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Cheap flights from Southampton to London from £138

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Southampton to London departing on 24/8. 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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Find the cheapest flights from Southampton to London

Cheap return flights

Logo
16:35 - 21:35SOU-LHR
5h 00m1 stop
Logo
15:05 - 18:55LHR-SOU
3h 50m1 stop
£195
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Wed, 1 Oct - Fri, 3 Oct
Logo
08:55 - 21:40SOU-LHR
12h 45m1 stop
Logo
19:20 - 08:25LHR-SOU
13h 05m1 stop
£268
Find Deal
Tue, 16 Sep - Tue, 23 Sep
Logo
08:55 - 20:20SOU-LHR
11h 25m1 stop
Logo
11:30 - 16:05LHR-SOU
4h 35m1 stop
£275
Find Deal
Sat, 27 Sep - Tue, 30 Sep
Logo
08:55 - 20:20SOU-LHR
11h 25m1 stop
Logo
07:45 - 12:40LHR-SOU
4h 55m1 stop
£277
Find Deal
Sat, 20 Sep - Mon, 22 Sep
KLM Logo
09:20 - 17:35SOU-LHR
8h 15m1 stop
KLM Logo
08:40 - 17:00LHR-SOU
8h 20m1 stop
£289KLM
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Fri, 12 Sep - Fri, 19 Sep
KLM Logo
09:20 - 17:35SOU-LHR
8h 15m1 stop
KLM Logo
08:40 - 17:00LHR-SOU
8h 20m1 stop
£295KLM
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Fri, 12 Sep - Fri, 19 Sep
Aer Lingus Logo
09:10 - 13:55SOU-LHR
4h 45m1 stop
Aer Lingus Logo
15:10 - 19:30LHR-SOU
4h 20m1 stop
£321Aer Lingus
Find Deal
Tue, 26 Aug - Tue, 2 Sep
British Airways Logo
08:55 - 20:20SOU-LHR
11h 25m1 stop
British Airways Logo
07:45 - 12:40LHR-SOU
4h 55m1 stop
£345British Airways
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Sat, 20 Sep - Mon, 22 Sep
Aer Lingus Logo
20:00 - 08:00SOU-LHR
12h 00m1 stop
Aer Lingus Logo
21:10 - 08:40LHR-SOU
11h 30m1 stop
£346Aer Lingus
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Thu, 14 Aug - Mon, 18 Aug
British Airways Logo
16:30 - 20:30SOU-LHR
4h 00m1 stop
British Airways Logo
11:30 - 16:05LHR-SOU
4h 35m1 stop
£404British Airways
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Tue, 16 Sep - Tue, 23 Sep

British Airways flights from Southampton to London Heathrow Airport

Our best British Airways deals on Southampton to London Heathrow Airport flight tickets
British Airways
20 Sept
SOU08:55Southampton Eastleigh
11h 25m
1 stop
LHR20:20London Heathrow
22 Sept
LHR07:45London Heathrow
4h 55m
1 stop
SOU12:40Southampton Eastleigh
£345
Find similar
British Airways
16 Sept
SOU16:30Southampton Eastleigh
4h 00m
1 stop
LHR20:30London Heathrow
23 Sept
LHR11:30London Heathrow
4h 35m
1 stop
SOU16:05Southampton Eastleigh
£404
Find similar
British Airways
15 Aug
SOU08:30Southampton Eastleigh
3h 50m
1 stop
LHR12:20London Heathrow
7 Sept
LHR08:50London Heathrow
3h 50m
1 stop
SOU12:40Southampton Eastleigh
£513
Find similar

KLM flights from Southampton to London Heathrow Airport

Our best KLM deals on Southampton to London Heathrow Airport flight tickets
KLM
12 Sept
SOU09:20Southampton Eastleigh
8h 15m
1 stop
LHR17:35London Heathrow
19 Sept
LHR08:40London Heathrow
8h 20m
1 stop
SOU17:00Southampton Eastleigh
£289
Find similar
KLM
12 Sept
SOU09:20Southampton Eastleigh
8h 15m
1 stop
LHR17:35London Heathrow
19 Sept
LHR08:40London Heathrow
8h 20m
1 stop
SOU17:00Southampton Eastleigh
£295
Find similar
KLM
26 Aug
SOU09:20Southampton Eastleigh
6h 55m
1 stop
LHR16:15London Heathrow
2 Sept
LHR20:55London Heathrow
11h 50m
1 stop
SOU08:45Southampton Eastleigh
£304
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from Southampton 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 279,928 searches. Data last updated 1 August 2025.
Use the filters below to find and compare flights from Southampton to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Wed 1/10

16:35-21:35

1 stop5h 00m

London Heathrow

Fri 3/10

15:05-18:55

1 stop3h 50m

£195

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Tue 16/9

08:55-21:40

1 stop12h 45m

London Heathrow

Tue 23/9

19:20-08:25

1 stop13h 05m

£268

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Sat 27/9

08:55-20:20

1 stop11h 25m

London Heathrow

Tue 30/9

11:30-16:05

1 stop4h 35m

£275

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Sat 20/9

08:55-20:20

1 stop11h 25m

London Heathrow

Mon 22/9

07:45-12:40

1 stop4h 55m

£277

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Fri 12/9

09:20-17:35

1 stop8h 15m

London Heathrow

Fri 19/9

08:40-17:00

1 stop8h 20m

£289

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Fri 12/9

09:20-17:35

1 stop8h 15m

London Heathrow

Fri 19/9

08:40-17:00

1 stop8h 20m

£295

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Tue 26/8

09:10-13:55

1 stop4h 45m

London Heathrow

Tue 2/9

15:10-19:30

1 stop4h 20m

£321

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Sat 20/9

08:55-20:20

1 stop11h 25m

London Heathrow

Mon 22/9

07:45-12:40

1 stop4h 55m

£345

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Thu 14/8

20:00-08:00

1 stop12h 00m

London Heathrow

Mon 18/8

21:10-08:40

1 stop11h 30m

£346

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Tue 16/9

16:30-20:30

1 stop4h 00m

London Heathrow

Tue 23/9

11:30-16:05

1 stop4h 35m

£404

Flights are sorted by cheapest return flights first.

Showing 1-10 of 15 resultsSorted by cheapest first
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See travel insights to London from

How to get the cheapest flight ticket from Southampton 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 day to depart on your flight to London Heathrow Airport?

On average, the least expensive day to fly to London Heathrow Airport from Southampton is on a Monday. momondo users have found tickets for Monday departures for as low as £825. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Saturday as prices are generally higher than usual. According to our data, the average ticket price to London Heathrow Airport on Saturday is £1,081.

What is the cheapest time of day to depart on your flight to London Heathrow Airport?

According to our data, the cheapest time of day to fly to London Heathrow Airport is at midday. momondo users have found flights departing from Southampton to London Heathrow Airport at midday for as low as £783. 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 £1,025 on average. Flights to London Heathrow Airport from Southampton in the morning are generally more expensive because this time of day is more convenient for travellers’ schedules.

What is the cheapest Southampton Eastleigh to London Heathrow flight route?

Fly from Southampton Eastleigh to London Heathrow for the best Southampton Eastleigh - London Heathrow flight prices

What cabin class options are available on Southampton Eastleigh to London Heathrow flights?

There are 2 cabin classes available to choose from on Southampton Eastleigh to London Heathrow flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

When to book flights from Southampton to London Heathrow Airport

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

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

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

Best price found

£138

Fastest flight time

3h 10m

Direct flights

None
The best one-way flight to London Heathrow Airport from Southampton in the past 72 hours is £138. The best return flight deal from Southampton to London Heathrow Airport found on momondo in the last 72 hours is £195.
The fastest flight from Southampton to London Heathrow Airport takes 3h 10m
There are no direct flights from Southampton to London Heathrow Airport. Popular non-direct route for this connection is Southampton Eastleigh Airport - London Heathrow Airport.
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  • How far is Southampton Eastleigh to London Heathrow by plane?

    The distance between Southampton Eastleigh and London Heathrow is about 56.4 mi. Flights usually cover this in 3h 10m, depending on flying conditions and air traffic around both airports.

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

    Prices for flights from Southampton Eastleigh Airport to London Heathrow Airport were last updated today.

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

  • What documentation or ID do you need to fly to London Heathrow Airport?

    The travel and health documents required for your trip to London Heathrow 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 London Heathrow Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from Southampton to London Heathrow Airport?

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Eastbourne
Milton Keynes
Luton
Slough
Northampton
Southend-on-Sea
Maidstone
Swindon
Canterbury
Gatwick
Stratford-upon-Avon
Ipswich
Ilford
Dartford
Guildford
Colchester
Worthing
Hounslow
Swanage
Salisbury

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Southampton to London. momondo saves you time and could save you money on your trip.

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

momondo does allow users to show only those flights to London from Southampton which offer a flexible booking policy as well as other useful filters and features.

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

momondo provides multiple filters to help you find the best flight to London from Southampton. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Yes momondo offers price alerts on flights to London from Southampton. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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