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Cheap flights from Southampton to London from £143

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 5/9. 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

Find the cheapest flights from Southampton to London

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
19:25 - 14:15SOU  Southampton Eastleigh-LHR London Heathrow
18h 50m1 stop Paris Orly
Multiple Airlines Logo
15:00 - 18:55LHR  London Heathrow-SOU Southampton Eastleigh
3h 55m1 stop Paris Orly
£227Multiple Airlines
Sat, 5 Sep - Sat, 12 Sep
Aer Lingus Logo
08:55 - 17:20SOU  Southampton Eastleigh-LHR London Heathrow
8h 25m1 stop Dublin
Aer Lingus Logo
07:40 - 16:50LHR  London Heathrow-SOU Southampton Eastleigh
9h 10m1 stop Dublin
£233Aer Lingus
Wed, 16 Sep - Wed, 23 Sep
Aer Lingus Logo
17:20 - 08:05SOU  Southampton Eastleigh-LHR London Heathrow
14h 45m1 stop Dublin
Aer Lingus Logo
15:10 - 19:30LHR  London Heathrow-SOU Southampton Eastleigh
4h 20m1 stop Dublin
£234Aer Lingus
Thu, 10 Sep - Wed, 16 Sep
Aer Lingus Logo
08:55 - 17:20SOU  Southampton Eastleigh-LHR London Heathrow
8h 25m1 stop Dublin
Aer Lingus Logo
07:40 - 16:50LHR  London Heathrow-SOU Southampton Eastleigh
9h 10m1 stop Dublin
£240Aer Lingus
Wed, 16 Sep - Wed, 23 Sep
KLM Logo
17:20 - 20:55SOU  Southampton Eastleigh-LHR London Heathrow
3h 35m1 stop Amsterdam Schiphol
KLM Logo
20:55 - 08:35LHR  London Heathrow-SOU Southampton Eastleigh
11h 40m1 stop Amsterdam Schiphol
£247KLM
Wed, 16 Sep - Wed, 23 Sep
KLM Logo
17:20 - 20:55SOU  Southampton Eastleigh-LHR London Heathrow
3h 35m1 stop Amsterdam Schiphol
KLM Logo
19:15 - 08:35LHR  London Heathrow-SOU Southampton Eastleigh
13h 20m1 stop Amsterdam Schiphol
£259KLM
Thu, 10 Sep - Wed, 16 Sep
Aer Lingus Logo
09:20 - 13:55SOU  Southampton Eastleigh-LHR London Heathrow
4h 35m1 stop Dublin
Aer Lingus Logo
15:10 - 19:30LHR  London Heathrow-SOU Southampton Eastleigh
4h 20m1 stop Dublin
£259Aer Lingus
Thu, 3 Sep - Thu, 10 Sep
Aer Lingus Logo
09:20 - 13:55SOU  Southampton Eastleigh-LHR London Heathrow
4h 35m1 stop Dublin
Aer Lingus Logo
15:10 - 19:30LHR  London Heathrow-SOU Southampton Eastleigh
4h 20m1 stop Dublin
£261Aer Lingus
Thu, 3 Sep - Thu, 10 Sep
Aer Lingus Logo
09:20 - 20:20SOU  Southampton Eastleigh-LHR London Heathrow
11h 00m1 stop Dublin
Aer Lingus Logo
08:50 - 19:30LHR  London Heathrow-SOU Southampton Eastleigh
10h 40m1 stop Dublin
£264Aer Lingus
Sat, 5 Sep - Sat, 12 Sep
Aer Lingus Logo
09:20 - 13:55SOU  Southampton Eastleigh-LHR London Heathrow
4h 35m1 stop Dublin
Aer Lingus Logo
22:00 - 08:40LHR  London Heathrow-SOU Southampton Eastleigh
10h 40m1 stop Dublin
£265Aer Lingus
Sun, 6 Sep - Sun, 13 Sep

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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
16 Sept
SOU08:55Southampton Eastleigh
8h 25m
1 stop
LHR17:20London Heathrow
23 Sept
LHR07:40London Heathrow
9h 10m
1 stop
SOU16:50Southampton Eastleigh
£233
Aer Lingus
10 Sept
SOU17:20Southampton Eastleigh
14h 45m
1 stop
LHR08:05London Heathrow
16 Sept
LHR15:10London Heathrow
4h 20m
1 stop
SOU19:30Southampton Eastleigh
£234
Aer Lingus
16 Sept
SOU08:55Southampton Eastleigh
8h 25m
1 stop
LHR17:20London Heathrow
23 Sept
LHR07:40London Heathrow
9h 10m
1 stop
SOU16:50Southampton Eastleigh
£240

KLM flights from Southampton to London Heathrow Airport

Our best KLM deals on Southampton to London Heathrow Airport flight tickets
KLM
16 Sept
SOU17:20Southampton Eastleigh
3h 35m
1 stop
LHR20:55London Heathrow
23 Sept
LHR20:55London Heathrow
11h 40m
1 stop
SOU08:35Southampton Eastleigh
£247
KLM
10 Sept
SOU17:20Southampton Eastleigh
3h 35m
1 stop
LHR20:55London Heathrow
16 Sept
LHR19:15London Heathrow
13h 20m
1 stop
SOU08:35Southampton Eastleigh
£259
KLM
7 Sept
SOU17:20Southampton Eastleigh
3h 35m
1 stop
LHR20:55London Heathrow
22 Sept
LHR19:15London Heathrow
13h 30m
1 stop
SOU08:45Southampton Eastleigh
£273

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 10 August 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

SouthamptonLondon

SOU Southampton Eastleigh - LHR London Heathrow

SOULHR

Southampton Eastleigh

Sat 5/9

19:25-14:15

1 stop18h 50m

London Heathrow

Sat 12/9

15:00-18:55

1 stop3h 55m

£227

SouthamptonLondon

SOU Southampton Eastleigh - LHR London Heathrow

SOULHR

Southampton Eastleigh

Wed 16/9

08:55-17:20

1 stop8h 25m

London Heathrow

Wed 23/9

07:40-16:50

1 stop9h 10m

£233

SouthamptonLondon

SOU Southampton Eastleigh - LHR London Heathrow

SOULHR

Southampton Eastleigh

Thu 10/9

17:20-08:05

1 stop14h 45m

London Heathrow

Wed 16/9

15:10-19:30

1 stop4h 20m

£234

SouthamptonLondon

SOU Southampton Eastleigh - LHR London Heathrow

SOULHR

Southampton Eastleigh

Wed 16/9

08:55-17:20

1 stop8h 25m

London Heathrow

Wed 23/9

07:40-16:50

1 stop9h 10m

£240

SouthamptonLondon

SOU Southampton Eastleigh - LHR London Heathrow

SOULHR

Southampton Eastleigh

Wed 16/9

17:20-20:55

1 stop3h 35m

London Heathrow

Wed 23/9

20:55-08:35

1 stop11h 40m

£247

SouthamptonLondon

SOU Southampton Eastleigh - LHR London Heathrow

SOULHR

Southampton Eastleigh

Thu 10/9

17:20-20:55

1 stop3h 35m

London Heathrow

Wed 16/9

19:15-08:35

1 stop13h 20m

£259
Fastest return journey

SouthamptonLondon

SOU Southampton Eastleigh - LHR London Heathrow

SOULHR

Southampton Eastleigh

Thu 3/9

09:20-13:55

1 stop4h 35m

London Heathrow

Thu 10/9

15:10-19:30

1 stop4h 20m

£259

SouthamptonLondon

SOU Southampton Eastleigh - LHR London Heathrow

SOULHR

Southampton Eastleigh

Thu 3/9

09:20-13:55

1 stop4h 35m

London Heathrow

Thu 10/9

15:10-19:30

1 stop4h 20m

£261

SouthamptonLondon

SOU Southampton Eastleigh - LHR London Heathrow

SOULHR

Southampton Eastleigh

Sat 5/9

09:20-20:20

1 stop11h 00m

London Heathrow

Sat 12/9

08:50-19:30

1 stop10h 40m

£264

SouthamptonLondon

SOU Southampton Eastleigh - LHR London Heathrow

SOULHR

Southampton Eastleigh

Sun 6/9

09:20-13:55

1 stop4h 35m

London Heathrow

Sun 13/9

22:00-08:40

1 stop10h 40m

£265

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 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 £1,049. 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 £1,346.

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 £722. 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 £1,091 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.

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

3h 35m

Direct flights

None
The fastest flight from Southampton to London Heathrow Airport takes 3h 35m
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 3h 35m, 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.

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Eastbourne
Wembley
Gatwick
Milton Keynes
Stratford-upon-Avon
Luton
Southend-on-Sea
Slough
Northampton
Ipswich
Maidstone
Swindon
Folkestone
Ilford
Hastings
Poole
Canterbury
Chichester
Hayes
Guildford

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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