Cheap flights from London to Portsmouth from £57
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 6/11. Fares are subject to change and may not be available on all flights or dates of travel.
Cheap flight deals from London to Portsmouth
Keep the following information in mind while searching for London to Portsmouth flight deals. Data was last updated 5 September 2025.
Round-trip from | £129 |
---|---|
One-way from | £57 |
Find flight deals from London to Portsmouth
Cheapest flights from London to PortsmouthExplore the most affordable flight options available from London to Portsmouth. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 5 September 2025.
Explore the most affordable flight options available from London to Portsmouth. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 5 September 2025.
Cheapflights Fare Finder
Use the filters below to find and compare flights from London to Portsmouth that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
LondonSouthampton
LTN - SOU
LTNSOU
London Luton
Sat 4/10
20:30-07:55
1 stop11h 25m
Southampton Eastleigh
Tue 7/10
12:25-22:05
1 stop9h 40m
LondonSouthampton
STN - SOU
STNSOU
London Stansted
Sat 11/10
07:50-14:50
1 stop7h 00m
Southampton Eastleigh
Thu 23/10
15:05-21:20
1 stop6h 15m
LondonSouthampton
LTN - SOU
LTNSOU
London Luton
Sat 11/10
07:05-14:50
1 stop7h 45m
Southampton Eastleigh
Thu 23/10
15:05-22:10
1 stop7h 05m
LondonSouthampton
LTN - SOU
LTNSOU
London Luton
Thu 9/10
07:10-14:20
1 stop7h 10m
Southampton Eastleigh
Wed 15/10
09:00-19:20
1 stop10h 20m
LondonSouthampton
STN - SOU
STNSOU
London Stansted
Sat 4/10
07:50-14:50
1 stop7h 00m
Southampton Eastleigh
Tue 7/10
12:25-21:00
1 stop8h 35m
LondonSouthampton
LGW - SOU
LGWSOU
London Gatwick
Sat 11/10
18:45-08:35
1 stop13h 50m
Southampton Eastleigh
Thu 23/10
15:05-22:45
1 stop7h 40m
LondonSouthampton
LGW - SOU
LGWSOU
London Gatwick
Sat 4/10
21:30-08:35
1 stop11h 05m
Southampton Eastleigh
Tue 7/10
12:25-23:25
1 stop11h 00m
LondonSouthampton
LGW - SOU
LGWSOU
London Gatwick
Sat 4/10
21:30-08:35
1 stop11h 05m
Southampton Eastleigh
Sat 11/10
18:55-09:10
1 stop14h 15m
LondonSouthampton
STN - SOU
STNSOU
London Stansted
Thu 9/10
08:30-14:20
1 stop5h 50m
Southampton Eastleigh
Wed 15/10
15:45-07:55
1 stop16h 10m
LondonSouthampton
LGW - SOU
LGWSOU
London Gatwick
Thu 9/10
19:40-18:55
1 stop23h 15m
Southampton Eastleigh
Wed 15/10
09:00-16:20
1 stop7h 20m
Best time to book a flight from London to Portsmouth
Have a flexible travel schedule? Discover the best time to fly to Portsmouth from London with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight from London to Portsmouth
What is the cheapest time of day to fly from LON to P0R?
Find hourly flight availability from London 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 5 September 2025.
When flying from London to Portsmouth, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
Related info for your journey
Find useful and relevant information for your journey from London 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 London to Portsmouth
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How does Cheapflights help users find flights from London to Portsmouth?
Cheapflights makes it easy to find London to Portsmouth 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 London to Portsmouth?
By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Portsmouth from London.
Can Cheapflights find flights from London to Portsmouth with no change fees?
Certainly. Search results for flights to Portsmouth from London shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.
Can Cheapflights notify me if prices for flights from London 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 London today and book when prices fit your budget.