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

For as low as £245, Aer Lingus can have you in London Heathrow Airport from Portsmouth in 9h 45m. 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.

£214+ 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 20 August 2026.

Thu 1/1009:25 -

1 stop13h 10m

Thu 8/1020:50 -

1 stop11h 55m

Deal found 17/8£214

Sun 27/909:20 -

1 stop11h 00m

Tue 29/919:35 -

1 stop12h 30m

Deal found 15/8£220

Sun 1/1109:30 -

1 stop9h 45m

Sat 7/1106:30 -

1 stop10h 20m

Deal found 19/8£245

Wed 30/917:20 -

1 stop3h 35m

Wed 7/1020:55 -

1 stop11h 40m

Deal found 16/8£245

Thu 1/1017:20 -

1 stop3h 35m

Thu 8/1020:55 -

1 stop11h 40m

Deal found 17/8£247

Tue 15/920:00 -

1 stop14h 20m

Tue 22/915:10 -

1 stop4h 20m

Deal found 18/8£252

Sat 26/909:20 -

1 stop11h 00m

Sat 3/1007:40 -

1 stop9h 10m

Deal found 15/8£253

Wed 23/908:55 -

1 stop7h 05m

Thu 24/915:10 -

1 stop4h 20m

Deal found 19/8£253

Wed 16/917:20 -

1 stop3h 35m

Wed 23/920:55 -

1 stop11h 40m

Deal found 19/8£259

Sat 12/917:20 -

1 stop14h 20m

Sat 19/906:30 -

1 stop10h 20m

Deal found 15/8£270

Find flight deals from Portsmouth to Heathrow

Round-trip from	£214

1/10-8/10
2 total stops
25h 05m total
Portsmouth to London

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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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Fly to

Route

Depart

Return

Price

Cheapest return flight

SouthamptonLondon

SOU Southampton Eastleigh - LHR London Heathrow

SOULHR

Southampton Eastleigh

Sun 27/9

09:20-20:20

1 stop11h 00m

London Heathrow

Tue 29/9

19:35-08:05

1 stop12h 30m

£220

SouthamptonLondon

SOU Southampton Eastleigh - LHR London Heathrow

SOULHR

Southampton Eastleigh

Sun 1/11

09:30-19:15

1 stop9h 45m

London Heathrow

Sat 7/11

06:30-16:50

1 stop10h 20m

£245

SouthamptonLondon

SOU Southampton Eastleigh - LHR London Heathrow

SOULHR

Southampton Eastleigh

Thu 1/10

17:20-20:55

1 stop3h 35m

London Heathrow

Thu 8/10

20:55-08:35

1 stop11h 40m

£247

SouthamptonLondon

SOU Southampton Eastleigh - LHR London Heathrow

SOULHR

Southampton Eastleigh

Sat 26/9

09:20-20:20

1 stop11h 00m

London Heathrow

Sat 3/10

07:40-16:50

1 stop9h 10m

£253

SouthamptonLondon

SOU Southampton Eastleigh - LHR London Heathrow

SOULHR

Southampton Eastleigh

Wed 16/9

17:20-20:55

1 stop3h 35m

London Heathrow

Wed 23/9

20:55-08:35

1 stop11h 40m

£259

SouthamptonLondon

SOU Southampton Eastleigh - LHR London Heathrow

SOULHR

Southampton Eastleigh

Sat 12/9

17:20-07:40

1 stop14h 20m

London Heathrow

Sat 19/9

06:30-16:50

1 stop10h 20m

£270

SouthamptonLondon

SOU Southampton Eastleigh - LHR London Heathrow

SOULHR

Southampton Eastleigh

Thu 1/10

11:40-20:20

2 stops8h 40m

London Heathrow

Thu 8/10

15:10-19:30

1 stop4h 20m

£279

SouthamptonLondon

SOU Southampton Eastleigh - LHR London Heathrow

SOULHR

Southampton Eastleigh

Tue 1/9

20:00-08:05

1 stop12h 05m

London Heathrow

Sat 5/9

21:10-08:35

1 stop11h 25m

£283

Fastest return journey

SouthamptonLondon

SOU Southampton Eastleigh - LHR London Heathrow

SOULHR

Southampton Eastleigh

Mon 21/9

09:20-13:55

1 stop4h 35m

London Heathrow

Mon 28/9

15:10-19:30

1 stop4h 20m

£286

SouthamptonLondon

SOU Southampton Eastleigh - LHR London Heathrow

SOULHR

Southampton Eastleigh

Mon 14/9

20:00-08:05

1 stop12h 05m

London Heathrow

Mon 21/9

15:10-19:30

1 stop4h 20m

£287

Flights are sorted by cheapest return flights first.

Deals found on 18/8

Showing 1-10 of 12 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 £245, Aer Lingus can have you in London Heathrow Airport from Portsmouth in 9h 45m. 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 £214

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/10. 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 20 August 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 20 August 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 20 August 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 20 August 2026.

Last-minute flights from Portsmouth to HeathrowDiscover last-minute flight deals from Portsmouth to Heathrow. Data last updated 20 August 2026 and is based on user searches.

Discover last-minute flight deals from Portsmouth to Heathrow. Data last updated 20 August 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 20 August 2026.

Search for one-way flight options from Portsmouth to Heathrow. Find affordable one-way fares based on user searches. Data last updated 20 August 2026.

Find flight deals from Portsmouth to Heathrow

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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 20 August 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 find flights from Portsmouth to Heathrow with no change fees?

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 20 August 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 20 August 2026.

Last-minute flights from Portsmouth to Heathrow
Discover last-minute flight deals from Portsmouth to Heathrow. Data last updated 20 August 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 20 August 2026.