£48 Find Cheap Flights from Dublin 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 from Dublin to Portsmouth departing on 5/5. 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, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights from Dublin to Portsmouth

Travellers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 27% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Free to useThere are no hidden charges or fees.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Everything you should know

Cheapest return fare
£94
Typical prices: £181-£114
Aer Lingus
Thu 14/5Thu 21/5
DUB - SOU • Direct
Cheapest one-way flight
£48
Typical prices: £39-£135
Aer Lingus
Tue 5/5
DUB - SOU • Direct
Arrival airport
Southampton (SOU)
You can’t fly directly to Portsmouth. It is served by Southampton (SOU), located 14.7 miles from Portsmouth.
FAQs
FAQs
FAQs
FAQs
Start a new search
KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you love your trip to Portsmouth!
Flight Deals
Useful Info
Flight Deals

Cheap Flights from Dublin to Portsmouth (DUB-SOU)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Dublin 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 Dublin to Portsmouth

Thu, 14 May - Thu, 21 May
Aer Lingus Logo
17:50 - 19:30
DUB
-
SOU
1h 40mdirect
Aer Lingus Logo
17:20 - 18:55
SOU
-
DUB
1h 35mdirect
£94Aer Lingus
Thu, 14 May - Thu, 21 May
Aer Lingus Logo
17:50 - 19:30
DUB
-
SOU
1h 40mdirect
Aer Lingus Logo
09:20 - 11:00
SOU
-
DUB
1h 40mdirect
£96Aer Lingus
Fri, 8 May - Sat, 16 May
Aer Lingus Logo
17:50 - 19:30
DUB
-
SOU
1h 40mdirect
Aer Lingus Logo
20:00 - 21:35
SOU
-
DUB
1h 35mdirect
£98Aer Lingus
Sat, 16 May - Sat, 23 May
Aer Lingus Logo
17:50 - 19:30
DUB
-
SOU
1h 40mdirect
Aer Lingus Logo
20:00 - 21:35
SOU
-
DUB
1h 35mdirect
£98Aer Lingus
Mon, 11 May - Mon, 18 May
Aer Lingus Logo
15:10 - 16:50
DUB
-
SOU
1h 40mdirect
Aer Lingus Logo
17:20 - 18:55
SOU
-
DUB
1h 35mdirect
£99Aer Lingus
Fri, 1 May - Sun, 3 May
Aer Lingus Logo
07:00 - 08:40
DUB
-
SOU
1h 40mdirect
Aer Lingus Logo
09:20 - 11:00
SOU
-
DUB
1h 40mdirect
£101Aer Lingus
Thu, 23 Apr - Sun, 26 Apr
Aer Lingus Logo
07:00 - 08:40
DUB
-
SOU
1h 40mdirect
Aer Lingus Logo
09:20 - 11:00
SOU
-
DUB
1h 40mdirect
£102Aer Lingus
Thu, 14 May - Thu, 14 May
Aer Lingus Logo
07:00 - 08:40
DUB
-
SOU
1h 40mdirect
Aer Lingus Logo
17:20 - 18:55
SOU
-
DUB
1h 35mdirect
£103Aer Lingus
Fri, 24 Apr - Fri, 1 May
Aer Lingus Logo
07:00 - 08:40
DUB
-
SOU
1h 40mdirect
Aer Lingus Logo
17:20 - 18:55
SOU
-
DUB
1h 35mdirect
£104Aer Lingus
Fri, 1 May - Mon, 4 May
Aer Lingus Logo
17:50 - 19:30
DUB
-
SOU
1h 40mdirect
Aer Lingus Logo
20:00 - 21:35
SOU
-
DUB
1h 35mdirect
£107Aer Lingus
Useful Info

Good to know - Cheap tickets from Dublin to Portsmouth

Low seasonJanuary
Cheapest flight£48
Best time to beat the crowds (6% less expensive on average)
Most popular time to fly (25% more expensive on average)
Flight from Dublin to Southampton

When to book flights from Dublin to Portsmouth

Are your dates flexible? Find out the best times to travel from Dublin to Portsmouth based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price

FAQs for booking flights from Dublin to Portsmouth

  • Which airports will I be using when flying from Dublin to Portsmouth?

    When flying out of Dublin you’ll be using Dublin. Portsmouth does not have its own airport so you’ll be flying into nearby Southampton Eastleigh airport, which is 14.7 mi away.

  • How long does a flight from Dublin to Portsmouth take?

    Direct flights cover the 268 miles separating Dublin and Portsmouth in about 1h 40m.

  • How many flights are there between Dublin and Portsmouth?

    6 direct flights run between Dublin and Portsmouth on a daily basis. On average, there are about 45 departures each week.

  • What’s the cheapest day of the week to fly between Dublin and Portsmouth?

    Consider leaving on a Wednesday and avoid Fridays if you're looking for the best rates. For your return to Dublin, you’ll find the best rates on Mondays and the most expensive ones on Fridays.

  • How does KAYAK find such low prices on flights from Dublin 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 from Dublin to Portsmouth.

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

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

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

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

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

  • There is no airport in Portsmouth. Instead, you’ll be flying into Southampton Airport when flying between Dublin and Portsmouth.
  • The cheapest flight from Dublin to Portsmouth was found 4 days before departure, on average.
  • Book at least 1 week before departure in order to get a below-average price.
  • High season is considered to be May, June and July. The cheapest month to fly is February.

Reviews of the top airline flying from Dublin to Portsmouth

 
Need help choosing which airline to fly with from Dublin 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.
7.2
Aer LingusOverall score based on 1494 reviews
8.1Crew
7.0Entertainment
7.4Boarding
7.2Comfort
6.6Food
Airline reviews

No complimentary drinks or snacks offered on a 2 hour flight was disappointing but everything else went well

8.0 ExcellentBrittany, Mar 2026
DUB - LAX
Read more Aer Lingus reviews

No complimentary drinks or snacks offered on a 2 hour flight was disappointing but everything else went well

All aspects were excellent - it helped that the flight was only 2/3 full and I had no one sitting in my row. The Pre-check (US Passport Control and Customs) in Dublin made everything so easy when we arrived in Chicago.

I love the direct flights. It saves a lot of hassle and allows immigration and customs in Ireland, making arrival much easier.

Great. Has a problem with DOB. Fixed 4 us. Led to a 5 hour earlier flight to London!

One of the best flight experiences I've have had in along time. Would fly with them again.

So, the trip from Dublin to LA did not really happen because the flight took off before we could finish the transfer.

Very nice experience. Flight had good entertainment system and good food options. Customer service was very friendly and nice as well.

Like - the crew were nice Dislike - sitting on the tarmac for long periods after boarding and landing.

I was not admitted to the flight!!! i need a refund for this.

It’s my new favourite airline! Everything was smooth and relaxed!

Everything you need to know for your flight from Dublin to Portsmouth

Complete your trip to Portsmouth with a hotel stay or car hire

Car hire in Portsmouth
Hotels in Portsmouth
Holidays in Portsmouth