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Cheap flights from Northern Ireland to Portsmouth

BFS — LHR
23 Nov — 30 Nov1
1 adult
1 adult, Economy, 0 bags

Find flight deals from Northern Ireland to Portsmouth

Popular in

July

Cheapest in

March

Average price

£67
Highest demand for flights based on searches. 28% potential increase in price (£20 potential increase over avg. return price).
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Cheapest flight prices on average. 6% potential price decrease (£3 potential savings vs. average return price).
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Average for round-trip flights in October 2026
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Cheapflights Insights

Everything you need to know about your flight from Northern Ireland to Portsmouth

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

When flying from Northern Ireland to Portsmouth, 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 17% versus a flight in the afternoon.

What is the cheapest day to fly from Northern Ireland to Portsmouth?

Travellers seeking maximum savings on their Northern Ireland to Portsmouth flight should consider departing on Tuesday at midday when fares are most often at their lowest. Monday at midday flights should be avoided if possible as fares are typically the most expensive at this time.

Related info for your journey

  • Can I find deals for flights from Northern Ireland to Portsmouth that include hotel bookings?

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

  • How can I find direct flights from Northern Ireland to Portsmouth?

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

  • Can I find deals for business class flights from Northern Ireland to Portsmouth?

    Yes. Cheapflights offers flight deals from Northern Ireland 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.

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Northern Ireland to Portsmouth

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Glasgow Intl to Heathrow flights
Glasgow Intl to Stansted flights
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Belfast Intl to Liverpool flights
Manchester to Southend flights
Southend to Manchester flights
Belfast Intl to Edinburgh flights
Belfast City to Heathrow flights
Glasgow Intl to Luton flights
Edinburgh to Heathrow flights
Heathrow to Manchester flights
Belfast City to Stansted flights
Belfast City to Manchester flights
Belfast City to London City flights
Edinburgh to London City flights
Belfast City to Gatwick flights
Belfast City to Luton flights
Belfast Intl to Birmingham flights
Edinburgh to Southend flights
Glasgow Intl to Gatwick flights
Belfast City to Edinburgh flights
Belfast City to Liverpool flights
Newcastle upon Tyne to Gatwick flights
Newcastle upon Tyne to London City flights
Newcastle upon Tyne to Luton flights
Newcastle upon Tyne to Stansted flights
Belfast Intl to Bristol flights
Bristol to Edinburgh flights
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Glasgow Intl to London City flights

Top 5 airlines flying from Northern Ireland to Portsmouth

AirlineCheapestAverageFlexibilityOn-time
easyJetCheapest£19Average£89FlexibilityNo cancel feeOn-time86%
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RyanairCheapest£20Average£66FlexibilityNo cancel feeOn-timeN/A
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Aer LingusCheapest£82Average£138FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
British AirwaysCheapest£91Average£177FlexibilityNo cancel feeOn-time70%
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LoganairCheapest£144Average£197FlexibilityNo cancel feeOn-time79%
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Fly with Cheapflights

How does Cheapflights help users find flights from Northern Ireland to Portsmouth?

Deals for Northern Ireland to Portsmouth flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

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

Cheapflights helps you find that perfect flight to Portsmouth from Northern Ireland by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

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

Yes! Cheapflights helps users easily find flights from Northern Ireland to Portsmouth with no change fees.

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

Not ready to book yet? You can track prices for flights from Northern Ireland to Portsmouth on Cheapflights with our Price Alert feature and get notified when better prices are available.

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