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Cheap flights from Southampton to London Heathrow Airport from £133

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 15/1. Fares are subject to change and may not be available on all flights or dates of travel.
SOU — LHR
1 Jan — 8 Jan1
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 2 December 2025.

Mon 29/1218:10SOU - LHR
1 stop13h 20mMultiple Airlines
Mon 5/118:45LHR - SOU
1 stop13h 40mMultiple Airlines
Deal found 1/12£296
Tue 30/1214:45SOU - LHR
1 stop5h 40mMultiple Airlines
Tue 6/106:40LHR - SOU
1 stop10h 50mMultiple Airlines
Deal found 1/12£297
Fri 19/1213:30SOU - LHR
1 stop7h 25mMultiple Airlines
Sun 21/1207:45LHR - SOU
1 stop11h 25mMultiple Airlines
Deal found 30/11£301
Tue 16/1212:25SOU - LHR
1 stop7h 25mAer Lingus
Sat 20/1220:45LHR - SOU
1 stop12h 00mAer Lingus
Deal found 1/12£311
Mon 29/1208:40SOU - LHR
1 stop12h 10mKLM
Mon 5/115:45LHR - SOU
1 stop17h 05mKLM
Deal found 30/11£344
Sat 20/1209:30SOU - LHR
1 stop4h 25mBritish Airways
Thu 8/113:55LHR - SOU
1 stop3h 35mBritish Airways
Deal found 30/11£370
Sun 28/1209:30SOU - LHR
1 stop11h 20mKLM
Sun 4/120:25LHR - SOU
1 stop12h 25mKLM
Deal found 30/11£415
Sun 28/1218:30SOU - LHR
2 stops13h 30mMultiple Airlines
Sun 4/106:50LHR - SOU
1 stop13h 10mMultiple Airlines
Deal found 30/11£420
Sun 28/1220:10SOU - LHR
1 stop11h 55mAer Lingus
Sun 4/118:45LHR - SOU
1 stop14h 00mAer Lingus
Deal found 30/11£540

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 2 December 2025.

Round-trip from

£222

One-way from

£133
Aer Lingus
  • Aer Lingus
  • 8/1-12/1
  • 2 total stops
  • 17h 20m total
  • Southampton to London
Search Deals
British Airways
  • British Airways
  • 15/1
  • 1 total stop
  • 9h 00m 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 2 December 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

20:10-08:05

1 stop11h 55m

London Heathrow

Mon 12/1

14:15-19:40

1 stop5h 25m

£222

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Wed 14/1

12:25-19:50

1 stop7h 25m

London Heathrow

Wed 21/1

19:45-08:45

1 stop13h 00m

£233

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Fri 8/5

17:20-20:55

1 stop3h 35m

London Heathrow

Sat 16/5

06:30-16:50

1 stop10h 20m

£259

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Fri 8/5

06:50-13:45

1 stop6h 55m

London Heathrow

Fri 8/5

22:10-11:45

1 stop13h 35m

£264

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Fri 16/1

12:00-16:15

1 stop4h 15m

London Heathrow

Mon 19/1

12:55-17:30

1 stop4h 35m

£280

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Mon 2/3

12:00-17:30

1 stop5h 30m

London Heathrow

Thu 5/3

06:50-17:30

1 stop10h 40m

£281

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Tue 30/12

14:45-20:25

1 stop5h 40m

London Heathrow

Tue 6/1

06:40-17:30

1 stop10h 50m

£297

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Fri 9/1

09:30-15:35

1 stop6h 05m

London Heathrow

Fri 9/1

19:45-08:45

1 stop13h 00m

£299

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Fri 19/12

13:30-20:55

1 stop7h 25m

London Heathrow

Sun 21/12

07:45-19:10

1 stop11h 25m

£301

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Tue 16/12

12:25-19:50

1 stop7h 25m

London Heathrow

Sat 20/12

20:45-08:45

1 stop12h 00m

£311

Flights are sorted by cheapest return flights first.

Deals found on 1/12

Showing 1-10 of 16 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 2 December 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 26% 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 3h 35m. Aer Lingus provides one of the quickest options available for as low as £259. 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
Northampton
Hounslow
Slough
Gatwick
Luton
Ilford
Wembley
Colchester
Brentford
Watford
Hayes
Crawley
Deal
Winchester
Swindon
Romford
Bedford
Chichester

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Alternative routes for Southampton to Heathrow

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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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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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