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

For as low as £200, Aer Lingus can have you in London Heathrow Airport from Portsmouth in 5h 45m. Airlines will cover a distance of 53 mi.

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.

£92+ 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 6 September 2026.

Tue 20/1009:15 -

1 stop5h 45m

Tue 27/1020:45 -

1 stop12h 05m

Deal found 5/9£200

Wed 30/920:00 -

1 stop13h 05m

Wed 7/1014:20 -

1 stop5h 10m

Deal found 2/9£208

Tue 29/909:15 -

1 stop4h 40m

Tue 6/1021:10 -

1 stop10h 55m

Deal found 1/9£210

Thu 1/1020:00 -

1 stop12h 05m

Wed 7/1015:10 -

1 stop4h 20m

Deal found 2/9£217

Wed 30/909:20 -

1 stop4h 35m

Wed 7/1018:45 -

2 stops13h 50m

Deal found 2/9£225

Sun 1/1112:25 -

1 stop8h 40m

Sat 7/1120:45 -

1 stop12h 00m

Deal found 5/9£234

Sat 3/1009:20 -

1 stop8h 00m

Sat 10/1008:50 -

1 stop10h 40m

Deal found 5/9£241

Tue 29/913:25 -

2 stops6h 55m

Tue 6/1014:20 -

1 stop5h 10m

Deal found 1/9£252

Sat 3/1008:55 -

1 stop11h 25m

Sat 10/1007:30 -

1 stop8h 45m

Deal found 5/9£309

Fri 18/1209:20 -

1 stop7h 30m

Sat 19/1220:50 -

2 stops16h 40m

Deal found 4/9£313

Find flight deals from Portsmouth to Heathrow

Round-trip from	£200
One-way from	£92

Aer Lingus
20/10-27/10
2 total stops
17h 50m total
Portsmouth to London

Search Deals

12/10-31/12
2 total stops
19h 25m 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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Price

Cheapest return flight

SouthamptonLondon

SOU Southampton Eastleigh - LHR London Heathrow

SOULHR

Southampton Eastleigh

Mon 12/10

19:20-14:45

2 stops19h 25m

London Heathrow

Wed 31/12

00:00-00:00

Nonstop0h 00m

£92

SouthamptonLondon

SOU Southampton Eastleigh - LHR London Heathrow

SOULHR

Southampton Eastleigh

Fri 2/10

20:00-08:05

1 stop12h 05m

London Heathrow

Wed 31/12

00:00-00:00

Nonstop0h 00m

£107

SouthamptonLondon

SOU Southampton Eastleigh - LHR London Heathrow

SOULHR

Southampton Eastleigh

Fri 16/10

06:50-21:25

1 stop14h 35m

London Heathrow

Wed 31/12

00:00-00:00

Nonstop0h 00m

£178

SouthamptonLondon

SOU Southampton Eastleigh - LHR London Heathrow

SOULHR

Southampton Eastleigh

Sat 17/10

07:50-21:40

1 stop13h 50m

London Heathrow

Wed 31/12

00:00-00:00

Nonstop0h 00m

£178

SouthamptonLondon

SOU Southampton Eastleigh - LHR London Heathrow

SOULHR

Southampton Eastleigh

Thu 15/10

12:35-17:55

1 stop5h 20m

London Heathrow

Wed 31/12

00:00-00:00

Nonstop0h 00m

£183

SouthamptonLondon

SOU Southampton Eastleigh - LHR London Heathrow

SOULHR

Southampton Eastleigh

Tue 20/10

09:15-15:00

1 stop5h 45m

London Heathrow

Tue 27/10

20:45-08:50

1 stop12h 05m

£200

SouthamptonLondon

SOU Southampton Eastleigh - LHR London Heathrow

SOULHR

Southampton Eastleigh

Fri 2/10

09:25-20:55

2 stops11h 30m

London Heathrow

Wed 31/12

00:00-00:00

Nonstop0h 00m

£207

SouthamptonLondon

SOU Southampton Eastleigh - LHR London Heathrow

SOULHR

Southampton Eastleigh

Wed 30/9

20:00-09:05

1 stop13h 05m

London Heathrow

Wed 7/10

14:20-19:30

1 stop5h 10m

£208

SouthamptonLondon

SOU Southampton Eastleigh - LHR London Heathrow

SOULHR

Southampton Eastleigh

Tue 29/9

09:15-13:55

1 stop4h 40m

London Heathrow

Tue 6/10

21:10-08:05

1 stop10h 55m

£210

SouthamptonLondon

SOU Southampton Eastleigh - LHR London Heathrow

SOULHR

Southampton Eastleigh

Wed 30/9

09:20-13:55

1 stop4h 35m

London Heathrow

Wed 7/10

18:45-08:35

2 stops13h 50m

£225

Flights are sorted by cheapest return flights first.

Deals found on 3/9

Showing 1-10 of 17 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 29% 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 £200, Aer Lingus can have you in London Heathrow Airport from Portsmouth in 5h 45m. Airlines will cover a distance of 53 mi.
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 £92

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/10. 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 6 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 6 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 6 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 6 September 2026.

Last-minute flights from Portsmouth to HeathrowDiscover last-minute flight deals from Portsmouth to Heathrow. Data last updated 6 September 2026 and is based on user searches.

Discover last-minute flight deals from Portsmouth to Heathrow. Data last updated 6 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 6 September 2026.

Search for one-way flight options from Portsmouth to Heathrow. Find affordable one-way fares based on user searches. Data last updated 6 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 6 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 29% 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 6 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 6 September 2026.

Last-minute flights from Portsmouth to Heathrow
Discover last-minute flight deals from Portsmouth to Heathrow. Data last updated 6 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 6 September 2026.