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Cheap flights from Portsmouth to Ireland from £37

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 29/7. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — DUB
18 6月 — 25 6月1
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 13 6月 2025.

Round-trip from

£81

One-way from

£37

Popular in

December

Cheapest in

September

Average price

£71
Aer Lingus
  • Aer Lingus
  • 24/7-29/7
  • Nonstop
  • 3h 15m total
  • Portsmouth to Ireland
Search Deals
Aer Lingus
  • Aer Lingus
  • 29/7
  • Nonstop
  • 1h 35m total
  • Portsmouth to Ireland
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (£5 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£3 potential savings vs. average return price).
Search Deals
Average for round-trip flights in June 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 13 6月 2025.

週三 9/709:10SOU - DUB
Nonstop1h 40mAer Lingus
週三 16/706:25DUB - SOU
Nonstop1h 40mAer Lingus
Deal found 10/6£79
週四 24/720:00SOU - DUB
Nonstop1h 35mMultiple Airlines
週二 29/718:20DUB - SOU
1 stop16h 00mMultiple Airlines
Deal found 12/6£113
週三 9/718:25SOU - DUB
1 stop4h 00mKLM
週三 16/720:45DUB - SOU
1 stop12h 00mKLM
Deal found 10/6£155
週六 5/717:35SOU - ORK
1 stop5h 55mKLM
週六 12/706:00ORK - SOU
1 stop26h 45mKLM
Deal found 12/6£187
週一 7/720:30SOU - ORK
2 stops20h 00mMultiple Airlines
週一 14/713:40ORK - SOU
2 stops19h 00mMultiple Airlines
Deal found 12/6£203
週五 25/720:00SOU - DUB
Nonstop1h 35mBritish Airways
週一 28/717:50DUB - SOU
Nonstop1h 40mBritish Airways
Deal found 11/6£219

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 13 6月 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

週四 24/7

20:00-21:35

Nonstop1h 35m

Dublin

週二 29/7

07:00-08:40

Nonstop1h 40m

£81

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

週四 24/7

20:00-21:35

Nonstop1h 35m

Dublin

週二 29/7

18:20-10:20

1 stop16h 00m

£113

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

週三 2/7

09:20-16:40

1 stop7h 20m

Dublin

週一 7/7

20:45-08:50

1 stop12h 05m

£155

SouthamptonCork

SOU - ORK

SOUORK

Southampton Eastleigh

週六 5/7

17:35-23:30

1 stop5h 55m

Cork

週六 12/7

06:00-08:45

1 stop26h 45m

£187

SouthamptonCork

SOU - ORK

SOUORK

Southampton Eastleigh

週一 7/7

20:30-16:30

2 stops20h 00m

Cork

週一 14/7

13:40-08:40

2 stops19h 00m

£203

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

週五 25/7

20:00-21:35

Nonstop1h 35m

Dublin

週一 28/7

17:50-19:30

Nonstop1h 40m

£219

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

週四 24/7

19:20-12:20

1 stop17h 00m

Dublin

週一 28/7

13:00-08:05

1 stop19h 05m

£531

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

週二 29/7

20:00-21:35

Nonstop1h 35m

£37

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

週二 9/9

12:25-21:30

1 stop9h 05m

£71

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

週二 5/8

18:25-22:25

1 stop4h 00m

£96

Flights are sorted by cheapest return flights first.

Deals found on 11/6

Showing 1-10 of 15 results
1
2

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 £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 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 13 6月 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 13 6月 2025.

The most flights from P0R to IE0 are scheduled on a Thursday (73 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (32 on average).

Rainfall in Ireland by month

Plan your trip to Ireland by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Ireland ranges from 49.0 - 79.0 inches per month. October is typically the wettest month, when rainfall can reach 79.0 mm. February is typically the driest time to visit Ireland when rainfall is around 49.0 mm.

Temperature in Ireland by month

Plan your trip to Ireland by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Ireland, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 16.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 5.0 C).

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 13 6月 2025.
See what other customers who have flown with KLM, Aer Lingus and British Airways 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
1,358 reviews
Check prices

Food

7.2

Boarding

7.8

Comfort

7.7

Overall

7.8

Entertainment

7.1

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Allan,Jun 2025

YYZ - AMS

I always enjoy flying KLM. Service is attentive, friendly and professional. The seat, when fully reclined is a little hard; some kind of mattress or topper would be helpful here. The dinner was really not very good …. “Meatless meatballs” tasted quite peculiar. Breakfast which consisted of an egg white omelette in flour tortilla was also rather tasteless.
KLM
7.8
Good
1,358 reviews
KLM
7.8
Good
1,358 reviews
Check prices

Food

7.2

Boarding

7.8

Comfort

7.7

Overall

7.8

Entertainment

7.1

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Allan,Jun 2025

YYZ - AMS

I always enjoy flying KLM. Service is attentive, friendly and professional. The seat, when fully reclined is a little hard; some kind of mattress or topper would be helpful here. The dinner was really not very good …. “Meatless meatballs” tasted quite peculiar. Breakfast which consisted of an egg white omelette in flour tortilla was also rather tasteless.
Aer Lingus
7.1
Good
1,118 reviews
KLM
7.8
Good
1,358 reviews
Check prices

Food

7.2

Boarding

7.8

Comfort

7.7

Overall

7.8

Entertainment

7.1

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Allan,Jun 2025

YYZ - AMS

I always enjoy flying KLM. Service is attentive, friendly and professional. The seat, when fully reclined is a little hard; some kind of mattress or topper would be helpful here. The dinner was really not very good …. “Meatless meatballs” tasted quite peculiar. Breakfast which consisted of an egg white omelette in flour tortilla was also rather tasteless.
British Airways
6.6
Okay
7,011 reviews
KLM
7.8
Good
1,358 reviews
Check prices

Food

7.2

Boarding

7.8

Comfort

7.7

Overall

7.8

Entertainment

7.1

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Allan,Jun 2025

YYZ - AMS

I always enjoy flying KLM. Service is attentive, friendly and professional. The seat, when fully reclined is a little hard; some kind of mattress or topper would be helpful here. The dinner was really not very good …. “Meatless meatballs” tasted quite peculiar. Breakfast which consisted of an egg white omelette in flour tortilla was also rather tasteless.

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 cheapest airlines to fly from Portsmouth to Ireland one-way?

    The cheapet airlines for a one-way flight from Portsmouth to Ireland are Aer Lingus (£37), KLM (£96), and British Airways (£114).

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

    Consider LATAM Airlines (91%), Aer Lingus (90%) or British Airways (90%) 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 £80. While the most popular route (Southampton Eastleigh - Dublin) can be booked for £72 on average our data indicates £574 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 £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

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Alternative routes for Portsmouth to Ireland

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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 13 6月 2025.
AirlineCheapestAverageFlexibilityOn-time
RyanairCheapest£25Average£71FlexibilityNo cancel feeOn-timeN/A
Search Ryanair flights
British AirwaysCheapest£44Average£154FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Aer LingusCheapest£60Average£141FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
KLMCheapest£126Average£168FlexibilityNo cancel feeOn-time75%
Search KLM flights

Fly with Cheapflights

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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.

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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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