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Cheap flights from Portsmouth to Dublin

LHR — DUB
16 Nov — 23 Nov1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Portsmouth to Dublin are usually found in January or February, booked 72 days in advance, depart on a Tuesday or Sunday and return on a Tuesday

Find flight deals from Portsmouth to Dublin

Popular in

June

Cheapest in

January

Average price

£140
Highest demand for flights based on searches. 13% potential increase in price (£17 potential increase over avg. return price).
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Cheapest flight prices on average. 2% potential price decrease (£4 potential savings vs. average return price).
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Average for round-trip flights in October 2026
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Cheapflights Insights

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

What is the cheapest time of day to fly from P0R to DUB?

A simple way to save on the total cost of your ticket is to fly from Portsmouth to Dublin in the afternoon. If you’re flexible enough to do this you can expect to save up to 39% on your trip compared to booking a flight in the morning.

What is the cheapest day to fly from Portsmouth to Dublin?

Travellers seeking maximum savings on their Portsmouth to Dublin flight should consider departing on Tuesday evenings when fares are most often at their lowest. Sunday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Dublin

Read reviews from past customers who have flown with Aer Lingus and British Airways from Portsmouth to Dublin. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Aer Lingus
7.3
Good
1,842 reviews
Check prices

Entertainment

7.0

Crew

8.1

Overall

7.3

Comfort

7.2

Boarding

7.5

Food

6.7

Reviews

1 / 20
10.0
Excellent

Patrick,Sept 2026

CDG - DUB

Flight crew were very nice and friendly and very professional. I enjoyed my flights.
Aer Lingus
7.3
Good
1,842 reviews
Aer Lingus
7.3
Good
1,842 reviews
Check prices

Entertainment

7.0

Crew

8.1

Overall

7.3

Comfort

7.2

Boarding

7.5

Food

6.7

Reviews

1 / 20
10.0
Excellent

Patrick,Sept 2026

CDG - DUB

Flight crew were very nice and friendly and very professional. I enjoyed my flights.
British Airways
6.7
Okay
8,264 reviews
Aer Lingus
7.3
Good
1,842 reviews
Check prices

Entertainment

7.0

Crew

8.1

Overall

7.3

Comfort

7.2

Boarding

7.5

Food

6.7

Reviews

1 / 20
10.0
Excellent

Patrick,Sept 2026

CDG - DUB

Flight crew were very nice and friendly and very professional. I enjoyed my flights.

Related info for your journey

  • What airport do you fly into for flights to Dublin from Portsmouth?

    If you book a flight to Dublin from Portsmouth, you will be flying to Dublin, which is the city’s only airport. Dublin (DUB) is located 5.7 mi from the center of Dublin. There are 6 flights from Portsmouth to Dublin per day from 3 different airlines.

  • What are the most reliable airlines from Portsmouth to Dublin?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Portsmouth to Dublin on time: Air Canada (86%), Qatar Airways (79%), Aer Lingus (78%).

  • What are the cheapest flights from Portsmouth to Dublin?

    Looking at all options, your cheapest flight can be booked for £54. While the most popular route (Southampton Eastleigh - Dublin) can be booked for £104 on average, our data indicates £470 when flying from Portsmouth to Dublin.

  • Can I find deals for flights from Portsmouth to Dublin that include hotel bookings?

    Yes. In addition to deals on Portsmouth to Dublin flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Portsmouth to Dublin?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portsmouth to Dublin.

  • Can I find deals for business class flights from Portsmouth to Dublin?

    Yes. Cheapflights offers flight deals from Portsmouth to Dublin by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Travelling to a place near Dublin?

Book flights to Dublin if you plan to visit one of these locations
Arklow
Cavan
Swords
Portmarnock
Wicklow
Athlone
Bray
Dundalk
Malahide
Maynooth
Drogheda
Kildare

Browse thousands of different options on Cheapflights for your next trip

Top 3 airlines flying from Portsmouth to Dublin

AirlineCheapestAverageFlexibilityOn-time
RyanairCheapest£32Average£70FlexibilityNo cancel feeOn-timeN/A
Search Ryanair flights
British AirwaysCheapest£70Average£175FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Aer LingusCheapest£97Average£144FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights

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