How long is the flight from Northern Ireland to Portsmouth?

A quick flight from Northern Ireland to Portsmouth can take about 1h 15m. easyJet provides one of the quickest options available for as low as £41. Northern Ireland and Portsmouth are separated by a distance of 326 mi. This flight may include one or multiple stops.

In terms of precipitation, rainfall in Portsmouth ranges from 25.0 - 76.0 inches per month. December is typically the wettest month, when rainfall can reach 76.0 mm. July is typically the driest time to visit Portsmouth when rainfall is around 25.0 mm.

If weather is an important factor for your trip to Portsmouth, 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 18.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 4.0 C).

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.

£21+ Cheap Flights from Northern Ireland to Portsmouth

Cheap flight deals from Northern Ireland to Portsmouth

Enter your travel dates to find the best prices.

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Best

Direct

Last-minute

One-way

Cheapest flights from Northern Ireland to Portsmouth
Explore the most affordable flight options available from Northern Ireland to Portsmouth. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 August 2026.

Sun 11/1010:50 -

Nonstop1h 15m

Sun 18/1012:35 -

Nonstop1h 15m

Deal found 20/8£41

Sat 3/1010:30 -

Nonstop1h 15m

Sun 4/1012:35 -

Nonstop1h 15m

Deal found 17/8£42

Mon 12/1010:35 -

Nonstop1h 15m

Sun 18/1012:35 -

Nonstop1h 15m

Deal found 21/8£43

Sun 27/910:50 -

Nonstop1h 15m

Mon 28/912:25 -

Nonstop1h 15m

Deal found 19/8£45

Sun 11/1010:50 -

Nonstop1h 15m

Mon 12/1012:25 -

Nonstop1h 15m

Deal found 20/8£48

Sun 20/910:50 -

Nonstop1h 15m

Mon 28/912:25 -

Nonstop1h 15m

Deal found 16/8£49

Sat 26/910:30 -

Nonstop1h 15m

Mon 28/912:25 -

Nonstop1h 15m

Deal found 19/8£57

Sun 6/910:25 -

Nonstop1h 40m

Tue 15/912:35 -

Nonstop1h 35m

Deal found 16/8£75

Fri 4/906:40 -

Nonstop1h 45m

Tue 8/908:55 -

Nonstop1h 40m

Deal found 20/8£77

Tue 15/917:25 -

Nonstop1h 35m

Tue 22/919:30 -

Nonstop1h 35m

Deal found 16/8£81

Sat 3/1010:25 -

Nonstop1h 40m

Sun 4/1008:55 -

Nonstop1h 40m

Deal found 18/8£87

Fri 11/1217:25 -

Nonstop1h 35m

Sun 13/1212:35 -

Nonstop1h 35m

Deal found 18/8£93

Best flights from Northern Ireland to Portsmouth
Discover carefully curated flight deals from Northern Ireland to Portsmouth that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 21 August 2026.

Sun 11/1010:50 -

Nonstop1h 15m

Sun 18/1012:35 -

Nonstop1h 15m

Deal found 20/8£41

Sat 3/1010:30 -

Nonstop1h 15m

Sun 4/1012:35 -

Nonstop1h 15m

Deal found 17/8£42

Mon 12/1010:35 -

Nonstop1h 15m

Sun 18/1012:35 -

Nonstop1h 15m

Deal found 21/8£43

Sun 27/910:50 -

Nonstop1h 15m

Mon 28/912:25 -

Nonstop1h 15m

Deal found 18/8£45

Sun 4/1010:50 -

Nonstop1h 15m

Sun 11/1012:35 -

Nonstop1h 15m

Deal found 20/8£46

Tue 15/917:25 -

Nonstop1h 35m

Tue 22/909:15 -

2 stops7h 15m

Deal found 16/8£153

Sat 26/910:30 -

Nonstop1h 15m

Mon 28/912:25 -

Nonstop1h 15m

Deal found 19/8£57

Thu 4/209:40 -

1 stop7h 20m

Fri 12/208:40 -

1 stop8h 10m

Deal found 17/8£213

Tue 8/906:40 -

Nonstop1h 45m

Tue 8/919:30 -

Nonstop1h 35m

Deal found 19/8£232

Sat 12/910:30 -

Nonstop1h 15m

Sat 26/912:15 -

Nonstop1h 15m

Deal found 16/8£78

Sat 3/1010:25 -

Nonstop1h 40m

Sun 4/1020:00 -

2 stops12h 10m

Deal found 16/8£158

Thu 4/209:40 -

1 stop7h 20m

Sat 13/209:25 -

1 stop7h 25m

Deal found 17/8£225

Sat 26/914:40 -

Nonstop1h 35m

Mon 28/912:35 -

Nonstop1h 35m

Deal found 16/8£232

Sat 31/1006:40 -

Nonstop1h 45m

Sat 7/1108:55 -

Nonstop1h 40m

Deal found 20/8£233

Sun 11/1010:25 -

Nonstop1h 40m

Wed 14/1012:35 -

Nonstop1h 35m

Deal found 19/8£233

Sat 3/1010:25 -

Nonstop1h 40m

Sun 4/1019:30 -

Nonstop1h 35m

Deal found 19/8£233

Find flight deals from Northern Ireland to Portsmouth

Round-trip from	£41
One-way from	£21
Popular in	July
Cheapest in	November
Average price	£98

easyJet
11/10-18/10
Nonstop
2h 30m total
Northern Ireland to Portsmouth

Search Deals

easyJet
3/10
Nonstop
1h 15m total
Northern Ireland to Portsmouth

Search Deals

Highest demand for flights based on searches. 29% potential increase in price (£20 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 4% potential price decrease (£3 potential savings vs. average return price).

Search Deals

Average for round-trip flights in August 2026

Search Deals

Cheapflights Fare Finder

Use the filters below to find and compare flights from Northern Ireland to Portsmouth that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Fastest return journey

BelfastSouthampton

BFS Belfast Intl - SOU Southampton Eastleigh

BFSSOU

Belfast Intl

Sun 11/10

10:50-12:05

Nonstop1h 15m

Southampton Eastleigh

Sun 18/10

12:35-13:50

Nonstop1h 15m

£41

BelfastSouthampton

BFS Belfast Intl - SOU Southampton Eastleigh

BFSSOU

Belfast Intl

Sat 3/10

10:30-11:45

Nonstop1h 15m

Southampton Eastleigh

Sun 4/10

12:35-13:50

Nonstop1h 15m

£42

BelfastSouthampton

BFS Belfast Intl - SOU Southampton Eastleigh

BFSSOU

Belfast Intl

Mon 12/10

10:35-11:50

Nonstop1h 15m

Southampton Eastleigh

Sun 18/10

12:35-13:50

Nonstop1h 15m

£43

BelfastSouthampton

BFS Belfast Intl - SOU Southampton Eastleigh

BFSSOU

Belfast Intl

Sun 27/9

10:50-12:05

Nonstop1h 15m

Southampton Eastleigh

Mon 28/9

12:25-13:40

Nonstop1h 15m

£45

BelfastSouthampton

BFS Belfast Intl - SOU Southampton Eastleigh

BFSSOU

Belfast Intl

Sun 4/10

10:50-12:05

Nonstop1h 15m

Southampton Eastleigh

Sun 11/10

12:35-13:50

Nonstop1h 15m

£46

BelfastSouthampton

BFS Belfast Intl - SOU Southampton Eastleigh

BFSSOU

Belfast Intl

Sat 26/9

10:30-11:45

Nonstop1h 15m

Southampton Eastleigh

Mon 28/9

12:25-13:40

Nonstop1h 15m

£57

BelfastSouthampton

BFS Belfast Intl - SOU Southampton Eastleigh

BFSSOU

Belfast Intl

Sat 12/9

10:30-11:45

Nonstop1h 15m

Southampton Eastleigh

Sat 26/9

12:15-13:30

Nonstop1h 15m

£78

BelfastSouthampton

BHD Belfast City - SOU Southampton Eastleigh

BHDSOU

Belfast City

Tue 15/9

17:25-19:00

Nonstop1h 35m

Southampton Eastleigh

Tue 22/9

09:15-16:30

2 stops7h 15m

£153

BelfastSouthampton

BHD Belfast City - SOU Southampton Eastleigh

BHDSOU

Belfast City

Sat 3/10

10:25-12:05

Nonstop1h 40m

Southampton Eastleigh

Sun 4/10

20:00-08:10

2 stops12h 10m

£158

BelfastSouthampton

BHD Belfast City - SOU Southampton Eastleigh

BHDSOU

Belfast City

Thu 4/2

09:40-17:00

1 stop7h 20m

Southampton Eastleigh

Fri 12/2

08:40-16:50

1 stop8h 10m

£213

Flights are sorted by cheapest return flights first.

Deals found on 16/8

Showing 1-10 of 33 resultsSorted by cheapest first

Best time to book a flight from Northern Ireland to Portsmouth

Have a flexible travel schedule? Discover the best time to fly to Portsmouth from Northern Ireland with our price prediction graph.

BFS-SOU

BHD-SOU

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 Northern Ireland to Portsmouth

GBNIR-P0R

BFS-SOU

BHD-SOU

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 30% versus a flight in the afternoon.

How much does it cost for a return flight from Northern Ireland to Portsmouth?

Airfare is below average for this route at the moment.

Northern Ireland to Portsmouth flights typically cost between £84 and £152 in October.
The cheapest return price found within the last 5 days was £41 on easyJet (11 Oct–18 Oct).

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

How long is the flight from Northern Ireland to Portsmouth?
A quick flight from Northern Ireland to Portsmouth can take about 1h 15m. easyJet provides one of the quickest options available for as low as £41. Northern Ireland and Portsmouth are separated by a distance of 326 mi. This flight may include one or multiple stops.
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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Northern Ireland to Portsmouth

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Top 5 airlines flying from Northern Ireland to Portsmouth

Airline	Cheapest	Average	Flexibility	On-time
easyJet	Cheapest£18	Average£90	FlexibilityNo cancel fee	On-time86%	Search easyJet flights
Ryanair	Cheapest£18	Average£60	FlexibilityNo cancel fee	On-timeN/A	Search Ryanair flights
Aer Lingus	Cheapest£83	Average£138	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
British Airways	Cheapest£86	Average£174	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Loganair	Cheapest£140	Average£193	FlexibilityNo cancel fee	On-time79%	Search Loganair flights

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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Cheap flights from Northern Ireland to Portsmouth from £21

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 3/10. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Northern Ireland to Portsmouth

Cheapest flights from Northern Ireland to PortsmouthExplore the most affordable flight options available from Northern Ireland to Portsmouth. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 August 2026.

Explore the most affordable flight options available from Northern Ireland to Portsmouth. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 August 2026.

Best flights from Northern Ireland to PortsmouthDiscover carefully curated flight deals from Northern Ireland to Portsmouth that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 21 August 2026.

Discover carefully curated flight deals from Northern Ireland to Portsmouth that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 21 August 2026.

Direct flights from Northern Ireland to PortsmouthExplore direct flight options from Northern Ireland to Portsmouth based on user searches, and compare prices and availability for your desired travel dates. Data last updated 21 August 2026.

Explore direct flight options from Northern Ireland to Portsmouth based on user searches, and compare prices and availability for your desired travel dates. Data last updated 21 August 2026.

Last-minute flights from Northern Ireland to PortsmouthDiscover last-minute flight deals from Northern Ireland to Portsmouth. Data last updated 21 August 2026 and is based on user searches.

Discover last-minute flight deals from Northern Ireland to Portsmouth. Data last updated 21 August 2026 and is based on user searches.

One-way flights from Northern Ireland to PortsmouthSearch for one-way flight options from Northern Ireland to Portsmouth. Find affordable one-way fares based on user searches. Data last updated 21 August 2026.

Search for one-way flight options from Northern Ireland to Portsmouth. Find affordable one-way fares based on user searches. Data last updated 21 August 2026.

Find flight deals from Northern Ireland to Portsmouth

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

Use the filters below to find and compare flights from Northern Ireland to Portsmouth that are best for you.

Best time to book a flight from Northern Ireland to Portsmouth

Have a flexible travel schedule? Discover the best time to fly to Portsmouth from Northern Ireland with our price prediction graph.

Cheapflights Insights

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

Find hourly flight availability from Northern Ireland to Portsmouth. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 21 August 2026.

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 30% versus a flight in the afternoon.

How much does it cost for a return flight from Northern Ireland to Portsmouth?

Airfare is below average for this route at the moment.

Northern Ireland to Portsmouth flights typically cost between £84 and £152 in October.The cheapest return price found within the last 5 days was £41 on easyJet (11 Oct–18 Oct).

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

Use this chart to determine the cheapest time to fly return from Northern Ireland to Portsmouth. Price data was last updated on 15 August 2026.

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

How long is the flight from Northern Ireland to Portsmouth?

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

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

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

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 Northern Ireland to Portsmouth

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

Complete your trip

Complete your trip to Portsmouth by adding a car hire and/or hotel booking to your travel itinerary.

Direct flights to England

Book a non-stop flight to one of these other cities located in England.

Search flights from Northern Ireland to Portsmouth by cabin class

Find flights from Northern Ireland to Portsmouth, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Northern Ireland and Portsmouth flights

Browse other Northern Ireland and Portsmouth flight options. Last updated on 21 August 2026.

Popular flight searches

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Northern Ireland to Portsmouth flights

Consider these flights travelling from Northern Ireland to Portsmouth.

Top 5 airlines flying from Northern Ireland to Portsmouth

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

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

Can Cheapflights 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?

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Book with Flexibility

Travel Smart

Cheapest flights from Northern Ireland to Portsmouth
Explore the most affordable flight options available from Northern Ireland to Portsmouth. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 August 2026.

Best flights from Northern Ireland to Portsmouth
Discover carefully curated flight deals from Northern Ireland to Portsmouth that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 21 August 2026.

Direct flights from Northern Ireland to Portsmouth
Explore direct flight options from Northern Ireland to Portsmouth based on user searches, and compare prices and availability for your desired travel dates. Data last updated 21 August 2026.

Last-minute flights from Northern Ireland to Portsmouth
Discover last-minute flight deals from Northern Ireland to Portsmouth. Data last updated 21 August 2026 and is based on user searches.

One-way flights from Northern Ireland to Portsmouth
Search for one-way flight options from Northern Ireland to Portsmouth. Find affordable one-way fares based on user searches. Data last updated 21 August 2026.

Northern Ireland to Portsmouth flights typically cost between £84 and £152 in October.
The cheapest return price found within the last 5 days was £41 on easyJet (11 Oct–18 Oct).