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Cheap flights from London to Portsmouth from £85

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 21/7. Fares are subject to change and may not be available on all flights or dates of travel.
LON — LHR
18 Jun — 25 Jun1
1 adult

Cheap flight deals from London to Portsmouth

Keep the following information in mind while searching for London to Portsmouth flight deals. Data was last updated 13 June 2025.

Round-trip from

£169

One-way from

£85
easyJet
  • easyJet
  • 27/9-8/10
  • 2 total stops
  • 18h 05m total
  • London to Portsmouth
Search Deals
21/7
  • 21/7
  • 1 total stop
  • 10h 40m total
  • London to Portsmouth
Search Deals

Find flight deals from London to Portsmouth

Cheapest flights from London to Portsmouth
Explore the most affordable flight options available from London to Portsmouth. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 13 June 2025.

Sat 27/907:05LTN - SOU
1 stop7h 45measyJet
Wed 8/1009:00SOU - LTN
1 stop10h 20measyJet
Deal found 11/6£169
Sat 27/907:50STN - SOU
1 stop7h 00measyJet
Wed 8/1009:00SOU - STN
1 stop8h 50measyJet
Deal found 11/6£174
Sat 26/716:30STN - SOU
1 stop16h 05mMultiple Airlines
Sat 2/808:05SOU - STN
1 stop26h 05mMultiple Airlines
Deal found 11/6£182
Sat 27/907:30LGW - SOU
1 stop7h 20measyJet
Wed 8/1009:00SOU - LGW
1 stop7h 20measyJet
Deal found 11/6£183
Sat 26/708:40LTN - SOU
1 stop23h 55mMultiple Airlines
Sat 2/808:05SOU - LTN
1 stop24h 05mMultiple Airlines
Deal found 11/6£191
Sun 6/707:40LGW - SOU
1 stop6h 40mMultiple Airlines
Thu 10/716:35SOU - LGW
1 stop5h 00mMultiple Airlines
Deal found 11/6£197
Sun 6/717:30SEN - SOU
1 stop26h 25measyJet
Thu 10/720:50SOU - SEN
1 stop16h 15measyJet
Deal found 11/6£249
Sat 27/911:45LHR - SOU
1 stop5h 45mKLM
Wed 8/1009:20SOU - LHR
1 stop10h 05mKLM
Deal found 11/6£255
Sun 27/720:10LCY - SOU
1 stop12h 35mKLM
Sun 3/809:20SOU - LCY
1 stop9h 15mKLM
Deal found 12/6£258
Thu 10/714:20LHR - SOU
1 stop5h 10mMultiple Airlines
Sat 19/708:25SOU - LHR
1 stop10h 25mMultiple Airlines
Deal found 11/6£298
Mon 29/1212:30LHR - SOU
1 stop3h 45mBritish Airways
Mon 12/111:40SOU - LHR
1 stop4h 20mBritish Airways
Deal found 12/6£319
Thu 24/713:55SEN - SOU
1 stop6h 40mMultiple Airlines
Wed 30/709:20SOU - SEN
1 stop10h 20mMultiple Airlines
Deal found 12/6£331

Cheapflights Fare Finder

Customise your flight search to find flights from London to Portsmouth 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 June 2025.
Use the filters below to find and compare flights from London to Portsmouth that are best for you.

Fly from

London

Fly to

Portsmouth

Route

Depart

Return

Price

LondonSouthampton

LTN - SOU

LTNSOU

London Luton

Sat 27/9

07:05-14:50

1 stop7h 45m

Southampton Eastleigh

Wed 8/10

09:00-19:20

1 stop10h 20m

£169

LondonSouthampton

STN - SOU

STNSOU

London Stansted

Sat 27/9

07:50-14:50

1 stop7h 00m

Southampton Eastleigh

Wed 8/10

09:00-17:50

1 stop8h 50m

£174

LondonSouthampton

STN - SOU

STNSOU

London Stansted

Sat 26/7

16:30-08:35

1 stop16h 05m

Southampton Eastleigh

Sat 2/8

08:05-10:10

1 stop26h 05m

£182

LondonSouthampton

LGW - SOU

LGWSOU

London Gatwick

Sat 27/9

07:30-14:50

1 stop7h 20m

Southampton Eastleigh

Wed 8/10

09:00-16:20

1 stop7h 20m

£183

LondonSouthampton

LTN - SOU

LTNSOU

London Luton

Sat 26/7

08:40-08:35

1 stop23h 55m

Southampton Eastleigh

Sat 2/8

08:05-08:10

1 stop24h 05m

£191

LondonSouthampton

LGW - SOU

LGWSOU

London Gatwick

Sun 6/7

07:40-14:20

1 stop6h 40m

Southampton Eastleigh

Thu 10/7

16:35-21:35

1 stop5h 00m

£197

LondonSouthampton

SEN - SOU

SENSOU

London Southend

Sun 6/7

17:30-19:55

1 stop26h 25m

Southampton Eastleigh

Thu 10/7

20:50-13:05

1 stop16h 15m

£249

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Sat 27/9

11:45-17:30

1 stop5h 45m

Southampton Eastleigh

Wed 8/10

09:20-19:25

1 stop10h 05m

£255

LondonSouthampton

LCY - SOU

LCYSOU

London City

Sun 27/7

20:10-08:45

1 stop12h 35m

Southampton Eastleigh

Sun 3/8

09:20-18:35

1 stop9h 15m

£258

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Thu 10/7

14:20-19:30

1 stop5h 10m

Southampton Eastleigh

Sat 19/7

08:25-18:50

1 stop10h 25m

£298

Flights are sorted by cheapest return flights first.

Deals found on 12/6

Showing 1-10 of 29 results
1
2
3

Best time to book a flight from London to Portsmouth

Have a flexible travel schedule? Discover the best time to fly to Portsmouth from London 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 London to Portsmouth

What is the cheapest time of day to fly from LON to P0R?

Find hourly flight availability from London to Portsmouth. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 13 June 2025.

When flying from London to Portsmouth, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Rainfall in Portsmouth by month

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

In terms of precipitation, rainfall in Portsmouth ranges from 25.0 - 76.0 inches per month. December is typically the wettest month, when rainfall can reach 76.0 mm. July is typically the driest time to visit Portsmouth when rainfall is around 25.0 mm.

Temperature in Portsmouth by month

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

If weather is an important factor for your trip to Portsmouth, 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 18.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 4.0 C).

Reviews of airlines servicing Portsmouth

Get insights into the airlines that provide service to Portsmouth. 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 Portsmouth. Reviews last updated 13 June 2025.
See what other customers who have flown with KLM, Aer Lingus and easyJet from London to Portsmouth have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.8
Good
1,358 reviews
Check prices

Food

7.2

Boarding

7.8

Comfort

7.7

Overall

7.8

Entertainment

7.1

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Allan,Jun 2025

YYZ - AMS

I always enjoy flying KLM. Service is attentive, friendly and professional. The seat, when fully reclined is a little hard; some kind of mattress or topper would be helpful here. The dinner was really not very good …. “Meatless meatballs” tasted quite peculiar. Breakfast which consisted of an egg white omelette in flour tortilla was also rather tasteless.
KLM
7.8
Good
1,358 reviews
KLM
7.8
Good
1,358 reviews
Check prices

Food

7.2

Boarding

7.8

Comfort

7.7

Overall

7.8

Entertainment

7.1

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Allan,Jun 2025

YYZ - AMS

I always enjoy flying KLM. Service is attentive, friendly and professional. The seat, when fully reclined is a little hard; some kind of mattress or topper would be helpful here. The dinner was really not very good …. “Meatless meatballs” tasted quite peculiar. Breakfast which consisted of an egg white omelette in flour tortilla was also rather tasteless.
Aer Lingus
7.1
Good
1,118 reviews
KLM
7.8
Good
1,358 reviews
Check prices

Food

7.2

Boarding

7.8

Comfort

7.7

Overall

7.8

Entertainment

7.1

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Allan,Jun 2025

YYZ - AMS

I always enjoy flying KLM. Service is attentive, friendly and professional. The seat, when fully reclined is a little hard; some kind of mattress or topper would be helpful here. The dinner was really not very good …. “Meatless meatballs” tasted quite peculiar. Breakfast which consisted of an egg white omelette in flour tortilla was also rather tasteless.
easyJet
6.9
Okay
1,812 reviews
KLM
7.8
Good
1,358 reviews
Check prices

Food

7.2

Boarding

7.8

Comfort

7.7

Overall

7.8

Entertainment

7.1

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Allan,Jun 2025

YYZ - AMS

I always enjoy flying KLM. Service is attentive, friendly and professional. The seat, when fully reclined is a little hard; some kind of mattress or topper would be helpful here. The dinner was really not very good …. “Meatless meatballs” tasted quite peculiar. Breakfast which consisted of an egg white omelette in flour tortilla was also rather tasteless.
British Airways
6.6
Okay
7,011 reviews
KLM
7.8
Good
1,358 reviews
Check prices

Food

7.2

Boarding

7.8

Comfort

7.7

Overall

7.8

Entertainment

7.1

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Allan,Jun 2025

YYZ - AMS

I always enjoy flying KLM. Service is attentive, friendly and professional. The seat, when fully reclined is a little hard; some kind of mattress or topper would be helpful here. The dinner was really not very good …. “Meatless meatballs” tasted quite peculiar. Breakfast which consisted of an egg white omelette in flour tortilla was also rather tasteless.

Related info for your journey

Find useful and relevant information for your journey from London to Portsmouth. 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 London to Portsmouth one-way?

    The cheapet airlines for a one-way flight from London to Portsmouth are easyJet (£109), British Airways (£164), and KLM (£200).

  • What are the most popular routes from London to Portsmouth?

    While some choose either London Gatwick - Southampton Eastleigh or London Luton - Southampton Eastleigh, London Heathrow - Southampton Eastleigh is the most popular route from London to Portsmouth.

  • Can I find deals for flights from London to Portsmouth that include hotel bookings?

    Yes. In addition to deals on London to Portsmouth flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from London to Portsmouth?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to Portsmouth.

  • Can I find deals for business class flights from London to Portsmouth?

    Yes. Cheapflights offers flight deals from London to Portsmouth 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 London to Portsmouth?

    Currently, January is the cheapest month in which you can book a flight from London to Portsmouth (average of £112). Flying from London to Portsmouth 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

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Alternative routes for London to Portsmouth

See prices for flight routes from nearby airports that may be better suited for you.
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Certainly. Search results for flights to Portsmouth from London shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Portsmouth from London today and book when prices fit your budget.

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