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Cheap flights from Portsmouth to Dublin from £44

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/10. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — DUB
31 Aug — 7 Sep1
1 adult

Cheapflights Tip: The best prices from Portsmouth to Dublin are usually found in January or February, booked 68 days in advance, depart on a Thursday or Tuesday and return on a Tuesday

Cheap flight deals from Portsmouth to Dublin

Keep the following information in mind while searching for Portsmouth to Dublin flight deals. Data was last updated 26 August 2025.

Round-trip from

£110

One-way from

£44

Popular in

June

Cheapest in

January

Average price

£159
Aer Lingus
  • Aer Lingus
  • 16/9-18/9
  • Nonstop
  • 3h 15m total
  • Portsmouth to Dublin
Search Deals
Aer Lingus
  • Aer Lingus
  • 9/10
  • Nonstop
  • 1h 35m total
  • Portsmouth to Dublin
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£15 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£3 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 2025
Search Deals

Find flight deals from Portsmouth to Dublin

Cheapest flights from Portsmouth to Dublin
Explore the most affordable flight options available from Portsmouth to Dublin. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 26 August 2025.

Tue 16/920:00SOU - DUB
Nonstop1h 35mAer Lingus
Thu 18/907:00DUB - SOU
Nonstop1h 40mAer Lingus
Deal found 24/8£110
Fri 26/920:15SOU - DUB
1 stop15h 00mMultiple Airlines
Thu 2/1007:00DUB - SOU
Nonstop1h 40mMultiple Airlines
Deal found 26/8£111
Fri 14/1120:10SOU - DUB
Nonstop1h 40mAer Lingus
Sun 16/1107:00DUB - SOU
Nonstop1h 45mAer Lingus
Deal found 25/8£113
Sat 20/916:25SOU - DUB
Nonstop1h 35mAer Lingus
Sun 28/906:55DUB - SOU
Nonstop1h 40mAer Lingus
Deal found 24/8£116
Fri 26/920:00SOU - DUB
Nonstop1h 35mAer Lingus
Sun 28/906:55DUB - SOU
Nonstop1h 40mAer Lingus
Deal found 24/8£116
Fri 26/920:00SOU - DUB
Nonstop1h 35mAer Lingus
Tue 30/906:35DUB - SOU
Nonstop1h 40mAer Lingus
Deal found 24/8£118
Thu 9/1020:00SOU - DUB
Nonstop1h 35mMultiple Airlines
Thu 16/1019:55DUB - SOU
1 stop23h 00mMultiple Airlines
Deal found 25/8£119
Wed 8/1009:00SOU - DUB
1 stop8h 15mMultiple Airlines
Wed 15/1006:25DUB - SOU
Nonstop1h 40mMultiple Airlines
Deal found 24/8£120
Mon 15/917:15SOU - DUB
Nonstop1h 35mAer Lingus
Wed 17/906:25DUB - SOU
Nonstop1h 40mAer Lingus
Deal found 25/8£121
Mon 22/908:05SOU - DUB
1 stop11h 55mMultiple Airlines
Sun 29/306:55DUB - SOU
Nonstop1h 40mMultiple Airlines
Deal found 25/8£122
Wed 8/1009:10SOU - DUB
Nonstop1h 40mAer Lingus
Wed 8/1017:50DUB - SOU
Nonstop1h 40mAer Lingus
Deal found 24/8£123

Cheapflights Fare Finder

 
Customise your flight search to find flights from Portsmouth to Dublin that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 26 August 2025.
Use the filters below to find and compare flights from Portsmouth to Dublin that are best for you.

Fly from

Portsmouth

Fly to

Dublin

Route

Depart

Return

Price

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

Tue 16/9

20:00-21:35

Nonstop1h 35m

Dublin

Thu 18/9

07:00-08:40

Nonstop1h 40m

£110

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

Fri 14/11

20:10-21:50

Nonstop1h 40m

Dublin

Sun 16/11

07:00-08:45

Nonstop1h 45m

£113

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

Fri 10/10

20:00-21:35

Nonstop1h 35m

Dublin

Tue 14/10

21:00-08:30

1 stop11h 30m

£116

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

Sat 20/9

16:25-18:00

Nonstop1h 35m

Dublin

Sun 28/9

06:55-08:35

Nonstop1h 40m

£116

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

Fri 26/9

20:00-21:35

Nonstop1h 35m

Dublin

Sun 28/9

06:55-08:35

Nonstop1h 40m

£116

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

Fri 26/9

20:00-21:35

Nonstop1h 35m

Dublin

Tue 30/9

06:35-08:15

Nonstop1h 40m

£118

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

Wed 15/10

09:10-10:50

Nonstop1h 40m

Dublin

Wed 15/10

21:50-12:45

2 stops14h 55m

£119

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

Thu 9/10

20:00-21:35

Nonstop1h 35m

Dublin

Thu 16/10

19:55-18:55

1 stop23h 00m

£119

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

Thu 9/10

20:00-21:35

Nonstop1h 35m

£44

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

Fri 10/10

20:00-21:35

Nonstop1h 35m

£45

Flights are sorted by cheapest return flights first.

Deals found on 25/8

Showing 1-10 of 18 results
1
2

Best time to book a flight from Portsmouth to Dublin

Have a flexible travel schedule? Discover the best time to fly to Dublin from Portsmouth with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

How far ahead should I book a flight from Portsmouth to Dublin?

Use this chart to determine the optimal time to book a return flight from Portsmouth to Dublin. Price data was last updated on 22 August 2025.

The best time to book flights from Portsmouth to Dublin is 68 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Portsmouth to Dublin?

Currently, January is the cheapest month in which you can book a flight from Portsmouth to Dublin (average of £71). Flying from Portsmouth to Dublin in August is currently the most expensive (average of £94). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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

Find hourly flight availability from Portsmouth to Dublin. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 26 August 2025.

When flying from Portsmouth to Dublin, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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

Use this chart to determine the cheapest time to fly return from Portsmouth to Dublin. Price data was last updated on 16 December 2024.

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

Weekly flight availability from Portsmouth to Dublin

Explore weekly flight availability from Portsmouth to Dublin. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 26 August 2025.

The most flights from P0R to DUB are scheduled on a Monday (69 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (46 on average).

Reviews of airlines servicing Dublin

Get insights into the airlines that provide service to Dublin. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Dublin. Reviews last updated 26 August 2025.
Read reviews from past customers who have flown with KLM, Aer Lingus, andRyanair 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.
KLM
7.8
Good
1,387 reviews
Check prices

Overall

7.8

Boarding

7.8

Comfort

7.7

Crew

8.4

Entertainment

7.1

Food

7.3

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
KLM
7.8
Good
1,387 reviews
KLM
7.8
Good
1,387 reviews
Check prices

Overall

7.8

Boarding

7.8

Comfort

7.7

Crew

8.4

Entertainment

7.1

Food

7.3

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
Aer Lingus
7.2
Good
1,237 reviews
KLM
7.8
Good
1,387 reviews
Check prices

Overall

7.8

Boarding

7.8

Comfort

7.7

Crew

8.4

Entertainment

7.1

Food

7.3

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
Ryanair
6.8
Okay
5,152 reviews
KLM
7.8
Good
1,387 reviews
Check prices

Overall

7.8

Boarding

7.8

Comfort

7.7

Crew

8.4

Entertainment

7.1

Food

7.3

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
British Airways
6.7
Okay
7,309 reviews
KLM
7.8
Good
1,387 reviews
Check prices

Overall

7.8

Boarding

7.8

Comfort

7.7

Crew

8.4

Entertainment

7.1

Food

7.3

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

Related info for your journey

Find useful and relevant information for your journey from Portsmouth to Dublin. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • 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 5 flights from Portsmouth to Dublin per day from 4 different airlines.

  • How long is the flight from Portsmouth to Dublin?

    There are many flights that can get you from Portsmouth to Dublin in 1h 35m. Fly via Aer Lingus to get the fastest option. Airlines will cover a distance of 268 mi. Most flights are nonstop.

  • 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 (85%), LATAM Airlines (79%), Qatar Airways (77%).

  • What are the cheapest flights from Portsmouth to Dublin?

    Looking at all options, your cheapest flight can be booked for £68. While the most popular route (Southampton Eastleigh - Dublin) can be booked for £79 on average our data indicates £564 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.

  • What is the cheapest month to book a flight from Portsmouth to Dublin?

    Currently, January is the cheapest month in which you can book a flight from Portsmouth to Dublin (average of £71). Flying from Portsmouth to Dublin in August is currently the most expensive (average of £94). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near Dublin?

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

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Portsmouth to Dublin

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Top 4 airlines flying from Portsmouth to Dublin

Discover the top 4 airlines that operate flights from Portsmouth to Dublin. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 26 August 2025.
AirlineCheapestAverageFlexibilityOn-time
RyanairCheapest£25Average£82FlexibilityNo cancel feeOn-timeN/A
Search Ryanair flights
Aer LingusCheapest£60Average£176FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
British AirwaysCheapest£65Average£143FlexibilityNo cancel feeOn-time70%
Search British Airways flights
KLMCheapest£125Average£160FlexibilityNo cancel feeOn-time75%
Search KLM flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Portsmouth to Dublin?

Cheapflights makes it easy to find Portsmouth to Dublin flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Portsmouth to Dublin?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Portsmouth to Dublin.

Can Cheapflights find flights from Portsmouth to Dublin with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Portsmouth to Dublin flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Portsmouth to Dublin become cheaper?

Of course! You can now track prices for flights from Portsmouth to Dublin and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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