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Cheap flights from London Heathrow Airport to Southampton from £119

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 18/8. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SOU
29 Mar — 5 Apr1
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 27 February 2026.

Thu 12/317:50
LHR
-
SOU
1 stop13h 50m
Multiple Airlines
Mon 16/319:55
SOU
-
LHR
1 stop13h 15m
Multiple Airlines
Deal found 25/2£227
Mon 9/1120:25
LHR
-
SOU
1 stop11h 45m
KLM
Sat 19/1217:30
SOU
-
LHR
1 stop3h 20m
KLM
Deal found 24/2£250
Tue 24/308:50
LHR
-
SOU
1 stop6h 45m
Aer Lingus
Tue 31/309:10
SOU
-
LHR
1 stop8h 10m
Aer Lingus
Deal found 24/2£251
Fri 13/317:25
LHR
-
SOU
1 stop13h 20m
Multiple Airlines
Tue 17/312:25
SOU
-
LHR
1 stop4h 25m
Multiple Airlines
Deal found 26/2£254
Tue 24/320:25
LHR
-
SOU
1 stop11h 55m
KLM
Tue 31/317:20
SOU
-
LHR
1 stop3h 35m
KLM
Deal found 24/2£258
Mon 13/409:55
LHR
-
SOU
1 stop8h 55m
Multiple Airlines
Mon 20/419:20
SOU
-
LHR
1 stop13h 50m
Multiple Airlines
Deal found 27/2£269
Sat 28/320:45
LHR
-
SOU
1 stop10h 50m
Aer Lingus
Sat 4/409:10
SOU
-
LHR
1 stop6h 50m
Aer Lingus
Deal found 26/2£280
Wed 11/312:55
LHR
-
SOU
1 stop4h 35m
British Airways
Sat 14/317:15
SOU
-
LHR
1 stop15h 55m
British Airways
Deal found 24/2£285
Fri 27/315:10
LHR
-
SOU
1 stop4h 30m
Aer Lingus
Mon 30/320:00
SOU
-
LHR
1 stop12h 05m
Aer Lingus
Deal found 27/2£289
Fri 10/419:15
LHR
-
SOU
1 stop13h 30m
KLM
Fri 17/417:20
SOU
-
LHR
1 stop3h 35m
KLM
Deal found 24/2£292

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 27 February 2026.

Round-trip from

£227

One-way from

£119
12/3-16/3
  • 12/3-16/3
  • 2 total stops
  • 27h 05m total
  • London to Southampton
Search Deals
18/8
  • 18/8
  • 1 total stop
  • 22h 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 27 February 2026.
Use the filters below to find and compare flights from London Heathrow Airport to Southampton that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Fri 13/3

17:25-06:45

1 stop13h 20m

Southampton Eastleigh

Tue 17/3

12:25-16:50

1 stop4h 25m

£254

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Tue 24/3

20:25-08:20

1 stop11h 55m

Southampton Eastleigh

Tue 31/3

17:20-20:55

1 stop3h 35m

£258

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Fri 27/3

15:10-19:40

1 stop4h 30m

Southampton Eastleigh

Mon 30/3

20:00-08:05

1 stop12h 05m

£289

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Fri 10/4

19:15-08:45

1 stop13h 30m

Southampton Eastleigh

Fri 17/4

17:20-20:55

1 stop3h 35m

£292

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Thu 9/4

06:55-17:40

1 stop10h 45m

Southampton Eastleigh

Sun 12/4

14:50-21:00

1 stop6h 10m

£299

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Thu 18/6

19:15-08:35

1 stop13h 20m

Southampton Eastleigh

Tue 30/6

09:05-20:55

1 stop11h 50m

£304

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Fri 26/6

10:25-17:40

1 stop7h 15m

Southampton Eastleigh

Sun 28/6

14:50-21:00

1 stop6h 10m

£326

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Fri 20/3

06:05-18:30

1 stop12h 25m

Southampton Eastleigh

Tue 24/3

08:55-16:30

1 stop7h 35m

£341

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Mon 16/3

18:45-08:25

1 stop13h 40m

Southampton Eastleigh

Mon 23/3

12:00-19:50

1 stop7h 50m

£346

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Sat 14/3

06:55-16:45

1 stop9h 50m

Southampton Eastleigh

Sat 28/3

10:15-20:40

1 stop10h 25m

£360

Flights are sorted by cheapest return flights first.

Deals found on 26/2

Showing 1-10 of 19 resultsSorted by cheapest first
1
2

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 27 February 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, Aer Lingus, and British Airways can get you from London Heathrow Airport to Southampton in just under 4h 30m. Your travel time can differ by up to 7h 25m. 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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London City to Leeds flights
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Luton to Leeds flights
London City to Exeter flights
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Gatwick to Leeds flights
Stansted to Leeds flights
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Luton to Exeter flights
Stansted to Exeter flights
Stansted to Bristol flights

Fly with Cheapflights

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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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