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Cheap flights from Southampton to London Heathrow Airport from £150

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 11/9. Fares are subject to change and may not be available on all flights or dates of travel.
SOU — LHR
3 Sep — 10 Sep1
1 adult

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 29 August 2025.

Round-trip from

£229

One-way from

£150
Aer Lingus
  • Aer Lingus
  • 24/9-1/10
  • 2 total stops
  • 11h 05m total
  • Southampton to London
Search Deals
Aer Lingus
  • Aer Lingus
  • 11/9
  • 1 total stop
  • 14h 45m total
  • Southampton to London
Search Deals

Find flight deals from Southampton to Heathrow

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 29 August 2025.

Wed 24/909:10SOU - LHR
1 stop6h 45mAer Lingus
Wed 1/1015:10LHR - SOU
1 stop4h 20mAer Lingus
Deal found 27/8£229
Thu 16/1009:20SOU - LHR
1 stop8h 15mKLM
Wed 22/1020:55LHR - SOU
1 stop11h 50mKLM
Deal found 26/8£232
Mon 20/1020:00SOU - LHR
1 stop12h 00mAer Lingus
Fri 31/1015:10LHR - SOU
1 stop4h 30mAer Lingus
Deal found 27/8£243
Sat 11/1009:20SOU - LHR
1 stop11h 35mKLM
Sun 12/1020:55LHR - SOU
1 stop11h 50mKLM
Deal found 28/8£244
Tue 23/909:10SOU - LHR
1 stop4h 45mAer Lingus
Tue 30/908:50LHR - SOU
1 stop10h 40mAer Lingus
Deal found 26/8£256
Thu 23/1015:45SOU - LHR
1 stop5h 00mMultiple Airlines
Mon 27/1011:50LHR - SOU
1 stop6h 40mMultiple Airlines
Deal found 28/8£261
Thu 25/909:20SOU - LHR
1 stop10h 05mKLM
Thu 2/1020:55LHR - SOU
1 stop11h 50mKLM
Deal found 28/8£272
Fri 10/1020:00SOU - LHR
1 stop12h 00mAer Lingus
Fri 17/1014:20LHR - SOU
1 stop5h 10mAer Lingus
Deal found 26/8£313
Mon 17/1116:45SOU - LHR
1 stop4h 00mBritish Airways
Wed 19/1114:40LHR - SOU
1 stop4h 30mBritish Airways
Deal found 26/8£353
Tue 23/909:10SOU - LHR
1 stop4h 45mMultiple Airlines
Tue 30/908:50LHR - SOU
2 stops8h 10mMultiple Airlines
Deal found 26/8£354
Thu 11/915:45SOU - LHR
1 stop5h 00mBritish Airways
Thu 2/1010:35LHR - SOU
1 stop4h 40mBritish Airways
Deal found 26/8£480

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 29 August 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

Wed 24/9

09:10-15:55

1 stop6h 45m

London Heathrow

Wed 1/10

15:10-19:30

1 stop4h 20m

£229

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Sat 11/10

18:05-07:40

1 stop13h 35m

London Heathrow

Sun 12/10

20:55-08:45

1 stop11h 50m

£229

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Thu 16/10

09:20-17:35

1 stop8h 15m

London Heathrow

Wed 22/10

20:55-08:45

1 stop11h 50m

£232

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Mon 20/10

20:00-08:00

1 stop12h 00m

London Heathrow

Fri 31/10

15:10-19:40

1 stop4h 30m

£243

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Tue 23/9

09:10-13:55

1 stop4h 45m

London Heathrow

Tue 30/9

08:50-19:30

1 stop10h 40m

£256

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Thu 23/10

15:45-20:45

1 stop5h 00m

London Heathrow

Mon 27/10

11:50-18:30

1 stop6h 40m

£261

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Sun 12/10

09:20-17:50

1 stop8h 30m

London Heathrow

Sun 19/10

20:55-08:45

1 stop11h 50m

£272

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Thu 25/9

09:20-19:25

1 stop10h 05m

London Heathrow

Thu 2/10

20:55-08:45

1 stop11h 50m

£272

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Fri 10/10

20:00-08:00

1 stop12h 00m

London Heathrow

Fri 17/10

14:20-19:30

1 stop5h 10m

£313

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Thu 12/2

08:55-12:35

1 stop3h 40m

London Heathrow

Sun 1/3

06:50-11:50

1 stop5h 00m

£340

Flights are sorted by cheapest return flights first.

Deals found on 27/8

Showing 1-10 of 12 results
1
2

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 29 August 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 25% on your trip compared to booking a flight in the evening.

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 6h 45m. Aer Lingus provides one of the quickest options available for as low as £229. 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.

  • What is the cheapest month to book a flight from Southampton to London Heathrow Airport?

    Currently, January is the cheapest month in which you can book a flight from Southampton to London Heathrow Airport (average of £112). Flying from Southampton to London Heathrow Airport in August is currently the most expensive (average of £164). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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
Hounslow
Gatwick
Slough
Northampton
Luton
Deal
Wembley
Ilford
Crawley
Hayes
Watford
Folkestone
Ipswich
Chichester
Winchester
Eastbourne
Swindon
Dartford

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Fly with Cheapflights

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

Cheapflights makes it easy to find Southampton to Heathrow flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

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

Millions of users choose and trust Cheapflights to book the best flight deals from Southampton to Heathrow 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 Southampton to Heathrow with no change fees?

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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