Find flights
When to book
FAQs

Cheap flights from Portsmouth to London from £91

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 1/1. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — LON
4 Jan — 11 Jan1
1 adult
1 adult, Economy, 0 bags

Cheap 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 5 December 2025.

Wed 31/1209:25SOU - LTN
1 stop12h 35mMultiple Airlines
Wed 7/106:50LTN - SOU
1 stop5h 05mMultiple Airlines
Deal found 3/12£166
Wed 31/1216:05SOU - LGW
1 stop5h 00mMultiple Airlines
Wed 7/120:25LGW - SOU
1 stop12h 20mMultiple Airlines
Deal found 3/12£166
Wed 31/1212:25SOU - STN
1 stop8h 10mMultiple Airlines
Wed 7/121:45STN - SOU
1 stop11h 00mMultiple Airlines
Deal found 3/12£169
Wed 31/1216:05SOU - LHR
1 stop5h 00mAer Lingus
Wed 7/120:45LHR - SOU
1 stop12h 00mAer Lingus
Deal found 3/12£280
Wed 31/1208:40SOU - LCY
1 stop10h 55mKLM
Wed 7/120:05LCY - SOU
1 stop12h 20mKLM
Deal found 3/12£304
Mon 8/1208:30SOU - LGW
1 stop8h 15mMultiple Airlines
Mon 8/1219:40LGW - SOU
1 stop11h 50mMultiple Airlines
Deal found 3/12£338
Wed 31/1214:15SOU - LGW
1 stop3h 30mAurigny Air
Wed 7/108:35LGW - SOU
1 stop10h 30mAurigny Air
Deal found 3/12£360
Mon 8/1208:45SOU - LTN
1 stop6h 00mMultiple Airlines
Mon 8/1217:50LTN - SOU
2 stops21h 00mMultiple Airlines
Deal found 3/12£366
Mon 8/1209:30SOU - STN
1 stop8h 50mMultiple Airlines
Mon 8/1221:45STN - SOU
1 stop14h 10mMultiple Airlines
Deal found 3/12£385
Mon 8/1208:00SOU - LGW
1 stop9h 45mAurigny Air
Sat 13/1208:35LGW - SOU
1 stop10h 30mAurigny Air
Deal found 4/12£390
Tue 16/1208:00SOU - LGW
1 stop11h 10mAurigny Air
Tue 23/1219:40LGW - SOU
1 stop11h 50mAurigny Air
Deal found 4/12£417
Wed 31/1216:05SOU - LHR
1 stop5h 00mMultiple Airlines
Wed 7/107:50LHR - SOU
2 stops9h 40mMultiple Airlines
Deal found 3/12£438

Find flight deals from Portsmouth to London

Keep the following information in mind while searching for Portsmouth to London flight deals. Data was last updated 5 December 2025.

Round-trip from

£154

One-way from

£91
easyJet
  • easyJet
  • 5/3-8/3
  • 2 total stops
  • 22h 35m total
  • Portsmouth to London
Search Deals
easyJet
  • easyJet
  • 1/1
  • 1 total stop
  • 4h 15m total
  • Portsmouth to London
Search Deals

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 5 December 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 - LGW

SOULGW

Southampton Eastleigh

Thu 5/3

19:00-08:50

1 stop13h 50m

London Gatwick

Sun 8/3

09:00-17:45

1 stop8h 45m

£154

SouthamptonLondon

SOU - LGW

SOULGW

Southampton Eastleigh

Thu 1/1

17:55-22:10

1 stop4h 15m

London Gatwick

Thu 8/1

21:40-08:45

1 stop11h 05m

£156

SouthamptonLondon

SOU - LTN

SOULTN

Southampton Eastleigh

Thu 5/3

17:55-08:15

1 stop14h 20m

London Luton

Sun 8/3

08:25-17:45

1 stop9h 20m

£157

SouthamptonLondon

SOU - LTN

SOULTN

Southampton Eastleigh

Thu 1/1

17:55-08:15

1 stop14h 20m

London Luton

Thu 8/1

12:30-17:20

1 stop4h 50m

£159

SouthamptonLondon

SOU - LTN

SOULTN

Southampton Eastleigh

Thu 1/1

17:55-08:15

1 stop14h 20m

London Luton

Thu 8/1

14:10-19:40

1 stop5h 30m

£163

SouthamptonLondon

SOU - LTN

SOULTN

Southampton Eastleigh

Wed 31/12

09:25-22:00

1 stop12h 35m

London Luton

Wed 7/1

06:50-11:55

1 stop5h 05m

£166

SouthamptonLondon

SOU - LGW

SOULGW

Southampton Eastleigh

Wed 31/12

16:05-21:05

1 stop5h 00m

London Gatwick

Wed 7/1

20:25-08:45

1 stop12h 20m

£166

SouthamptonLondon

SOU - STN

SOUSTN

Southampton Eastleigh

Thu 1/1

20:10-07:50

1 stop11h 40m

London Stansted

Thu 8/1

18:15-08:45

1 stop14h 30m

£166

SouthamptonLondon

SOU - STN

SOUSTN

Southampton Eastleigh

Wed 31/12

12:25-20:35

1 stop8h 10m

London Stansted

Wed 7/1

21:45-08:45

1 stop11h 00m

£169

SouthamptonLondon

SOU - STN

SOUSTN

Southampton Eastleigh

Thu 5/3

17:55-08:35

1 stop14h 40m

London Stansted

Sun 8/3

20:00-08:45

1 stop12h 45m

£175

Flights are sorted by cheapest return flights first.

Deals found on 4/12

Showing 1-10 of 39 results
1
2
3
4

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 5 December 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 36% 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 29 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. Thursday evenings 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 5h. Fly via easyJet, Aer Lingus, or KLM 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 City, Southampton Eastleigh - London Gatwick 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
Hounslow
Slough
Gatwick
Luton
Ilford
Wembley
Colchester
Brentford
Watford
Hayes
Crawley
Deal
Winchester
Romford
Bedford
Chichester
Guildford
Ipswich

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Portsmouth to London

See prices for flight routes from nearby airports that may be better suited for you.
Gatwick to Edinburgh flights
Luton to Edinburgh flights
Stansted to Edinburgh flights
Heathrow to Edinburgh flights
London City to Edinburgh flights
Edinburgh to Luton flights
Edinburgh to Heathrow flights
Edinburgh to Gatwick flights
Birmingham to Edinburgh flights
Edinburgh to London City flights
Edinburgh to Stansted flights
Southend to Edinburgh flights
Southampton to Edinburgh flights
Bristol to Edinburgh flights
Heathrow to Manchester flights
Manchester to Heathrow flights
Manchester to Gatwick flights
Gatwick to Manchester flights
Heathrow to Newcastle upon Tyne flights
Manchester to Stansted flights
Manchester to Luton flights
Manchester to London City flights
Luton to Manchester flights
Stansted to Manchester flights
Gatwick to Newcastle upon Tyne flights
London City to Manchester flights
Luton to Newcastle upon Tyne flights
Stansted to Newcastle upon Tyne flights
Newcastle upon Tyne to Heathrow flights
Stansted to Newquay flights
Heathrow to Gatwick flights
Heathrow to Newquay flights
Bristol to Newcastle upon Tyne flights
London City to Newcastle upon Tyne flights
Luton to Newquay flights
Gatwick to Newquay flights
Southampton to Newcastle upon Tyne flights
Edinburgh to Southampton flights
Newcastle upon Tyne to London City flights
Manchester to Newquay flights
Newcastle upon Tyne to Luton flights
Newcastle upon Tyne to Gatwick flights
Newcastle upon Tyne to Stansted flights
Edinburgh to Birmingham flights
Newcastle upon Tyne to Bristol flights
Birmingham to Gatwick flights
Exeter to Edinburgh flights
Manchester to Edinburgh flights
Newcastle upon Tyne to Southampton flights
Edinburgh to Southend 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 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.

Why should you use Cheapflights to find cheap flight tickets from Portsmouth to London?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Portsmouth to London.

Can Cheapflights find flights from Portsmouth to London with no change fees?

Yes! Cheapflights helps users easily find flights from Portsmouth to London with no change fees.

Can Cheapflights notify me if prices for flights from Portsmouth to London become cheaper?

Of course! You can now track prices for flights from Portsmouth to London and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.