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Cheap flights from London Heathrow Airport to Southampton from £147

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 15/12. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SOU
20 Dec — 27 Dec1
1 adult
1 adult, Economy, 0 bags

Find 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 20 November 2025.

Sat 6/1214:05LHR - SOU
1 stop18h 45mKLM
Sat 13/1217:30SOU - LHR
1 stop14h 10mKLM
Deal found 18/11£271
Wed 17/1220:25LHR - SOU
1 stop11h 55mKLM
Wed 24/1208:40SOU - LHR
1 stop8h 20mKLM
Deal found 19/11£289
Fri 5/1221:10LHR - SOU
1 stop14h 55mMultiple Airlines
Tue 9/1214:35SOU - LHR
1 stop3h 30mMultiple Airlines
Deal found 20/11£301
Wed 17/1207:50LHR - SOU
1 stop7h 45mAer Lingus
Wed 24/1212:25SOU - LHR
1 stop7h 25mAer Lingus
Deal found 19/11£301
Wed 17/1207:50LHR - SOU
1 stop7h 45mAer Lingus
Fri 19/1216:05SOU - LHR
1 stop5h 00mAer Lingus
Deal found 19/11£333
Wed 19/1108:40LHR - SOU
1 stop5h 25mMultiple Airlines
Wed 26/1119:50SOU - LHR
1 stop12h 30mMultiple Airlines
Deal found 18/11£350
Fri 19/1208:40LHR - SOU
1 stop8h 20mKLM
Fri 26/1208:40SOU - LHR
1 stop10h 35mKLM
Deal found 18/11£357
Wed 17/1208:05LHR - SOU
2 stops5h 50mMultiple Airlines
Wed 24/1208:35SOU - LHR
1 stop4h 50mMultiple Airlines
Deal found 19/11£426

Cheap 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 20 November 2025.

Round-trip from

£243

One-way from

£147
Aer Lingus
  • Aer Lingus
  • 1/1-7/1
  • 2 total stops
  • 19h 15m total
  • London to Southampton
Search Deals
Aer Lingus
  • Aer Lingus
  • 15/12
  • 1 total stop
  • 15h 10m 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 20 November 2025.
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

Thu 1/1

07:50-19:40

1 stop11h 50m

Southampton Eastleigh

Wed 7/1

12:25-19:50

1 stop7h 25m

£243

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Sat 3/1

20:45-08:45

1 stop12h 00m

Southampton Eastleigh

Sat 10/1

09:30-15:35

1 stop6h 05m

£262

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Sat 6/12

14:05-08:50

1 stop18h 45m

Southampton Eastleigh

Sat 13/12

17:30-07:40

1 stop14h 10m

£271

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Wed 17/12

20:25-08:20

1 stop11h 55m

Southampton Eastleigh

Wed 24/12

08:40-17:00

1 stop8h 20m

£289

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Fri 27/3

07:10-17:30

1 stop10h 20m

Southampton Eastleigh

Tue 31/3

18:20-22:35

1 stop4h 15m

£295

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Fri 5/12

21:10-12:05

1 stop14h 55m

Southampton Eastleigh

Tue 9/12

14:35-18:05

1 stop3h 30m

£301

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Thu 1/1

07:45-11:50

1 stop4h 05m

Southampton Eastleigh

Wed 7/1

12:00-18:25

1 stop6h 25m

£303

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Sat 3/1

18:45-08:45

1 stop14h 00m

Southampton Eastleigh

Sat 10/1

09:25-19:50

2 stops10h 25m

£310

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Mon 15/12

20:45-11:55

1 stop15h 10m

£147

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Tue 16/12

14:15-19:40

1 stop5h 25m

£152

Flights are sorted by cheapest return flights first.

Deals found on 18/11

Showing 1-10 of 11 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 20 November 2025.

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?

    Aer Lingus and KLM can get you from London Heathrow Airport to Southampton in just under 11h 50m. Your travel time can differ by up to 6h 55m. 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

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

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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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