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Cheap flights from London to Portsmouth from £66

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 21/1. Fares are subject to change and may not be available on all flights or dates of travel.
LON — LHR
9 Jan — 16 Jan1
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 December 2025.

Fri 12/1206:55LTN - SOU
1 stop6h 50measyJet
Fri 19/1208:10SOU - LTN
1 stop14h 00measyJet
Deal found 8/12£151
Fri 12/1206:55LTN - SOU
1 stop6h 50mMultiple Airlines
Fri 19/1208:10SOU - LTN
2 stops14h 00mMultiple Airlines
Deal found 8/12£170
Fri 12/1206:50STN - SOU
2 stops23h 55mMultiple Airlines
Fri 19/1208:10SOU - STN
1 stop7h 15mMultiple Airlines
Deal found 8/12£197
Sun 14/1207:10SEN - SOU
1 stop7h 35mMultiple Airlines
Mon 15/1208:30SOU - SEN
2 stops14h 30mMultiple Airlines
Deal found 9/12£204
Fri 12/1216:00LGW - SOU
2 stops14h 45measyJet
Fri 19/1208:10SOU - LGW
1 stop15h 00measyJet
Deal found 8/12£218
Fri 12/1213:00LGW - SOU
1 stop6h 20mMultiple Airlines
Fri 19/1208:10SOU - LGW
1 stop15h 00mMultiple Airlines
Deal found 8/12£223
Mon 22/1205:55STN - SOU
1 stop8h 05mMultiple Airlines
Fri 26/1208:10SOU - STN
1 stop15h 45mMultiple Airlines
Deal found 7/12£267
Mon 22/1206:00LTN - SOU
1 stop13h 40mMultiple Airlines
Fri 26/1216:05SOU - LTN
1 stop4h 25mMultiple Airlines
Deal found 7/12£294
Mon 22/1214:50LGW - SOU
1 stop4h 50mMultiple Airlines
Fri 26/1208:10SOU - LGW
1 stop10h 40mMultiple Airlines
Deal found 7/12£318
Sun 14/1206:50LHR - SOU
1 stop5h 00mBritish Airways
Sun 21/1216:35SOU - LHR
1 stop4h 20mBritish Airways
Deal found 9/12£367
Tue 23/1218:50LTN - SOU
1 stop14h 00mMultiple Airlines
Sat 27/1213:55SOU - LTN
2 stops17h 40mMultiple Airlines
Deal found 8/12£397
Mon 29/1208:35LGW - SOU
1 stop12h 15mAurigny Air
Fri 2/121:20SOU - LGW
1 stop13h 05mAurigny Air
Deal found 9/12£399

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 December 2025.

Round-trip from

£127

One-way from

£66
easyJet
  • easyJet
  • 8/1-12/1
  • 2 total stops
  • 9h 45m total
  • London to Portsmouth
Search Deals
21/1
  • 21/1
  • 1 total stop
  • 13h 50m 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 December 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

Thu 8/1

12:30-17:20

1 stop4h 50m

Southampton Eastleigh

Mon 12/1

12:05-17:00

1 stop4h 55m

£127

LondonSouthampton

STN - SOU

STNSOU

London Stansted

Thu 8/1

18:15-08:45

1 stop14h 30m

Southampton Eastleigh

Mon 12/1

12:05-20:35

1 stop8h 30m

£130

LondonSouthampton

LTN - SOU

LTNSOU

London Luton

Mon 5/1

08:50-15:35

1 stop6h 45m

Southampton Eastleigh

Mon 12/1

12:05-17:00

1 stop4h 55m

£131

LondonSouthampton

LGW - SOU

LGWSOU

London Gatwick

Thu 8/1

06:20-17:20

1 stop11h 00m

Southampton Eastleigh

Mon 12/1

12:05-22:00

1 stop9h 55m

£131

LondonSouthampton

STN - SOU

STNSOU

London Stansted

Mon 5/1

06:30-15:35

1 stop9h 05m

Southampton Eastleigh

Mon 12/1

08:30-19:35

1 stop11h 05m

£131

LondonSouthampton

LGW - SOU

LGWSOU

London Gatwick

Thu 22/1

21:40-08:45

1 stop11h 05m

Southampton Eastleigh

Thu 29/1

17:55-22:10

1 stop4h 15m

£140

LondonSouthampton

LTN - SOU

LTNSOU

London Luton

Thu 22/1

14:10-19:40

1 stop5h 30m

Southampton Eastleigh

Thu 29/1

12:20-21:20

1 stop9h 00m

£147

LondonSouthampton

STN - SOU

STNSOU

London Stansted

Thu 22/1

18:15-08:45

1 stop14h 30m

Southampton Eastleigh

Thu 29/1

17:55-08:35

1 stop14h 40m

£152

LondonSouthampton

LGW - SOU

LGWSOU

London Gatwick

Mon 5/1

14:50-19:40

1 stop4h 50m

Southampton Eastleigh

Mon 12/1

12:05-18:55

2 stops6h 50m

£170

LondonSouthampton

LGW - SOU

LGWSOU

London Gatwick

Thu 8/1

10:25-15:35

1 stop5h 10m

Southampton Eastleigh

Mon 12/1

12:05-18:55

2 stops6h 50m

£170

Flights are sorted by cheapest return flights first.

Deals found on 7/12

Showing 1-10 of 56 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 10 December 2025.

One of the essential ways to save on airfare from London to Portsmouth is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight at midday could potentially save you up to 66% 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 4h 30m. Fly via easyJet, Aer Lingus, 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 Heathrow - Southampton Eastleigh or London City - 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

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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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