£42 Find Cheap Flights from Ireland to Portsmouth

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to Portsmouth departing on 24/11. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

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Cheap Flights from Ireland to Portsmouth

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Ireland to Portsmouth that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from Ireland to Portsmouth

Tue, 9 Sep - Thu, 11 Sep
Aer Lingus Logo
07:00 - 08:40DUB-SOU
1h 40mdirect
Aer Lingus Logo
20:00 - 21:35SOU-DUB
1h 35mdirect
£77Aer Lingus
Find Deal
Thu, 4 Sep - Thu, 4 Sep
Aer Lingus Logo
07:00 - 08:40DUB-SOU
1h 40mdirect
Aer Lingus Logo
20:00 - 21:35SOU-DUB
1h 35mdirect
£84Aer Lingus
Find Deal
Thu, 18 Sep - Mon, 22 Sep
Aer Lingus Logo
07:00 - 08:40DUB-SOU
1h 40mdirect
Aer Lingus Logo
20:00 - 21:35SOU-DUB
1h 35mdirect
£104Aer Lingus
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Thu, 18 Sep - Mon, 22 Sep
 Logo
07:00 - 08:40DUB-SOU
1h 40mdirect
 Logo
08:05 - 12:25SOU-DUB
4h 20m1 stop
Thu, 18 Sep - Mon, 22 Sep
 Logo
07:00 - 08:40DUB-SOU
1h 40mdirect
 Logo
08:05 - 12:25SOU-DUB
4h 20m1 stop
Tue, 9 Sep - Thu, 11 Sep
 Logo
21:00 - 08:30DUB-SOU
11h 30m1 stop
 Logo
20:00 - 21:35SOU-DUB
1h 35mdirect
Thu, 14 Aug - Mon, 18 Aug
KLM Logo
20:45 - 08:45DUB-SOU
12h 00m1 stop
KLM Logo
18:25 - 22:25SOU-DUB
4h 00m1 stop
£199KLM
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Fri, 15 Aug - Tue, 19 Aug
KLM Logo
20:45 - 08:45DUB-SOU
12h 00m1 stop
KLM Logo
18:25 - 22:25SOU-DUB
4h 00m1 stop
£202KLM
Find Deal
Fri, 17 Oct - Sun, 19 Oct
British Airways Logo
17:50 - 19:30DUB-SOU
1h 40mdirect
British Airways Logo
09:10 - 10:50SOU-DUB
1h 40mdirect
£234British Airways
Find Deal
Fri, 5 Sep - Tue, 9 Sep
British Airways Logo
07:00 - 08:40DUB-SOU
1h 40mdirect
British Airways Logo
09:10 - 10:50SOU-DUB
1h 40mdirect
£236British Airways
Find Deal
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Good to know - Cheap tickets from Ireland to Portsmouth

Low seasonFebruary
Cheapest flight£42
Best time to beat the crowds (10% less expensive on average)
Most popular time to fly (40% more expensive on average)
Flight from Dublin to Southampton

FAQs - booking Portsmouth flights

  • How long is the flight to Portsmouth?

    Flights from Dublin1h 39m
  • How to fly to Portsmouth?

    You cannot fly directly to Portsmouth. KAYAK recommends you fly to Southampton Eastleigh (SOU) (14.67 miles from Portsmouth). From there you can hire a car or take a taxi.

  • What airports are near Portsmouth?

    The closest airport is Southampton Eastleigh (SOU) (14.67 mi). Other nearby airports are Bournemouth (BOH) (32.95 mi), London Gatwick (LGW) (45.91 mi), London Heathrow (LHR) (52.65 mi) or London All airports (LON) (63.13 mi). KAYAK recommends you fly to Southampton Eastleigh.

  • How far is Southampton Eastleigh Airport from central Southampton?

    The city centre of Southampton is 3 miles from Southampton.

  • What is the name of Southampton’s airport?

    There is only 1 airport in Southampton, called Southampton Eastleigh Airport (SOU). It can also be referred to as Eastleigh or Southampton.

  • How does KAYAK find such low prices on flights to Portsmouth?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights to Portsmouth.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket to Portsmouth?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Portsmouth is likely to change within 7 days, so travellers know whether to wait or book now.

  • What is the Hacker Fare option on flights to Portsmouth?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Portsmouth with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight to Portsmouth?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Portsmouth up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Top tips for finding cheap flights to Portsmouth

  • There is no major airport in Portsmouth,it is instead served by London's airports. We recommend you fly to London Heathrow Airport Airport, however you can also fly to London Gatwick Airport airport, London City Airport airport, London Luton Airport airport, London Stansted Airport airport or London Southend Airport airport.
  • Looking for cheap airfare to Portsmouth? 25% of our users found round-trip tickets to Portsmouth for the following prices or less: Cheap flights to Portsmouth from Dublin £92
  • Enter your preferred departure airport and travel dates into the search form above to unlock the latest Portsmouth flight deals.

Reviews of the top airline flying from Ireland to Portsmouth

 
Need help choosing which airline to fly with from Ireland to Portsmouth? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.1
Aer LingusOverall score based on 1192 reviews
7.1Comfort
7.3Boarding
6.4Food
8.0Crew
6.8Entertainment
Airline reviews

Delightful flight, ahead of time with a super crew, thanks

10.0 ExcellentAnonymous, Jul 2025ORK - FAO
Read more Aer Lingus reviews

Delightful flight, ahead of time with a super crew, thanks

I wish Aer Lingus offered free wifi and had power outlets at the seats. Overall, the flight was good. Seat back entertainment had some interesting options. Food and snack options were mediocre at best. I enjoyed the canned red wine.

In business class overhead bins were minuscule. Had to use cabin staff to find a place for my carry-on bag. Boarding process was shambolic, as “passengers who needed assistance in boarding” absorbed an excessive amount of time and attention that Aer Lingus was apparently unprepared for.

Aer Lingus was fabulous.nhowever, Aiirfare Assist who Kayak routes me to to purchase tickets for m was awful. They messed up my reservation so bad that after about six hours on the phone with them over the week before departure, I had been choice but to show up at the airport. The Aer Lingus staff were amazing and got it sorted out but I would recommend not using Airfare Assist.

I had a great experience. I wasn’t sure what to expect but the crew helped me check my bags and made sure I got in the correct line to board. It was a bit of a walk to my gate so arrive early. I would recommend securing a flight that includes checking in your bag if you remotely think your baggage is over 10kg/22lbs. Be safe and upgrade unless you are carrying a backpack or weekend type baggage.

Dublin to Boston was decent. Food and entertainment was included and that was expected for the rate paid.

No entertained. food and beverages were not complimentary. they lost my checked luggage which made my 10 day vacation unpleasant.

The food was mediocre, the coffee was terrible. The entertaining selection was plentiful. They lost my checked luggage which put a damper on my 10-day vacation.

Flight was on time. Boarding was quick and efficient. Seats were comfortable. Food was fine.

Seats were less comfortable and tight from Newark to Dublin, than my second flight ( small segment from Dublin to Lyon). Movie audio was with frying sound overall. Yet the worst was as follows: one male, (dark hair , glasses on) from the crew member was so cold and rough, while I remained with constancy polite and kind. Per exple with the noise level I could not hear him at first for beverages, he rolled his eyes at the third times I finally heard him. From the start, loading my small hand bags , he directly spoke to me and said “ I had to keep my shopping bad by my seat, under , while there was sufficient room and I was among the last to sit. I show him the space , his face was always dull, stoic, not welcoming as the usual crew members from any airline companies are. When I think of my experience I liard w Aer Lingus, this is the image that gets back to me. Needless to say that as a passenger and client, I felt belittled since all this happened in front of the surrendering passengers. It s an affront and not a pleasant feeling especially when being traveling which oftentimes involves stress with carrying, and making it on time. I m not happy with the experience I had to be honest and I fly four times a year. Thank you for allowing me to share this statement with your company.

Everything you need to know for your flight to Portsmouth

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