Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from Portsmouth to Ireland from £65

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 5/11. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — DUB
7 Jul — 14 Jul1
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 2 July 2025.

Round-trip from

£106

One-way from

£65

Popular in

December

Cheapest in

September

Average price

£62
Aer Lingus
  • Aer Lingus
  • 26/8-31/8
  • Nonstop
  • 3h 15m total
  • Portsmouth to Ireland
Aer Lingus
  • Aer Lingus
  • 5/11
  • Nonstop
  • 1h 35m total
  • Portsmouth to Ireland
Highest demand for flights based on searches. 10% potential increase in price (£4 potential increase over avg. return price).
Cheapest flight prices on average. 5% potential price decrease (£3 potential savings vs. average return price).
Average for round-trip flights in July 2025

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 2 July 2025.

Tue 26/820:00SOU - DUB
Nonstop1h 35mAer Lingus
Sun 31/806:55DUB - SOU
Nonstop1h 40mAer Lingus
Deal found 30/6£106
Wed 20/809:20SOU - DUB
1 stop7h 20mMultiple Airlines
Tue 26/807:00DUB - SOU
Nonstop1h 40mMultiple Airlines
Deal found 1/7£138
Wed 20/809:20SOU - DUB
1 stop10h 55mKLM
Tue 26/820:45DUB - SOU
1 stop12h 00mKLM
Deal found 30/6£154
Wed 20/818:25SOU - ORK
1 stop4h 00mKLM
Sat 23/817:15ORK - SOU
1 stop15h 30mKLM
Deal found 1/7£199
Mon 28/720:30SOU - ORK
1 stop28h 00mMultiple Airlines
Mon 4/814:00ORK - SOU
2 stops18h 25mMultiple Airlines
Deal found 30/6£211

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 2 July 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

Tue 26/8

20:00-21:35

Nonstop1h 35m

Dublin

Sun 31/8

06:55-08:35

Nonstop1h 40m

£106

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

Mon 6/10

11:05-22:50

1 stop11h 45m

Dublin

Thu 9/10

07:00-08:40

Nonstop1h 40m

£122

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

Wed 20/8

09:20-20:15

1 stop10h 55m

Dublin

Tue 26/8

20:45-08:45

1 stop12h 00m

£154

SouthamptonCork

SOU - ORK

SOUORK

Southampton Eastleigh

Wed 20/8

18:25-22:25

1 stop4h 00m

Cork

Sat 23/8

17:15-08:45

1 stop15h 30m

£199

SouthamptonCork

SOU - ORK

SOUORK

Southampton Eastleigh

Mon 28/7

20:30-00:30

1 stop28h 00m

Cork

Mon 4/8

14:00-08:25

2 stops18h 25m

£211

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

Wed 5/11

16:05-17:40

Nonstop1h 35m

£65

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

Mon 29/9

12:10-10:55

1 stop22h 45m

£75

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

Wed 5/11

17:20-22:00

1 stop4h 40m

£92

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

Mon 1/9

20:00-21:35

Nonstop1h 35m

£115

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

Mon 1/9

15:05-12:00

1 stop20h 55m

£145

Flights are sorted by cheapest return flights first.

Deals found on 1/7

Showing 1-10 of 11 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 £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 2 July 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 Thursday 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 2 July 2025.

The most flights from P0R to IE0 are scheduled on a Monday (66 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (29 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 2 July 2025.
See what other customers who have flown with KLM, Aer Lingus, andBritish 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.

Comfort

7.7

Boarding

7.8

Crew

8.4

Entertainment

7.1

Food

7.2

Overall

7.8

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.

Comfort

7.7

Boarding

7.8

Crew

8.4

Entertainment

7.1

Food

7.2

Overall

7.8

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.

Comfort

7.7

Boarding

7.8

Crew

8.4

Entertainment

7.1

Food

7.2

Overall

7.8

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.

Comfort

7.7

Boarding

7.8

Crew

8.4

Entertainment

7.1

Food

7.2

Overall

7.8

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 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 (£65), KLM (£92), and British Airways (£115).

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

    Consider Air Canada (94%), LATAM Airlines (93%) or Aer Lingus (92%) 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 £75 on average our data indicates £828 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Portsmouth to Ireland

See prices for flight routes from nearby airports that may be better suited for you.

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 2 July 2025.
AirlineCheapestAverageFlexibilityOn-time
RyanairCheapest£22Average£75FlexibilityNo cancel feeOn-timeN/A
Search Ryanair flights
Aer LingusCheapest£59Average£141FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
British AirwaysCheapest£62Average£159FlexibilityNo cancel feeOn-time70%
Search British Airways flights
KLMCheapest£125Average£166FlexibilityNo 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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.