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Cheap flights from London Heathrow Airport to London from £99

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London Heathrow Airport to London departing on 15/9. 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
1 adult, Economy, 0 bags
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Find the cheapest flights from London Heathrow Airport to London

Cheap return flights

Enter your travel dates to find the best prices.
Aer Lingus Logo
15:10 - 19:30
LHR
-
SOU
4h 20m
1 stop
Aer Lingus Logo
09:20 - 16:00
SOU
-
LHR
6h 40m
1 stop
£242Aer Lingus
Sat, 29 Aug - Sat, 5 Sep
KLM Logo
20:55 - 08:45
LHR
-
SOU
11h 50m
1 stop
KLM Logo
17:20 - 20:55
SOU
-
LHR
3h 35m
1 stop
£245KLM
Fri, 18 Sep - Mon, 21 Sep
KLM Logo
20:55 - 08:45
LHR
-
SOU
11h 50m
1 stop
KLM Logo
17:20 - 20:55
SOU
-
LHR
3h 35m
1 stop
£246KLM
Fri, 18 Sep - Mon, 21 Sep
Multiple Airlines Logo
15:10 - 19:30
LHR
-
SOU
4h 20m
1 stop
Multiple Airlines Logo
14:15 - 20:05
SOU
-
LHR
5h 50m
1 stop
£250Multiple Airlines
Wed, 1 Jul - Tue, 7 Jul
Multiple Airlines Logo
15:10 - 19:30
LHR
-
SOU
4h 20m
1 stop
Multiple Airlines Logo
14:15 - 20:05
SOU
-
LHR
5h 50m
1 stop
£254Multiple Airlines
Wed, 1 Jul - Tue, 7 Jul
Multiple Airlines Logo
15:10 - 19:30
LHR
-
SOU
4h 20m
1 stop
Multiple Airlines Logo
14:15 - 20:05
SOU
-
LHR
5h 50m
1 stop
£255Multiple Airlines
Wed, 1 Jul - Tue, 7 Jul
Multiple Airlines Logo
15:10 - 19:30
LHR
-
SOU
4h 20m
1 stop
Multiple Airlines Logo
14:15 - 20:05
SOU
-
LHR
5h 50m
1 stop
£255Multiple Airlines
Wed, 1 Jul - Tue, 7 Jul
Multiple Airlines Logo
15:10 - 19:30
LHR
-
SOU
4h 20m
1 stop
Multiple Airlines Logo
14:15 - 20:05
SOU
-
LHR
5h 50m
1 stop
£256Multiple Airlines
Wed, 1 Jul - Tue, 7 Jul
Multiple Airlines Logo
15:10 - 19:30
LHR
-
SOU
4h 20m
1 stop
Multiple Airlines Logo
14:15 - 20:05
SOU
-
LHR
5h 50m
1 stop
£257Multiple Airlines
Tue, 28 Jul - Tue, 4 Aug
Multiple Airlines Logo
15:10 - 19:30
LHR
-
SOU
4h 20m
1 stop
Multiple Airlines Logo
14:15 - 20:05
SOU
-
LHR
5h 50m
1 stop
£259Multiple Airlines
Wed, 1 Jul - Tue, 7 Jul

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British Airways flights from London Heathrow Airport to Southampton

Our best British Airways deals on London Heathrow Airport to Southampton flight tickets
British Airways
11 Aug
LHR07:30London Heathrow
4h 35m
1 stop
SOU12:05Southampton Eastleigh
13 Aug
SOU06:45Southampton Eastleigh
5h 15m
1 stop
LHR12:00London Heathrow
£349
British Airways
1 Aug
LHR08:00London Heathrow
6h 30m
1 stop
SOU14:30Southampton Eastleigh
10 Aug
SOU12:20Southampton Eastleigh
5h 40m
1 stop
LHR18:00London Heathrow
£393
British Airways
12 Jul
LHR07:35London Heathrow
6h 30m
1 stop
SOU14:05Southampton Eastleigh
19 Jul
SOU14:45Southampton Eastleigh
6h 15m
1 stop
LHR21:00London Heathrow
£407

KLM flights from London Heathrow Airport to Southampton

Our best KLM deals on London Heathrow Airport to Southampton flight tickets
KLM
18 Sept
LHR20:55London Heathrow
11h 50m
1 stop
SOU08:45Southampton Eastleigh
21 Sept
SOU17:20Southampton Eastleigh
3h 35m
1 stop
LHR20:55London Heathrow
£246
KLM
13 Jul
LHR20:55London Heathrow
11h 50m
1 stop
SOU08:45Southampton Eastleigh
20 Jul
SOU18:05Southampton Eastleigh
13h 35m
1 stop
LHR07:40London Heathrow
£270
KLM
13 Jul
LHR20:55London Heathrow
11h 50m
1 stop
SOU08:45Southampton Eastleigh
20 Jul
SOU09:15Southampton Eastleigh
11h 40m
1 stop
LHR20:55London Heathrow
£300

momondo Fare Finder

 
Customise your flight search to find flights from London Heathrow Airport to Southampton 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 279,928 searches. Data last updated 18 June 2026.
Use the filters below to find and compare flights from London Heathrow Airport to Southampton that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Sat 29/8

15:10-19:30

1 stop4h 20m

Southampton Eastleigh

Sat 5/9

09:20-16:00

1 stop6h 40m

£242

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Fri 18/9

20:55-08:45

1 stop11h 50m

Southampton Eastleigh

Mon 21/9

17:20-20:55

1 stop3h 35m

£245

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Fri 18/9

20:55-08:45

1 stop11h 50m

Southampton Eastleigh

Mon 21/9

17:20-20:55

1 stop3h 35m

£246
Fastest return journey

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Wed 1/7

15:10-19:30

1 stop4h 20m

Southampton Eastleigh

Tue 7/7

14:15-20:05

1 stop5h 50m

£250

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Wed 1/7

15:10-19:30

1 stop4h 20m

Southampton Eastleigh

Tue 7/7

14:15-20:05

1 stop5h 50m

£254

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Wed 1/7

15:10-19:30

1 stop4h 20m

Southampton Eastleigh

Tue 7/7

14:15-20:05

1 stop5h 50m

£255

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Wed 1/7

15:10-19:30

1 stop4h 20m

Southampton Eastleigh

Tue 7/7

14:15-20:05

1 stop5h 50m

£255

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Wed 1/7

15:10-19:30

1 stop4h 20m

Southampton Eastleigh

Tue 7/7

14:15-20:05

1 stop5h 50m

£256

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Tue 28/7

15:10-19:30

1 stop4h 20m

Southampton Eastleigh

Tue 4/8

14:15-20:05

1 stop5h 50m

£257

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Wed 1/7

15:10-19:30

1 stop4h 20m

Southampton Eastleigh

Tue 7/7

14:15-20:05

1 stop5h 50m

£259

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to London from

How to get the cheapest flight ticket from London Heathrow Airport to Southampton

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 airline that flies from London Heathrow to Southampton Eastleigh?

Aer Lingus is the most popular carrier operating from London Heathrow to Southampton Eastleigh

When to book flights from London Heathrow Airport to Southampton

Are you open to changing your travel dates? Check out the ideal times to fly from London Heathrow Airport to Southampton according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap London Heathrow Airport to Southampton (LHR to SOU) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London Heathrow Airport to Southampton

Fastest flight time

3h 55m

Direct flights

None
The fastest flight from London Heathrow Airport to Southampton takes 3h 55m
There are no direct flights from London Heathrow Airport to Southampton. There are no popular flight routes from London Heathrow Airport to Southampton.
Search flight deals

Frequently asked questions about flying from London Heathrow Airport to Southampton

  • How far is London Heathrow to Southampton Eastleigh by plane?

    London Heathrow and Southampton Eastleigh are 56.4 mi apart from one another. Flights usually cover this in 3h 55m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from London Heathrow Airport to Southampton Eastleigh Airport?

    Prices for flights from London Heathrow Airport to Southampton Eastleigh Airport are refreshed on a daily basis.

  • How old do you have to be to fly from London Heathrow Airport to Southampton Eastleigh Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from London Heathrow Airport to Southampton Eastleigh Airport.

  • What documentation or ID do you need to fly to Southampton Eastleigh Airport?

    The travel and health documents required for your trip to Southampton Eastleigh Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Southampton Eastleigh Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Portsmouth

Why use momondo?

Why should I use momondo to find a flight deal from London to Southampton?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from London to Southampton . Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from London to Southampton with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Southampton from London with this policy.

How can momondo help me find flights from London to Southampton?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Southampton from London.

I’m not ready to book a flight from London to Southampton right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Southampton, momondo offers a useful price alert feature which will track prices for flights to Southampton from London and alert you when they change.

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