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Cheap flights from Southampton to London Heathrow Airport from £174

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 15/5. Fares are subject to change and may not be available on all flights or dates of travel.
SOU — LHR
25 Mar — 1 Apr1
1 adult

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 20 March 2025.

Round-trip from

£174

Good round-trip deal

£727 or less

Good one-way deal

£472 or less
Aer Lingus
  • Aer Lingus
  • 15/5-19/5
  • 2 total stops
  • 24h 10m total
  • Southampton to London
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Price to beat on a round-trip flight from Southampton Eastleigh to London Heathrow.
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Price to beat on a one-way flight from Southampton Eastleigh to London Heathrow.
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Find flight deals from Southampton to Heathrow

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 20 March 2025.

Thu 15/520:00SOU - LHR
1 stop13h 05mAer Lingus
Mon 19/521:10LHR - SOU
1 stop11h 05mAer Lingus
Deal found 20/3£174
Wed 2/408:55SOU - LHR
1 stop4h 05mMultiple Airlines
Wed 23/415:10LHR - SOU
1 stop4h 20mMultiple Airlines
Deal found 20/3£264
Thu 26/609:30SOU - LHR
1 stop11h 25mKLM
Thu 31/720:55LHR - SOU
1 stop11h 50mKLM
Deal found 19/3£313
Sat 10/516:45SOU - LHR
1 stop3h 35mBritish Airways
Sun 11/508:50LHR - SOU
1 stop3h 50mBritish Airways
Deal found 20/3£331

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 20 March 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 15/5

20:00-09:05

1 stop13h 05m

London Heathrow

Mon 19/5

21:10-08:15

1 stop11h 05m

£174

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Wed 2/4

08:55-13:00

1 stop4h 05m

London Heathrow

Wed 23/4

15:10-19:30

1 stop4h 20m

£264

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Thu 26/6

09:30-20:55

1 stop11h 25m

London Heathrow

Thu 31/7

20:55-08:45

1 stop11h 50m

£313

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Sat 10/5

16:45-20:20

1 stop3h 35m

London Heathrow

Sun 11/5

08:50-12:40

1 stop3h 50m

£331

Flights are sorted by cheapest return flights first.

Deals found on 20/3

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 20 March 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 13% on your trip compared to booking a flight in the morning.

Rainfall in Heathrow by month

Plan your trip to Heathrow by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in London Heathrow Airport ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London Heathrow Airport when rainfall is around 40.0 mm.

Temperature in Heathrow by month

Plan your trip to Heathrow by taking into account the average temperature totals by month.

If weather is an important factor for your trip to London Heathrow Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Heathrow. Reviews last updated 20 March 2025.
KLM
7.8
Good
1,319 reviews
Check prices

Food

7.3

Overall

7.8

Boarding

7.8

Comfort

7.7

Crew

8.4

Entertainment

7.2

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
KLM
7.8
Good
1,319 reviews
KLM
7.8
Good
1,319 reviews
Check prices

Food

7.3

Overall

7.8

Boarding

7.8

Comfort

7.7

Crew

8.4

Entertainment

7.2

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
Aer Lingus
7.0
Good
1,063 reviews
KLM
7.8
Good
1,319 reviews
Check prices

Food

7.3

Overall

7.8

Boarding

7.8

Comfort

7.7

Crew

8.4

Entertainment

7.2

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
British Airways
6.6
Okay
6,710 reviews
KLM
7.8
Good
1,319 reviews
Check prices

Food

7.3

Overall

7.8

Boarding

7.8

Comfort

7.7

Crew

8.4

Entertainment

7.2

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.

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.

  • What are the cheapest airlines flying from Southampton to London Heathrow Airport round-trip?

    Aer Lingus, at £174, was found to be the cheapest airline from Southampton to London Heathrow Airport.Alternate airlines flying return to your destination include KLM and British Airways.

  • What are the cheapest flights from Southampton to London Heathrow Airport?

    While on average a flight from Southampton to London Heathrow Airport is generally £672, our data shows the cheapest flight currently is £453. When looking at the most popular route, (Southampton Eastleigh - London Heathrow), you can expect to pay £241 for that flight.

  • 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.

  • What is the cheapest month to book a flight from Southampton to London Heathrow Airport?

    Currently, January is the cheapest month in which you can book a flight from Southampton to London Heathrow Airport (average of £112). Flying from Southampton to London Heathrow Airport in August is currently the most expensive (average of £164). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near Southampton?

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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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