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Cheap flights from Southampton to London Heathrow Airport from £101

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 16/10. Fares are subject to change and may not be available on all flights or dates of travel.
SOU — LHR
18 Jun — 25 Jun1
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 13 June 2025.

Round-trip from

£227

One-way from

£101

Good round-trip deal

£728 or less
KLM
  • KLM
  • 22/7-29/7
  • 2 total stops
  • 21h 25m total
  • Southampton to London
Search Deals
16/10
  • 16/10
  • 1 total stop
  • 11h 50m total
  • Southampton to London
Search Deals
Price to beat on a round-trip flight from Southampton Eastleigh to London Heathrow.
Search Deals

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 13 June 2025.

Tue 22/709:20SOU - LHR
1 stop10h 05mKLM
Tue 29/706:30LHR - SOU
1 stop11h 20mKLM
Deal found 11/6£227
Sat 13/908:55SOU - LHR
1 stop11h 25mBritish Airways
Sat 20/919:20LHR - SOU
1 stop13h 05mBritish Airways
Deal found 11/6£369

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 13 June 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

Tue 22/7

09:20-19:25

1 stop10h 05m

London Heathrow

Tue 29/7

06:30-17:50

1 stop11h 20m

£227

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Sat 13/9

08:55-20:20

1 stop11h 25m

London Heathrow

Sat 20/9

19:20-08:25

1 stop13h 05m

£369

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Thu 16/10

08:55-20:45

1 stop11h 50m

£101

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Sun 27/7

08:55-19:50

1 stop10h 55m

£194

Flights are sorted by cheapest return flights first.

Deals found on 12/6

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 13 June 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 24% on your trip compared to booking a flight in the evening.

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 13 June 2025.
KLM
7.8
Good
1,358 reviews
Check prices

Food

7.2

Entertainment

7.1

Overall

7.8

Boarding

7.8

Comfort

7.7

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Allan,Jun 2025

YYZ - AMS

I always enjoy flying KLM. Service is attentive, friendly and professional. The seat, when fully reclined is a little hard; some kind of mattress or topper would be helpful here. The dinner was really not very good …. “Meatless meatballs” tasted quite peculiar. Breakfast which consisted of an egg white omelette in flour tortilla was also rather tasteless.
KLM
7.8
Good
1,358 reviews
KLM
7.8
Good
1,358 reviews
Check prices

Food

7.2

Entertainment

7.1

Overall

7.8

Boarding

7.8

Comfort

7.7

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Allan,Jun 2025

YYZ - AMS

I always enjoy flying KLM. Service is attentive, friendly and professional. The seat, when fully reclined is a little hard; some kind of mattress or topper would be helpful here. The dinner was really not very good …. “Meatless meatballs” tasted quite peculiar. Breakfast which consisted of an egg white omelette in flour tortilla was also rather tasteless.
British Airways
6.6
Okay
7,011 reviews
KLM
7.8
Good
1,358 reviews
Check prices

Food

7.2

Entertainment

7.1

Overall

7.8

Boarding

7.8

Comfort

7.7

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Allan,Jun 2025

YYZ - AMS

I always enjoy flying KLM. Service is attentive, friendly and professional. The seat, when fully reclined is a little hard; some kind of mattress or topper would be helpful here. The dinner was really not very good …. “Meatless meatballs” tasted quite peculiar. Breakfast which consisted of an egg white omelette in flour tortilla was also rather tasteless.

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?

    KLM, at £227, was found to be the cheapest airline from Southampton to London Heathrow Airport. An alternate airline flying to your destination would be 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 £1,047, our data shows the cheapest flight currently is £692. When looking at the most popular route, (Southampton Eastleigh - London Heathrow), you can expect to pay £227 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?

Book flights to Southampton if you plan to visit one of these locations
Deal
Hounslow
Croydon
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Northampton
Gatwick
Luton
Slough
Wembley
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Eastbourne
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Swindon

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