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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.
LON — LHR
10 Sep — 17 Sep1
1 adult

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
easyJet
  • easyJet
  • 9/10-15/10
  • 2 total stops
  • 17h 30m total
  • London to Portsmouth
Search Deals
6/11
  • 6/11
  • 1 total stop
  • 11h 15m total
  • London to Portsmouth
Search Deals

Find flight deals from London to Portsmouth

Cheapest flights from London to Portsmouth
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.

Sat 4/1020:30LTN - SOU
1 stop11h 25measyJet
Tue 7/1012:25SOU - LTN
1 stop9h 40measyJet
Deal found 5/9£115
Sat 11/1007:50STN - SOU
1 stop7h 00measyJet
Thu 23/1015:05SOU - STN
1 stop6h 15measyJet
Deal found 5/9£122
Sat 11/1007:05LTN - SOU
1 stop7h 45measyJet
Thu 23/1015:05SOU - LTN
1 stop7h 05measyJet
Deal found 5/9£124
Thu 9/1007:10LTN - SOU
1 stop7h 10measyJet
Wed 15/1009:00SOU - LTN
1 stop10h 20measyJet
Deal found 4/9£129
Sat 4/1007:50STN - SOU
1 stop7h 00measyJet
Tue 7/1012:25SOU - STN
1 stop8h 35measyJet
Deal found 5/9£133
Sat 11/1018:45LGW - SOU
1 stop13h 50mMultiple Airlines
Thu 23/1015:05SOU - LGW
1 stop7h 40mMultiple Airlines
Deal found 5/9£137
Sat 4/1021:30LGW - SOU
1 stop11h 05mMultiple Airlines
Tue 7/1012:25SOU - LGW
1 stop11h 00mMultiple Airlines
Deal found 5/9£138
Sat 4/1021:30LGW - SOU
1 stop11h 05mMultiple Airlines
Sat 11/1018:55SOU - LGW
1 stop14h 15mMultiple Airlines
Deal found 4/9£138
Thu 9/1008:30STN - SOU
1 stop5h 50mMultiple Airlines
Wed 15/1015:45SOU - STN
1 stop16h 10mMultiple Airlines
Deal found 5/9£145
Thu 9/1019:40LGW - SOU
1 stop23h 15mMultiple Airlines
Wed 15/1009:00SOU - LGW
1 stop7h 20mMultiple Airlines
Deal found 4/9£146
Sun 19/1018:00LGW - SOU
1 stop13h 40mMultiple Airlines
Tue 21/1008:55SOU - LGW
1 stop13h 30mMultiple Airlines
Deal found 5/9£153
Sun 19/1019:45LTN - SOU
1 stop13h 25mMultiple Airlines
Tue 21/1020:00SOU - LTN
1 stop13h 25mMultiple Airlines
Deal found 5/9£154

Cheapflights Fare Finder

 
Customise your flight search to find flights from London 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 5 September 2025.
Use the filters below to find and compare flights from London to Portsmouth that are best for you.

Fly from

London

Fly to

Portsmouth

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

£115

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

£122

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

£124

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

£129

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

£133

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

£137

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

£138

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

£138

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

£145

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

£146

Flights are sorted by cheapest return flights first.

Deals found on 4/9

Showing 1-10 of 52 results
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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.
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 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.

  • How long is the flight from London to Portsmouth?

    There are many flights that can get you from London to Portsmouth in 11h 10m. Fly via easyJet or Aer Lingus to get the fastest option. The distance from London to Portsmouth is about 53 mi. Both multi-stop and direct flights can be found to your destination and back.

  • What are the most popular routes from London to Portsmouth?

    While some choose either London Gatwick - Southampton Eastleigh or London Heathrow - Southampton Eastleigh, London City - Southampton Eastleigh is the most popular route from London to Portsmouth.

  • Can I find deals for flights from London to Portsmouth that include hotel bookings?

    Yes. In addition to deals on London to Portsmouth flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from London to Portsmouth?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to Portsmouth.

  • Can I find deals for business class flights from London to Portsmouth?

    Yes. Cheapflights offers flight deals from London to Portsmouth 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 London to Portsmouth?

    Currently, January is the cheapest month in which you can book a flight from London to Portsmouth (average of £112). Flying from London to Portsmouth 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

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Alternative routes for London to Portsmouth

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 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.

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