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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.
British Airways Logo
10:31 am - 9:15 am
SDF
-
LHR
17h 44m
1 stop
British Airways Logo
3:00 pm - 10:43 pm
LHR
-
SDF
36h 43m
2 stops
$589British Airways
Wed, Feb 18 - Wed, Feb 25
British Airways Logo
12:15 pm - 11:15 am
SDF
-
LHR
18h 00m
1 stop
British Airways Logo
7:25 pm - 9:28 pm
LHR
-
SDF
31h 03m
2 stops
$592British Airways
Wed, Apr 8 - Mon, Apr 13
British Airways Logo
12:15 pm - 11:15 am
SDF
-
LHR
18h 00m
1 stop
British Airways Logo
7:25 pm - 6:32 pm
LHR
-
SDF
28h 07m
2 stops
$593British Airways
Wed, Apr 8 - Mon, Apr 13
Finnair Logo
2:11 pm - 10:00 am
SDF
-
LHR
14h 49m
1 stop
Finnair Logo
8:20 am - 8:14 pm
LHR
-
SDF
16h 54m
1 stop
$598Finnair
Tue, Feb 17 - Tue, Feb 24
Finnair Logo
2:01 pm - 10:00 am
SDF
-
LHR
14h 59m
1 stop
Finnair Logo
8:55 am - 8:14 pm
LHR
-
SDF
16h 19m
1 stop
$599Finnair
Wed, Feb 18 - Tue, Mar 31
British Airways Logo
7:05 pm - 10:30 am
SDF
-
LHR
10h 25m
1 stop
British Airways Logo
8:00 pm - 9:20 pm
LHR
-
SDF
30h 20m
2 stops
$601British Airways
Sun, Apr 19 - Mon, Apr 27
British Airways Logo
6:12 pm - 10:25 am
SDF
-
LHR
11h 13m
1 stop
British Airways Logo
3:45 pm - 11:16 pm
LHR
-
SDF
12h 31m
1 stop
$604British Airways
Wed, Feb 18 - Wed, Feb 25
British Airways Logo
4:33 pm - 8:00 am
SDF
-
LHR
10h 27m
1 stop
British Airways Logo
4:25 pm - 10:16 am
LHR
-
SDF
22h 51m
1 stop
$619British Airways
Mon, Apr 20 - Thu, Apr 30
British Airways Logo
9:43 am - 6:55 am
SDF
-
LHR
16h 12m
1 stop
British Airways Logo
4:25 pm - 10:16 am
LHR
-
SDF
22h 51m
1 stop
$620British Airways
Mon, Apr 20 - Thu, Apr 30
Multiple Airlines Logo
8:02 pm - 12:00 pm
SDF
-
LHR
10h 58m
1 stop
Multiple Airlines Logo
7:30 am - 9:26 pm
LHR
-
SDF
18h 56m
2 stops
$625Multiple Airlines
Thu, Feb 19 - Thu, Feb 26

British Airways flights from Louisville to London Heathrow Airport

Our best British Airways deals on Louisville to London Heathrow Airport flight tickets
British Airways
Apr 8
SDF12:15 pmLouisville Intl
18h 00m
1 stop
LHR11:15 amLondon Heathrow
Apr 13
LHR7:25 pmLondon Heathrow
31h 03m
2 stops
SDF9:28 pmLouisville Intl
$592
British Airways
Apr 8
SDF4:33 pmLouisville Intl
10h 27m
1 stop
LHR8:00 amLondon Heathrow
Apr 13
LHR7:25 pmLondon Heathrow
31h 03m
2 stops
SDF9:28 pmLouisville Intl
$593
British Airways
Feb 18
SDF6:12 pmLouisville Intl
12h 23m
1 stop
LHR11:35 amLondon Heathrow
Feb 25
LHR2:45 pmLondon Heathrow
14h 28m
1 stop
SDF12:13 amLouisville Intl
$604

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 3
SDF10:45 amLouisville Intl
15h 25m
2 stops
LHR7:10 amLondon Heathrow
Mar 12
LHR6:50 amLondon Heathrow
17h 24m
2 stops
SDF8:14 pmLouisville Intl
$633
United Airlines
Mar 6
SDF7:05 amLouisville Intl
23h 15m
2 stops
LHR11:20 amLondon Heathrow
Mar 13
LHR6:50 amLondon Heathrow
16h 41m
2 stops
SDF7:31 pmLouisville Intl
$637
United Airlines
Mar 6
SDF7:05 amLouisville Intl
23h 15m
2 stops
LHR11:20 amLondon Heathrow
Mar 13
LHR1:35 pmLondon Heathrow
12h 38m
1 stop
SDF10:13 pmLouisville Intl
$666

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 21, 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 2/18

10:31 am-9:15 am

1 stop17h 44m

London Heathrow

Wed 2/25

3:00 pm-10:43 pm

2 stops36h 43m

$589

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 4/8

12:15 pm-11:15 am

1 stop18h 00m

London Heathrow

Mon 4/13

7:25 pm-9:28 pm

2 stops31h 03m

$592

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 4/8

12:15 pm-11:15 am

1 stop18h 00m

London Heathrow

Mon 4/13

7:25 pm-6:32 pm

2 stops28h 07m

$593

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Tue 2/17

2:11 pm-10:00 am

1 stop14h 49m

London Heathrow

Tue 2/24

8:20 am-8:14 pm

1 stop16h 54m

$598

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 2/18

2:01 pm-10:00 am

1 stop14h 59m

London Heathrow

Tue 3/31

8:55 am-8:14 pm

1 stop16h 19m

$599

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Sun 4/19

7:05 pm-10:30 am

1 stop10h 25m

London Heathrow

Mon 4/27

8:00 pm-9:20 pm

2 stops30h 20m

$601

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Wed 2/18

6:12 pm-10:25 am

1 stop11h 13m

London Heathrow

Wed 2/25

3:45 pm-11:16 pm

1 stop12h 31m

$604

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Mon 4/20

4:33 pm-8:00 am

1 stop10h 27m

London Heathrow

Thu 4/30

4:25 pm-10:16 am

1 stop22h 51m

$619

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Mon 4/20

9:43 am-6:55 am

1 stop16h 12m

London Heathrow

Thu 4/30

4:25 pm-10:16 am

1 stop22h 51m

$620

LouisvilleLondon

SDF - LHR

SDFLHR

Louisville Intl

Thu 2/19

8:02 pm-12:00 pm

1 stop10h 58m

London Heathrow

Thu 2/26

7:30 am-9:26 pm

2 stops18h 56m

$625

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 $655.

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 $687 on momondo.

Can stopping save me money on Louisville to London Heathrow Airport flights?

You could potentially save up to 43% 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 27m

Direct flights

None
The fastest flight from Louisville to London Heathrow Airport takes 10h 27m
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 27m.

  • 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
7,689 reviews
Search British Airways flights
Virgin AtlanticPriceFrom $598Free CancellationRating
7.5
678 reviews
Search Virgin Atlantic flights
DeltaPriceFrom $617Free CancellationRating
7.9
8,088 reviews
Search Delta flights
United AirlinesPriceFrom $678Free CancellationRating
7.4
9,191 reviews
Search United Airlines flights
American AirlinesPriceFrom $688Free CancellationRating
7.2
11,174 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
Luton
Milton Keynes
Dover
Slough
Guildford
Wembley
Crawley
Dartford
Hayes
Stratford-upon-Avon
Brentwood
Watford
Cobham
Folkestone
Romford
Stansted
Harrow
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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