£39 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 19/3. 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
£84
Overall average: £104
Aer Lingus
Mon 9/2Mon 16/2
DUB - SOU • Direct
Cheapest one-way flight
£39
Typical prices: £38-£102
Aer Lingus
Thu 19/3
DUB - SOU • Direct
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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

Mon, 9 Feb - Mon, 16 Feb
Aer Lingus Logo
07:00 - 08:45
DUB
-
SOU
1h 45mdirect
Aer Lingus Logo
16:05 - 17:40
SOU
-
DUB
1h 35mdirect
£84Aer Lingus
Mon, 9 Feb - Mon, 16 Feb
Aer Lingus Logo
07:00 - 08:45
DUB
-
SOU
1h 45mdirect
Aer Lingus Logo
16:05 - 17:40
SOU
-
DUB
1h 35mdirect
£87Aer Lingus
Thu, 12 Feb - Mon, 16 Feb
Aer Lingus Logo
07:00 - 08:45
DUB
-
SOU
1h 45mdirect
Aer Lingus Logo
20:10 - 21:50
SOU
-
DUB
1h 40mdirect
£87Aer Lingus
Thu, 8 Jan - Mon, 12 Jan
Aer Lingus Logo
07:00 - 08:45
DUB
-
SOU
1h 45mdirect
Aer Lingus Logo
20:10 - 21:50
SOU
-
DUB
1h 40mdirect
£88Aer Lingus
Fri, 13 Feb - Sun, 15 Feb
Aer Lingus Logo
07:00 - 08:45
DUB
-
SOU
1h 45mdirect
Aer Lingus Logo
20:10 - 21:50
SOU
-
DUB
1h 40mdirect
£90Aer Lingus
Mon, 9 Feb - Mon, 16 Feb
Multiple Airlines Logo
13:10 - 08:50
DUB
-
SOU
19h 40m1 stop
Multiple Airlines Logo
20:10 - 21:50
SOU
-
DUB
1h 40mdirect
£108Multiple Airlines
Sat, 24 Jan - Sat, 31 Jan
Multiple Airlines Logo
07:00 - 08:45
DUB
-
SOU
1h 45mdirect
Multiple Airlines Logo
15:20 - 07:45
SOU
-
DUB
16h 25m1 stop
£113Multiple Airlines
Mon, 9 Feb - Mon, 16 Feb
Multiple Airlines Logo
19:05 - 08:50
DUB
-
SOU
13h 45m1 stop
Multiple Airlines Logo
17:45 - 21:30
SOU
-
DUB
3h 45m1 stop
£116Multiple Airlines
Thu, 8 Jan - Mon, 12 Jan
Multiple Airlines Logo
07:00 - 08:45
DUB
-
SOU
1h 45mdirect
Multiple Airlines Logo
12:05 - 21:30
SOU
-
DUB
9h 25m1 stop
£118Multiple Airlines
Thu, 12 Feb - Mon, 16 Feb
Multiple Airlines Logo
07:00 - 08:45
DUB
-
SOU
1h 45mdirect
Multiple Airlines Logo
17:45 - 21:30
SOU
-
DUB
3h 45m1 stop
£121Multiple Airlines
Useful Info

Good to know - Cheap tickets from Dublin to Portsmouth

Low seasonOctober
Cheapest flight£39
Best time to beat the crowds (9% less expensive on average)
Most popular time to fly (32% 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 47 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 19 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 January.

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 1412 reviews
7.4Boarding
6.6Food
7.1Comfort
8.0Crew
6.9Entertainment
Airline reviews

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

2.0 MediocreSvetlana, Dec 2025
DUB - IAD
Read more Aer Lingus reviews

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

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

One of the best flights I've been on in a while. Very genuinely friendly staff. Courteous, kind, respectful. On a past flight (not Aer Lingus) I remember being woken up rudely to put my seat forward. Like a child being berated for something. Oddly jarring experience when someone could just tap you gently on the shoulder and gesture kindly. But I noticed the Aer Lingus staff were incredibly patient with everyone on the plane. It's the holiday season and I noticed a lot more elderly customers on the plane than I typically see flying, and the staff went above and beyond with helping accommodate people. Service throughout the flight was flawless. They came through offering water, and picking up garbage at perfect intervals. Seemed like this flight, everyone was on point. And the flight landed early on top of that

Seats are small, but comfortable and more space around you, so for a normal person the seats are perfect. If you are a big and fat individual, I would not think the seats are comfortable. All else was good and normal. Lots of movies to watch.

Customer service was excellent! The app was terrible, tried several times to check in without success! But the young lady that checked us in was absolutely terrific and helpful.

The same as I stated prior. We incurred extra costs that should be reimbursed, given we were not communicated with about schedule changes.

Experience was great overall. However, the connection time between my flights (1hr 15 mins) was too short. We had to get through security check and US immigration in that time, and I made it to the gate just as they were announcing it was about to close. Flights with such a short connection time should maybe not be offered for purchase, or an advance alert would be helpful. Other than that the in-flight experience was excellent, especially the food. Many thanks!

The seats needs to be comfortables, at least please add more padding to the seats.

Incredible service. Incredible entertainment. I felt like they just kept serving us something new avery hour. My wife and I both had a joyous flight.

They out me in the baby row so I was surrounded by toddlers, they also did not send my luggage and was not able to book my connecting flight

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

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