Find flights
When to book
FAQs

Cheap flights from Portsmouth to London from £97

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 28/9. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — LON
10 Sep — 17 Sep1
1 adult

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 5 September 2025.

Round-trip from

£119

One-way from

£97
easyJet
  • easyJet
  • 7/10-9/10
  • 2 total stops
  • 16h 50m total
  • Portsmouth to London
Search Deals
28/9
  • 28/9
  • 1 total stop
  • 24h 50m total
  • Portsmouth to London
Search Deals

Find flight deals from Portsmouth to London

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 September 2025.

Tue 7/1012:25SOU - LTN
1 stop9h 40measyJet
Thu 9/1007:10LTN - SOU
1 stop7h 10measyJet
Deal found 4/9£119
Wed 1/1020:00SOU - LGW
1 stop13h 20mMultiple Airlines
Wed 8/1020:50LGW - SOU
1 stop11h 50mMultiple Airlines
Deal found 3/9£133
Wed 1/1020:00SOU - STN
1 stop14h 00mMultiple Airlines
Wed 8/1018:35STN - SOU
1 stop14h 05mMultiple Airlines
Deal found 3/9£133
Tue 7/1012:25SOU - STN
1 stop8h 35measyJet
Thu 9/1008:30STN - SOU
1 stop5h 50measyJet
Deal found 4/9£134
Wed 1/1020:00SOU - LTN
1 stop12h 10mMultiple Airlines
Wed 8/1019:20LTN - SOU
1 stop13h 20mMultiple Airlines
Deal found 3/9£139
Tue 7/1012:25SOU - LGW
1 stop11h 00mMultiple Airlines
Thu 9/1020:35LGW - SOU
1 stop12h 05mMultiple Airlines
Deal found 4/9£145
Mon 20/1020:30SOU - LGW
1 stop12h 05mMultiple Airlines
Mon 27/1017:55LGW - SOU
1 stop18h 00mMultiple Airlines
Deal found 5/9£147
Mon 20/1020:00SOU - STN
1 stop14h 50mMultiple Airlines
Mon 27/1006:30STN - SOU
1 stop9h 05mMultiple Airlines
Deal found 5/9£150
Fri 3/1012:30SOU - LTN
1 stop8h 55mMultiple Airlines
Fri 10/1022:15LTN - SOU
1 stop16h 35mMultiple Airlines
Deal found 5/9£150
Mon 20/1020:00SOU - LTN
1 stop13h 00mMultiple Airlines
Mon 27/1006:25LTN - SOU
1 stop12h 55mMultiple Airlines
Deal found 5/9£156
Fri 3/1012:30SOU - LGW
1 stop10h 00mMultiple Airlines
Fri 10/1006:20LGW - SOU
1 stop5h 25mMultiple Airlines
Deal found 5/9£171
Fri 3/1012:30SOU - STN
1 stop10h 30mMultiple Airlines
Fri 10/1022:50STN - SOU
1 stop16h 55mMultiple Airlines
Deal found 5/9£175

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 September 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

Tue 7/10

12:25-22:05

1 stop9h 40m

London Luton

Thu 9/10

07:10-14:20

1 stop7h 10m

£119

SouthamptonLondon

SOU - LGW

SOULGW

Southampton Eastleigh

Wed 1/10

20:00-09:20

1 stop13h 20m

London Gatwick

Wed 8/10

20:50-08:40

1 stop11h 50m

£133

SouthamptonLondon

SOU - STN

SOUSTN

Southampton Eastleigh

Wed 1/10

20:00-10:00

1 stop14h 00m

London Stansted

Wed 8/10

18:35-08:40

1 stop14h 05m

£133

SouthamptonLondon

SOU - STN

SOUSTN

Southampton Eastleigh

Tue 7/10

12:25-21:00

1 stop8h 35m

London Stansted

Thu 9/10

08:30-14:20

1 stop5h 50m

£134

SouthamptonLondon

SOU - LTN

SOULTN

Southampton Eastleigh

Wed 1/10

20:00-08:10

1 stop12h 10m

London Luton

Wed 8/10

19:20-08:40

1 stop13h 20m

£139

SouthamptonLondon

SOU - LGW

SOULGW

Southampton Eastleigh

Tue 7/10

12:25-23:25

1 stop11h 00m

London Gatwick

Thu 9/10

20:35-08:40

1 stop12h 05m

£145

SouthamptonLondon

SOU - LGW

SOULGW

Southampton Eastleigh

Mon 20/10

20:30-08:35

1 stop12h 05m

London Gatwick

Mon 27/10

17:55-11:55

1 stop18h 00m

£147

SouthamptonLondon

SOU - STN

SOUSTN

Southampton Eastleigh

Mon 20/10

20:00-10:50

1 stop14h 50m

London Stansted

Mon 27/10

06:30-15:35

1 stop9h 05m

£150

SouthamptonLondon

SOU - LTN

SOULTN

Southampton Eastleigh

Fri 3/10

12:30-21:25

1 stop8h 55m

London Luton

Fri 10/10

22:15-14:50

1 stop16h 35m

£150

SouthamptonLondon

SOU - LTN

SOULTN

Southampton Eastleigh

Mon 20/10

20:00-09:00

1 stop13h 00m

London Luton

Mon 27/10

06:25-19:20

1 stop12h 55m

£156

Flights are sorted by cheapest return flights first.

Deals found on 5/9

Showing 1-10 of 45 results
1
2
3
...
5

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 September 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Portsmouth to London as you normally would.

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 31 August 2025.

Travellers seeking maximum savings on their Portsmouth to London flight should consider departing on Saturday evenings 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 9h 40m. Fly via easyJet or Aer Lingus to get the fastest option. The distance between Portsmouth and London is about 77 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What are the cheapest airlines to fly from Portsmouth to London one-way?

    £172 is the cheapest one-way deal found within the past few days, from British Airways. You may also be able to find cheap deals on Aurigny Air and Aer Lingus, with prices starting from £182 and £198, respectively.

  • 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 Heathrow and Southampton Eastleigh - London Gatwick.

  • 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.

  • What is the cheapest month to book a flight from Portsmouth to London?

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

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Milton Keynes
Croydon
Hounslow
Gatwick
Slough
Luton
Deal
Wembley
Ilford
Crawley
Hayes
Ipswich
Watford
Folkestone
Chichester
Winchester
Dartford
Eastbourne
Guildford
Bishop's Stortford

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