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

For as low as £226, Aer Lingus can have you in London Heathrow Airport from Portsmouth in 5h 25m. Airlines will cover a distance of 53 mi. This flight may include one or multiple stops.

In terms of precipitation, rainfall in London Heathrow Airport 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 Heathrow Airport when rainfall is around 40.0 mm.

If weather is an important factor for your trip to London Heathrow Airport, 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).

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

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

How can I find direct flights from Portsmouth to Heathrow?

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

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

Yes. Cheapflights offers flight deals from Portsmouth to Heathrow by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

£102+ Cheap Flights from Portsmouth to London Heathrow Airport

Cheap flight deals from Portsmouth to Heathrow

Enter your travel dates to find the best prices.

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Cheapest flights from Portsmouth to Heathrow
Explore the most affordable flight options available from Portsmouth to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 19 September 2026.

Mon 28/919:20 -

1 stop13h 50m

Thu 1/1021:10 -

1 stop11h 30m

Deal found 14/9£194

Thu 15/1009:20 -

1 stop5h 40m

Thu 22/1014:20 -

1 stop5h 10m

Deal found 17/9£213

Mon 12/1020:00 -

1 stop12h 05m

Mon 19/1009:55 -

1 stop8h 55m

Deal found 14/9£220

Thu 1/1020:00 -

1 stop12h 05m

Mon 5/1020:10 -

1 stop12h 30m

Deal found 16/9£223

Thu 29/1012:25 -

1 stop5h 25m

Thu 5/1114:15 -

1 stop5h 15m

Deal found 13/9£226

Tue 29/909:15 -

1 stop4h 40m

Sat 3/1015:00 -

1 stop3h 55m

Deal found 14/9£229

Fri 16/1020:00 -

1 stop12h 05m

Thu 22/1015:10 -

1 stop4h 20m

Deal found 17/9£233

Sun 1/1120:00 -

1 stop12h 05m

Sat 7/1120:45 -

1 stop12h 00m

Deal found 17/9£239

Tue 20/1020:00 -

1 stop13h 05m

Fri 23/1014:20 -

1 stop5h 10m

Deal found 15/9£242

Sun 1/1109:30 -

1 stop9h 45m

Sat 7/1111:15 -

1 stop5h 35m

Deal found 18/9£246

Find flight deals from Portsmouth to Heathrow

Round-trip from	£194
One-way from	£102

Aer Lingus
28/9-1/10
2 total stops
25h 20m total
Portsmouth to London

Search Deals

Aer Lingus
5/10-31/12
1 total stop
17h 55m total
Portsmouth to London

Search Deals

Cheapflights Fare Finder

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

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Route

Depart

Return

Price

Cheapest return flight

SouthamptonLondon

SOU Southampton Eastleigh - LHR London Heathrow

SOULHR

Southampton Eastleigh

Mon 5/10

20:00-13:55

1 stop17h 55m

London Heathrow

Wed 31/12

00:00-00:00

Nonstop0h 00m

£102

SouthamptonLondon

SOU Southampton Eastleigh - LHR London Heathrow

SOULHR

Southampton Eastleigh

Mon 15/3

19:25-09:10

1 stop13h 45m

London Heathrow

Wed 31/12

00:00-00:00

Nonstop0h 00m

£111

SouthamptonLondon

SOU Southampton Eastleigh - LHR London Heathrow

SOULHR

Southampton Eastleigh

Fri 15/1

20:00-08:05

1 stop12h 05m

London Heathrow

Wed 31/12

00:00-00:00

Nonstop0h 00m

£114

SouthamptonLondon

SOU Southampton Eastleigh - LHR London Heathrow

SOULHR

Southampton Eastleigh

Thu 31/12

12:25-19:50

1 stop7h 25m

London Heathrow

Wed 31/12

00:00-00:00

Nonstop0h 00m

£141

SouthamptonLondon

SOU Southampton Eastleigh - LHR London Heathrow

SOULHR

Southampton Eastleigh

Thu 31/12

09:20-20:05

2 stops10h 45m

London Heathrow

Wed 31/12

00:00-00:00

Nonstop0h 00m

£191

SouthamptonLondon

SOU Southampton Eastleigh - LHR London Heathrow

SOULHR

Southampton Eastleigh

Mon 28/9

19:20-09:10

1 stop13h 50m

London Heathrow

Thu 1/10

21:10-08:40

1 stop11h 30m

£194

Fastest return journey

SouthamptonLondon

SOU Southampton Eastleigh - LHR London Heathrow

SOULHR

Southampton Eastleigh

Wed 23/9

14:25-21:50

1 stop7h 25m

London Heathrow

Wed 31/12

00:00-00:00

Nonstop0h 00m

£211

SouthamptonLondon

SOU Southampton Eastleigh - LHR London Heathrow

SOULHR

Southampton Eastleigh

Sat 26/9

16:45-07:55

1 stop15h 10m

London Heathrow

Wed 31/12

00:00-00:00

Nonstop0h 00m

£220

SouthamptonLondon

SOU Southampton Eastleigh - LHR London Heathrow

SOULHR

Southampton Eastleigh

Mon 12/10

20:00-08:05

1 stop12h 05m

London Heathrow

Mon 19/10

09:55-18:50

1 stop8h 55m

£220

SouthamptonLondon

SOU Southampton Eastleigh - LHR London Heathrow

SOULHR

Southampton Eastleigh

Thu 29/10

12:25-17:50

1 stop5h 25m

London Heathrow

Thu 5/11

14:15-19:30

1 stop5h 15m

£226

Flights are sorted by cheapest return flights first.

Deals found on 14/9

Showing 1-10 of 15 resultsSorted by cheapest first

Best time to book a flight from Portsmouth to Heathrow

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

SOU-LHR

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 Heathrow Airport

P0R-LHR

SOU-LHR

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

When flying from Portsmouth to London Heathrow Airport, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 34% versus a flight at midday.

What is the cheapest day to fly from Portsmouth to London Heathrow Airport?

Travellers seeking maximum savings on their Portsmouth to London Heathrow Airport flight should consider departing on Monday mornings when fares are most often at their lowest. Friday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Related info for your journey

How long is the flight from Portsmouth to London Heathrow Airport?
For as low as £226, Aer Lingus can have you in London Heathrow Airport from Portsmouth in 5h 25m. Airlines will cover a distance of 53 mi. This flight may include one or multiple stops.
Can I find deals for flights from Portsmouth to Heathrow that include hotel bookings?
Yes. In addition to deals on Portsmouth to Heathrow flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Portsmouth to Heathrow?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portsmouth to Heathrow.
Can I find deals for business class flights from Portsmouth to Heathrow?
Yes. Cheapflights offers flight deals from Portsmouth to Heathrow 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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Cheap flights from Portsmouth to London Heathrow Airport from £102

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/10. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Portsmouth to Heathrow

Cheapest flights from Portsmouth to HeathrowExplore the most affordable flight options available from Portsmouth to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 19 September 2026.

Explore the most affordable flight options available from Portsmouth to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 19 September 2026.

Best flights from Portsmouth to HeathrowDiscover carefully curated flight deals from Portsmouth to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 19 September 2026.

Discover carefully curated flight deals from Portsmouth to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 19 September 2026.

Last-minute flights from Portsmouth to HeathrowDiscover last-minute flight deals from Portsmouth to Heathrow. Data last updated 19 September 2026 and is based on user searches.

Discover last-minute flight deals from Portsmouth to Heathrow. Data last updated 19 September 2026 and is based on user searches.

One-way flights from Portsmouth to HeathrowSearch for one-way flight options from Portsmouth to Heathrow. Find affordable one-way fares based on user searches. Data last updated 19 September 2026.

Search for one-way flight options from Portsmouth to Heathrow. Find affordable one-way fares based on user searches. Data last updated 19 September 2026.

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

Best time to book a flight from Portsmouth to Heathrow

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

Cheapflights Insights

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

Find hourly flight availability from Portsmouth to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 19 September 2026.

When flying from Portsmouth to London Heathrow Airport, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 34% versus a flight at midday.

What is the cheapest day to fly from Portsmouth to London Heathrow Airport?

Use this chart to determine the cheapest time to fly return from Portsmouth to Heathrow. Price data was last updated on 23 March 2026.

Travellers seeking maximum savings on their Portsmouth to London Heathrow Airport flight should consider departing on Monday mornings when fares are most often at their lowest. Friday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Related info for your journey

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

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

How can I find direct flights from Portsmouth to Heathrow?

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

Travelling to a place near London Heathrow Airport?

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Complete your trip

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

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Cheapest flights from Portsmouth to Heathrow
Explore the most affordable flight options available from Portsmouth to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 19 September 2026.

Best flights from Portsmouth to Heathrow
Discover carefully curated flight deals from Portsmouth to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 19 September 2026.

Last-minute flights from Portsmouth to Heathrow
Discover last-minute flight deals from Portsmouth to Heathrow. Data last updated 19 September 2026 and is based on user searches.

One-way flights from Portsmouth to Heathrow
Search for one-way flight options from Portsmouth to Heathrow. Find affordable one-way fares based on user searches. Data last updated 19 September 2026.