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

A quick flight from London Heathrow Airport to Portsmouth can take about 6h 45m. Aer Lingus provides one of the quickest options available for as low as £284. The distance from London Heathrow Airport to Portsmouth is about 53 mi. This flight may include one or multiple stops.

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.

£122+ Flights from London Heathrow Airport to Portsmouth

Cheap flight deals from Heathrow to Portsmouth

Round-trip from	£284
One-way from	£122

Aer Lingus
18/11-22/11
2 total stops
18h 20m total
London to Portsmouth

Search Deals

Aer Lingus
8/12
1 total stop
7h 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 5 November 2025.

Tue 18/1108:50LHR - SOU

1 stop6h 45mAer Lingus

Sat 22/1109:30SOU - LHR

1 stop11h 35mAer Lingus

Deal found 3/11£284

Tue 18/1120:25LHR - SOU

1 stop11h 45mKLM

Sat 22/1117:30SOU - LHR

1 stop14h 10mKLM

Deal found 3/11£299

Fri 19/1208:40LHR - SOU

1 stop8h 20mKLM

Fri 26/1208:40SOU - LHR

1 stop10h 35mKLM

Deal found 3/11£336

Thu 13/1120:25LHR - SOU

1 stop11h 40mKLM

Sat 15/1109:25SOU - LHR

1 stop5h 00mKLM

Deal found 4/11£367

Thu 13/1115:10LHR - SOU

1 stop4h 30mMultiple Airlines

Sat 15/1109:25SOU - LHR

2 stops10h 25mMultiple Airlines

Deal found 4/11£412

Sat 20/1211:15LHR - SOU

1 stop5h 45mKLM

Sat 27/1209:25SOU - LHR

1 stop11h 25mKLM

Deal found 4/11£440

Sun 9/1106:50LHR - SOU

1 stop5h 00mBritish Airways

Wed 26/1114:25SOU - LHR

1 stop5h 05mBritish Airways

Deal found 4/11£457

Tue 18/1108:05LHR - SOU

2 stops6h 00mMultiple Airlines

Sat 22/1109:30SOU - LHR

1 stop7h 05mMultiple Airlines

Deal found 3/11£561

Wed 5/1107:10LHR - SOU

1 stop4h 55mBritish Airways

Thu 6/1116:00SOU - LHR

1 stop4h 45mBritish Airways

Deal found 4/11£877

Sat 20/1206:00LHR - SOU

2 stops8h 45mMultiple Airlines

Sat 27/1215:25SOU - LHR

1 stop6h 00mMultiple Airlines

Deal found 4/11£1,117

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 5 November 2025.

Tue 18/1108:50LHR - SOU

1 stop6h 45mAer Lingus

Sat 22/1109:30SOU - LHR

1 stop11h 35mAer Lingus

Deal found 3/11£284

Fri 27/307:10LHR - SOU

1 stop10h 10mBritish Airways

Tue 31/312:35SOU - LHR

1 stop10h 00mBritish Airways

Deal found 4/11£295

Tue 18/1120:25LHR - SOU

1 stop11h 45mKLM

Sat 22/1117:30SOU - LHR

1 stop14h 10mKLM

Deal found 3/11£299

Tue 18/1108:05LHR - SOU

2 stops6h 00mMultiple Airlines

Sat 22/1109:30SOU - LHR

1 stop7h 05mMultiple Airlines

Deal found 3/11£561

Mon 30/315:00LHR - SOU

1 stop5h 45mBritish Airways

Thu 2/416:45SOU - LHR

1 stop4h 00mBritish Airways

Deal found 4/11£320

Fri 19/1208:40LHR - SOU

1 stop8h 20mKLM

Fri 26/1208:40SOU - LHR

1 stop10h 35mKLM

Deal found 3/11£336

Sat 20/1211:15LHR - SOU

1 stop5h 45mKLM

Sat 27/1209:25SOU - LHR

1 stop11h 25mKLM

Deal found 4/11£440

Sat 20/1206:00LHR - SOU

2 stops8h 45mMultiple Airlines

Sat 27/1215:25SOU - LHR

1 stop6h 00mMultiple Airlines

Deal found 4/11£1,117

Last-minute flights from Heathrow to Portsmouth
Discover last-minute flight deals from Heathrow to Portsmouth. Data last updated 5 November 2025 and is based on user searches.

Wed 5/1107:10LHR - SOU

1 stop4h 55mBritish Airways

Thu 6/1116:00SOU - LHR

1 stop4h 45mBritish Airways

Deal found 4/11£877

Sun 9/1106:50LHR - SOU

1 stop5h 00mBritish Airways

Wed 26/1114:25SOU - LHR

1 stop5h 05mBritish Airways

Deal found 4/11£457

Thu 13/1120:25LHR - SOU

1 stop11h 40mKLM

Sat 15/1109:25SOU - LHR

1 stop5h 00mKLM

Deal found 4/11£367

Thu 13/1115:10LHR - SOU

1 stop4h 30mMultiple Airlines

Sat 15/1109:25SOU - LHR

2 stops10h 25mMultiple Airlines

Deal found 4/11£412

Tue 18/1108:50LHR - SOU

1 stop6h 45mAer Lingus

Sat 22/1109:30SOU - LHR

1 stop11h 35mAer Lingus

Deal found 3/11£284

Tue 18/1120:25LHR - SOU

1 stop11h 45mKLM

Sat 22/1117:30SOU - LHR

1 stop14h 10mKLM

Deal found 3/11£299

Tue 18/1108:05LHR - SOU

2 stops6h 00mMultiple Airlines

Sat 22/1109:30SOU - LHR

1 stop7h 05mMultiple Airlines

Deal found 3/11£561

Fri 19/1208:40LHR - SOU

1 stop8h 20mKLM

Fri 26/1208:40SOU - LHR

1 stop10h 35mKLM

Deal found 3/11£336

Sat 20/1211:15LHR - SOU

1 stop5h 45mKLM

Sat 27/1209:25SOU - LHR

1 stop11h 25mKLM

Deal found 4/11£440

Sat 20/1206:00LHR - SOU

2 stops8h 45mMultiple Airlines

Sat 27/1215:25SOU - LHR

1 stop6h 00mMultiple Airlines

Deal found 4/11£1,117

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

Tue 18/11

08:50-15:35

1 stop6h 45m

Southampton Eastleigh

Sat 22/11

09:30-21:05

1 stop11h 35m

£284

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Fri 27/3

07:10-17:20

1 stop10h 10m

Southampton Eastleigh

Tue 31/3

12:35-22:35

1 stop10h 00m

£295

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Tue 18/11

20:25-08:10

1 stop11h 45m

Southampton Eastleigh

Sat 22/11

17:30-07:40

1 stop14h 10m

£299

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Mon 30/3

15:00-20:45

1 stop5h 45m

Southampton Eastleigh

Thu 2/4

16:45-20:45

1 stop4h 00m

£320

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Fri 19/12

08:40-17:00

1 stop8h 20m

Southampton Eastleigh

Fri 26/12

08:40-19:15

1 stop10h 35m

£336

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Sat 20/12

11:15-17:00

1 stop5h 45m

Southampton Eastleigh

Sat 27/12

09:25-20:50

1 stop11h 25m

£440

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Tue 18/11

08:05-14:05

2 stops6h 00m

Southampton Eastleigh

Sat 22/11

09:30-16:35

1 stop7h 05m

£561

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Sat 20/12

06:00-14:45

2 stops8h 45m

Southampton Eastleigh

Sat 27/12

15:25-21:25

1 stop6h 00m

£1,117

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Mon 8/12

07:50-15:35

1 stop7h 45m

£122

LondonSouthampton

LHR - SOU

LHRSOU

London Heathrow

Thu 18/12

06:50-14:10

1 stop7h 20m

£130

Flights are sorted by cheapest return flights first.

Deals found on 4/11

Showing 1-10 of 11 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 6h 45m. Aer Lingus provides one of the quickest options available for as low as £284. The distance from London Heathrow Airport to Portsmouth is about 53 mi. This flight may include one or multiple stops.
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.

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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 £122

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 8/12. 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 5 November 2025.

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 5 November 2025.

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 5 November 2025.

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 5 November 2025.

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 5 November 2025.