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Cheap flights from Portsmouth to Ireland 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 23/10. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — DUB
20 Aug — 27 Aug1
1 adult

Cheap flight deals from Portsmouth to Ireland

Keep the following information in mind while searching for Portsmouth to Ireland flight deals. Data was last updated 15 August 2025.

Round-trip from

£121

One-way from

£44

Popular in

December

Cheapest in

January

Average price

£77
20/10-22/10
  • 20/10-22/10
  • 2 total stops
  • 17h 20m total
  • Portsmouth to Ireland
Search Deals
Aer Lingus
  • Aer Lingus
  • 23/10
  • Nonstop
  • 1h 35m total
  • Portsmouth to Ireland
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (£4 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 6% 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 Ireland

Cheapest flights from Portsmouth to Ireland
Explore the most affordable flight options available from Portsmouth to Ireland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 August 2025.

Mon 20/1020:00SOU - DUB
Nonstop1h 35mMultiple Airlines
Wed 22/1021:00DUB - SOU
2 stops15h 45mMultiple Airlines
Deal found 14/8£121
Wed 27/820:00SOU - DUB
Nonstop1h 35mAer Lingus
Wed 3/906:25DUB - SOU
Nonstop1h 40mAer Lingus
Deal found 14/8£129
Sat 27/916:25SOU - DUB
Nonstop1h 35mAer Lingus
Sat 4/1014:10DUB - SOU
Nonstop1h 35mAer Lingus
Deal found 13/8£131
Fri 10/1009:40SOU - DUB
Nonstop1h 40mAer Lingus
Sun 12/1006:55DUB - SOU
Nonstop1h 40mAer Lingus
Deal found 13/8£135
Sun 14/909:10SOU - DUB
Nonstop1h 40mAer Lingus
Thu 18/907:00DUB - SOU
Nonstop1h 40mAer Lingus
Deal found 13/8£137
Sun 14/909:20SOU - DUB
1 stop13h 05mMultiple Airlines
Thu 18/907:00DUB - SOU
Nonstop1h 40mMultiple Airlines
Deal found 13/8£139
Thu 25/917:35SOU - DUB
1 stop4h 50mMultiple Airlines
Sun 28/906:55DUB - SOU
Nonstop1h 40mMultiple Airlines
Deal found 13/8£140
Mon 1/920:30SOU - DUB
1 stop11h 25mMultiple Airlines
Tue 9/907:00DUB - SOU
Nonstop1h 40mMultiple Airlines
Deal found 13/8£142
Mon 1/920:00SOU - DUB
Nonstop1h 35mAer Lingus
Mon 8/907:30DUB - SOU
Nonstop1h 40mAer Lingus
Deal found 13/8£144
Sat 27/909:20SOU - ORK
1 stop7h 15mKLM
Sat 4/1017:10ORK - SOU
1 stop15h 35mKLM
Deal found 13/8£157
Wed 10/909:20SOU - ORK
1 stop13h 05mKLM
Wed 17/906:00ORK - SOU
1 stop26h 45mKLM
Deal found 13/8£189
Sat 11/1015:20SOU - ORK
2 stops18h 50mMultiple Airlines
Sat 18/1022:50ORK - SOU
2 stops12h 35mMultiple Airlines
Deal found 13/8£196

Cheapflights Fare Finder

 
Customise your flight search to find flights from Portsmouth to Ireland 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 15 August 2025.
Use the filters below to find and compare flights from Portsmouth to Ireland that are best for you.

Fly from

Portsmouth

Fly to

Ireland

Route

Depart

Return

Price

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

Mon 20/10

20:00-21:35

Nonstop1h 35m

Dublin

Wed 22/10

21:00-12:45

2 stops15h 45m

£121

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

Fri 6/2

20:10-21:50

Nonstop1h 40m

Dublin

Sun 8/2

13:55-15:35

Nonstop1h 40m

£125

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

Mon 29/9

12:10-19:15

1 stop7h 05m

Dublin

Mon 6/10

07:30-09:10

Nonstop1h 40m

£125

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

Tue 9/9

20:00-21:35

Nonstop1h 35m

Dublin

Wed 10/9

06:25-08:05

Nonstop1h 40m

£129

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

Sat 27/9

08:25-16:35

1 stop8h 10m

Dublin

Sat 4/10

14:10-15:45

Nonstop1h 35m

£129

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

Wed 27/8

20:00-21:35

Nonstop1h 35m

Dublin

Wed 3/9

06:25-08:05

Nonstop1h 40m

£129

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

Sat 27/9

16:25-18:00

Nonstop1h 35m

Dublin

Sat 4/10

14:10-15:45

Nonstop1h 35m

£131

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

Fri 10/10

09:40-11:20

Nonstop1h 40m

Dublin

Sun 12/10

06:55-08:35

Nonstop1h 40m

£135

SouthamptonCork

SOU - ORK

SOUORK

Southampton Eastleigh

Sat 11/10

18:05-22:25

1 stop4h 20m

Cork

Sat 18/10

17:10-08:45

1 stop15h 35m

£157

Flights are sorted by cheapest return flights first.

Deals found on 14/8

Showing 1-10 of 31 results
1
2
3
4

Best time to book a flight from Portsmouth to Ireland

Have a flexible travel schedule? Discover the best time to fly to Ireland 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 Ireland

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

Currently, January is the cheapest month in which you can book a flight from Portsmouth to Ireland (average of £71). Flying from Portsmouth to Ireland in August is currently the most expensive (average of £93). 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 IE?

Find hourly flight availability from Portsmouth to Ireland. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 15 August 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Portsmouth to Ireland as you normally would.

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

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

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

Weekly flight availability from Portsmouth to Ireland

Explore weekly flight availability from Portsmouth to Ireland. 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 15 August 2025.

The most flights from P0R to IE0 are scheduled on a Thursday (76 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (32 on average).

Reviews of airlines servicing Ireland

Get insights into the airlines that provide service to Ireland. 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 Ireland. Reviews last updated 15 August 2025.
See what other customers who have flown with KLM, Aer Lingus, andRyanair from Portsmouth to Ireland have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.8
Good
1,384 reviews
Check prices

Crew

8.4

Food

7.3

Boarding

7.8

Comfort

7.7

Overall

7.8

Entertainment

7.1

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
1,384 reviews
KLM
7.8
Good
1,384 reviews
Check prices

Crew

8.4

Food

7.3

Boarding

7.8

Comfort

7.7

Overall

7.8

Entertainment

7.1

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
7.1
Good
1,214 reviews
KLM
7.8
Good
1,384 reviews
Check prices

Crew

8.4

Food

7.3

Boarding

7.8

Comfort

7.7

Overall

7.8

Entertainment

7.1

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
5,153 reviews
KLM
7.8
Good
1,384 reviews
Check prices

Crew

8.4

Food

7.3

Boarding

7.8

Comfort

7.7

Overall

7.8

Entertainment

7.1

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
7,267 reviews
KLM
7.8
Good
1,384 reviews
Check prices

Crew

8.4

Food

7.3

Boarding

7.8

Comfort

7.7

Overall

7.8

Entertainment

7.1

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 Ireland. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

    Consider Air Canada (90%), Qatar Airways (79%) or LATAM Airlines (79%) when booking your flight. These represent the most reliable airlines when flying from Portsmouth to Ireland.

  • What are the cheapest flights from Portsmouth to Ireland?

    Looking at all options, your cheapest flight can be booked for £70. While the most popular route (Southampton Eastleigh - Dublin) can be booked for £76 on average our data indicates £299 when flying from Portsmouth to Ireland.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Portsmouth to Ireland 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 Ireland?

    Currently, January is the cheapest month in which you can book a flight from Portsmouth to Ireland (average of £71). Flying from Portsmouth to Ireland in August is currently the most expensive (average of £93). 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

Browse thousands of different options on Cheapflights for your next trip

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Top 4 airlines flying from Portsmouth to Ireland

Discover the top 4 airlines that operate flights from Portsmouth to Ireland. 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 15 August 2025.
AirlineCheapestAverageFlexibilityOn-time
RyanairCheapest£25Average£77FlexibilityNo cancel feeOn-timeN/A
Search Ryanair flights
Aer LingusCheapest£60Average£160FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
British AirwaysCheapest£64Average£162FlexibilityNo cancel feeOn-time70%
Search British Airways flights
KLMCheapest£125Average£174FlexibilityNo cancel feeOn-time75%
Search KLM flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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

When you search for this flight from Portsmouth to Ireland, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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

Cheapflights simply makes it quick and affordable to book flights from Portsmouth to Ireland by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

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

Yes! Cheapflights helps users easily find flights from Portsmouth to Ireland with no change fees.

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

Of course! You can now track prices for flights from Portsmouth to Ireland 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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