:40 am - 7:43 pm
LHR
-
SDF
17h 03m2 stops
$617Lufthansa
Mon, Jan 26 - Mon, Feb 2
Lufthansa Logo
2:05 pm - 5:55 am
SDF
-
LHR
10h 50m1 stop
Lufthansa Logo
12:05 pm - 7:43 pm
LHR
-
SDF
12h 38m1 stop
$624Lufthansa
Mon, Jan 26 - Mon, Feb 2
Lufthansa Logo
5:45 pm - 12:50 pm
SDF
-
LHR
15h 05m2 stops
Lufthansa Logo
6:30 am - 7:31 pm
LHR
-
SDF
17h 01m2 stops
$627Lufthansa
Mon, Mar 9 - Wed, Mar 18
United Airlines Logo
5:35 am - 7:55 am
SDF
-
LHR
21h 20m1 stop
United Airlines Logo
6:50 am - 7:42 pm
LHR
-
SDF
17h 52m2 stops
$630United Airlines
Thu, Feb 12 - Thu, Feb 19
Multiple Airlines Logo
6:15 am - 7:10 am
SDF
-
LHR
19h 55m2 stops
Multiple Airlines Logo
7:40 am - 7:42 pm
LHR
-
SDF
17h 02m2 stops
$633Multiple Airlines
Thu, Feb 12 - Thu, Feb 19
United Airlines Logo
9:50 am - 5:55 am
SDF
-
LHR
15h 05m2 stops
United Airlines Logo
6:50 am - 7:42 pm
LHR
-
SDF
17h 52m2 stops
$634United Airlines
Thu, Feb 12 - Thu, Feb 19
United Airlines Logo
1:55 pm - 8:30 am
SDF
-
LHR
13h 35m1 stop
United Airlines Logo
7:25 am - 8:16 pm
LHR
-
SDF
17h 51m2 stops
$646United Airlines
Mon, Mar 30 - Wed, Apr 8
Lufthansa Logo
2:05 pm - 7:55 am
SDF
-
LHR
12h 50m1 stop
Lufthansa Logo
8:30 am - 10:09 pm
LHR
-
SDF
18h 39m2 stops
$653Lufthansa
Sat, Feb 28 - Wed, Sep 23
British Airways Logo
12:07 pm - 6:55 am
SDF
-
LHR
13h 48m1 stop
British Airways Logo
12:35 pm - 9:26 pm
LHR
-
SDF
13h 51m1 stop
$656British Airways
Thu, Feb 12 - Thu, Feb 19

Delta flights from Louisville to London Heathrow Airport

Our best Delta deals on Louisville to London Heathrow Airport flight tickets
Delta
Apr 7
SDF8:05 amLouisville Intl
17h 40m
1 stop
LHR6:45 amLondon Heathrow
Apr 28
LHR6:15 amLondon Heathrow
15h 27m
2 stops
SDF4:42 pmLouisville Intl
$653
Find similar
Delta
Apr 7
SDF10:50 amLouisville Intl
17h 00m
2 stops
LHR8:50 amLondon Heathrow
Apr 28
LHR6:15 amLondon Heathrow
15h 27m
2 stops
SDF4:42 pmLouisville Intl
$658
Find similar
Delta
Apr 3
SDF1:56 pmLouisville Intl
15h 44m
1 stop
LHR10:40 amLondon Heathrow
Apr 8
LHR6:30 amLondon Heathrow
19h 45m
2 stops
SDF9:15 pmLouisville Intl
$696
Find similar

Lufthansa flights from Louisville to London Heathrow Airport

Our best Lufthansa deals on Louisville to London Heathrow Airport flight tickets
Lufthansa
Jan 26
SDF1:50 pmLouisville Intl
16h 15m
1 stop
LHR11:05 amLondon Heathrow
Feb 2
LHR7:40 amLondon Heathrow
17h 03m
2 stops
SDF7:43 pmLouisville Intl
$598
Find similar
Lufthansa
Jan 26
SDF2:10 pmLouisville Intl
15h 35m
2 stops
LHR10:45 amLondon Heathrow
Feb 2
LHR7:40 amLondon Heathrow
17h 03m
2 stops
SDF7:43 pmLouisville Intl
$617
Find similar
Lufthansa
Jan 26
SDF2:05 pmLouisville Intl
10h 50m
1 stop
LHR5:55 amLondon Heathrow
Feb 2
LHR12:05 pmLondon Heathrow
12h 38m
1 stop
SDF7:43 pmLouisville Intl
$624
Find similar

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 December 31, 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

Mon 1/26

1:50 pm-11:05 am

1 stop16h 15m

London Heathrow

Mon 2/2

7:40 am-7:43 pm

2 stops17h 03m

$598

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Mon 1/26

2:10 pm-10:45 am

2 stops15h 35m

London Heathrow

Mon 2/2

7:40 am-7:43 pm

2 stops17h 03m

$617

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Mon 1/26

2:05 pm-5:55 am

1 stop10h 50m

London Heathrow

Mon 2/2

12:05 pm-7:43 pm

1 stop12h 38m

$624

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Mon 3/9

5:45 pm-12:50 pm

2 stops15h 05m

London Heathrow

Wed 3/18

6:30 am-7:31 pm

2 stops17h 01m

$627

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Thu 2/12

5:35 am-7:55 am

1 stop21h 20m

London Heathrow

Thu 2/19

6:50 am-7:42 pm

2 stops17h 52m

$630

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Thu 2/12

6:15 am-7:10 am

2 stops19h 55m

London Heathrow

Thu 2/19

7:40 am-7:42 pm

2 stops17h 02m

$633

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Thu 2/12

9:50 am-5:55 am

2 stops15h 05m

London Heathrow

Thu 2/19

6:50 am-7:42 pm

2 stops17h 52m

$634

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Mon 3/30

1:55 pm-8:30 am

1 stop13h 35m

London Heathrow

Wed 4/8

7:25 am-8:16 pm

2 stops17h 51m

$646

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Sat 2/28

2:05 pm-7:55 am

1 stop12h 50m

London Heathrow

Wed 9/23

8:30 am-10:09 pm

2 stops18h 39m

$653

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Thu 2/12

12:07 pm-6:55 am

1 stop13h 48m

London Heathrow

Thu 2/19

12:35 pm-9:26 pm

1 stop13h 51m

$656

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 15 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.

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 $940 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.

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

10h 11m

Direct flights

None
The fastest flight from Louisville to London Heathrow Airport takes 10h 11m
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 11m.

  • 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
1,435 reviews
Search KLM flights
British AirwaysPriceFrom $598Free CancellationRating
6.7
7,628 reviews
Search British Airways flights
Virgin AtlanticPriceFrom $598Free CancellationRating
7.5
677 reviews
Search Virgin Atlantic flights
DeltaPriceFrom $675Free CancellationRating
7.9
8,013 reviews
Search Delta flights
United AirlinesPriceFrom $678Free CancellationRating
7.4
9,124 reviews
Search United Airlines flights
American AirlinesPriceFrom $692Free CancellationRating
7.2
11,074 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
Salisbury
Watford
Wembley
Cobham
Folkestone
Romford
Richmond
Uxbridge

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.
Start using Trips
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