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Cheap flights from Southampton to London Heathrow Airport from £227

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 6/6. Fares are subject to change and may not be available on all flights or dates of travel.
SOU — LHR
18 May — 25 May1
1 adult
1 adult, Economy, 0 bags

Cheap 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 18 April 2026.

Tue 12/509:20
SOU
-
LHR
1 stop9h 35m
Aer Lingus
Tue 19/515:10
LHR
-
SOU
1 stop4h 20m
Aer Lingus
Deal found 14/4£245
Tue 12/517:20
SOU
-
LHR
1 stop3h 35m
KLM
Tue 19/519:15
LHR
-
SOU
1 stop13h 20m
KLM
Deal found 14/4£246
Sat 9/517:20
SOU
-
LHR
1 stop3h 35m
KLM
Sun 10/518:35
LHR
-
SOU
1 stop14h 00m
KLM
Deal found 15/4£270
Thu 4/617:20
SOU
-
LHR
1 stop3h 35m
KLM
Wed 10/619:15
LHR
-
SOU
1 stop13h 20m
KLM
Deal found 16/4£272
Thu 28/520:00
SOU
-
LHR
1 stop12h 05m
Aer Lingus
Thu 4/615:10
LHR
-
SOU
1 stop4h 20m
Aer Lingus
Deal found 13/4£274
Sat 18/420:00
SOU
-
LHR
1 stop12h 05m
Aer Lingus
Wed 22/421:10
LHR
-
SOU
1 stop11h 30m
Aer Lingus
Deal found 15/4£299
Tue 12/512:20
SOU
-
LHR
2 stops6h 00m
Multiple Airlines
Tue 19/515:10
LHR
-
SOU
1 stop4h 20m
Multiple Airlines
Deal found 14/4£302
Tue 21/408:55
SOU
-
LHR
1 stop12h 45m
Multiple Airlines
Wed 22/407:40
LHR
-
SOU
1 stop11h 20m
Multiple Airlines
Deal found 14/4£306
Thu 30/420:00
SOU
-
LHR
1 stop12h 05m
Aer Lingus
Mon 4/521:10
LHR
-
SOU
1 stop11h 30m
Aer Lingus
Deal found 15/4£309
Tue 19/512:35
SOU
-
LHR
1 stop9h 05m
Multiple Airlines
Fri 29/506:45
LHR
-
SOU
1 stop11h 00m
Multiple Airlines
Deal found 17/4£319
Fri 29/506:50
SOU
-
LHR
1 stop14h 20m
British Airways
Fri 5/622:15
LHR
-
SOU
1 stop13h 30m
British Airways
Deal found 16/4£321

Find 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 18 April 2026.

Round-trip from

£245

One-way from

£227
Aer Lingus
  • Aer Lingus
  • 12/5-19/5
  • 2 total stops
  • 13h 55m total
  • Southampton to London
Search Deals
British Airways
  • British Airways
  • 6/6
  • 1 total stop
  • 3h 35m 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 18 April 2026.
Use the filters below to find and compare flights from Southampton to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Tue 12/5

09:20-18:55

1 stop9h 35m

London Heathrow

Tue 19/5

15:10-19:30

1 stop4h 20m

£245

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Thu 28/5

20:00-08:05

1 stop12h 05m

London Heathrow

Thu 4/6

15:10-19:30

1 stop4h 20m

£274

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Tue 12/5

19:40-11:45

1 stop16h 05m

London Heathrow

Tue 19/5

06:45-20:45

1 stop14h 00m

£302

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Tue 19/5

12:35-21:40

1 stop9h 05m

London Heathrow

Fri 29/5

06:45-17:45

1 stop11h 00m

£319

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Wed 1/7

12:20-17:10

1 stop4h 50m

London Heathrow

Fri 3/7

22:15-12:00

1 stop13h 45m

£327

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Fri 15/5

06:45-18:00

1 stop11h 15m

London Heathrow

Fri 22/5

22:15-12:00

1 stop13h 45m

£330

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Sat 16/5

12:35-20:20

1 stop7h 45m

London Heathrow

Sun 17/5

07:35-14:15

1 stop6h 40m

£377
Fastest return journey

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Fri 29/5

06:50-11:45

1 stop4h 55m

London Heathrow

Sun 7/6

07:35-14:15

1 stop6h 40m

£386

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Wed 13/5

08:55-19:40

1 stop10h 45m

London Heathrow

Sat 16/5

08:00-14:30

1 stop6h 30m

£405
Cheapest one-way
Fastest single journey

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Sat 6/6

16:45-20:20

1 stop3h 35m

£227

Flights are sorted by cheapest return flights first.

Deals found on 13/4

Sorted by cheapest first

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 18 April 2026.

A simple way to save on the total cost of your ticket is to fly from Southampton to London Heathrow Airport in the morning. If you’re flexible enough to do this you can expect to save up to 49% 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 9h 35m. Aer Lingus provides one of the quickest options available for as low as £245. Southampton and London Heathrow Airport are separated by a distance of 53 mi.

  • 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
Wembley
Croydon
Northampton
Hounslow
Luton
Gatwick
Slough
Ilford
Hayes
Brentford
Colchester
Watford
Kingston upon Thames
Romford
Eastbourne
Swindon
Chelmsford
Ipswich
Southend-on-Sea

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Southampton to Heathrow

See prices for flight routes from nearby airports that may be better suited for you.
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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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