How long is the flight from London Heathrow Airport to Portsmouth?

A quick flight from London Heathrow Airport to Portsmouth can take about 12h. Aer Lingus provides one of the quickest options available for as low as £231. The distance from London Heathrow Airport to Portsmouth is about 53 mi.

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.

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).

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

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

How can I find direct flights from Heathrow to Portsmouth?

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

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

Yes. Cheapflights offers flight deals from Heathrow 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.

£112+ Flights from London Heathrow Airport to Portsmouth

Cheap flight deals from Heathrow to Portsmouth

Round-trip from	£214
One-way from	£112

Aer Lingus
21/1-28/1
3 total stops
25h 25m total
London to Portsmouth

Search Deals

Aer Lingus
10/2
1 total stop
5h 45m total
London to Portsmouth

Search Deals

Find flight deals from Heathrow to Portsmouth

Enter your travel dates to find the best prices.

Cheapest flights from Heathrow to Portsmouth
Explore the most affordable flight options available from Heathrow to Portsmouth. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 January 2026.

Mon 23/209:55LHR - SOU

1 stop9h 25mMultiple Airlines

Mon 2/319:55SOU - LHR

1 stop13h 15mMultiple Airlines

Deal found 9/1£201

Wed 21/120:50LHR - SOU

2 stops16h 45mMultiple Airlines

Wed 28/112:25SOU - LHR

1 stop8h 40mMultiple Airlines

Deal found 11/1£214

Fri 6/209:55LHR - SOU

1 stop9h 25mMultiple Airlines

Fri 13/220:10SOU - LHR

1 stop11h 55mMultiple Airlines

Deal found 9/1£221

Wed 21/120:45LHR - SOU

1 stop12h 00mAer Lingus

Wed 28/112:25SOU - LHR

1 stop8h 40mAer Lingus

Deal found 11/1£231

Wed 10/620:55LHR - SOU

1 stop11h 40mKLM

Mon 29/617:20SOU - LHR

1 stop3h 35mKLM

Deal found 11/1£250

Sun 25/119:45LHR - SOU

1 stop13h 00mAer Lingus

Thu 29/109:30SOU - LHR

1 stop7h 20mAer Lingus

Deal found 10/1£251

Thu 5/220:25LHR - SOU

1 stop11h 15mMultiple Airlines

Mon 9/214:35SOU - LHR

1 stop4h 40mMultiple Airlines

Deal found 9/1£252

Sat 24/109:05LHR - SOU

1 stop6h 10mMultiple Airlines

Sat 31/108:55SOU - LHR

1 stop10h 25mMultiple Airlines

Deal found 9/1£267

Fri 20/307:10LHR - SOU

1 stop10h 20mBritish Airways

Tue 24/312:00SOU - LHR

1 stop8h 25mBritish Airways

Deal found 10/1£280

Sun 11/119:45LHR - SOU

1 stop13h 00mAer Lingus

Sun 18/109:30SOU - LHR

1 stop6h 05mAer Lingus

Deal found 10/1£287

Best flights from Heathrow to Portsmouth
Discover carefully curated flight deals from Heathrow to Portsmouth that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 12 January 2026.

Mon 23/209:55LHR - SOU

1 stop9h 25mMultiple Airlines

Mon 2/319:55SOU - LHR

1 stop13h 15mMultiple Airlines

Deal found 9/1£201

Wed 21/120:45LHR - SOU

1 stop12h 00mAer Lingus

Wed 28/112:25SOU - LHR

1 stop8h 40mAer Lingus

Deal found 11/1£231

Wed 10/620:55LHR - SOU

1 stop11h 40mKLM

Mon 29/617:20SOU - LHR

1 stop3h 35mKLM

Deal found 11/1£250

Fri 20/307:10LHR - SOU

1 stop10h 20mBritish Airways

Tue 24/312:00SOU - LHR

1 stop8h 25mBritish Airways

Deal found 9/1£280

Wed 21/120:50LHR - SOU

2 stops16h 45mMultiple Airlines

Wed 28/112:25SOU - LHR

1 stop8h 40mMultiple Airlines

Deal found 11/1£214

Fri 6/209:55LHR - SOU

1 stop9h 25mMultiple Airlines

Fri 13/220:10SOU - LHR

1 stop11h 55mMultiple Airlines

Deal found 9/1£221

Sun 25/119:45LHR - SOU

1 stop13h 00mAer Lingus

Thu 29/109:30SOU - LHR

1 stop7h 20mAer Lingus

Deal found 10/1£251

Thu 5/220:25LHR - SOU

1 stop11h 15mMultiple Airlines

Mon 9/214:35SOU - LHR

1 stop4h 40mMultiple Airlines

Deal found 9/1£252

Sat 24/109:05LHR - SOU

1 stop6h 10mMultiple Airlines

Sat 31/108:55SOU - LHR

1 stop10h 25mMultiple Airlines

Deal found 9/1£267

Last-minute flights from Heathrow to Portsmouth
Discover last-minute flight deals from Heathrow to Portsmouth. Data last updated 12 January 2026 and is based on user searches.

Sun 11/119:45LHR - SOU

1 stop13h 00mAer Lingus

Sun 18/109:30SOU - LHR

1 stop6h 05mAer Lingus

Deal found 10/1£287

Wed 21/120:50LHR - SOU

2 stops16h 45mMultiple Airlines

Wed 28/112:25SOU - LHR

1 stop8h 40mMultiple Airlines

Deal found 11/1£214

Wed 21/120:45LHR - SOU

1 stop12h 00mAer Lingus

Wed 28/112:25SOU - LHR

1 stop8h 40mAer Lingus

Deal found 11/1£231

Sat 24/109:05LHR - SOU

1 stop6h 10mMultiple Airlines

Sat 31/108:55SOU - LHR

1 stop10h 25mMultiple Airlines

Deal found 9/1£267

Sun 25/119:45LHR - SOU

1 stop13h 00mAer Lingus

Thu 29/109:30SOU - LHR

1 stop7h 20mAer Lingus

Deal found 10/1£251

Thu 5/220:25LHR - SOU

1 stop11h 15mMultiple Airlines

Mon 9/214:35SOU - LHR

1 stop4h 40mMultiple Airlines

Deal found 9/1£252

Fri 6/209:55LHR - SOU

1 stop9h 25mMultiple Airlines

Fri 13/220:10SOU - LHR

1 stop11h 55mMultiple Airlines

Deal found 9/1£221

Sat 7/217:00LHR - SOU

2 stops15h 45mMultiple Airlines

Sat 14/217:15SOU - LHR

2 stops14h 50mMultiple Airlines

Deal found 10/1£292

Mon 23/209:55LHR - SOU

1 stop9h 25mMultiple Airlines

Mon 2/319:55SOU - LHR

1 stop13h 15mMultiple Airlines

Deal found 9/1£201

One-way flights from Heathrow to Portsmouth
Search for one-way flight options from Heathrow to Portsmouth. Find affordable one-way fares based on user searches. Data last updated 12 January 2026.

Tue 10/209:50LHR - SOU

1 stop5h 45mAer Lingus

Deal found 9/1£112

Sat 7/220:45LHR - SOU

1 stop12h 00mAer Lingus

Deal found 10/1£117

Mon 23/209:50LHR - SOU

1 stop5h 45mAer Lingus

Deal found 9/1£120

Fri 24/408:45LHR - SOU

1 stop8h 55mBritish Airways

Deal found 8/1£131

Fri 3/710:25LHR - SOU

1 stop25h 20mMultiple Airlines

Deal found 10/1£131

Mon 23/208:55LHR - SOU

1 stop9h 35mBritish Airways

Deal found 9/1£172

Fri 24/411:55LHR - SOU

2 stops6h 45mMultiple Airlines

Deal found 8/1£302

Cheapflights Fare Finder

Use the filters below to find and compare flights from London Heathrow Airport to Portsmouth that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Mon 23/2

09:55-19:20

1 stop9h 25m

Southampton Eastleigh

Mon 2/3

19:55-09:10

1 stop13h 15m

£201

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Wed 21/1

20:50-13:35

2 stops16h 45m

Southampton Eastleigh

Wed 28/1

12:25-21:05

1 stop8h 40m

£214

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Fri 6/2

09:55-19:20

1 stop9h 25m

Southampton Eastleigh

Fri 13/2

20:10-08:05

1 stop11h 55m

£221

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Wed 21/1

20:45-08:45

1 stop12h 00m

Southampton Eastleigh

Wed 28/1

12:25-21:05

1 stop8h 40m

£231

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Wed 10/6

20:55-08:35

1 stop11h 40m

Southampton Eastleigh

Mon 29/6

17:20-20:55

1 stop3h 35m

£250

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Sun 25/1

19:45-08:45

1 stop13h 00m

Southampton Eastleigh

Thu 29/1

09:30-16:50

1 stop7h 20m

£251

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Thu 5/2

20:25-07:40

1 stop11h 15m

Southampton Eastleigh

Mon 9/2

14:35-19:15

1 stop4h 40m

£252

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Sat 24/1

09:05-15:15

1 stop6h 10m

Southampton Eastleigh

Sat 31/1

08:55-19:20

1 stop10h 25m

£267

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Fri 20/3

07:10-17:30

1 stop10h 20m

Southampton Eastleigh

Tue 24/3

12:00-20:25

1 stop8h 25m

£280

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Tue 10/2

09:50-15:35

1 stop5h 45m

£112

Flights are sorted by cheapest return flights first.

Deals found on 9/1

Showing 1-10 of 16 results

Best time to book a flight from Heathrow to Portsmouth

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

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

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London Heathrow Airport to Portsmouth as you normally would.

Related info for your journey

How long is the flight from London Heathrow Airport to Portsmouth?
A quick flight from London Heathrow Airport to Portsmouth can take about 12h. Aer Lingus provides one of the quickest options available for as low as £231. The distance from London Heathrow Airport to Portsmouth is about 53 mi.
Can I find deals for flights from Heathrow to Portsmouth that include hotel bookings?
Yes. In addition to deals on Heathrow to Portsmouth flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Heathrow to Portsmouth?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Portsmouth.
Can I find deals for business class flights from Heathrow to Portsmouth?
Yes. Cheapflights offers flight deals from Heathrow 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.

See more FAQs

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How does Cheapflights help users find flights from Heathrow to Portsmouth?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Portsmouth from Heathrow today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from Heathrow to Portsmouth?

Cheapflights simply makes it quick and affordable to book flights from Heathrow to Portsmouth by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Heathrow to Portsmouth with no change fees?

Need flexible booking options for your flight to Portsmouth from Heathrow? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Heathrow to Portsmouth become cheaper?

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

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Cheap flights from London Heathrow Airport to Portsmouth from £112

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 10/2. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Heathrow to Portsmouth

Keep the following information in mind while searching for Heathrow to Portsmouth flight deals. Data was last updated 12 January 2026.

Round-trip from

One-way from

Find flight deals from Heathrow to Portsmouth

Cheapest flights from Heathrow to PortsmouthExplore the most affordable flight options available from Heathrow to Portsmouth. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 January 2026.

Explore the most affordable flight options available from Heathrow to Portsmouth. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 January 2026.

Cheapflights Fare Finder

Use the filters below to find and compare flights from London Heathrow Airport to Portsmouth that are best for you.

Best time to book a flight from Heathrow to Portsmouth

Have a flexible travel schedule? Discover the best time to fly to Portsmouth from Heathrow with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from London Heathrow Airport to Portsmouth

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

Find hourly flight availability from Heathrow 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 12 January 2026.

Related info for your journey

Find useful and relevant information for your journey from Heathrow to Portsmouth. 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 London Heathrow Airport to Portsmouth?

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

How can I find direct flights from Heathrow to Portsmouth?

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

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Heathrow to Portsmouth

See prices for flight routes from nearby airports that may be better suited for you.

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How does Cheapflights help users find flights from Heathrow to Portsmouth?

Why should you use Cheapflights to find cheap flight tickets from Heathrow to Portsmouth?

Can Cheapflights find flights from Heathrow to Portsmouth with no change fees?

Can Cheapflights notify me if prices for flights from Heathrow to Portsmouth become cheaper?

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Cheapest flights from Heathrow to Portsmouth
Explore the most affordable flight options available from Heathrow to Portsmouth. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 January 2026.