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Cheap flights from Louisville to London from $319

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.
British Airways Logo
5:38 pm - 12:10 pm
SDF
-
LHR
13h 32m1 stop
British Airways Logo
8:00 pm - 9:20 pm
LHR
-
SDF
30h 20m2 stops
$586British Airways
Wed, Apr 8 - Mon, Apr 13
British Airways Logo
7:14 pm - 12:00 pm
SDF
-
LHR
11h 46m1 stop
British Airways Logo
2:45 pm - 10:12 pm
LHR
-
SDF
12h 27m1 stop
$589British Airways
Wed, Feb 4 - Wed, Feb 11
British Airways Logo
11:14 am - 12:00 pm
SDF
-
LHR
19h 46m1 stop
British Airways Logo
6:45 pm - 7:07 pm
LHR
-
SDF
29h 22m2 stops
$595British Airways
Wed, Feb 4 - Wed, Feb 11
Lufthansa Logo
1:50 pm - 6:20 am
SDF
-
LHR
11h 30m1 stop
Lufthansa Logo
11:10 am - 10:30 pm
LHR
-
SDF
16h 20m2 stops
$596Lufthansa
Thu, Feb 5 - Mon, Feb 9
KLM Logo
3:37 pm - 9:00 am
SDF
-
LHR
12h 23m1 stop
KLM Logo
10:45 am - 7:39 pm
LHR
-
SDF
13h 54m1 stop
$599KLM
Sun, Jan 18 - Tue, Feb 3
British Airways Logo
8:30 am - 7:40 am
SDF
-
LHR
18h 10m1 stop
British Airways Logo
7:10 pm - 7:02 pm
LHR
-
SDF
28h 52m2 stops
$600British Airways
Mon, Apr 20 - Tue, Apr 28
Lufthansa Logo
1:50 pm - 6:20 am
SDF
-
LHR
11h 30m1 stop
Lufthansa Logo
7:40 am - 7:43 pm
LHR
-
SDF
17h 03m2 stops
$601Lufthansa
Fri, Feb 6 - Mon, Feb 9
Delta Logo
10:35 am - 6:25 am
SDF
-
LHR
14h 50m1 stop
Delta Logo
6:20 am - 6:13 pm
LHR
-
SDF
16h 53m2 stops
$602Delta
Sun, Jan 18 - Tue, Feb 3
British Airways Logo
10:49 am - 12:15 pm
SDF
-
LHR
21h 26m1 stop
British Airways Logo
7:30 am - 11:20 pm
LHR
-
SDF
19h 50m2 stops
$604British Airways
Sun, Mar 8 - Mon, Mar 16
British Airways Logo
7:20 pm - 12:00 pm
SDF
-
LHR
11h 40m1 stop
British Airways Logo
11:45 am - 10:12 pm
LHR
-
SDF
15h 27m1 stop
$606British Airways
Tue, Jan 20 - Wed, Jan 28

Delta flights from Louisville to London Heathrow Airport

Our best Delta deals on Louisville to London Heathrow Airport flight tickets
Delta
Jan 13
SDF10:35 amLouisville Intl
14h 50m
1 stop
LHR6:25 amLondon Heathrow
Jan 22
LHR6:20 amLondon Heathrow
16h 54m
2 stops
SDF6:14 pmLouisville Intl
$602
Find similar
Delta
Jan 18
SDF10:41 amLouisville Intl
15h 24m
2 stops
LHR7:05 amLondon Heathrow
Feb 3
LHR11:30 amLondon Heathrow
17h 20m
2 stops
SDF11:50 pmLouisville Intl
$607
Find similar
Delta
Jan 13
SDF3:37 pmLouisville Intl
12h 23m
1 stop
LHR9:00 amLondon Heathrow
Jan 21
LHR8:55 amLondon Heathrow
17h 10m
1 stop
SDF9:05 pmLouisville Intl
$609
Find similar

United Airlines flights from Louisville to London Heathrow Airport

Our best United Airlines deals on Louisville to London Heathrow Airport flight tickets
United Airlines
Feb 18
SDF1:50 pmLouisville Intl
11h 30m
1 stop
LHR6:20 amLondon Heathrow
Feb 22
LHR6:50 amLondon Heathrow
20h 23m
2 stops
SDF10:13 pmLouisville Intl
$630
Find similar
United Airlines
Feb 19
SDF2:35 pmLouisville Intl
15h 15m
1 stop
LHR10:50 amLondon Heathrow
Feb 23
LHR9:00 amLondon Heathrow
18h 13m
2 stops
SDF10:13 pmLouisville Intl
$631
Find similar
United Airlines
Feb 4
SDF9:50 amLouisville Intl
15h 30m
2 stops
LHR6:20 amLondon Heathrow
Feb 11
LHR6:50 amLondon Heathrow
15h 47m
2 stops
SDF5:37 pmLouisville Intl
$635
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 January 7, 2026.
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 4/8

5:38 pm-12:10 pm

1 stop13h 32m

London Heathrow

Mon 4/13

8:00 pm-9:20 pm

2 stops30h 20m

$586

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 2/4

7:14 pm-12:00 pm

1 stop11h 46m

London Heathrow

Wed 2/11

2:45 pm-10:12 pm

1 stop12h 27m

$589

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 2/4

11:14 am-12:00 pm

1 stop19h 46m

London Heathrow

Wed 2/11

6:45 pm-7:07 pm

2 stops29h 22m

$595

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Thu 2/5

1:50 pm-6:20 am

1 stop11h 30m

London Heathrow

Mon 2/9

11:10 am-10:30 pm

2 stops16h 20m

$596

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Sun 1/18

3:37 pm-9:00 am

1 stop12h 23m

London Heathrow

Tue 2/3

10:45 am-7:39 pm

1 stop13h 54m

$599

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Mon 4/20

8:30 am-7:40 am

1 stop18h 10m

London Heathrow

Tue 4/28

7:10 pm-7:02 pm

2 stops28h 52m

$600

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Fri 2/6

1:50 pm-6:20 am

1 stop11h 30m

London Heathrow

Mon 2/9

7:40 am-7:43 pm

2 stops17h 03m

$601

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Sun 1/18

10:35 am-6:25 am

1 stop14h 50m

London Heathrow

Tue 2/3

6:20 am-6:13 pm

2 stops16h 53m

$602

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Sun 3/8

10:49 am-12:15 pm

1 stop21h 26m

London Heathrow

Mon 3/16

7:30 am-11:20 pm

2 stops19h 50m

$604

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Tue 1/20

7:20 pm-12:00 pm

1 stop11h 40m

London Heathrow

Wed 1/28

11:45 am-10:12 pm

1 stop15h 27m

$606

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.

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 $915 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 $703 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 47m

Direct flights

None
The fastest flight from Louisville to London Heathrow Airport takes 10h 47m
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 47m.

  • 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
1,434 reviews
Search KLM flights
British AirwaysPriceFrom $598Free CancellationRating
6.7
7,655 reviews
Search British Airways flights
Virgin AtlanticPriceFrom $598Free CancellationRating
7.5
678 reviews
Search Virgin Atlantic flights
DeltaPriceFrom $675Free CancellationRating
7.9
8,021 reviews
Search Delta flights
United AirlinesPriceFrom $678Free CancellationRating
7.4
9,138 reviews
Search United Airlines flights
American AirlinesPriceFrom $692Free CancellationRating
7.2
11,090 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
Luton
Hounslow
Milton Keynes
Dover
Slough
Guildford
Hayes
Crawley
Dartford
Stratford-upon-Avon
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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