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Cheap flights from London Heathrow Airport to Portsmouth, New Hampshire

LHR — PSM
9 Jul — 16 Jul1
1 adult

Cheap flight deals from Heathrow to Portsmouth

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to Portsmouth (PSM). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 4 July 2025.

Popular in

August

Cheapest in

September

Average price

£544
Highest demand for flights based on searches. 9% potential increase in price (£36 potential increase over avg. return price).
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Cheapest flight prices on average. 2% potential price decrease (£9 potential savings vs. average return price).
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Average for round-trip flights in July 2025
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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.

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.

  • What airport do you fly into for flights to Portsmouth from London Heathrow?

    Portsmouth Pease Intl (PSM) is the airport you will fly into if you book a flight from London Heathrow to Portsmouth. You should not have trouble finding flights to Pease Intl from London Heathrow; the airport handles an average of 0 inbound flights from London Heathrow per day. You should also have plenty of airline options to choose from since 0 airlines have flights to the Portsmouth airport from London Heathrow. It is only a 3.2 mi journey from Pease Intl (PSM) to Portsmouth’s city center.

  • 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?

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 Heathrow to Portsmouth.

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

Cheapflights does show flights with no change fees to all users. To see these options for flights from Heathrow to Portsmouth, users can toggle the no change fees filter when performing a flight search.

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

Of course! You can now track prices for flights from Heathrow to Portsmouth and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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