£46 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 13/7. 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

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Everything you should know

Cheapest return fare
£64
Typical prices: £257-£136
Aer Lingus
Mon 1/6Mon 8/6
DUB - SOU • Direct
Cheapest direct flights
£64
Typical prices: £263-£142
Aer Lingus
Thu 4/6Mon 8/6
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.
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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

Mon, 1 Jun - Mon, 8 Jun
Aer Lingus Logo
07:00 - 08:40
DUB
-
SOU
1h 40mdirect
Aer Lingus Logo
17:20 - 18:55
SOU
-
DUB
1h 35mdirect
£64Aer Lingus
Thu, 4 Jun - Mon, 8 Jun
Aer Lingus Logo
07:00 - 08:40
DUB
-
SOU
1h 40mdirect
Aer Lingus Logo
20:00 - 21:35
SOU
-
DUB
1h 35mdirect
£64Aer Lingus
Tue, 2 Jun - Wed, 10 Jun
Aer Lingus Logo
17:50 - 19:30
DUB
-
SOU
1h 40mdirect
Aer Lingus Logo
20:00 - 21:35
SOU
-
DUB
1h 35mdirect
£66Aer Lingus
Mon, 1 Jun - Thu, 4 Jun
Aer Lingus Logo
07:00 - 08:40
DUB
-
SOU
1h 40mdirect
Aer Lingus Logo
20:00 - 21:35
SOU
-
DUB
1h 35mdirect
£67Aer Lingus
Tue, 2 Jun - Tue, 2 Jun
Aer Lingus Logo
07:00 - 08:40
DUB
-
SOU
1h 40mdirect
Aer Lingus Logo
20:00 - 21:35
SOU
-
DUB
1h 35mdirect
£69Aer Lingus
Sat, 23 May - Mon, 25 May
Aer Lingus Logo
17:50 - 19:30
DUB
-
SOU
1h 40mdirect
Aer Lingus Logo
20:00 - 21:35
SOU
-
DUB
1h 35mdirect
£70Aer Lingus
Fri, 12 Jun - Sun, 14 Jun
Aer Lingus Logo
17:50 - 19:30
DUB
-
SOU
1h 40mdirect
Aer Lingus Logo
20:00 - 21:35
SOU
-
DUB
1h 35mdirect
£92Aer Lingus
Tue, 2 Jun - Tue, 2 Jun
Multiple Airlines Logo
07:00 - 08:40
DUB
-
SOU
1h 40mdirect
Multiple Airlines Logo
13:25 - 21:40
SOU
-
DUB
8h 15m
1 stop
£96Multiple Airlines
Sat, 23 May - Mon, 25 May
Multiple Airlines Logo
17:50 - 19:30
DUB
-
SOU
1h 40mdirect
Multiple Airlines Logo
20:40 - 09:10
SOU
-
DUB
12h 30m
1 stop
£98Multiple Airlines
Wed, 24 Jun - Wed, 1 Jul
Aer Lingus Logo
17:50 - 19:30
DUB
-
SOU
1h 40mdirect
Aer Lingus Logo
09:20 - 11:00
SOU
-
DUB
1h 40mdirect
£98Aer Lingus
Useful Info

Good to know - Cheap tickets from Dublin to Portsmouth

Low seasonJanuary
Cheapest flight£46
Best time to beat the crowds (7% less expensive on average)
Most popular time to fly (29% 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 35m.

  • How many flights are there between Dublin and Portsmouth?

    7 direct flights run between Dublin and Portsmouth on a daily basis. On average, there are about 49 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 23 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.
7.3
Aer LingusOverall score based on 1556 reviews
8.1Crew
7.0Entertainment
7.2Comfort
7.4Boarding
6.6Food
Airline reviews

I sat in the first row behind first class. There was plenty of legroom. The entertainment was great. I saw two excellent movies and one episode of a sitcom. Also enjoyed the flight tracker.

10.0 ExcellentAnthon, Apr 2026
DUB - BOS
Read more Aer Lingus reviews

I sat in the first row behind first class. There was plenty of legroom. The entertainment was great. I saw two excellent movies and one episode of a sitcom. Also enjoyed the flight tracker.

On time, only a little turbulence, very competent and caring attendants. Clear information.

The flights are literally always delayed arriving, boarding and taking off so they are always late for the connection. I planned ahead so I was okay but many others aren't. The food was terrible. The staff was very pleasant. I appreciate boarding back to front.

On a four hour delayed flight now on seats back end of the plane instead front-

My issue is with the SkyWest terminal. The flight was not listed on the main airport flight screen list, and I had to do a Google search to locate the terminal and gate. We had to ask several airport employees where to locate the phantom gate. The airport did not provide adequate signage and was confusing. When we arrived, there was one vendor providing services that quickly closed, leaving zero options for food and drink while we waited hours for our delayed flight. The crew that assisted with check-in and boarding was VERY friendly.

Checked in ok for 3 flights at the airport check-in desk, but apparently I was not checked in to my connecting flights even though I was assured that I was and had seats on all 3 flights. Aer Lingus departure was also delayed for 1.5 hours which gave no time to collect bags to go through customs.

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!

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

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