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Cheap flights from Portsmouth to London from £148

This is the cheapest retur 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
31 Mar — 7 Apr1
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 26 March 2025.

Round-trip from

£148
2/5-4/5
  • 2/5-4/5
  • 2 total stops
  • 44h 45m 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 26 March 2025.

Fri 2/520:00SOU - LTN
1 stop25h 45mMultiple Airlines
Sun 4/514:10LTN - SOU
1 stop19h 00mMultiple Airlines
Deal found 26/3£148
Fri 16/519:25SOU - LGW
1 stop24h 05mMultiple Airlines
Mon 19/506:15LGW - SOU
1 stop5h 05mMultiple Airlines
Deal found 25/3£153
Fri 16/512:15SOU - STN
1 stop10h 45mMultiple Airlines
Mon 19/518:00STN - SOU
1 stop17h 45mMultiple Airlines
Deal found 25/3£155
Fri 16/512:15SOU - LTN
1 stop10h 55measyJet
Mon 19/519:10LTN - SOU
1 stop16h 35measyJet
Deal found 25/3£158
Wed 23/409:10SOU - LHR
1 stop5h 45mMultiple Airlines
Wed 30/406:25LHR - SOU
1 stop9h 50mMultiple Airlines
Deal found 26/3£185
Wed 2/709:20SOU - LHR
1 stop11h 35mKLM
Sun 10/820:55LHR - SOU
1 stop11h 50mKLM
Deal found 26/3£295
Wed 23/415:35SOU - LGW
1 stop3h 35mAurigny Air
Wed 30/411:55LGW - SOU
1 stop7h 10mAurigny Air
Deal found 25/3£319
Wed 13/808:55SOU - LHR
1 stop4h 05mBritish Airways
Fri 29/807:25LHR - SOU
1 stop4h 35mBritish Airways
Deal found 25/3£330
Wed 23/419:50SOU - LCY
1 stop12h 10mAurigny Air
Wed 30/408:30LCY - SOU
1 stop10h 35mAurigny Air
Deal found 25/3£351
Thu 10/415:05SOU - LCY
2 stops6h 20mMultiple Airlines
Mon 14/406:55LCY - SOU
1 stop8h 00mMultiple Airlines
Deal found 26/3£383
Wed 13/816:30SOU - LCY
1 stop4h 15mBritish Airways
Fri 29/812:25LCY - SOU
1 stop3h 50mBritish Airways
Deal found 25/3£436

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 26 March 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 2/5

20:00-21:45

1 stop25h 45m

London Luton

Sun 4/5

14:10-09:10

1 stop19h 00m

£148

SouthamptonLondon

SOU - LGW

SOULGW

Southampton Eastleigh

Fri 16/5

19:25-19:30

1 stop24h 05m

London Gatwick

Mon 19/5

06:15-11:20

1 stop5h 05m

£153

SouthamptonLondon

SOU - STN

SOUSTN

Southampton Eastleigh

Fri 16/5

12:15-23:00

1 stop10h 45m

London Stansted

Mon 19/5

18:00-11:45

1 stop17h 45m

£155

SouthamptonLondon

SOU - LTN

SOULTN

Southampton Eastleigh

Fri 16/5

12:15-23:10

1 stop10h 55m

London Luton

Mon 19/5

19:10-11:45

1 stop16h 35m

£158

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Wed 23/4

09:10-14:55

1 stop5h 45m

London Heathrow

Wed 30/4

06:25-16:15

1 stop9h 50m

£185

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Wed 2/7

09:20-20:55

1 stop11h 35m

London Heathrow

Sun 10/8

20:55-08:45

1 stop11h 50m

£295

SouthamptonLondon

SOU - LGW

SOULGW

Southampton Eastleigh

Wed 23/4

15:35-19:10

1 stop3h 35m

London Gatwick

Wed 30/4

11:55-19:05

1 stop7h 10m

£319

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Wed 13/8

08:55-13:00

1 stop4h 05m

London Heathrow

Fri 29/8

07:25-12:00

1 stop4h 35m

£330

SouthamptonLondon

SOU - LCY

SOULCY

Southampton Eastleigh

Wed 23/4

19:50-08:00

1 stop12h 10m

London City

Wed 30/4

08:30-19:05

1 stop10h 35m

£351

SouthamptonLondon

SOU - LCY

SOULCY

Southampton Eastleigh

Thu 10/4

15:05-21:25

2 stops6h 20m

London City

Mon 14/4

06:55-14:55

1 stop8h 00m

£383

Flights are sorted by cheapest return flights first.

Deals found on 25/3

Showing 1-10 of 14 results
1
2

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 26 March 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.

Rainfall in London by month

Plan your trip to London by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in London ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London when rainfall is around 40.0 mm.

Temperature in London by month

Plan your trip to London by taking into account the average temperature totals by month.

If weather is an important factor for your trip to London, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

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 26 March 2025.
To help decide which airline to fly from Portsmouth to London, see what other customers have to say about KLM, easyJet and British Airways. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.8
Good
1,319 reviews
Check prices

Comfort

7.7

Overall

7.8

Boarding

7.8

Entertainment

7.1

Food

7.3

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
KLM
7.8
Good
1,319 reviews
KLM
7.8
Good
1,319 reviews
Check prices

Comfort

7.7

Overall

7.8

Boarding

7.8

Entertainment

7.1

Food

7.3

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
easyJet
6.9
Okay
1,792 reviews
KLM
7.8
Good
1,319 reviews
Check prices

Comfort

7.7

Overall

7.8

Boarding

7.8

Entertainment

7.1

Food

7.3

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
British Airways
6.6
Okay
6,712 reviews
KLM
7.8
Good
1,319 reviews
Check prices

Comfort

7.7

Overall

7.8

Boarding

7.8

Entertainment

7.1

Food

7.3

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.

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 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 Portsmouth?

Book flights to Portsmouth if you plan to visit one of these locations
Hounslow
Deal
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Gatwick
Croydon
Luton
Slough
Eastbourne
Wembley
Hayes
Ilford
Crawley
Southend-on-Sea
Winchester
Maidstone
Ipswich
Watford
Southall
Dartford
Folkestone

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Alternative routes for Portsmouth to London

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