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Cheap flights from Portsmouth to London from £44

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 14/9. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — LON
11 Sep — 18 Sep1
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 12 August 2026.

Mon 7/919:20 -
1 stop12h 10m
Tue 22/919:20 -
1 stop14h 55m
Deal found 7/8£107
Wed 16/910:45 -
1 stop11h 55m
Wed 23/918:20 -
1 stop14h 15m
Deal found 11/8£108
Thu 1/1008:55 -
1 stop13h 15m
Thu 8/1017:30 -
1 stop15h 15m
Deal found 11/8£119
Wed 16/910:45 -
1 stop7h 45m
Wed 23/919:20 -
1 stop13h 15m
Deal found 8/8£124
Mon 7/919:20 -
1 stop15h 40m
Tue 22/919:50 -
2 stops14h 25m
Deal found 7/8£125
Wed 16/910:45 -
1 stop12h 05m
Wed 23/916:05 -
1 stop16h 30m
Deal found 11/8£126
Tue 8/917:20 -
1 stop6h 00m
Tue 15/919:20 -
1 stop14h 55m
Deal found 11/8£128
Thu 1/1011:40 -
2 stops20h 10m
Thu 8/1021:55 -
1 stop10h 50m
Deal found 11/8£130
Mon 7/919:20 -
1 stop15h 40m
Mon 14/918:40 -
1 stop14h 00m
Deal found 10/8£131
Thu 1/1011:40 -
1 stop11h 10m
Thu 8/1016:40 -
1 stop16h 05m
Deal found 11/8£131
Wed 16/910:45 -
1 stop6h 50m
Wed 23/921:50 -
1 stop10h 45m
Deal found 11/8£133
Mon 7/920:40 -
1 stop11h 55m
Tue 22/918:20 -
2 stops15h 55m
Deal found 7/8£136

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 12 August 2026.

Round-trip from

£107

One-way from

£44
7/9-22/9
  • 7/9-22/9
  • 2 total stops
  • 27h 05m total
  • Portsmouth to London
Search Deals
easyJet
  • easyJet
  • 14/9
  • 1 total stop
  • 12h 05m 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 12 August 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 Southampton Eastleigh - STN London Stansted

SOUSTN

Southampton Eastleigh

Wed 16/9

10:45-22:40

1 stop11h 55m

London Stansted

Wed 23/9

18:20-08:35

1 stop14h 15m

£108

SouthamptonLondon

SOU Southampton Eastleigh - LTN London Luton

SOULTN

Southampton Eastleigh

Wed 16/9

10:45-18:30

1 stop7h 45m

London Luton

Wed 23/9

19:20-08:35

1 stop13h 15m

£124

SouthamptonLondon

SOU Southampton Eastleigh - LTN London Luton

SOULTN

Southampton Eastleigh

Mon 7/9

19:20-11:00

1 stop15h 40m

London Luton

Tue 22/9

19:50-10:15

2 stops14h 25m

£125

SouthamptonLondon

SOU Southampton Eastleigh - STN London Stansted

SOUSTN

Southampton Eastleigh

Mon 7/9

19:20-07:30

1 stop12h 10m

London Stansted

Tue 22/9

22:00-10:15

2 stops12h 15m

£126

SouthamptonLondon

SOU Southampton Eastleigh - LTN London Luton

SOULTN

Southampton Eastleigh

Wed 16/9

10:45-22:50

1 stop12h 05m

London Luton

Wed 23/9

16:05-08:35

1 stop16h 30m

£130

SouthamptonLondon

SOU Southampton Eastleigh - LTN London Luton

SOULTN

Southampton Eastleigh

Mon 7/9

19:20-11:00

1 stop15h 40m

London Luton

Mon 14/9

18:40-08:40

1 stop14h 00m

£131

SouthamptonLondon

SOU Southampton Eastleigh - STN London Stansted

SOUSTN

Southampton Eastleigh

Mon 7/9

20:40-07:20

1 stop10h 40m

London Stansted

Mon 14/9

22:45-08:40

1 stop9h 55m

£135

SouthamptonLondon

SOU Southampton Eastleigh - LGW London Gatwick

SOULGW

Southampton Eastleigh

Wed 16/9

10:45-09:20

2 stops22h 35m

London Gatwick

Wed 23/9

21:50-08:35

1 stop10h 45m

£143

SouthamptonLondon

SOU Southampton Eastleigh - LGW London Gatwick

SOULGW

Southampton Eastleigh

Wed 16/9

10:45-16:20

1 stop5h 35m

London Gatwick

Wed 23/9

21:50-08:35

1 stop10h 45m

£144

SouthamptonLondon

SOU Southampton Eastleigh - LTN London Luton

SOULTN

Southampton Eastleigh

Thu 10/9

08:55-22:10

1 stop13h 15m

London Luton

Thu 17/9

17:30-08:45

1 stop15h 15m

£147

Flights are sorted by cheapest return flights first.

Deals found on 11/8

Showing 1-10 of 57 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 12 August 2026.

One of the essential ways to save on airfare from Portsmouth to London is to remain as flexible as possible. Flights that are at midday tend to be the most expensive. A flight in the evening could potentially save you up to 29% 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 3h 35m. 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
Hounslow
Milton Keynes
Luton
Gatwick
Wembley
Ilford
Slough
Hayes
Croydon
Colchester
Brentford
Eastbourne
Watford
Southend-on-Sea
Enfield
Kingston upon Thames
Southall
Dover
Romford
Borehamwood

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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