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Cheap flights from Southampton to London Heathrow Airport from £247

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/1. Fares are subject to change and may not be available on all flights or dates of travel.
SOU — LHR
21 Dec — 28 Dec1
1 adult
1 adult, Economy, 0 bags

Find flight deals from Southampton to Heathrow

Enter your travel dates to find the best prices.

Cheapest flights from Southampton to Heathrow
Explore the most affordable flight options available from Southampton to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 November 2025.

Fri 12/1219:50SOU - LHR
1 stop13h 20mMultiple Airlines
Mon 15/1209:55LHR - SOU
1 stop9h 25mMultiple Airlines
Deal found 20/11£295
Wed 17/1214:25SOU - LHR
1 stop5h 05mBritish Airways
Wed 24/1207:00LHR - SOU
1 stop3h 55mBritish Airways
Deal found 19/11£304
Wed 17/1214:25SOU - LHR
1 stop5h 05mMultiple Airlines
Wed 24/1207:00LHR - SOU
1 stop3h 55mMultiple Airlines
Deal found 19/11£317
Thu 4/1209:30SOU - LHR
1 stop6h 05mAer Lingus
Mon 8/1208:50LHR - SOU
1 stop6h 45mAer Lingus
Deal found 19/11£340
Sun 21/1216:00SOU - LHR
1 stop3h 55mBritish Airways
Mon 12/112:55LHR - SOU
1 stop4h 35mBritish Airways
Deal found 19/11£464
Thu 4/1214:35SOU - LHR
2 stops7h 10mMultiple Airlines
Mon 8/1212:55LHR - SOU
1 stop6h 40mMultiple Airlines
Deal found 19/11£478
Mon 22/1212:40SOU - LHR
1 stop4h 05mBritish Airways
Fri 9/113:15LHR - SOU
1 stop4h 15mBritish Airways
Deal found 19/11£516

Cheap flight deals from Southampton to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from Southampton (SOU) to Heathrow (LHR). 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 21 November 2025.

Round-trip from

£247
KLM
  • KLM
  • 8/1-12/1
  • 2 total stops
  • 13h 20m total
  • Southampton to London
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Southampton to Heathrow 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 21 November 2025.
Use the filters below to find and compare flights from Southampton to London Heathrow Airport that are best for you.

Fly from

Southampton

Fly to

Heathrow

Route

Depart

Return

Price

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Thu 8/1

09:00-17:00

1 stop8h 00m

London Heathrow

Mon 12/1

11:45-17:05

1 stop5h 20m

£247

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Sat 3/1

09:45-13:55

1 stop4h 10m

London Heathrow

Sat 10/1

06:55-16:40

1 stop9h 45m

£289

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Fri 12/12

19:50-09:10

1 stop13h 20m

London Heathrow

Mon 15/12

09:55-19:20

1 stop9h 25m

£295

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Sun 4/1

20:10-09:05

1 stop12h 55m

London Heathrow

Sun 11/1

08:50-15:35

1 stop6h 45m

£299

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Wed 17/12

14:25-19:30

1 stop5h 05m

London Heathrow

Wed 24/12

07:00-10:55

1 stop3h 55m

£304

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Mon 8/12

16:05-21:05

1 stop5h 00m

London Heathrow

Mon 15/12

07:50-15:35

1 stop7h 45m

£305

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Wed 17/12

14:25-19:30

1 stop5h 05m

London Heathrow

Wed 24/12

07:00-10:55

1 stop3h 55m

£317

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Fri 19/12

13:30-18:20

1 stop4h 50m

London Heathrow

Thu 15/1

12:50-17:30

1 stop4h 40m

£329

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Thu 4/12

09:30-15:35

1 stop6h 05m

London Heathrow

Mon 8/12

08:50-15:35

1 stop6h 45m

£340

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Tue 16/12

14:50-21:10

2 stops6h 20m

London Heathrow

Tue 23/12

19:50-10:55

1 stop15h 05m

£370

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 Southampton to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Southampton 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 Southampton to London Heathrow Airport

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

Find hourly flight availability from Southampton to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 21 November 2025.

A simple way to save on the total cost of your ticket is to fly from Southampton to London Heathrow Airport at midday. If you’re flexible enough to do this you can expect to save up to 23% on your trip compared to booking a flight in the afternoon.

Related info for your journey

Find useful and relevant information for your journey from Southampton to Heathrow. 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 from for flights from Southampton to London Heathrow?

    Southampton Eastleigh (SOU) is the airport you will fly out of if you book a flight from Southampton to London Heathrow. You should not have trouble finding flights to London Heathrow from Eastleigh; the airport handles an average of 0 outbound flights to London Heathrow per day. You should also have plenty of airline options to choose from since 0 airlines have flights from the Southampton airport to London Heathrow. It is only a 3.5 mi journey to Eastleigh (SOU) from Southampton’s city center.

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

    A quick flight from Southampton to London Heathrow Airport can take about 4h 10m. KLM provides one of the quickest options available for as low as £289. Southampton and London Heathrow Airport are separated by a distance of 53 mi. This flight may include one or multiple stops.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Southampton to Heathrow 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

Travelling to a place near London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Milton Keynes
Croydon
Slough
Gatwick
Hounslow
Northampton
Luton
Ilford
Wembley
Deal
Hayes
Colchester
Watford
Winchester
Swindon
Crawley
Brentford
Romford
Chichester
Ipswich

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Fly with Cheapflights

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

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Yes, we can. To see specific flights from Southampton to Heathrow with no change fees, users can toggle flexible booking options after using the search form above to find flights.

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

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

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