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Cheap flights from Northern Ireland to Portsmouth from £46

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 1/1. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — LHR
19 Dec — 26 Dec1
1 adult
1 adult, Economy, 0 bags

Find flight deals from Northern Ireland to Portsmouth

Enter your travel dates to find the best prices.

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 19 November 2025.

Sat 20/1206:40BHD - SOU
Nonstop1h 45mMultiple Airlines
Wed 31/1208:55SOU - BHD
Nonstop1h 40mMultiple Airlines
Deal found 17/11£188
Sat 20/1220:30BFS - SOU
2 stops12h 15mMultiple Airlines
Wed 31/1216:05SOU - BFS
2 stops16h 20mMultiple Airlines
Deal found 17/11£205
Wed 3/1220:40BFS - SOU
1 stop20h 40measyJet
Sun 7/1218:20SOU - BFS
1 stop22h 40measyJet
Deal found 18/11£206
Sat 20/1206:40BHD - SOU
Nonstop1h 45mMultiple Airlines
Sun 21/1216:35SOU - BHD
1 stop4h 15mMultiple Airlines
Deal found 17/11£217
Sat 20/1220:00BFS - SOU
2 stops12h 45mMultiple Airlines
Sun 21/1216:35SOU - BFS
1 stop6h 05mMultiple Airlines
Deal found 17/11£240
Wed 3/1221:05BFS - SOU
2 stops22h 35mMultiple Airlines
Sun 7/1218:20SOU - BFS
2 stops24h 05mMultiple Airlines
Deal found 18/11£243
Wed 26/1107:00BFS - SOU
2 stops8h 35mMultiple Airlines
Sat 29/1109:30SOU - BFS
1 stop5h 40mMultiple Airlines
Deal found 17/11£251
Sat 20/1206:40BHD - SOU
Nonstop1h 45mAer Lingus
Sun 21/1212:20SOU - BHD
Nonstop1h 35mAer Lingus
Deal found 17/11£252
Sat 20/1206:55BFS - SOU
1 stop6h 15measyJet
Sun 21/1218:20SOU - BFS
1 stop13h 25measyJet
Deal found 17/11£255
Sat 20/1206:55BFS - SOU
1 stop6h 15measyJet
Wed 31/1209:25SOU - BFS
1 stop10h 30measyJet
Deal found 17/11£262
Sat 20/1206:40BHD - SOU
Nonstop1h 45mBritish Airways
Sun 21/1219:00SOU - BHD
Nonstop1h 35mBritish Airways
Deal found 17/11£348

Cheap 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 19 November 2025.

Round-trip from

£87

One-way from

£46

Popular in

June

Cheapest in

January

Average price

£50
easyJet
  • easyJet
  • 1/1-8/1
  • 2 total stops
  • 29h 25m total
  • Northern Ireland to Portsmouth
Search Deals
easyJet
  • easyJet
  • 1/1
  • 1 total stop
  • 3h 45m total
  • Northern Ireland to Portsmouth
Search Deals
Highest demand for flights based on searches. 25% potential increase in price (£16 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 November 2025
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 19 November 2025.
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

BFS - SOU

BFSSOU

Belfast Intl

Thu 1/1

13:35-17:20

1 stop3h 45m

Southampton Eastleigh

Thu 8/1

17:55-19:35

1 stop25h 40m

£87

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Thu 1/1

13:35-17:20

1 stop3h 45m

Southampton Eastleigh

Thu 8/1

17:55-21:05

2 stops27h 10m

£151

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Fri 2/1

10:35-17:10

1 stop6h 35m

Southampton Eastleigh

Fri 9/1

17:45-07:25

1 stop13h 40m

£174

BelfastSouthampton

BHD - SOU

BHDSOU

Belfast City

Sat 20/12

06:40-08:25

Nonstop1h 45m

Southampton Eastleigh

Wed 31/12

08:55-10:35

Nonstop1h 40m

£188

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Sat 20/12

20:30-08:45

2 stops12h 15m

Southampton Eastleigh

Wed 31/12

16:05-08:25

2 stops16h 20m

£205

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Wed 3/12

20:40-17:20

1 stop20h 40m

Southampton Eastleigh

Sun 7/12

18:20-17:00

1 stop22h 40m

£206

BelfastSouthampton

BFS - SOU

BFSSOU

Belfast Intl

Fri 2/1

10:35-08:45

2 stops22h 10m

Southampton Eastleigh

Fri 9/1

17:45-07:25

1 stop13h 40m

£216

BelfastSouthampton

BHD - SOU

BHDSOU

Belfast City

Mon 16/2

10:10-11:50

Nonstop1h 40m

Southampton Eastleigh

Wed 18/2

12:15-13:50

Nonstop1h 35m

£228

BelfastSouthampton

BHD - SOU

BHDSOU

Belfast City

Tue 3/2

06:40-08:25

Nonstop1h 45m

Southampton Eastleigh

Wed 4/2

08:55-10:35

Nonstop1h 40m

£228

BelfastSouthampton

BHD - SOU

BHDSOU

Belfast City

Mon 30/3

06:40-08:25

Nonstop1h 45m

Southampton Eastleigh

Tue 31/3

08:55-10:35

Nonstop1h 40m

£229

Flights are sorted by cheapest return flights first.

Deals found on 17/11

Showing 1-10 of 34 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 £48). 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 19 November 2025.

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 43% versus a flight in the morning.

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 16 December 2024.

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. 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 40m. easyJet provides one of the quickest options available for as low as £228. Northern Ireland and Portsmouth are separated by a distance of 316 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.

  • 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 £48). 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

Browse thousands of different options on Cheapflights for your next trip

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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 19 November 2025.
AirlineCheapestAverageFlexibilityOn-time
RyanairCheapest£21Average£56FlexibilityNo cancel feeOn-timeN/A
Search Ryanair flights
easyJetCheapest£28Average£95FlexibilityNo cancel feeOn-time86%
Search easyJet flights
RyanairCheapest£49Average£65FlexibilityNo cancel feeOn-timeN/A
Search Ryanair flights
Aer LingusCheapest£73Average£160FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
British AirwaysCheapest£78Average£159FlexibilityNo cancel feeOn-time70%
Search British Airways flights
LoganairCheapest£136Average£208FlexibilityNo 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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