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Cheap flights from Northern Ireland to Portsmouth from £33

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 16/2. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — LHR
1 Feb — 8 Feb1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Northern Ireland to Portsmouth

Enter your travel dates to find the best prices.

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 2 January 2026.

Tue 10/210:10BHD - SOU
Nonstop1h 35mAer Lingus
Tue 17/212:15SOU - BHD
Nonstop1h 35mAer Lingus
Deal found 1/1£88
Thu 7/508:20BFS - SOU
1 stop23h 05measyJet
Fri 22/512:20SOU - BFS
Nonstop1h 15measyJet
Deal found 1/1£117
Thu 14/509:15BFS - SOU
2 stops22h 10mMultiple Airlines
Sun 17/512:35SOU - BFS
Nonstop1h 15mMultiple Airlines
Deal found 1/1£148
Mon 2/310:10BHD - SOU
Nonstop1h 40mBritish Airways
Tue 3/308:55SOU - BHD
Nonstop1h 40mBritish Airways
Deal found 31/12£229
Sat 7/207:00BFS - SOU
1 stop6h 10measyJet
Sun 15/218:20SOU - BFS
1 stop26h 00measyJet
Deal found 31/12£117
Fri 6/211:45BFS - SOU
1 stop5h 25measyJet
Sun 15/218:20SOU - BFS
1 stop26h 00measyJet
Deal found 31/12£126
Tue 10/211:05BHD - SOU
1 stop6h 25mMultiple Airlines
Tue 17/212:15SOU - BHD
Nonstop1h 35mMultiple Airlines
Deal found 1/1£150
Thu 14/517:40BFS - SOU
1 stop13h 45measyJet
Sun 17/512:35SOU - BFS
Nonstop1h 15measyJet
Deal found 1/1£128
Sat 7/207:00BFS - SOU
1 stop6h 10mMultiple Airlines
Sat 14/217:15SOU - BFS
1 stop4h 45mMultiple Airlines
Deal found 31/12£157
Thu 7/514:40BHD - SOU
Nonstop1h 35mAer Lingus
Fri 22/508:55SOU - BHD
Nonstop1h 40mAer Lingus
Deal found 1/1£186
Sun 15/207:10BFS - SOU
1 stop10h 35mMultiple Airlines
Sun 22/218:20SOU - BFS
1 stop13h 25mMultiple Airlines
Deal found 1/1£160
Thu 14/506:40BHD - SOU
Nonstop1h 45mAer Lingus
Sun 17/512:30SOU - BHD
Nonstop1h 35mAer Lingus
Deal found 1/1£186
Fri 20/210:35BFS - SOU
1 stop6h 35measyJet
Thu 26/217:55SOU - BFS
1 stop25h 40measyJet
Deal found 1/1£171
Fri 20/207:00BHD - SOU
1 stop10h 30mMultiple Airlines
Thu 26/212:20SOU - BHD
Nonstop1h 35mMultiple Airlines
Deal found 1/1£172
Fri 19/610:55BHD - SOU
Nonstop1h 40mAer Lingus
Wed 24/616:45SOU - BHD
Nonstop1h 35mAer Lingus
Deal found 31/12£194
Thu 14/507:15BHD - SOU
1 stop3h 50mMultiple Airlines
Sun 17/508:55SOU - BHD
Nonstop1h 40mMultiple Airlines
Deal found 1/1£196

Find flight deals from Northern Ireland to Portsmouth

Keep the following information in mind while searching for Northern Ireland to Portsmouth flight deals. Data was last updated 2 January 2026.

Round-trip from

£88

One-way from

£33

Popular in

June

Cheapest in

January

Average price

£43
Aer Lingus
  • Aer Lingus
  • 12/1-12/1
  • Nonstop
  • 3h 15m total
  • Northern Ireland to Portsmouth
Search Deals
easyJet
  • easyJet
  • 16/2
  • 1 total stop
  • 24h 35m total
  • Northern Ireland to Portsmouth
Search Deals
Highest demand for flights based on searches. 23% potential increase in price (£14 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 January 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Northern Ireland to Portsmouth that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 2 January 2026.
Use the filters below to find and compare flights from Northern Ireland to Portsmouth that are best for you.

Fly from

Northern Ireland

Fly to

Portsmouth

Route

Depart

Return

Price

BelfastSouthampton

BHD - SOU

BHDSOU

Belfast City

Tue 10/2

10:10-11:45

Nonstop1h 35m

Southampton Eastleigh

Tue 17/2

12:15-13:50

Nonstop1h 35m

£88

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Thu 7/5

08:20-07:25

1 stop23h 05m

Southampton Eastleigh

Fri 22/5

12:20-13:35

Nonstop1h 15m

£117

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Sat 7/2

07:00-13:10

1 stop6h 10m

Southampton Eastleigh

Sun 15/2

18:20-20:20

1 stop26h 00m

£117

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Fri 6/2

11:45-17:10

1 stop5h 25m

Southampton Eastleigh

Sun 15/2

18:20-20:20

1 stop26h 00m

£126

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Thu 14/5

17:40-07:25

1 stop13h 45m

Southampton Eastleigh

Sun 17/5

12:35-13:50

Nonstop1h 15m

£128

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Thu 14/5

09:15-07:25

2 stops22h 10m

Southampton Eastleigh

Sun 17/5

12:35-13:50

Nonstop1h 15m

£148

BelfastSouthampton

BHD - SOU

BHDSOU

Belfast City

Tue 10/2

11:05-17:30

1 stop6h 25m

Southampton Eastleigh

Tue 17/2

12:15-13:50

Nonstop1h 35m

£150

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Sat 7/2

07:00-13:10

1 stop6h 10m

Southampton Eastleigh

Sat 14/2

17:15-22:00

1 stop4h 45m

£157

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Sun 15/2

07:10-17:45

1 stop10h 35m

Southampton Eastleigh

Sun 22/2

18:20-07:45

1 stop13h 25m

£160

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Fri 20/2

10:35-17:10

1 stop6h 35m

Southampton Eastleigh

Thu 26/2

17:55-19:35

1 stop25h 40m

£171

Flights are sorted by cheapest return flights first.

Deals found on 1/1

Showing 1-10 of 26 results
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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.
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

What is the cheapest month to book a flight from Northern Ireland to Portsmouth?

Currently, March is the cheapest month in which you can book a flight from Northern Ireland to Portsmouth (average of £14). Flying from Northern Ireland to Portsmouth in July is currently the most expensive (average of £47). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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 2 January 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 46% versus a flight in the afternoon.

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 27 December 2025.

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

Related info for your journey

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

    A quick flight from Northern Ireland to Portsmouth can take about 1h 35m. Aer Lingus provides one of the quickest options available for as low as £88. Northern Ireland and Portsmouth are separated by a distance of 316 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from Northern Ireland to Portsmouth one-way?

    For one-way options, check prices for easyJet. According to our data, you can fly for as low as £26. Users have also found prices from £36 and £85 on Aer Lingus and British Airways, respectively.

  • 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.

  • What is the cheapest month to book a flight from Northern Ireland to Portsmouth?

    Currently, March is the cheapest month in which you can book a flight from Northern Ireland to Portsmouth (average of £14). Flying from Northern Ireland to Portsmouth in July is currently the most expensive (average of £47). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for Northern Ireland to Portsmouth

See prices for flight routes from nearby airports that may be better suited for you.
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Top 6 airlines flying from Northern Ireland to Portsmouth

Discover the top 6 airlines that operate flights from Northern Ireland to Portsmouth. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 2 January 2026.
AirlineCheapestAverageFlexibilityOn-time
RyanairCheapest£26Average£56FlexibilityNo cancel feeOn-timeN/A
Search Ryanair flights
easyJetCheapest£27Average£94FlexibilityNo cancel feeOn-time86%
Search easyJet flights
RyanairCheapest£48Average£63FlexibilityNo cancel feeOn-timeN/A
Search Ryanair flights
Aer LingusCheapest£71Average£160FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
British AirwaysCheapest£79Average£158FlexibilityNo cancel feeOn-time70%
Search British Airways flights
LoganairCheapest£133Average£205FlexibilityNo cancel feeOn-time79%
Search Loganair flights

Fly with Cheapflights

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 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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