Cheap flights from London Heathrow Airport to Portsmouth from £90
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 15/12. Fares are subject to change and may not be available on all flights or dates of travel.
Cheap flight deals from Heathrow to Portsmouth
Keep the following information in mind while searching for Heathrow to Portsmouth flight deals. Data was last updated 11 July 2025.
Find flight deals from Heathrow to Portsmouth
Cheapest flights from Heathrow to PortsmouthExplore the most affordable flight options available from Heathrow to Portsmouth. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 July 2025.
Explore the most affordable flight options available from Heathrow to Portsmouth. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 July 2025.
Cheapflights Fare Finder
Customise your flight search to find flights from Heathrow to Portsmouth 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 11 July 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Portsmouth that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
LondonSouthampton
LHR - SOU
LHRSOU
London Heathrow
Fri 5/9
20:55-07:55
1 stop11h 00m
Southampton Eastleigh
Tue 9/9
12:25-21:45
1 stop9h 20m
LondonSouthampton
LHR - SOU
LHRSOU
London Heathrow
Thu 7/8
20:55-08:45
1 stop11h 50m
Southampton Eastleigh
Wed 13/8
09:20-16:15
1 stop6h 55m
LondonSouthampton
LHR - SOU
LHRSOU
London Heathrow
Wed 20/8
21:10-08:40
1 stop11h 30m
Southampton Eastleigh
Wed 27/8
09:10-14:55
1 stop5h 45m
LondonSouthampton
LHR - SOU
LHRSOU
London Heathrow
Fri 10/10
07:25-12:00
1 stop4h 35m
Southampton Eastleigh
Thu 16/10
16:35-20:45
1 stop4h 10m
LondonSouthampton
LHR - SOU
LHRSOU
London Heathrow
Mon 15/12
09:55-19:20
1 stop9h 25m
LondonSouthampton
LHR - SOU
LHRSOU
London Heathrow
Fri 5/9
14:20-19:30
1 stop5h 10m
Best time to book a flight from Heathrow to Portsmouth
Have a flexible travel schedule? Discover the best time to fly to Portsmouth from Heathrow with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight from London Heathrow Airport to Portsmouth
What is the cheapest time of day to fly from LHR to P0R?
Find hourly flight availability from Heathrow to Portsmouth. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 11 July 2025.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London Heathrow Airport to Portsmouth as you normally would.
Reviews of airlines servicing Portsmouth
Get insights into the airlines that provide service to Portsmouth. 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 Portsmouth. Reviews last updated 11 July 2025.
Read through reviews of airlines operating flights from London Heathrow Airport to Portsmouth, such as KLM, Aer Lingus, andBritish Airways. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Crew
Food
Comfort
Boarding
Entertainment
Overall
Reviews
Anonymous,Jun 2025
AMS - BOS
Crew
Food
Comfort
Boarding
Entertainment
Overall
Reviews
Anonymous,Jun 2025
AMS - BOS
Crew
Food
Comfort
Boarding
Entertainment
Overall
Reviews
Anonymous,Jun 2025
AMS - BOS
Crew
Food
Comfort
Boarding
Entertainment
Overall
Reviews
Anonymous,Jun 2025
AMS - BOS
Related info for your journey
Find useful and relevant information for your journey from Heathrow to Portsmouth. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for Heathrow to Portsmouth
See prices for flight routes from nearby airports that may be better suited for you.
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How does Cheapflights help users find flights from Heathrow to Portsmouth?
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Why should you use Cheapflights to find cheap flight tickets from Heathrow to Portsmouth?
Cheapflights simply makes it quick and affordable to book flights from Heathrow to Portsmouth by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.
Can Cheapflights find flights from Heathrow to Portsmouth with no change fees?
Need flexible booking options for your flight to Portsmouth from Heathrow? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.
Can Cheapflights notify me if prices for flights from Heathrow to Portsmouth become cheaper?
Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Portsmouth from Heathrow today and book when prices fit your budget.