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

For as low as £220, Aer Lingus can have you in London Heathrow Airport from Portsmouth in 4h 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.

£71+ Flights from Portsmouth to London Heathrow Airport

Cheap flight deals from Portsmouth to Heathrow

Enter your travel dates to find the best prices.

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 28 December 2025.

Sun 28/1219:40SOU - LHR

1 stop12h 35mMultiple Airlines

Sun 4/106:50LHR - SOU

1 stop13h 10mMultiple Airlines

Deal found 27/12£427

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 28 December 2025.

Tue 10/212:25SOU - LHR

1 stop4h 25mAer Lingus

Tue 17/209:50LHR - SOU

1 stop5h 45mAer Lingus

Deal found 27/12£220

Mon 9/212:20SOU - LHR

1 stop8h 25mMultiple Airlines

Mon 16/218:45LHR - SOU

1 stop13h 40mMultiple Airlines

Deal found 26/12£257

Sat 10/109:25SOU - LHR

1 stop7h 35mKLM

Tue 13/120:25LHR - SOU

1 stop12h 25mKLM

Deal found 27/12£285

Wed 11/312:00SOU - LHR

1 stop6h 25mBritish Airways

Thu 12/306:50LHR - SOU

1 stop10h 40mBritish Airways

Deal found 25/12£295

Sat 24/109:30SOU - LHR

1 stop6h 05mAer Lingus

Mon 26/114:15LHR - SOU

1 stop5h 25mAer Lingus

Deal found 26/12£243

Sun 11/109:30SOU - LHR

1 stop4h 55mAer Lingus

Thu 15/115:10LHR - SOU

1 stop4h 30mAer Lingus

Deal found 26/12£267

Wed 14/108:55SOU - LHR

1 stop5h 00mBritish Airways

Thu 12/207:45LHR - SOU

1 stop4h 05mBritish Airways

Deal found 25/12£365

Sun 11/115:25SOU - LHR

2 stops6h 15mMultiple Airlines

Thu 15/109:00LHR - SOU

1 stop4h 35mMultiple Airlines

Deal found 26/12£385

Sat 10/109:30SOU - LHR

1 stop6h 05mMultiple Airlines

Tue 13/108:50LHR - SOU

2 stops8h 40mMultiple Airlines

Deal found 27/12£433

Tue 10/208:40SOU - LHR

2 stops8h 10mMultiple Airlines

Tue 17/209:50LHR - SOU

1 stop5h 45mMultiple Airlines

Deal found 27/12£540

Last-minute flights from Portsmouth to Heathrow
Discover last-minute flight deals from Portsmouth to Heathrow. Data last updated 28 December 2025 and is based on user searches.

Sun 28/1219:40SOU - LHR

1 stop12h 35mMultiple Airlines

Sun 4/106:50LHR - SOU

1 stop13h 10mMultiple Airlines

Deal found 27/12£427

Sat 10/109:25SOU - LHR

1 stop7h 35mKLM

Tue 13/120:25LHR - SOU

1 stop12h 25mKLM

Deal found 27/12£285

Sat 10/109:30SOU - LHR

1 stop6h 05mMultiple Airlines

Tue 13/108:50LHR - SOU

2 stops8h 40mMultiple Airlines

Deal found 27/12£433

Sun 11/109:30SOU - LHR

1 stop4h 55mAer Lingus

Thu 15/115:10LHR - SOU

1 stop4h 30mAer Lingus

Deal found 26/12£267

Sun 11/115:25SOU - LHR

2 stops6h 15mMultiple Airlines

Thu 15/109:00LHR - SOU

1 stop4h 35mMultiple Airlines

Deal found 26/12£385

Wed 14/108:55SOU - LHR

1 stop5h 00mBritish Airways

Thu 12/207:45LHR - SOU

1 stop4h 05mBritish Airways

Deal found 25/12£365

Sat 24/109:30SOU - LHR

1 stop6h 05mAer Lingus

Mon 26/114:15LHR - SOU

1 stop5h 25mAer Lingus

Deal found 26/12£243

Find flight deals from Portsmouth to Heathrow

Round-trip from	£220
One-way from	£71

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

Search Deals

27/1
1 total stop
23h 05m 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.

Fly from

Fly to

Route

Depart

Return

Price

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Tue 10/2

12:25-16:50

1 stop4h 25m

London Heathrow

Tue 17/2

09:50-15:35

1 stop5h 45m

£220

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Sat 24/1

09:30-15:35

1 stop6h 05m

London Heathrow

Mon 26/1

14:15-19:40

1 stop5h 25m

£243

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Mon 9/2

12:20-20:45

1 stop8h 25m

London Heathrow

Mon 16/2

18:45-08:25

1 stop13h 40m

£257

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Sun 11/1

09:30-14:25

1 stop4h 55m

London Heathrow

Thu 15/1

15:10-19:40

1 stop4h 30m

£267

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Sat 10/1

09:25-17:00

1 stop7h 35m

London Heathrow

Tue 13/1

20:25-08:50

1 stop12h 25m

£285

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Wed 11/3

12:00-18:25

1 stop6h 25m

London Heathrow

Thu 12/3

06:50-17:30

1 stop10h 40m

£295

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Wed 14/1

08:55-13:55

1 stop5h 00m

London Heathrow

Thu 12/2

07:45-11:50

1 stop4h 05m

£365

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Sun 11/1

15:25-21:40

2 stops6h 15m

London Heathrow

Thu 15/1

09:00-13:35

1 stop4h 35m

£385

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Sat 10/1

09:30-15:35

1 stop6h 05m

London Heathrow

Tue 13/1

08:50-17:30

2 stops8h 40m

£433

SouthamptonLondon

SOU - LHR

SOULHR

Southampton Eastleigh

Tue 10/2

08:40-16:50

2 stops8h 10m

London Heathrow

Tue 17/2

09:50-15:35

1 stop5h 45m

£540

Flights are sorted by cheapest return flights first.

Deals found on 27/12

Showing 1-10 of 11 results

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.

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

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 56% versus a flight in the morning.

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 Tuesday mornings when fares are most often at their lowest. Thursday at midday 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 £220, Aer Lingus can have you in London Heathrow Airport from Portsmouth in 4h 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.

See more FAQs

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Hounslow

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Gatwick

Wembley

Ilford

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Hayes

Watford

Crawley

Swindon

Bedford

Romford

Chichester

Eastbourne

Ipswich

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Cheapflights makes it easy to find Portsmouth to Heathrow flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

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

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Portsmouth to Heathrow.

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

Users can book flights with no change fees policies with our dedicated filters. Book flights from Portsmouth to Heathrow flexibly with Cheapflights today.

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Cheap flights from Portsmouth to London Heathrow Airport from £71

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 27/1. 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 28 December 2025.

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 28 December 2025.

Find flight deals from Portsmouth to Heathrow

Keep the following information in mind while searching for Portsmouth to Heathrow flight deals. Data was last updated 28 December 2025.

Round-trip from

One-way from

Cheapflights Fare Finder

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

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

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 28 December 2025.

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 20 December 2025.

Related info for your journey

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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Portsmouth to Heathrow

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

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Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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

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

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 28 December 2025.