Cheap flights from Portsmouth to London from £94

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 14/10. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — LON
15 Oct — 22 Oct1
1 adult
1 adult, Economy

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 15 September 2025.

Round-trip from

£128

One-way from

£94
13/10-20/10
  • 13/10-20/10
  • 3 total stops
  • 26h 10m total
  • Portsmouth to London
Aer Lingus
  • Aer Lingus
  • 14/10
  • 1 total stop
  • 12h 00m total
  • Portsmouth to London

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 15 September 2025.

Mon 13/1020:30SOU - STN
2 stops15h 55mMultiple Airlines
Mon 20/1022:00STN - SOU
1 stop10h 15mMultiple Airlines
Deal found 15/9£128
Thu 16/1015:05SOU - LTN
1 stop7h 05measyJet
Wed 22/1019:20LTN - SOU
1 stop17h 25measyJet
Deal found 15/9£129
Sun 12/1013:10SOU - LGW
1 stop20h 35mMultiple Airlines
Sun 19/1019:40LGW - SOU
1 stop12h 00mMultiple Airlines
Deal found 14/9£143
Thu 16/1008:55SOU - LGW
1 stop13h 50mMultiple Airlines
Wed 22/1021:50LGW - SOU
1 stop14h 55mMultiple Airlines
Deal found 15/9£144
Wed 29/1016:05SOU - STN
1 stop5h 15mMultiple Airlines
Wed 5/1108:30STN - SOU
1 stop7h 05mMultiple Airlines
Deal found 14/9£147
Wed 29/1020:10SOU - LTN
1 stop12h 25mMultiple Airlines
Wed 5/1106:50LTN - SOU
1 stop5h 05mMultiple Airlines
Deal found 14/9£149
Thu 30/1020:10SOU - STN
1 stop11h 40mMultiple Airlines
Thu 6/1108:30STN - SOU
1 stop7h 05mMultiple Airlines
Deal found 15/9£150
Sat 11/1015:20SOU - STN
1 stop5h 35mMultiple Airlines
Sun 12/1006:45STN - SOU
1 stop4h 40mMultiple Airlines
Deal found 12/9£153
Sat 11/1008:55SOU - LGW
1 stop6h 55mMultiple Airlines
Sat 18/1020:20LGW - SOU
2 stops35h 20mMultiple Airlines
Deal found 13/9£154
Thu 30/1009:30SOU - LTN
1 stop7h 35mMultiple Airlines
Thu 6/1114:10LTN - SOU
1 stop5h 30mMultiple Airlines
Deal found 15/9£156
Sat 11/1018:55SOU - LGW
1 stop14h 15mMultiple Airlines
Sun 12/1019:40LGW - SOU
1 stop11h 55mMultiple Airlines
Deal found 12/9£160
Mon 13/1008:05SOU - LHR
1 stop6h 10mMultiple Airlines
Mon 20/1020:10LHR - SOU
1 stop12h 05mMultiple Airlines
Deal found 15/9£162

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 15 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

Thu 16/10

15:05-22:10

1 stop7h 05m

London Luton

Wed 22/10

19:20-12:45

1 stop17h 25m

£129

SouthamptonLondon

SOU - LGW

SOULGW

Southampton Eastleigh

Sun 12/10

13:10-09:45

1 stop20h 35m

London Gatwick

Sun 19/10

19:40-07:40

1 stop12h 00m

£143

SouthamptonLondon

SOU - LGW

SOULGW

Southampton Eastleigh

Thu 16/10

08:55-22:45

1 stop13h 50m

London Gatwick

Wed 22/10

21:50-12:45

1 stop14h 55m

£144

SouthamptonLondon

SOU - STN

SOUSTN

Southampton Eastleigh

Mon 13/10

20:30-15:45

1 stop19h 15m

London Stansted

Mon 20/10

22:00-08:15

1 stop10h 15m

£145

SouthamptonLondon

SOU - STN

SOUSTN

Southampton Eastleigh

Wed 29/10

16:05-21:20

1 stop5h 15m

London Stansted

Wed 5/11

08:30-15:35

1 stop7h 05m

£147

SouthamptonLondon

SOU - LTN

SOULTN

Southampton Eastleigh

Wed 29/10

20:10-08:35

1 stop12h 25m

London Luton

Wed 5/11

06:50-11:55

1 stop5h 05m

£149

SouthamptonLondon

SOU - STN

SOUSTN

Southampton Eastleigh

Thu 30/10

20:10-07:50

1 stop11h 40m

London Stansted

Thu 6/11

08:30-15:35

1 stop7h 05m

£150

SouthamptonLondon

SOU - STN

SOUSTN

Southampton Eastleigh

Sat 11/10

15:20-20:55

1 stop5h 35m

London Stansted

Sun 12/10

06:45-11:25

1 stop4h 40m

£153

SouthamptonLondon

SOU - LGW

SOULGW

Southampton Eastleigh

Sat 11/10

08:55-15:50

1 stop6h 55m

London Gatwick

Sat 18/10

20:20-07:40

2 stops35h 20m

£154

SouthamptonLondon

SOU - LTN

SOULTN

Southampton Eastleigh

Thu 30/10

09:30-17:05

1 stop7h 35m

London Luton

Thu 6/11

14:10-19:40

1 stop5h 30m

£156

Flights are sorted by cheapest return flights first.

Deals found on 14/9

Showing 1-10 of 38 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 15 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 14 September 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 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 cheapest airlines to fly from Portsmouth to London one-way?

    £94 is the cheapest one-way deal found within the past few days, from Aer Lingus. You may also be able to find cheap deals on Aurigny Air and British Airways, with prices starting from £169 and £172, respectively.

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

  • 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

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Alternative routes for Portsmouth to London

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