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Cheap flights from London Heathrow Airport to Southampton from £122

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/3. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SOU
27 Feb — 6 Mar1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Heathrow to Southampton

Enter your travel dates to find the best prices.

Cheapest flights from Heathrow to Southampton
Explore the most affordable flight options available from Heathrow to Southampton. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 28 January 2026.

Thu 5/215:10
LHR
-
SOU
1 stop4h 30m
Aer Lingus
Tue 10/216:05
SOU
-
LHR
1 stop5h 00m
Aer Lingus
Deal found 27/1£233
Fri 13/320:25
LHR
-
SOU
1 stop12h 25m
KLM
Fri 20/317:35
SOU
-
LHR
1 stop3h 15m
KLM
Deal found 27/1£244
Sat 28/208:40
LHR
-
SOU
1 stop8h 20m
KLM
Sun 1/309:30
SOU
-
LHR
1 stop11h 20m
KLM
Deal found 26/1£245
Sat 28/206:30
LHR
-
SOU
1 stop10h 30m
KLM
Fri 6/317:35
SOU
-
LHR
1 stop3h 15m
KLM
Deal found 27/1£245
Tue 24/207:50
LHR
-
SOU
1 stop7h 45m
Aer Lingus
Tue 3/312:25
SOU
-
LHR
1 stop7h 25m
Aer Lingus
Deal found 27/1£248
Wed 8/420:55
LHR
-
SOU
1 stop11h 40m
KLM
Thu 30/409:05
SOU
-
LHR
1 stop10h 20m
KLM
Deal found 25/1£264
Mon 23/206:55
LHR
-
SOU
1 stop10h 35m
Multiple Airlines
Mon 2/312:00
SOU
-
LHR
1 stop7h 50m
Multiple Airlines
Deal found 26/1£279
Fri 20/307:10
LHR
-
SOU
1 stop10h 20m
British Airways
Tue 24/312:00
SOU
-
LHR
1 stop8h 25m
British Airways
Deal found 26/1£284
Mon 20/413:25
LHR
-
SOU
1 stop6h 05m
Aer Lingus
Thu 23/409:10
SOU
-
LHR
1 stop4h 45m
Aer Lingus
Deal found 26/1£293
Fri 22/522:15
LHR
-
SOU
1 stop13h 30m
Multiple Airlines
Fri 29/506:50
SOU
-
LHR
1 stop14h 20m
Multiple Airlines
Deal found 27/1£307
Sun 1/309:50
LHR
-
SOU
1 stop5h 45m
Aer Lingus
Sun 1/320:10
SOU
-
LHR
1 stop11h 55m
Aer Lingus
Deal found 27/1£323

Find flight deals from Heathrow to Southampton

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to Southampton (SOU). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 28 January 2026.

Round-trip from

£244

One-way from

£122
KLM
  • KLM
  • 13/3-20/3
  • 2 total stops
  • 15h 40m total
  • London to Southampton
Search Deals
12/3
  • 12/3
  • 1 total stop
  • 10h 40m total
  • London to Southampton
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Heathrow 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, Cheapflights users made 858,174 searches. Data last updated 28 January 2026.
Use the filters below to find and compare flights from London Heathrow Airport to Southampton that are best for you.

Fly from

Heathrow

Fly to

Southampton

Route

Depart

Return

Price

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Fri 13/3

20:25-08:50

1 stop12h 25m

Southampton Eastleigh

Fri 20/3

17:35-20:50

1 stop3h 15m

£244

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Sat 28/2

08:40-17:00

1 stop8h 20m

Southampton Eastleigh

Sun 1/3

09:30-20:50

1 stop11h 20m

£245

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Sat 28/2

06:30-17:00

1 stop10h 30m

Southampton Eastleigh

Fri 6/3

17:35-20:50

1 stop3h 15m

£245

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Tue 24/2

07:50-15:35

1 stop7h 45m

Southampton Eastleigh

Tue 3/3

12:25-19:50

1 stop7h 25m

£248

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Wed 8/4

20:55-08:35

1 stop11h 40m

Southampton Eastleigh

Thu 30/4

09:05-19:25

1 stop10h 20m

£264

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Mon 23/2

06:55-17:30

1 stop10h 35m

Southampton Eastleigh

Mon 2/3

12:00-19:50

1 stop7h 50m

£279

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Fri 20/3

07:10-17:30

1 stop10h 20m

Southampton Eastleigh

Tue 24/3

12:00-17:10

1 stop5h 10m

£284

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Sat 7/2

20:45-08:45

1 stop12h 00m

Southampton Eastleigh

Mon 9/2

16:05-21:05

1 stop5h 00m

£284

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Fri 22/5

22:15-11:45

1 stop13h 30m

Southampton Eastleigh

Fri 29/5

06:50-21:10

1 stop14h 20m

£307

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Sun 1/3

09:50-15:35

1 stop5h 45m

Southampton Eastleigh

Sun 1/3

20:10-08:05

1 stop11h 55m

£323

Flights are sorted by cheapest return flights first.

Deals found on 25/1

Showing 1-10 of 17 results
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Best time to book a flight from Heathrow to Southampton

Have a flexible travel schedule? Discover the best time to fly to Southampton from Heathrow with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from London Heathrow Airport to Southampton

What is the cheapest time of day to fly from LHR to SOU?

Find hourly flight availability from Heathrow to Southampton. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 28 January 2026.

When flying from London Heathrow Airport to Southampton, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Related info for your journey

Find useful and relevant information for your journey from Heathrow to Southampton. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Southampton from London Heathrow?

    Located just 3.5 mi from the city center, Southampton Eastleigh is the airport most travelers will use when flying to Southampton from London Heathrow. Booking flights from London Heathrow to Eastleigh (SOU) should be relatively easy as there are 0 daily inbound flights from London Heathrow from 0 different airlines.

  • How long is the flight from London Heathrow Airport to Southampton?

    KLM and Aer Lingus can get you from London Heathrow Airport to Southampton in just under 7h 45m. Your travel time can differ by up to 4h 40m. London Heathrow Airport and Southampton are separated by a distance of 53 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • Can I find deals for flights from Heathrow to Southampton that include hotel bookings?

    Yes. In addition to deals on Heathrow to Southampton flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Heathrow to Southampton?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Southampton.

  • Can I find deals for business class flights from Heathrow to Southampton?

    Yes. Cheapflights offers flight deals from Heathrow to Southampton by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Heathrow to Southampton

See prices for flight routes from nearby airports that may be better suited for you.
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Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Heathrow to Southampton?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Heathrow to Southampton. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Heathrow to Southampton?

Millions of users choose and trust Cheapflights to book the best flight deals from Heathrow to Southampton for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Heathrow to Southampton with no change fees?

Need flexible booking options for your flight to Southampton from Heathrow? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Heathrow to Southampton become cheaper?

Not ready to book yet? You can track prices for flights from Heathrow to Southampton on Cheapflights with our Price Alert feature and get notified when better prices are available.

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