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Cheap flights from Southampton to London Heathrow Airport from £114

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 15/8. Fares are subject to change and may not be available on all flights or dates of travel.
SOU — LHR
13 Aug — 20 Aug1
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 14 July 2026.

Tue 18/820:00
SOU
-
LHR
1 stop12h 05m
Aer Lingus
Tue 25/821:10
LHR
-
SOU
1 stop10h 55m
Aer Lingus
Deal found 9/7£219
Wed 5/809:15
SOU
-
LHR
1 stop11h 40m
KLM
Wed 12/819:15
LHR
-
SOU
1 stop13h 30m
KLM
Deal found 8/7£256
Fri 2/1017:20
SOU
-
LHR
1 stop3h 35m
KLM
Sat 3/1006:30
LHR
-
SOU
1 stop10h 20m
KLM
Deal found 10/7£257
Tue 18/814:15
SOU
-
LHR
1 stop5h 50m
Multiple Airlines
Tue 25/815:10
LHR
-
SOU
1 stop4h 20m
Multiple Airlines
Deal found 12/7£276
Thu 27/809:20
SOU
-
LHR
1 stop5h 40m
Aer Lingus
Thu 3/915:10
LHR
-
SOU
1 stop4h 20m
Aer Lingus
Deal found 13/7£277
Thu 6/820:00
SOU
-
LHR
1 stop12h 05m
Aer Lingus
Thu 13/815:10
LHR
-
SOU
1 stop4h 20m
Aer Lingus
Deal found 9/7£279
Fri 7/820:00
SOU
-
LHR
1 stop12h 05m
Aer Lingus
Thu 13/815:10
LHR
-
SOU
1 stop4h 20m
Aer Lingus
Deal found 11/7£280
Wed 4/1109:20
SOU
-
LHR
1 stop6h 15m
Multiple Airlines
Wed 4/1120:50
LHR
-
SOU
2 stops19h 45m
Multiple Airlines
Deal found 11/7£283
Wed 5/810:45
SOU
-
LHR
2 stops9h 35m
Multiple Airlines
Wed 12/815:10
LHR
-
SOU
1 stop4h 20m
Multiple Airlines
Deal found 8/7£298

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 14 July 2026.

Round-trip from

£219

One-way from

£114
Aer Lingus
  • Aer Lingus
  • 18/8-25/8
  • 2 total stops
  • 23h 00m total
  • Southampton to London
Search Deals
15/8
  • 15/8
  • 1 total stop
  • 19h 25m 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 14 July 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 18/8

20:00-08:05

1 stop12h 05m

London Heathrow

Tue 25/8

21:10-08:05

1 stop10h 55m

£219

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Wed 5/8

09:15-20:55

1 stop11h 40m

London Heathrow

Wed 12/8

19:15-08:45

1 stop13h 30m

£256

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Fri 2/10

17:20-20:55

1 stop3h 35m

London Heathrow

Sat 3/10

06:30-16:50

1 stop10h 20m

£257

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Tue 18/8

14:15-20:05

1 stop5h 50m

London Heathrow

Tue 25/8

15:10-19:30

1 stop4h 20m

£276
Fastest return journey

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Thu 27/8

09:20-15:00

1 stop5h 40m

London Heathrow

Thu 3/9

15:10-19:30

1 stop4h 20m

£277

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Wed 4/11

09:20-15:35

1 stop6h 15m

London Heathrow

Wed 4/11

20:50-16:35

2 stops19h 45m

£283

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Wed 5/8

10:45-20:20

2 stops9h 35m

London Heathrow

Wed 12/8

15:10-19:30

1 stop4h 20m

£298

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Fri 7/8

20:00-08:05

1 stop12h 05m

London Heathrow

Fri 14/8

15:10-19:30

1 stop4h 20m

£308

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Tue 29/9

09:15-15:00

1 stop5h 45m

London Heathrow

Thu 15/10

14:20-19:30

1 stop5h 10m

£324

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Thu 20/8

09:20-16:00

1 stop6h 40m

London Heathrow

Fri 21/8

21:10-08:40

1 stop11h 30m

£332

Flights are sorted by cheapest return flights first.

Deals found on 12/7

Showing 1-10 of 16 resultsSorted by cheapest first
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 14 July 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 42% 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 11h 40m. Aer Lingus provides one of the quickest options available for as low as £256. 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
Hounslow
Milton Keynes
Luton
Gatwick
Wembley
Slough
Ilford
Croydon
Hayes
Brentford
Colchester
Northampton
Watford
Eastbourne
Swindon
Southend-on-Sea
Poole
Kingston upon Thames
Southall
Aylesbury

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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