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Cheap flights from Portsmouth to London from £82

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 17/4. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — LON
7 Dec — 14 Dec1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Portsmouth to London

Keep the following information in mind while searching for Portsmouth to London flight deals. Data was last updated 7 November 2025.

Round-trip from

£144

One-way from

£82
3/12-10/12
  • 3/12-10/12
  • 3 total stops
  • 33h 55m total
  • Portsmouth to London
Search Deals
easyJet
  • easyJet
  • 17/4
  • 1 total stop
  • 19h 05m total
  • Portsmouth to London
Search Deals

Find flight deals from Portsmouth to London

Enter your travel dates to find the best prices.

Cheapest flights from Portsmouth to London
Explore the most affordable flight options available from Portsmouth to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 7 November 2025.

Wed 3/1208:55SOU - LTN
1 stop13h 20mMultiple Airlines
Wed 10/1217:00LTN - SOU
2 stops20h 35mMultiple Airlines
Deal found 5/11£144
Sat 6/1208:55SOU - LTN
1 stop6h 10mMultiple Airlines
Sat 13/1221:00LTN - SOU
1 stop11h 45mMultiple Airlines
Deal found 6/11£153
Tue 18/1109:20SOU - LGW
1 stop12h 55mMultiple Airlines
Tue 10/208:30LGW - SOU
1 stop6h 20mMultiple Airlines
Deal found 6/11£154
Tue 18/1109:20SOU - STN
1 stop11h 15mMultiple Airlines
Tue 10/221:45STN - SOU
1 stop14h 10mMultiple Airlines
Deal found 6/11£160
Tue 2/1208:55SOU - LTN
1 stop4h 30mMultiple Airlines
Sun 7/1216:35LTN - SOU
1 stop21h 25mMultiple Airlines
Deal found 6/11£165
Thu 20/1116:05SOU - STN
1 stop6h 45mMultiple Airlines
Mon 24/1121:45STN - SOU
1 stop14h 10mMultiple Airlines
Deal found 5/11£172
Thu 4/1216:05SOU - LTN
1 stop7h 00mMultiple Airlines
Thu 11/1207:00LTN - SOU
1 stop6h 35mMultiple Airlines
Deal found 6/11£175
Tue 18/1109:20SOU - LTN
1 stop12h 30mMultiple Airlines
Tue 10/209:00LTN - SOU
1 stop6h 35mMultiple Airlines
Deal found 6/11£179
Thu 4/1216:05SOU - STN
1 stop5h 00mMultiple Airlines
Thu 11/1206:30STN - SOU
1 stop9h 05mMultiple Airlines
Deal found 6/11£180
Tue 2/1209:20SOU - STN
1 stop11h 15measyJet
Sun 7/1221:25STN - SOU
1 stop14h 00measyJet
Deal found 6/11£183
Sat 6/1208:55SOU - LGW
1 stop6h 40mMultiple Airlines
Sat 13/1217:45LGW - SOU
1 stop15h 00mMultiple Airlines
Deal found 6/11£186
Tue 2/1208:55SOU - LGW
1 stop6h 40mMultiple Airlines
Sun 7/1221:05LGW - SOU
1 stop16h 55mMultiple Airlines
Deal found 6/11£187

Cheapflights Fare Finder

 
Customise your flight search to find flights from Portsmouth to London 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 7 November 2025.
Use the filters below to find and compare flights from Portsmouth to London that are best for you.

Fly from

Portsmouth

Fly to

London

Route

Depart

Return

Price

SouthamptonLondon

SOU - LTN

SOULTN

Southampton Eastleigh

Wed 3/12

08:55-22:15

1 stop13h 20m

London Luton

Wed 10/12

17:00-13:35

2 stops20h 35m

£144

SouthamptonLondon

SOU - LTN

SOULTN

Southampton Eastleigh

Sat 6/12

08:55-15:05

1 stop6h 10m

London Luton

Sat 13/12

21:00-08:45

1 stop11h 45m

£153

SouthamptonLondon

SOU - LGW

SOULGW

Southampton Eastleigh

Tue 18/11

09:20-22:15

1 stop12h 55m

London Gatwick

Tue 10/2

08:30-14:50

1 stop6h 20m

£154

SouthamptonLondon

SOU - STN

SOUSTN

Southampton Eastleigh

Tue 18/11

09:20-20:35

1 stop11h 15m

London Stansted

Tue 10/2

21:45-11:55

1 stop14h 10m

£160

SouthamptonLondon

SOU - LTN

SOULTN

Southampton Eastleigh

Tue 2/12

08:55-13:25

1 stop4h 30m

London Luton

Sun 7/12

16:35-14:00

1 stop21h 25m

£165

SouthamptonLondon

SOU - LTN

SOULTN

Southampton Eastleigh

Fri 2/1

17:45-22:00

1 stop4h 15m

London Luton

Mon 5/1

06:25-19:20

1 stop12h 55m

£170

SouthamptonLondon

SOU - STN

SOUSTN

Southampton Eastleigh

Thu 20/11

16:05-22:50

1 stop6h 45m

London Stansted

Mon 24/11

21:45-11:55

1 stop14h 10m

£172

SouthamptonLondon

SOU - LTN

SOULTN

Southampton Eastleigh

Tue 18/11

09:20-21:50

1 stop12h 30m

London Luton

Tue 10/2

09:00-15:35

1 stop6h 35m

£179

SouthamptonLondon

SOU - STN

SOUSTN

Southampton Eastleigh

Thu 4/12

16:05-21:05

1 stop5h 00m

London Stansted

Thu 11/12

06:30-15:35

1 stop9h 05m

£180

SouthamptonLondon

SOU - STN

SOUSTN

Southampton Eastleigh

Fri 2/1

17:45-07:50

2 stops14h 05m

London Stansted

Mon 5/1

21:45-11:55

1 stop14h 10m

£181

Flights are sorted by cheapest return flights first.

Deals found on 6/11

Showing 1-10 of 41 results
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Best time to book a flight from Portsmouth to London

Have a flexible travel schedule? Discover the best time to fly to London from Portsmouth 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 Portsmouth to London

What is the cheapest time of day to fly from P0R to LON?

Find hourly flight availability from Portsmouth to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 7 November 2025.

One of the essential ways to save on airfare from Portsmouth to London is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight in the evening could potentially save you up to 39% on airfare.

What is the cheapest day to fly from Portsmouth to London?

Use this chart to determine the cheapest time to fly return from Portsmouth to London. Price data was last updated on 2 November 2025.

Travellers seeking maximum savings on their Portsmouth to London flight should consider departing on Monday mornings when fares are most often at their lowest. Saturday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Related info for your journey

Find useful and relevant information for your journey from Portsmouth to London. 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 Portsmouth to London?

    There are many flights that can get you from Portsmouth to London in 3h 50m. Fly via easyJet, Aer Lingus, or British Airways to get the fastest option. The distance between Portsmouth and London is about 53 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

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

    The most popular flight routes from Portsmouth to London are Southampton Eastleigh - London Gatwick, Southampton Eastleigh - London City and Southampton Eastleigh - London Heathrow.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Portsmouth to London 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

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Milton Keynes
Croydon
Slough
Gatwick
Hounslow
Luton
Ilford
Wembley
Deal
Hayes
Colchester
Watford
Winchester
Crawley
Brentford
Romford
Chichester
Ipswich
Bedford
Eastbourne

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Alternative routes for Portsmouth to London

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Fly with Cheapflights

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How does Cheapflights help users find flights from Portsmouth to London?

When you search for this flight from Portsmouth to London, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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