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Cheap flights from Southampton to London from £124

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 30/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags
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Find the cheapest flights from Southampton to London

Cheap return flights

Enter your travel dates to find the best prices.
Aer Lingus Logo
09:20 - 17:20
SOU
-
LHR
8h 00m
1 stop
Aer Lingus Logo
14:20 - 19:30
LHR
-
SOU
5h 10m
1 stop
£244Aer Lingus
Wed, 22 Jul - Wed, 29 Jul
Aer Lingus Logo
20:00 - 09:05
SOU
-
LHR
13h 05m
1 stop
Aer Lingus Logo
20:10 - 08:35
LHR
-
SOU
12h 25m
1 stop
£250Aer Lingus
Sat, 15 Aug - Sat, 22 Aug
Aer Lingus Logo
20:00 - 17:20
SOU
-
LHR
21h 20m
1 stop
Aer Lingus Logo
14:20 - 19:30
LHR
-
SOU
5h 10m
1 stop
£260Aer Lingus
Tue, 21 Jul - Tue, 28 Jul
KLM Logo
18:05 - 07:40
SOU
-
LHR
13h 35m
1 stop
KLM Logo
20:55 - 08:45
LHR
-
SOU
11h 50m
1 stop
£263KLM
Mon, 20 Jul - Mon, 27 Jul
Aer Lingus Logo
20:00 - 09:05
SOU
-
LHR
13h 05m
1 stop
Aer Lingus Logo
14:20 - 19:30
LHR
-
SOU
5h 10m
1 stop
£264Aer Lingus
Tue, 21 Jul - Tue, 28 Jul
KLM Logo
18:05 - 07:40
SOU
-
LHR
13h 35m
1 stop
KLM Logo
20:55 - 08:45
LHR
-
SOU
11h 50m
1 stop
£274KLM
Mon, 20 Jul - Mon, 27 Jul
Aer Lingus Logo
09:20 - 17:20
SOU
-
LHR
8h 00m
1 stop
Aer Lingus Logo
21:10 - 08:35
LHR
-
SOU
11h 25m
1 stop
£277Aer Lingus
Sat, 15 Aug - Sat, 22 Aug
Aer Lingus Logo
09:20 - 13:55
SOU
-
LHR
4h 35m
1 stop
Aer Lingus Logo
21:10 - 08:40
LHR
-
SOU
11h 30m
1 stop
£281Aer Lingus
Mon, 10 Aug - Mon, 17 Aug
KLM Logo
18:05 - 07:40
SOU
-
LHR
13h 35m
1 stop
KLM Logo
20:55 - 08:45
LHR
-
SOU
11h 50m
1 stop
£284KLM
Tue, 21 Jul - Tue, 28 Jul
Aer Lingus Logo
20:00 - 08:05
SOU
-
LHR
12h 05m
1 stop
Aer Lingus Logo
15:10 - 19:30
LHR
-
SOU
4h 20m
1 stop
£286Aer Lingus
Thu, 23 Jul - Thu, 30 Jul

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Aer Lingus flights from Southampton to London Heathrow Airport

Our best Aer Lingus deals on Southampton to London Heathrow Airport flight tickets
Aer Lingus
22 Jul
SOU09:20Southampton Eastleigh
8h 00m
1 stop
LHR17:20London Heathrow
29 Jul
LHR14:20London Heathrow
5h 10m
1 stop
SOU19:30Southampton Eastleigh
£244
Aer Lingus
15 Aug
SOU20:00Southampton Eastleigh
13h 05m
1 stop
LHR09:05London Heathrow
22 Aug
LHR20:10London Heathrow
12h 25m
1 stop
SOU08:35Southampton Eastleigh
£250
Aer Lingus
21 Jul
SOU20:00Southampton Eastleigh
21h 20m
1 stop
LHR17:20London Heathrow
28 Jul
LHR14:20London Heathrow
5h 10m
1 stop
SOU19:30Southampton Eastleigh
£260

KLM flights from Southampton to London Heathrow Airport

Our best KLM deals on Southampton to London Heathrow Airport flight tickets
KLM
20 Jul
SOU18:05Southampton Eastleigh
13h 35m
1 stop
LHR07:40London Heathrow
27 Jul
LHR20:55London Heathrow
11h 50m
1 stop
SOU08:45Southampton Eastleigh
£263
KLM
20 Jul
SOU18:05Southampton Eastleigh
13h 35m
1 stop
LHR07:40London Heathrow
27 Jul
LHR20:55London Heathrow
11h 50m
1 stop
SOU08:45Southampton Eastleigh
£274
KLM
21 Jul
SOU18:05Southampton Eastleigh
13h 35m
1 stop
LHR07:40London Heathrow
28 Jul
LHR20:55London Heathrow
11h 50m
1 stop
SOU08:45Southampton Eastleigh
£284

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 26 June 2026.
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

Cheapest return flight
Fastest return journey

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Wed 22/7

09:20-17:20

1 stop8h 00m

London Heathrow

Wed 29/7

14:20-19:30

1 stop5h 10m

£244

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Sat 15/8

20:00-09:05

1 stop13h 05m

London Heathrow

Sat 22/8

20:10-08:35

1 stop12h 25m

£250

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Tue 21/7

20:00-17:20

1 stop21h 20m

London Heathrow

Tue 28/7

14:20-19:30

1 stop5h 10m

£260

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Mon 20/7

18:05-07:40

1 stop13h 35m

London Heathrow

Mon 27/7

20:55-08:45

1 stop11h 50m

£263

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Tue 21/7

20:00-09:05

1 stop13h 05m

London Heathrow

Tue 28/7

14:20-19:30

1 stop5h 10m

£264

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Mon 20/7

18:05-07:40

1 stop13h 35m

London Heathrow

Mon 27/7

20:55-08:45

1 stop11h 50m

£274

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Sat 15/8

09:20-17:20

1 stop8h 00m

London Heathrow

Sat 22/8

21:10-08:35

1 stop11h 25m

£277

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Mon 10/8

09:20-13:55

1 stop4h 35m

London Heathrow

Mon 17/8

21:10-08:40

1 stop11h 30m

£281

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Tue 21/7

18:05-07:40

1 stop13h 35m

London Heathrow

Tue 28/7

20:55-08:45

1 stop11h 50m

£284

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Thu 23/7

20:00-08:05

1 stop12h 05m

London Heathrow

Thu 30/7

15:10-19:30

1 stop4h 20m

£286

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 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 Wednesday. momondo users have found tickets for Wednesday departures for as low as £766. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Thursday as prices are generally higher than usual. According to our data, the average ticket price to London Heathrow Airport on Thursday is £1,130.

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 in the morning. momondo users have found flights departing from Southampton to London Heathrow Airport in the morning for as low as £795. 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 afternoon when prices are £1,010 on average. Flights to London Heathrow Airport from Southampton in the afternoon 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 to London Heathrow Airport flights?

There is only 1 cabin class available to choose from on Southampton to London Heathrow Airport 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

Fastest flight time

4h 10m

Direct flights

None
The fastest flight from Southampton to London Heathrow Airport takes 4h 10m
There are no direct flights from Southampton to London Heathrow Airport. There are no popular flight routes from Southampton to London Heathrow Airport.
Search flight deals

Frequently asked questions about flying from Southampton to London Heathrow Airport

  • 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 4h 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
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Wembley
Milton Keynes
Gatwick
Luton
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Slough
Southend-on-Sea
Maidstone
Northampton
Ipswich
Swindon
Ilford
Canterbury
Folkestone
Poole
Guildford
Hayes
Chichester
Bedford

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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