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Cheap flights from Portsmouth to London from £83

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 5/12. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — LON
23 Jul — 30 Jul1
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 18 July 2025.

Round-trip from

£159

One-way from

£83
easyJet
  • easyJet
  • 5/9-7/9
  • 2 total stops
  • 23h 15m total
  • Portsmouth to London
Search Deals
5/12
  • 5/12
  • 1 total stop
  • 4h 35m 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 18 July 2025.

Fri 5/912:30SOU - LTN
1 stop10h 40mMultiple Airlines
Sun 7/919:00LTN - SOU
1 stop12h 35mMultiple Airlines
Deal found 16/7£159
Sun 31/821:30SOU - LGW
1 stop10h 50mMultiple Airlines
Sun 7/919:40LGW - SOU
1 stop11h 55mMultiple Airlines
Deal found 17/7£159
Sat 30/808:25SOU - STN
2 stops12h 55mMultiple Airlines
Sat 6/921:20STN - SOU
1 stop10h 55mMultiple Airlines
Deal found 16/7£161
Sun 31/821:30SOU - LTN
1 stop10h 50measyJet
Sun 7/907:10LTN - SOU
1 stop8h 55measyJet
Deal found 17/7£181
Wed 13/809:20SOU - LHR
1 stop8h 15mKLM
Wed 20/820:55LHR - SOU
1 stop11h 50mKLM
Deal found 16/7£227
Wed 6/810:50SOU - LHR
1 stop10h 05mMultiple Airlines
Mon 11/806:30LHR - SOU
1 stop4h 05mMultiple Airlines
Deal found 18/7£289
Sun 31/809:20SOU - LCY
1 stop8h 00mKLM
Sun 7/920:45LCY - SOU
1 stop12h 00mKLM
Deal found 17/7£313
Fri 8/820:00SOU - LHR
1 stop12h 00mAer Lingus
Wed 13/815:10LHR - SOU
1 stop4h 20mAer Lingus
Deal found 18/7£317
Tue 5/819:50SOU - LCY
1 stop12h 10mAurigny Air
Tue 12/819:20LCY - SOU
1 stop12h 10mAurigny Air
Deal found 16/7£341
Fri 5/916:35SOU - LHR
1 stop4h 50mBritish Airways
Sun 7/919:20LHR - SOU
1 stop13h 05mBritish Airways
Deal found 16/7£342
Sat 30/808:00SOU - LGW
1 stop11h 10mAurigny Air
Sat 6/919:40LGW - SOU
1 stop13h 50mAurigny Air
Deal found 16/7£347
Wed 30/709:20SOU - SEN
1 stop10h 20mMultiple Airlines
Sun 3/817:30SEN - SOU
1 stop26h 25mMultiple Airlines
Deal found 17/7£518

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 18 July 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

Fri 5/9

12:30-23:10

1 stop10h 40m

London Luton

Sun 7/9

19:00-07:35

1 stop12h 35m

£159

SouthamptonLondon

SOU - LGW

SOULGW

Southampton Eastleigh

Sun 31/8

21:30-08:20

1 stop10h 50m

London Gatwick

Sun 7/9

19:40-07:35

1 stop11h 55m

£159

SouthamptonLondon

SOU - STN

SOUSTN

Southampton Eastleigh

Sat 30/8

08:25-21:20

2 stops12h 55m

London Stansted

Sat 6/9

21:20-08:15

1 stop10h 55m

£161

SouthamptonLondon

SOU - LTN

SOULTN

Southampton Eastleigh

Sun 31/8

21:30-08:20

1 stop10h 50m

London Luton

Sun 7/9

07:10-16:05

1 stop8h 55m

£181

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Wed 13/8

09:20-17:35

1 stop8h 15m

London Heathrow

Wed 20/8

20:55-08:45

1 stop11h 50m

£227

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Wed 6/8

10:50-20:55

1 stop10h 05m

London Heathrow

Mon 11/8

06:30-10:35

1 stop4h 05m

£289

SouthamptonLondon

SOU - LCY

SOULCY

Southampton Eastleigh

Sun 31/8

09:20-17:20

1 stop8h 00m

London City

Sun 7/9

20:45-08:45

1 stop12h 00m

£313

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Fri 8/8

20:00-08:00

1 stop12h 00m

London Heathrow

Wed 13/8

15:10-19:30

1 stop4h 20m

£317

SouthamptonLondon

SOU - LCY

SOULCY

Southampton Eastleigh

Tue 5/8

19:50-08:00

1 stop12h 10m

London City

Tue 12/8

19:20-07:30

1 stop12h 10m

£341

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Fri 5/9

16:35-21:25

1 stop4h 50m

London Heathrow

Sun 7/9

19:20-08:25

1 stop13h 05m

£342

Flights are sorted by cheapest return flights first.

Deals found on 16/7

Showing 1-10 of 30 results
1
2
3

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 18 July 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 13 July 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.

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to London. Reviews last updated 18 July 2025.
Read through reviews of airlines operating flights from Portsmouth to London, such as KLM, Aer Lingus, andeasyJet. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.8
Good
1,374 reviews
Check prices

Food

7.3

Crew

8.4

Entertainment

7.1

Comfort

7.7

Overall

7.8

Boarding

7.8

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
KLM
7.8
Good
1,374 reviews
KLM
7.8
Good
1,374 reviews
Check prices

Food

7.3

Crew

8.4

Entertainment

7.1

Comfort

7.7

Overall

7.8

Boarding

7.8

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
Aer Lingus
7.1
Good
1,170 reviews
KLM
7.8
Good
1,374 reviews
Check prices

Food

7.3

Crew

8.4

Entertainment

7.1

Comfort

7.7

Overall

7.8

Boarding

7.8

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
easyJet
6.9
Okay
1,820 reviews
KLM
7.8
Good
1,374 reviews
Check prices

Food

7.3

Crew

8.4

Entertainment

7.1

Comfort

7.7

Overall

7.8

Boarding

7.8

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
British Airways
6.6
Okay
7,151 reviews
KLM
7.8
Good
1,374 reviews
Check prices

Food

7.3

Crew

8.4

Entertainment

7.1

Comfort

7.7

Overall

7.8

Boarding

7.8

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

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.

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

    £84 is the cheapest one-way deal found within the past few days, from easyJet. You may also be able to find cheap deals on British Airways and Aurigny Air, with prices starting from £150 and £163, 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
Deal
Gatwick
Slough
Luton
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Crawley
Eastbourne
Ilford
Hayes
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Watford
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Maidstone
Guildford
Chichester

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