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Cheap flights from Louisville to London from $304

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.
United Airlines Logo
1:47 pm - 6:20 am
SDF
-
LHR
12h 33m
1 stop
United Airlines Logo
6:50 am - 8:14 pm
LHR
-
SDF
17h 24m
2 stops
$632United Airlines
Mon, Mar 9 - Mon, Mar 16
United Airlines Logo
1:58 pm - 7:10 am
SDF
-
LHR
13h 12m
2 stops
United Airlines Logo
6:50 am - 7:31 pm
LHR
-
SDF
16h 41m
2 stops
$635United Airlines
Wed, Mar 11 - Wed, Mar 18
United Airlines Logo
1:58 pm - 8:25 am
SDF
-
LHR
14h 27m
2 stops
United Airlines Logo
6:50 am - 8:14 pm
LHR
-
SDF
17h 24m
2 stops
$636United Airlines
Mon, Mar 9 - Mon, Mar 16
United Airlines Logo
6:00 am - 8:35 pm
SDF
-
LHR
10h 35m
1 stop
United Airlines Logo
10:30 am - 2:47 pm
LHR
-
SDF
32h 17m
2 stops
$644United Airlines
Wed, Mar 18 - Mon, Mar 23
British Airways Logo
11:13 am - 10:30 am
SDF
-
LHR
18h 17m
1 stop
British Airways Logo
7:25 pm - 9:30 pm
LHR
-
SDF
31h 05m
2 stops
$646British Airways
Wed, Apr 8 - Mon, Apr 13
Delta Logo
6:00 am - 6:45 am
SDF
-
LHR
19h 45m
1 stop
Delta Logo
8:40 am - 11:09 pm
LHR
-
SDF
19h 29m
2 stops
$648Delta
Wed, Apr 1 - Tue, Apr 7
KLM Logo
3:05 pm - 7:50 am
SDF
-
LHR
12h 45m
1 stop
KLM Logo
8:55 am - 6:52 pm
LHR
-
SDF
13h 57m
1 stop
$652KLM
Mon, Mar 9 - Mon, Mar 16
Delta Logo
8:05 am - 5:20 am
SDF
-
LHR
16h 15m
2 stops
Delta Logo
8:40 am - 11:09 pm
LHR
-
SDF
19h 29m
2 stops
$653Delta
Wed, Apr 1 - Tue, Apr 7
British Airways Logo
1:30 pm - 7:00 am
SDF
-
LHR
13h 30m
1 stop
British Airways Logo
8:20 am - 7:42 pm
LHR
-
SDF
15h 22m
1 stop
$658British Airways
Wed, Mar 11 - Wed, Mar 18
United Airlines Logo
6:00 am - 8:35 pm
SDF
-
LHR
10h 35m
1 stop
United Airlines Logo
1:35 pm - 10:13 pm
LHR
-
SDF
12h 38m
1 stop
$661United Airlines
Thu, Mar 12 - Tue, Mar 24

United Airlines flights from Louisville to London Heathrow Airport

Our best United Airlines deals on Louisville to London Heathrow Airport flight tickets
United Airlines
Mar 9
SDF1:47 pmLouisville Intl
12h 33m
1 stop
LHR6:20 amLondon Heathrow
Mar 16
LHR6:50 amLondon Heathrow
17h 24m
2 stops
SDF8:14 pmLouisville Intl
$632
United Airlines
Mar 11
SDF1:58 pmLouisville Intl
13h 12m
2 stops
LHR7:10 amLondon Heathrow
Mar 18
LHR6:50 amLondon Heathrow
16h 41m
2 stops
SDF7:31 pmLouisville Intl
$635
United Airlines
Mar 9
SDF1:58 pmLouisville Intl
14h 27m
2 stops
LHR8:25 amLondon Heathrow
Mar 16
LHR6:50 amLondon Heathrow
17h 24m
2 stops
SDF8:14 pmLouisville Intl
$636

Air Canada flights from Louisville to London Heathrow Airport

Our best Air Canada deals on Louisville to London Heathrow Airport flight tickets
Air Canada
Mar 25
SDF9:55 amLouisville Intl
17h 15m
2 stops
LHR7:10 amLondon Heathrow
Apr 8
LHR9:30 amLondon Heathrow
18h 00m
2 stops
SDF10:30 pmLouisville Intl
$716
Air Canada
Mar 18
SDF6:00 amLouisville Intl
34h 35m
2 stops
LHR8:35 pmLondon Heathrow
Mar 22
LHR1:25 pmLondon Heathrow
34h 17m
2 stops
SDF7:42 pmLouisville Intl
$723
Air Canada
Apr 2
SDF8:47 amLouisville Intl
40h 43m
2 stops
LHR6:30 amLondon Heathrow
Apr 13
LHR12:40 pmLondon Heathrow
39h 32m
2 stops
SDF11:12 pmLouisville Intl
$757

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 February 12, 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

Mon 3/9

1:47 pm-6:20 am

1 stop12h 33m

London Heathrow

Mon 3/16

6:50 am-8:14 pm

2 stops17h 24m

$632

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 3/11

1:58 pm-7:10 am

2 stops13h 12m

London Heathrow

Wed 3/18

6:50 am-7:31 pm

2 stops16h 41m

$635

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Mon 3/9

1:58 pm-8:25 am

2 stops14h 27m

London Heathrow

Mon 3/16

6:50 am-8:14 pm

2 stops17h 24m

$636

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 3/18

6:00 am-8:35 pm

1 stop10h 35m

London Heathrow

Mon 3/23

10:30 am-2:47 pm

2 stops32h 17m

$644

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 4/8

11:13 am-10:30 am

1 stop18h 17m

London Heathrow

Mon 4/13

7:25 pm-9:30 pm

2 stops31h 05m

$646

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 4/1

6:00 am-6:45 am

1 stop19h 45m

London Heathrow

Tue 4/7

8:40 am-11:09 pm

2 stops19h 29m

$648

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Mon 3/9

3:05 pm-7:50 am

1 stop12h 45m

London Heathrow

Mon 3/16

8:55 am-6:52 pm

1 stop13h 57m

$652

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 4/1

8:05 am-5:20 am

2 stops16h 15m

London Heathrow

Tue 4/7

8:40 am-11:09 pm

2 stops19h 29m

$653

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 3/11

1:30 pm-7:00 am

1 stop13h 30m

London Heathrow

Wed 3/18

8:20 am-7:42 pm

1 stop15h 22m

$658

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Thu 3/12

6:00 am-8:35 pm

1 stop10h 35m

London Heathrow

Tue 3/24

1:35 pm-10:13 pm

1 stop12h 38m

$661

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 $619. If you’re not able to fly to London Heathrow Airport in February, then January is your next best option. Flight prices from Louisville to London Heathrow Airport during January average around $645.

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 $898 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 $687 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

9h 52m

Direct flights

None
The fastest flight from Louisville to London Heathrow Airport takes 9h 52m
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 9h 52m.

  • 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
British AirwaysPriceFrom $589Free CancellationRating
6.7
7,731 reviews
Search British Airways flights
Virgin AtlanticPriceFrom $598Free CancellationRating
7.5
678 reviews
Search Virgin Atlantic flights
DeltaPriceFrom $617Free CancellationRating
7.9
8,181 reviews
Search Delta flights
United AirlinesPriceFrom $678Free CancellationRating
7.4
9,281 reviews
Search United Airlines flights
American AirlinesPriceFrom $692Free CancellationRating
7.2
11,271 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
Luton
Dover
Slough
Crawley
Hayes
Wembley
Dartford
Stratford-upon-Avon
Croydon
Brentwood
Guildford
Harrow
Watford
Cobham
Folkestone
Romford
Stansted

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

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