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Cheap flights from Southampton to London Heathrow Airport from £140

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 6/4. Fares are subject to change and may not be available on all flights or dates of travel.
SOU — LHR
17 Apr — 24 Apr1
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 March 2026.

Thu 16/409:20
SOU
-
LHR
1 stop6h 40m
Multiple Airlines
Thu 23/420:50
LHR
-
SOU
1 stop11h 55m
Multiple Airlines
Deal found 17/3£223
Tue 28/413:25
SOU
-
LHR
1 stop7h 25m
Multiple Airlines
Tue 5/506:15
LHR
-
SOU
1 stop6h 35m
Multiple Airlines
Deal found 15/3£229
Tue 14/417:20
SOU
-
LHR
1 stop3h 35m
KLM
Tue 21/419:15
LHR
-
SOU
1 stop13h 20m
KLM
Deal found 17/3£242
Tue 14/413:25
SOU
-
LHR
1 stop9h 15m
Multiple Airlines
Tue 21/406:15
LHR
-
SOU
1 stop6h 35m
Multiple Airlines
Deal found 17/3£244
Sat 21/313:55
SOU
-
LHR
1 stop6h 15m
Multiple Airlines
Sat 28/306:25
LHR
-
SOU
1 stop6h 45m
Multiple Airlines
Deal found 15/3£245
Sat 11/409:20
SOU
-
LHR
1 stop10h 40m
Multiple Airlines
Sat 18/406:15
LHR
-
SOU
1 stop13h 15m
Multiple Airlines
Deal found 14/3£260
Fri 3/417:20
SOU
-
LHR
1 stop3h 35m
KLM
Fri 17/420:55
LHR
-
SOU
1 stop11h 50m
KLM
Deal found 13/3£261
Tue 31/309:20
SOU
-
LHR
1 stop11h 25m
Multiple Airlines
Sat 4/406:15
LHR
-
SOU
1 stop13h 15m
Multiple Airlines
Deal found 16/3£263
Mon 27/419:20
SOU
-
LHR
1 stop13h 50m
Multiple Airlines
Mon 4/509:50
LHR
-
SOU
1 stop9h 40m
Multiple Airlines
Deal found 15/3£273
Mon 13/409:20
SOU
-
LHR
1 stop5h 40m
Aer Lingus
Mon 20/408:50
LHR
-
SOU
1 stop10h 40m
Aer Lingus
Deal found 16/3£275

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 March 2026.

Round-trip from

£223

One-way from

£140
16/4-23/4
  • 16/4-23/4
  • 2 total stops
  • 18h 35m total
  • Southampton to London
Search Deals
6/4
  • 6/4
  • 1 total stop
  • 13h 50m 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 March 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 14/4

13:25-22:40

1 stop9h 15m

London Heathrow

Tue 21/4

06:15-12:50

1 stop6h 35m

£244

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Fri 3/4

17:20-20:55

1 stop3h 35m

London Heathrow

Fri 17/4

20:55-08:45

1 stop11h 50m

£261

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Mon 27/4

19:20-09:10

1 stop13h 50m

London Heathrow

Mon 4/5

09:50-19:30

1 stop9h 40m

£273

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Mon 13/4

09:20-15:00

1 stop5h 40m

London Heathrow

Mon 20/4

08:50-19:30

1 stop10h 40m

£275
Fastest return journey

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Tue 28/4

13:25-20:20

2 stops6h 55m

London Heathrow

Tue 5/5

14:20-19:30

1 stop5h 10m

£286

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Fri 3/4

17:20-20:55

1 stop3h 35m

London Heathrow

Sat 4/4

06:30-16:50

1 stop10h 20m

£288

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Thu 16/4

18:20-09:10

1 stop14h 50m

London Heathrow

Mon 20/4

06:45-20:45

1 stop14h 00m

£290

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Wed 1/4

12:35-17:25

1 stop4h 50m

London Heathrow

Sun 5/4

07:45-20:45

1 stop13h 00m

£296

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Sat 11/4

20:00-08:05

1 stop12h 05m

London Heathrow

Sat 18/4

08:50-16:50

1 stop8h 00m

£300
Cheapest one-way

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Mon 6/4

19:20-09:10

1 stop13h 50m

£140

Flights are sorted by cheapest return flights first.

Deals found on 15/3

Showing 1-10 of 15 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 18 March 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 46% 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 3h 35m. KLM provides one of the quickest options available for as low as £261. 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
Wembley
Croydon
Northampton
Luton
Hounslow
Slough
Gatwick
Ilford
Hayes
Brentford
Colchester
Guildford
Watford
Kingston upon Thames
Eastbourne
Romford
Ipswich
Swindon
Bedford

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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