£44 Find Cheap Flights from Dublin to Portsmouth – Compare and Save

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 30/9. 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
£90
Typical prices: £125-£158
Aer Lingus
Wed 5/8Wed 12/8
DUB - SOU • Direct
Cheapest one-way flight
£44
Typical prices: £44-£112
Aer Lingus
Wed 30/9
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

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

Wed, 5 Aug - Wed, 12 Aug
Aer Lingus Logo
06:25 - 08:05
DUB
-
SOU
1h 40mdirect
Aer Lingus Logo
09:20 - 11:00
SOU
-
DUB
1h 40mdirect
£90Aer Lingus
Wed, 22 Jul - Wed, 29 Jul
Aer Lingus Logo
06:25 - 08:05
DUB
-
SOU
1h 40mdirect
Aer Lingus Logo
20:00 - 21:35
SOU
-
DUB
1h 35mdirect
£95Aer Lingus
Tue, 4 Aug - Sun, 30 Aug
Aer Lingus Logo
17:50 - 19:30
DUB
-
SOU
1h 40mdirect
Aer Lingus Logo
17:20 - 18:55
SOU
-
DUB
1h 35mdirect
£96Aer Lingus
Sun, 9 Aug - Sun, 30 Aug
Aer Lingus Logo
06:55 - 08:35
DUB
-
SOU
1h 40mdirect
Aer Lingus Logo
17:20 - 18:55
SOU
-
DUB
1h 35mdirect
£97Aer Lingus
Thu, 13 Aug - Fri, 14 Aug
Aer Lingus Logo
17:50 - 19:30
DUB
-
SOU
1h 40mdirect
Aer Lingus Logo
20:00 - 21:35
SOU
-
DUB
1h 35mdirect
£98Aer Lingus
Thu, 13 Aug - Mon, 17 Aug
Aer Lingus Logo
07:00 - 08:40
DUB
-
SOU
1h 40mdirect
Aer Lingus Logo
20:00 - 21:35
SOU
-
DUB
1h 35mdirect
£98Aer Lingus
Mon, 17 Aug - Mon, 24 Aug
Aer Lingus Logo
17:50 - 19:30
DUB
-
SOU
1h 40mdirect
Aer Lingus Logo
20:00 - 21:35
SOU
-
DUB
1h 35mdirect
£99Aer Lingus
Thu, 23 Jul - Sun, 26 Jul
Aer Lingus Logo
07:00 - 08:40
DUB
-
SOU
1h 40mdirect
Aer Lingus Logo
09:20 - 11:00
SOU
-
DUB
1h 40mdirect
£100Aer Lingus
Thu, 23 Jul - Sun, 26 Jul
Aer Lingus Logo
07:00 - 08:40
DUB
-
SOU
1h 40mdirect
Aer Lingus Logo
09:20 - 11:00
SOU
-
DUB
1h 40mdirect
£101Aer Lingus
Tue, 18 Aug - Fri, 21 Aug
Aer Lingus Logo
07:00 - 08:40
DUB
-
SOU
1h 40mdirect
Aer Lingus Logo
20:00 - 21:35
SOU
-
DUB
1h 35mdirect
£101Aer Lingus
Useful Info

Good to know - Cheap tickets from Dublin to Portsmouth

Low seasonJanuary
Cheapest flight£44
Most popular time to fly (24% 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 42 departures each week.

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

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

  • 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 26 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 June, July and August. 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 1653 reviews
7.4Boarding
8.1Crew
7.2Comfort
7.0Entertainment
6.6Food
Airline reviews

The service was some of the worst I have experienced on an international flight. The service was rude, the quality of the food was very low. The speed of service was insanely quick. You couldn’t finish your pretzels before the meal came before the coffee came before trash collection came. Then they never came back for 5 hours. They rushed everything so they could get it over with.

4.0 OkayAnonymous, Jul 2026
DUB - BNA
Read more Aer Lingus reviews

The service was some of the worst I have experienced on an international flight. The service was rude, the quality of the food was very low. The speed of service was insanely quick. You couldn’t finish your pretzels before the meal came before the coffee came before trash collection came. Then they never came back for 5 hours. They rushed everything so they could get it over with.

A special shout-out to one of the check-in staff at DUB yesterday noon. We had to use the "Closing Flights" counter and we met, hands down, the most efficient person - able to resolve several issues in the matter of minutes, while remaining polite and calming everyone down. Great job, Aer Lingus!

Air Lingus was in no hurry to get us on the plane as sat at the gate a long time before they boarded us. Then they leave us on the tarmac for an hour. They were no help to let me know what I needed to do to get home. I had to navigate London Heathrow with 0 help from them.

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

My flights with Aer Lingus were very good and I will definitely fly with them. Again in future trips to Ireland and Scotland.

At check-in the unmanned machines said QR code was invalid so had to queue for over an hour to check in bags

Short flight so not much to rate. Surprised I had to pay for a soda.

Very good need to offer better choice of food for business

Always find Aer Lingus reliable and good value for money. Food on this flight was pretty basic and the headphone Jack at my seat only worked for one ear. Little disappointed in movie selection, limited on recent releases. Staff are okay - but I always buy a cheap ticket so not like I expect first class opulence anyway!!!

Air Lingus flights were delayed on each of the three flights we took. Not a very good , and organized airline.

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

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