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Cheap flights from London to Portsmouth from £45

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 3/6. Fares are subject to change and may not be available on all flights or dates of travel.
LON — LHR
9 Jun — 16 Jun1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from London to Portsmouth

Enter your travel dates to find the best prices.

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 10 May 2026.

Tue 2/611:35
STN
-
SOU
1 stop7h 55m
Multiple Airlines
Tue 9/620:00
SOU
-
STN
1 stop11h 50m
Multiple Airlines
Deal found 5/5£111
Wed 10/620:00
STN
-
SOU
1 stop12h 40m
Multiple Airlines
Sun 14/620:00
SOU
-
STN
1 stop11h 50m
Multiple Airlines
Deal found 8/5£112
Tue 2/609:40
LTN
-
SOU
1 stop9h 50m
Multiple Airlines
Tue 9/620:00
SOU
-
LTN
1 stop13h 15m
Multiple Airlines
Deal found 5/5£113
Wed 10/617:35
LGW
-
SOU
1 stop15h 05m
Multiple Airlines
Sun 14/620:00
SOU
-
LGW
1 stop11h 55m
Multiple Airlines
Deal found 8/5£113
Wed 3/613:50
LTN
-
SOU
1 stop5h 40m
Multiple Airlines
Wed 10/620:00
SOU
-
LTN
1 stop13h 00m
Multiple Airlines
Deal found 6/5£114
Sat 6/618:00
STN
-
SOU
1 stop14h 35m
Multiple Airlines
Sat 13/612:15
SOU
-
STN
1 stop9h 20m
Multiple Airlines
Deal found 9/5£114
Wed 3/606:30
STN
-
SOU
1 stop13h 00m
Multiple Airlines
Wed 10/620:00
SOU
-
STN
1 stop11h 50m
Multiple Airlines
Deal found 6/5£116
Wed 3/613:05
LGW
-
SOU
1 stop6h 25m
Multiple Airlines
Wed 10/620:00
SOU
-
LGW
1 stop11h 55m
Multiple Airlines
Deal found 6/5£117
Fri 5/619:15
STN
-
SOU
1 stop12h 05m
Multiple Airlines
Sun 7/620:00
SOU
-
STN
1 stop11h 50m
Multiple Airlines
Deal found 6/5£120
Mon 8/608:40
LGW
-
SOU
1 stop8h 10m
Multiple Airlines
Sun 14/620:00
SOU
-
LGW
1 stop12h 55m
Multiple Airlines
Deal found 10/5£123
Sat 6/621:25
LTN
-
SOU
1 stop11h 10m
Multiple Airlines
Sat 13/612:15
SOU
-
LTN
1 stop4h 30m
Multiple Airlines
Deal found 9/5£126
Sat 6/616:30
LTN
-
SOU
1 stop15h 25m
Multiple Airlines
Mon 8/620:40
SOU
-
LTN
1 stop12h 05m
Multiple Airlines
Deal found 5/5£128

Find flight deals from London to Portsmouth

Keep the following information in mind while searching for London to Portsmouth flight deals. Data was last updated 10 May 2026.

Round-trip from

£111

One-way from

£45
3/6-10/6
  • 3/6-10/6
  • 2 total stops
  • 29h 20m total
  • London to Portsmouth
Search Deals
3/6
  • 3/6
  • 1 total stop
  • 16h 20m total
  • London to Portsmouth
Search Deals

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 10 May 2026.
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

Cheapest return flight

LondonSouthampton

STN - SOU

STNSOU

London Stansted

Wed 10/6

20:00-08:40

1 stop12h 40m

Southampton Eastleigh

Sun 14/6

20:00-07:50

1 stop11h 50m

£112

LondonSouthampton

LTN - SOU

LTNSOU

London Luton

Tue 2/6

09:40-19:30

1 stop9h 50m

Southampton Eastleigh

Tue 9/6

20:00-09:15

1 stop13h 15m

£113

LondonSouthampton

LGW - SOU

LGWSOU

London Gatwick

Tue 2/6

13:10-19:30

1 stop6h 20m

Southampton Eastleigh

Tue 9/6

20:00-11:05

1 stop15h 05m

£113

LondonSouthampton

LGW - SOU

LGWSOU

London Gatwick

Wed 10/6

17:35-08:40

1 stop15h 05m

Southampton Eastleigh

Sun 14/6

20:00-07:55

1 stop11h 55m

£114

LondonSouthampton

LTN - SOU

LTNSOU

London Luton

Wed 3/6

13:50-19:30

1 stop5h 40m

Southampton Eastleigh

Wed 10/6

20:00-09:00

1 stop13h 00m

£114

LondonSouthampton

STN - SOU

STNSOU

London Stansted

Sat 6/6

18:00-08:35

1 stop14h 35m

Southampton Eastleigh

Sat 13/6

12:15-21:35

1 stop9h 20m

£114

LondonSouthampton

LGW - SOU

LGWSOU

London Gatwick

Wed 3/6

08:50-19:30

1 stop10h 40m

Southampton Eastleigh

Wed 10/6

20:00-07:55

1 stop11h 55m

£118

LondonSouthampton

LTN - SOU

LTNSOU

London Luton

Sat 6/6

21:25-08:35

1 stop11h 10m

Southampton Eastleigh

Sat 13/6

12:15-16:45

1 stop4h 30m

£126

LondonSouthampton

LTN - SOU

LTNSOU

London Luton

Sat 6/6

16:30-07:55

1 stop15h 25m

Southampton Eastleigh

Mon 8/6

20:40-08:45

1 stop12h 05m

£128

LondonSouthampton

STN - SOU

STNSOU

London Stansted

Wed 3/6

06:30-19:30

1 stop13h 00m

Southampton Eastleigh

Wed 10/6

20:00-20:30

2 stops24h 30m

£128

Flights are sorted by cheapest return flights first.

Deals found on 5/5

Showing 1-10 of 60 resultsSorted by cheapest first
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6

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 10 May 2026.

One of the essential ways to save on airfare from London to Portsmouth is to remain as flexible as possible. Flights that are at midday tend to be the most expensive. A flight in the evening could potentially save you up to 25% on airfare.

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 10h 20m. Fly via easyJet or KLM 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 City - Southampton Eastleigh or London Heathrow - Southampton Eastleigh, London Gatwick - 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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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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Manchester to Southend flights
London City to Newquay flights
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Newcastle upon Tyne to Southampton flights
Stansted to Newquay flights
Luton to Newquay flights
Gatwick to Bristol flights
Manchester to Edinburgh flights
London City to Bristol flights
London City to Newcastle upon Tyne flights
Heathrow to Bristol flights
Edinburgh to Birmingham flights
Edinburgh to Southampton flights
Exeter to Edinburgh flights
Birmingham to Gatwick flights

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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