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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.
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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
2:35 pm - 12:50 pm
SDF
-
LHR
17h 15m
2 stops
Lufthansa Logo
8:30 am - 11:59 pm
LHR
-
SDF
20h 29m
2 stops
$629Lufthansa
Tue, Feb 24 - Tue, Mar 3
United Airlines Logo
2:05 pm - 5:55 am
SDF
-
LHR
10h 50m
1 stop
United Airlines Logo
6:50 am - 10:13 pm
LHR
-
SDF
20h 23m
2 stops
$630United Airlines
Tue, Feb 24 - Tue, Mar 3
Multiple Airlines Logo
8:47 am - 6:30 am
SDF
-
LHR
16h 43m
2 stops
Multiple Airlines Logo
10:50 am - 10:30 pm
LHR
-
SDF
16h 40m
2 stops
$644Multiple Airlines
Wed, Apr 1 - Wed, Apr 15
Delta Logo
1:56 pm - 6:45 am
SDF
-
LHR
11h 49m
1 stop
Delta Logo
6:30 am - 4:01 pm
LHR
-
SDF
14h 31m
2 stops
$646Delta
Wed, Apr 1 - Wed, Apr 15
British Airways Logo
4:27 pm - 12:50 pm
SDF
-
LHR
15h 23m
1 stop
British Airways Logo
7:25 pm - 9:28 pm
LHR
-
SDF
31h 03m
2 stops
$647British Airways
Wed, Apr 8 - Mon, Apr 13
Delta Logo
8:05 am - 6:45 am
SDF
-
LHR
17h 40m
1 stop
Delta Logo
6:30 am - 4:01 pm
LHR
-
SDF
14h 31m
2 stops
$649Delta
Wed, Apr 1 - Wed, Apr 15
Delta Logo
5:55 pm - 1:05 pm
SDF
-
LHR
14h 10m
2 stops
Delta Logo
6:30 am - 4:01 pm
LHR
-
SDF
14h 31m
2 stops
$653Delta
Wed, Apr 1 - Wed, Apr 15
Air Canada Logo
7:20 am - 8:35 am
SDF
-
LHR
20h 15m
2 stops
Air Canada Logo
12:40 pm - 7:59 pm
LHR
-
SDF
36h 19m
2 stops
$654Air Canada
Wed, Apr 1 - Thu, Apr 9
British Airways Logo
4:59 pm - 9:15 am
SDF
-
LHR
11h 16m
1 stop
British Airways Logo
2:45 pm - 12:13 am
LHR
-
SDF
14h 28m
1 stop
$656British Airways
Tue, Feb 24 - Tue, Mar 3
British Airways Logo
7:40 am - 7:55 am
SDF
-
LHR
19h 15m
1 stop
British Airways Logo
2:45 pm - 11:27 pm
LHR
-
SDF
13h 42m
1 stop
$672British Airways
Wed, Apr 1 - Wed, Apr 15

Lufthansa flights from Louisville to London Heathrow Airport

Our best Lufthansa deals on Louisville to London Heathrow Airport flight tickets
Lufthansa
Feb 24
SDF2:35 pmLouisville Intl
17h 15m
2 stops
LHR12:50 pmLondon Heathrow
Mar 3
LHR8:30 amLondon Heathrow
20h 29m
2 stops
SDF11:59 pmLouisville Intl
$629
Lufthansa
Feb 19
SDF1:50 pmLouisville Intl
15h 55m
2 stops
LHR10:45 amLondon Heathrow
Feb 26
LHR8:45 amLondon Heathrow
20h 14m
2 stops
SDF11:59 pmLouisville Intl
$723
Lufthansa
May 11
SDF7:20 pmLouisville Intl
18h 20m
2 stops
LHR6:40 pmLondon Heathrow
May 25
LHR7:10 pmLondon Heathrow
31h 59m
2 stops
SDF10:09 pmLouisville Intl
$786

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 24
SDF2:05 pmLouisville Intl
10h 50m
1 stop
LHR5:55 amLondon Heathrow
Mar 3
LHR6:50 amLondon Heathrow
20h 23m
2 stops
SDF10:13 pmLouisville Intl
$630
United Airlines
Feb 3
SDF2:05 pmLouisville Intl
16h 10m
1 stop
LHR11:15 amLondon Heathrow
Feb 10
LHR6:50 amLondon Heathrow
18h 38m
2 stops
SDF8:28 pmLouisville Intl
$697
United Airlines
Apr 9
SDF9:07 amLouisville Intl
18h 23m
1 stop
LHR8:30 amLondon Heathrow
Apr 14
LHR10:50 amLondon Heathrow
16h 40m
2 stops
SDF10:30 pmLouisville Intl
$699

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 29, 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

Tue 2/24

2:35 pm-12:50 pm

2 stops17h 15m

London Heathrow

Tue 3/3

8:30 am-11:59 pm

2 stops20h 29m

$629

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Tue 2/24

2:05 pm-5:55 am

1 stop10h 50m

London Heathrow

Tue 3/3

6:50 am-10:13 pm

2 stops20h 23m

$630

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 4/1

8:47 am-6:30 am

2 stops16h 43m

London Heathrow

Wed 4/15

10:50 am-10:30 pm

2 stops16h 40m

$644

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 4/1

1:56 pm-6:45 am

1 stop11h 49m

London Heathrow

Wed 4/15

6:30 am-4:01 pm

2 stops14h 31m

$646

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 4/8

4:27 pm-12:50 pm

1 stop15h 23m

London Heathrow

Mon 4/13

7:25 pm-9:28 pm

2 stops31h 03m

$647

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 4/1

8:05 am-6:45 am

1 stop17h 40m

London Heathrow

Wed 4/15

6:30 am-4:01 pm

2 stops14h 31m

$649

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 4/1

5:55 pm-1:05 pm

2 stops14h 10m

London Heathrow

Wed 4/15

6:30 am-4:01 pm

2 stops14h 31m

$653

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 4/1

7:20 am-8:35 am

2 stops20h 15m

London Heathrow

Thu 4/9

12:40 pm-7:59 pm

2 stops36h 19m

$654

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Tue 2/24

4:59 pm-9:15 am

1 stop11h 16m

London Heathrow

Tue 3/3

2:45 pm-12:13 am

1 stop14h 28m

$656

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 4/1

7:40 am-7:55 am

1 stop19h 15m

London Heathrow

Wed 4/15

2:45 pm-11:27 pm

1 stop13h 42m

$672

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 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 $897 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 $686 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
British AirwaysPriceFrom $589Free CancellationRating
6.7
7,705 reviews
Search British Airways flights
Virgin AtlanticPriceFrom $598Free CancellationRating
7.5
678 reviews
Search Virgin Atlantic flights
DeltaPriceFrom $617Free CancellationRating
7.9
8,127 reviews
Search Delta flights
United AirlinesPriceFrom $678Free CancellationRating
7.4
9,215 reviews
Search United Airlines flights
American AirlinesPriceFrom $688Free CancellationRating
7.2
11,206 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
Guildford
Crawley
Wembley
Dartford
Hayes
Stratford-upon-Avon
Brentwood
Harrow
Watford
Cobham
Folkestone
Romford
Stansted
Croydon

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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