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Cheap flights from Portsmouth to London from £124

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 8/9. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — LON
12 Apr — 19 Apr1
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 13 March 2026.

Sat 25/407:50
SOU
-
LTN
1 stop8h 30m
Multiple Airlines
Sat 2/519:30
LTN
-
SOU
1 stop12h 25m
Multiple Airlines
Deal found 11/3£133
Wed 8/412:30
SOU
-
STN
1 stop10h 10m
Multiple Airlines
Wed 15/412:25
STN
-
SOU
2 stops20h 10m
Multiple Airlines
Deal found 11/3£139
Wed 8/412:30
SOU
-
LTN
1 stop10h 20m
Multiple Airlines
Wed 15/413:10
LTN
-
SOU
2 stops19h 25m
Multiple Airlines
Deal found 11/3£146
Wed 8/412:30
SOU
-
LTN
1 stop10h 20m
easyJet
Wed 15/406:10
LTN
-
SOU
1 stop8h 50m
easyJet
Deal found 11/3£153
Mon 23/316:05
SOU
-
STN
1 stop5h 15m
Multiple Airlines
Tue 24/306:30
STN
-
SOU
1 stop5h 25m
Multiple Airlines
Deal found 9/3£158
Fri 10/408:00
SOU
-
LTN
1 stop14h 10m
easyJet
Fri 17/419:05
LTN
-
SOU
1 stop13h 15m
easyJet
Deal found 13/3£159
Sat 4/420:00
SOU
-
LTN
1 stop4h 30m
Multiple Airlines
Wed 8/413:50
LTN
-
SOU
2 stops18h 45m
Multiple Airlines
Deal found 11/3£162
Wed 8/412:30
SOU
-
LGW
1 stop9h 15m
easyJet
Wed 15/421:50
LGW
-
SOU
1 stop10h 45m
easyJet
Deal found 11/3£165
Wed 8/412:30
SOU
-
LGW
1 stop10h 25m
Multiple Airlines
Wed 15/411:45
LGW
-
SOU
2 stops20h 50m
Multiple Airlines
Deal found 11/3£166
Fri 10/408:00
SOU
-
LTN
1 stop14h 10m
Multiple Airlines
Fri 17/417:10
LTN
-
SOU
2 stops15h 10m
Multiple Airlines
Deal found 13/3£171
Mon 23/316:05
SOU
-
LGW
1 stop4h 50m
Multiple Airlines
Tue 24/308:50
LGW
-
SOU
1 stop6h 45m
Multiple Airlines
Deal found 9/3£173
Fri 10/408:00
SOU
-
STN
2 stops14h 25m
Multiple Airlines
Fri 17/422:30
STN
-
SOU
1 stop9h 50m
Multiple Airlines
Deal found 11/3£174

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 13 March 2026.

Round-trip from

£133

One-way from

£124
25/4-2/5
  • 25/4-2/5
  • 2 total stops
  • 20h 55m total
  • Portsmouth to London
Search Deals
Aurigny Air
  • Aurigny Air
  • 8/9
  • 1 total stop
  • 14h 30m 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 13 March 2026.
Use the filters below to find and compare flights from Portsmouth to London that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

SouthamptonLondon

SOU - LTN

SOULTN

Southampton Eastleigh

Sat 25/4

07:50-16:20

1 stop8h 30m

London Luton

Sat 2/5

19:30-07:55

1 stop12h 25m

£133

SouthamptonLondon

SOU - STN

SOUSTN

Southampton Eastleigh

Wed 8/4

12:30-22:40

1 stop10h 10m

London Stansted

Wed 15/4

18:20-08:35

1 stop14h 15m

£142

SouthamptonLondon

SOU - LTN

SOULTN

Southampton Eastleigh

Wed 8/4

12:30-22:50

1 stop10h 20m

London Luton

Wed 15/4

13:10-08:35

2 stops19h 25m

£146

SouthamptonLondon

SOU - STN

SOUSTN

Southampton Eastleigh

Sat 25/4

07:50-23:05

1 stop15h 15m

London Stansted

Sat 2/5

22:00-12:05

1 stop14h 05m

£151
Fastest return journey

SouthamptonLondon

SOU - STN

SOUSTN

Southampton Eastleigh

Mon 23/3

16:05-21:20

1 stop5h 15m

London Stansted

Tue 24/3

06:30-11:55

1 stop5h 25m

£158

SouthamptonLondon

SOU - LTN

SOULTN

Southampton Eastleigh

Sat 4/4

20:00-00:30

1 stop4h 30m

London Luton

Wed 8/4

13:50-08:35

2 stops18h 45m

£162

SouthamptonLondon

SOU - LGW

SOULGW

Southampton Eastleigh

Wed 8/4

12:30-22:55

1 stop10h 25m

London Gatwick

Wed 15/4

11:45-08:35

2 stops20h 50m

£166

SouthamptonLondon

SOU - LTN

SOULTN

Southampton Eastleigh

Fri 10/4

08:00-22:10

1 stop14h 10m

London Luton

Fri 17/4

17:10-08:20

2 stops15h 10m

£171

SouthamptonLondon

SOU - STN

SOUSTN

Southampton Eastleigh

Tue 5/5

13:25-21:20

2 stops7h 55m

London Stansted

Thu 4/6

06:05-11:05

1 stop5h 00m

£174

SouthamptonLondon

SOU - LTN

SOULTN

Southampton Eastleigh

Tue 5/5

13:25-22:05

1 stop8h 40m

London Luton

Thu 4/6

13:40-19:00

1 stop5h 20m

£176

Flights are sorted by cheapest return flights first.

Deals found on 9/3

Showing 1-10 of 38 resultsSorted by cheapest first
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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 13 March 2026.

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 morning tend to be the most expensive. A flight in the evening could potentially save you up to 62% 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 12 March 2026.

Travellers seeking maximum savings on their Portsmouth to London flight should consider departing on Monday mornings when fares are most often at their lowest. Friday mornings 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 12h 05m. Fly via KLM or Aer Lingus 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 Luton.

  • 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
Wembley
Croydon
Luton
Hounslow
Slough
Gatwick
Ilford
Hayes
Brentford
Colchester
Guildford
Watford
Kingston upon Thames
Chelmsford
Eastbourne
Ipswich
Bedford
Romford
Southend-on-Sea

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Portsmouth to London

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 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.

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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.

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