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Cheap flights from Southampton to London Heathrow Airport from £78

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 23/3. Fares are subject to change and may not be available on all flights or dates of travel.
SOU — LHR
15 Feb — 22 Feb1
1 adult
1 adult, Economy, 0 bags

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 16 January 2026.

Round-trip from

£226

One-way from

£78
Aer Lingus
  • Aer Lingus
  • 11/2-18/2
  • 2 total stops
  • 10h 10m total
  • Southampton to London
Search Deals
23/3
  • 23/3
  • 1 total stop
  • 24h 10m total
  • Southampton to London
Search Deals

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 16 January 2026.

Wed 11/212:25
SOU
-
LHR
1 stop4h 25m
Aer Lingus
Wed 18/209:50
LHR
-
SOU
1 stop5h 45m
Aer Lingus
Deal found 14/1£226
Tue 27/115:20
SOU
-
LHR
2 stops17h 50m
Multiple Airlines
Thu 29/115:10
LHR
-
SOU
1 stop4h 30m
Multiple Airlines
Deal found 13/1£237
Tue 27/112:25
SOU
-
LHR
1 stop8h 40m
Aer Lingus
Thu 29/115:10
LHR
-
SOU
1 stop4h 30m
Aer Lingus
Deal found 13/1£241
Thu 12/209:00
SOU
-
LHR
1 stop7h 05m
KLM
Thu 19/220:25
LHR
-
SOU
1 stop12h 00m
KLM
Deal found 15/1£258
Fri 23/120:10
SOU
-
LHR
1 stop11h 55m
Aer Lingus
Mon 26/109:50
LHR
-
SOU
1 stop5h 45m
Aer Lingus
Deal found 14/1£270
Sun 1/309:30
SOU
-
LHR
1 stop4h 55m
Aer Lingus
Sun 8/320:45
LHR
-
SOU
1 stop12h 00m
Aer Lingus
Deal found 15/1£272
Wed 11/212:25
SOU
-
LHR
1 stop4h 25m
Multiple Airlines
Wed 18/208:40
LHR
-
SOU
2 stops6h 55m
Multiple Airlines
Deal found 14/1£278
Thu 26/215:00
SOU
-
LHR
1 stop5h 30m
British Airways
Mon 2/306:55
LHR
-
SOU
1 stop10h 35m
British Airways
Deal found 15/1£280
Sun 1/315:25
SOU
-
LHR
2 stops6h 15m
Multiple Airlines
Sun 8/307:00
LHR
-
SOU
1 stop7h 45m
Multiple Airlines
Deal found 15/1£289
Wed 11/312:00
SOU
-
LHR
1 stop7h 30m
British Airways
Thu 12/306:50
LHR
-
SOU
1 stop10h 40m
British Airways
Deal found 13/1£295
Thu 12/216:05
SOU
-
LHR
1 stop5h 00m
Aer Lingus
Thu 19/208:50
LHR
-
SOU
1 stop6h 45m
Aer Lingus
Deal found 15/1£300

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 16 January 2026.
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 11/2

12:25-16:50

1 stop4h 25m

London Heathrow

Wed 18/2

09:50-15:35

1 stop5h 45m

£226

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Tue 27/1

15:20-09:10

2 stops17h 50m

London Heathrow

Thu 29/1

15:10-19:40

1 stop4h 30m

£237

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Tue 27/1

12:25-21:05

1 stop8h 40m

London Heathrow

Thu 29/1

15:10-19:40

1 stop4h 30m

£241

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Thu 12/2

09:00-16:05

1 stop7h 05m

London Heathrow

Thu 19/2

20:25-08:25

1 stop12h 00m

£258

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Wed 11/2

17:35-07:40

1 stop14h 05m

London Heathrow

Wed 18/2

20:25-08:25

1 stop12h 00m

£270

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Sun 1/3

09:30-14:25

1 stop4h 55m

London Heathrow

Sun 8/3

20:45-08:45

1 stop12h 00m

£272

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Wed 11/3

12:00-19:30

1 stop7h 30m

London Heathrow

Thu 12/3

12:50-17:30

1 stop4h 40m

£280

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Thu 26/2

15:00-20:30

1 stop5h 30m

London Heathrow

Mon 2/3

06:55-17:30

1 stop10h 35m

£280

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Sun 1/3

15:25-21:40

2 stops6h 15m

London Heathrow

Sun 8/3

07:00-14:45

1 stop7h 45m

£289

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Mon 23/3

19:55-20:05

1 stop24h 10m

£78

Flights are sorted by cheapest return flights first.

Deals found on 13/1

Showing 1-10 of 16 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 16 January 2026.

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 30% 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 25m. Aer Lingus provides one of the quickest options available for as low as £226. 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
Luton
Northampton
Slough
Gatwick
Hounslow
Wembley
Ilford
Brentford
Hayes
Colchester
Watford
Crawley
Kingston upon Thames
Swindon
Bedford
Chelmsford
Eastbourne
Romford

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Southampton to Heathrow

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Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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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