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Cheap flights from London Heathrow Airport to London from £127

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 24/9. 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
0 bags
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Find the cheapest flights from London Heathrow Airport to London

Cheap return flights

Multiple Airlines Logo
15:05 - 18:55LHR-SOU
3h 50m1 stop
Multiple Airlines Logo
08:05 - 14:15SOU-LHR
6h 10m1 stop
£176Multiple Airlines
Find Deal
Fri, 26 Sep - Mon, 29 Sep
Aer Lingus Logo
21:10 - 08:40LHR-SOU
11h 30m1 stop
Aer Lingus Logo
20:00 - 09:05SOU-LHR
13h 05m1 stop
£208Aer Lingus
Find Deal
Thu, 2 Oct - Wed, 8 Oct
Aer Lingus Logo
08:50 - 15:35LHR-SOU
6h 45m1 stop
Aer Lingus Logo
16:05 - 21:05SOU-LHR
5h 00m1 stop
£210Aer Lingus
Find Deal
Wed, 29 Oct - Wed, 5 Nov
Aer Lingus Logo
21:10 - 08:15LHR-SOU
11h 05m1 stop
Aer Lingus Logo
09:40 - 19:25SOU-LHR
9h 45m1 stop
£230Aer Lingus
Find Deal
Mon, 13 Oct - Mon, 20 Oct
Aer Lingus Logo
19:45 - 08:45LHR-SOU
13h 00m1 stop
Aer Lingus Logo
16:05 - 21:05SOU-LHR
5h 00m1 stop
£239Aer Lingus
Find Deal
Fri, 31 Oct - Fri, 7 Nov
Aer Lingus Logo
20:10 - 08:35LHR-SOU
12h 25m1 stop
Aer Lingus Logo
09:40 - 20:20SOU-LHR
10h 40m1 stop
£241Aer Lingus
Find Deal
Sat, 4 Oct - Sat, 11 Oct
Multiple Airlines Logo
15:05 - 07:35LHR-SOU
16h 30m1 stop
Multiple Airlines Logo
09:10 - 15:55SOU-LHR
6h 45m1 stop
£261Multiple Airlines
Find Deal
Sun, 28 Sep - Wed, 1 Oct
British Airways Logo
08:05 - 17:20LHR-SOU
9h 15m1 stop
British Airways Logo
12:15 - 20:55SOU-LHR
8h 40m1 stop
£303British Airways
Find Deal
Fri, 27 Feb - Sun, 22 Mar
British Airways Logo
07:45 - 12:40LHR-SOU
4h 55m1 stop
British Airways Logo
08:55 - 13:00SOU-LHR
4h 05m1 stop
£316British Airways
Find Deal
Mon, 20 Oct - Mon, 3 Nov
British Airways Logo
10:15 - 15:15LHR-SOU
5h 00m1 stop
British Airways Logo
08:55 - 12:35SOU-LHR
3h 40m1 stop
£325British Airways
Find Deal
Mon, 13 Oct - Thu, 6 Nov

British Airways flights from London Heathrow Airport to Southampton

Our best British Airways deals on London Heathrow Airport to Southampton flight tickets
British Airways
27 Feb
LHR08:05London Heathrow
9h 15m
1 stop
SOU17:20Southampton Eastleigh
22 Mar
SOU12:15Southampton Eastleigh
8h 40m
1 stop
LHR20:55London Heathrow
£303
Find similar
British Airways
20 Oct
LHR07:45London Heathrow
4h 55m
1 stop
SOU12:40Southampton Eastleigh
3 Nov
SOU08:55Southampton Eastleigh
4h 05m
1 stop
LHR13:00London Heathrow
£316
Find similar
British Airways
13 Oct
LHR10:15London Heathrow
5h 00m
1 stop
SOU15:15Southampton Eastleigh
6 Nov
SOU08:55Southampton Eastleigh
3h 40m
1 stop
LHR12:35London Heathrow
£325
Find similar

Aer Lingus flights from London Heathrow Airport to Southampton

Our best Aer Lingus deals on London Heathrow Airport to Southampton flight tickets
Aer Lingus
2 Oct
LHR21:10London Heathrow
11h 30m
1 stop
SOU08:40Southampton Eastleigh
8 Oct
SOU20:00Southampton Eastleigh
13h 05m
1 stop
LHR09:05London Heathrow
£208
Find similar
Aer Lingus
29 Oct
LHR08:50London Heathrow
6h 45m
1 stop
SOU15:35Southampton Eastleigh
5 Nov
SOU16:05Southampton Eastleigh
5h 00m
1 stop
LHR21:05London Heathrow
£210
Find similar
Aer Lingus
13 Oct
LHR21:10London Heathrow
11h 05m
1 stop
SOU08:15Southampton Eastleigh
20 Oct
SOU09:40Southampton Eastleigh
9h 45m
1 stop
LHR19:25London Heathrow
£230
Find similar

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 16 September 2025.
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

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Fri 26/9

15:05-18:55

1 stop3h 50m

Southampton Eastleigh

Mon 29/9

08:05-14:15

1 stop6h 10m

£176

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Thu 2/10

21:10-08:40

1 stop11h 30m

Southampton Eastleigh

Wed 8/10

20:00-09:05

1 stop13h 05m

£208

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Wed 29/10

08:50-15:35

1 stop6h 45m

Southampton Eastleigh

Wed 5/11

16:05-21:05

1 stop5h 00m

£210

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Mon 13/10

21:10-08:15

1 stop11h 05m

Southampton Eastleigh

Mon 20/10

09:40-19:25

1 stop9h 45m

£230

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Fri 31/10

19:45-08:45

1 stop13h 00m

Southampton Eastleigh

Fri 7/11

16:05-21:05

1 stop5h 00m

£239

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Sat 4/10

20:10-08:35

1 stop12h 25m

Southampton Eastleigh

Sat 11/10

09:40-20:20

1 stop10h 40m

£241

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Sun 28/9

15:05-07:35

1 stop16h 30m

Southampton Eastleigh

Wed 1/10

09:10-15:55

1 stop6h 45m

£261

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Fri 27/2

08:05-17:20

1 stop9h 15m

Southampton Eastleigh

Sun 22/3

12:15-20:55

1 stop8h 40m

£303

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Mon 20/10

07:45-12:40

1 stop4h 55m

Southampton Eastleigh

Mon 3/11

08:55-13:00

1 stop4h 05m

£316

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Mon 13/10

10:15-15:15

1 stop5h 00m

Southampton Eastleigh

Thu 6/11

08:55-12:35

1 stop3h 40m

£325

Flights are sorted by cheapest return 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 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 day to depart on your flight to Southampton?

Our data shows that Thursday is the least expensive day to fly to Southampton. Tickets to fly out on this day can be as low as £211. If your travel schedule is flexible, try to avoid departing on a Tuesday because tickets tend to average around £353. These prices are subject to change though, so be sure to set up a Price Alert for flights to Southampton.

What is the cheapest time of day to depart on your flight to Southampton?

According to our data, the cheapest time of day to fly to Southampton is at midday. momondo users have found flights departing from London Heathrow Airport to Southampton at midday for as low as £217. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are £288 on average. Flights to Southampton from London Heathrow Airport in the morning are generally more expensive because this time of day is more convenient for travellers’ schedules.

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

Direct flights

None
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

  • 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 50m, 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.

An easier way to manage your Southampton trip

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