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Cheap flights from Portsmouth to London from £70

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 2/5. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — LON
30 Apr — 7 May1
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 31 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 28/3£112
Sat 25/407:50
SOU
-
STN
2 stops13h 30m
Multiple Airlines
Sat 2/518:30
STN
-
SOU
1 stop13h 25m
Multiple Airlines
Deal found 28/3£120
Sat 25/407:50
SOU
-
LGW
2 stops11h 05m
Multiple Airlines
Sat 2/518:40
LGW
-
SOU
1 stop13h 15m
Multiple Airlines
Deal found 28/3£126
Mon 11/520:40
SOU
-
LTN
1 stop12h 05m
Multiple Airlines
Mon 18/518:40
LTN
-
SOU
2 stops18h 10m
Multiple Airlines
Deal found 27/3£127
Mon 20/420:40
SOU
-
STN
1 stop10h 40m
Multiple Airlines
Sun 26/408:30
STN
-
SOU
1 stop8h 20m
Multiple Airlines
Deal found 28/3£127
Mon 11/520:40
SOU
-
STN
1 stop10h 40m
Multiple Airlines
Mon 18/520:00
STN
-
SOU
2 stops16h 50m
Multiple Airlines
Deal found 27/3£129
Mon 20/419:20
SOU
-
LTN
1 stop15h 40m
Multiple Airlines
Sun 26/409:00
LTN
-
SOU
1 stop7h 50m
Multiple Airlines
Deal found 28/3£131
Mon 11/520:40
SOU
-
LGW
2 stops16h 15m
Multiple Airlines
Mon 18/508:40
LGW
-
SOU
1 stop8h 10m
Multiple Airlines
Deal found 27/3£131
Thu 23/420:00
SOU
-
STN
1 stop11h 50m
Multiple Airlines
Thu 30/417:00
STN
-
SOU
1 stop14h 25m
Multiple Airlines
Deal found 26/3£132
Sat 11/420:00
SOU
-
LTN
1 stop12h 20m
Multiple Airlines
Wed 15/406:15
LTN
-
SOU
2 stops26h 20m
Multiple Airlines
Deal found 27/3£137
Sat 11/420:00
SOU
-
STN
1 stop11h 50m
Multiple Airlines
Wed 15/418:20
STN
-
SOU
1 stop14h 15m
Multiple Airlines
Deal found 27/3£138
Thu 23/420:00
SOU
-
LTN
1 stop13h 30m
Multiple Airlines
Thu 30/417:30
LTN
-
SOU
1 stop15h 15m
Multiple Airlines
Deal found 26/3£138

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 31 March 2026.

Round-trip from

£112

One-way from

£70
25/4-2/5
  • 25/4-2/5
  • 2 total stops
  • 20h 55m total
  • Portsmouth to London
Search Deals
easyJet
  • easyJet
  • 2/5
  • 1 total stop
  • 8h 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 31 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

£112

SouthamptonLondon

SOU - STN

SOUSTN

Southampton Eastleigh

Sat 25/4

12:15-21:35

1 stop9h 20m

London Stansted

Sat 2/5

18:30-07:55

1 stop13h 25m

£121

SouthamptonLondon

SOU - STN

SOUSTN

Southampton Eastleigh

Mon 11/5

20:40-07:20

1 stop10h 40m

London Stansted

Mon 18/5

06:30-16:50

1 stop10h 20m

£127

SouthamptonLondon

SOU - STN

SOUSTN

Southampton Eastleigh

Mon 20/4

20:40-07:20

1 stop10h 40m

London Stansted

Sun 26/4

08:30-16:50

1 stop8h 20m

£127

SouthamptonLondon

SOU - LTN

SOULTN

Southampton Eastleigh

Mon 11/5

20:40-08:45

1 stop12h 05m

London Luton

Mon 18/5

08:15-16:50

1 stop8h 35m

£129

SouthamptonLondon

SOU - LTN

SOULTN

Southampton Eastleigh

Mon 20/4

19:20-11:00

1 stop15h 40m

London Luton

Sun 26/4

09:00-16:50

1 stop7h 50m

£131

SouthamptonLondon

SOU - STN

SOUSTN

Southampton Eastleigh

Thu 23/4

20:00-07:50

1 stop11h 50m

London Stansted

Thu 30/4

17:00-07:25

1 stop14h 25m

£132

SouthamptonLondon

SOU - LTN

SOULTN

Southampton Eastleigh

Sat 11/4

20:00-08:20

1 stop12h 20m

London Luton

Wed 15/4

06:15-08:35

2 stops26h 20m

£137

SouthamptonLondon

SOU - STN

SOUSTN

Southampton Eastleigh

Sat 11/4

20:00-07:50

1 stop11h 50m

London Stansted

Wed 15/4

18:20-08:35

1 stop14h 15m

£138

SouthamptonLondon

SOU - LTN

SOULTN

Southampton Eastleigh

Thu 23/4

20:00-09:30

1 stop13h 30m

London Luton

Thu 30/4

17:30-08:45

1 stop15h 15m

£138

Flights are sorted by cheapest return flights first.

Deals found on 26/3

Showing 1-10 of 54 resultsSorted by cheapest first
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6

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 31 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 23 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 5h 40m. Fly via easyJet 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 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
Wembley
Croydon
Hounslow
Gatwick
Slough
Ilford
Luton
Hayes
Brentford
Colchester
Guildford
Watford
Kingston upon Thames
Romford
Eastbourne
Bedford
Chelmsford
Ipswich
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.

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.

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