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Cheap flights from Portsmouth to Ireland from £54

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 2/3. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — DUB
23 Mar — 30 Mar1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Portsmouth to Ireland

Enter your travel dates to find the best prices.

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 21 February 2026.

Fri 20/320:10
SOU
-
DUB
Nonstop1h 40m
Aer Lingus
Sun 22/307:00
DUB
-
SOU
Nonstop1h 45m
Aer Lingus
Deal found 21/2£105
Thu 19/320:10
SOU
-
DUB
Nonstop1h 40m
Aer Lingus
Sun 22/307:00
DUB
-
SOU
Nonstop1h 45m
Aer Lingus
Deal found 19/2£107
Sat 4/420:00
SOU
-
DUB
Nonstop1h 35m
Aer Lingus
Sat 11/407:00
DUB
-
SOU
Nonstop1h 40m
Aer Lingus
Deal found 18/2£108
Mon 23/320:10
SOU
-
DUB
Nonstop1h 40m
Aer Lingus
Tue 24/310:10
DUB
-
SOU
Nonstop1h 45m
Aer Lingus
Deal found 19/2£109
Thu 5/316:05
SOU
-
DUB
Nonstop1h 35m
Aer Lingus
Mon 23/307:00
DUB
-
SOU
Nonstop1h 45m
Aer Lingus
Deal found 19/2£111
Wed 4/316:05
SOU
-
DUB
Nonstop1h 35m
Aer Lingus
Sat 7/307:00
DUB
-
SOU
Nonstop1h 45m
Aer Lingus
Deal found 18/2£111
Fri 20/320:10
SOU
-
DUB
Nonstop1h 40m
Multiple Airlines
Mon 23/322:10
DUB
-
SOU
1 stop10h 40m
Multiple Airlines
Deal found 21/2£112
Wed 4/316:05
SOU
-
DUB
Nonstop1h 35m
Aer Lingus
Sun 8/307:00
DUB
-
SOU
Nonstop1h 45m
Aer Lingus
Deal found 18/2£115
Mon 6/420:00
SOU
-
DUB
Nonstop1h 35m
Aer Lingus
Mon 13/407:00
DUB
-
SOU
Nonstop1h 40m
Aer Lingus
Deal found 20/2£116
Thu 5/320:10
SOU
-
DUB
Nonstop1h 40m
Aer Lingus
Mon 9/307:00
DUB
-
SOU
Nonstop1h 45m
Aer Lingus
Deal found 20/2£117
Sun 5/410:00
SOU
-
ORK
2 stops21h 50m
Multiple Airlines
Sun 12/421:20
ORK
-
SOU
2 stops14h 30m
Multiple Airlines
Deal found 19/2£172
Mon 6/418:20
SOU
-
ORK
1 stop13h 45m
Multiple Airlines
Mon 13/414:35
ORK
-
SOU
2 stops26h 40m
Multiple Airlines
Deal found 20/2£177

Find flight deals from Portsmouth to Ireland

Keep the following information in mind while searching for Portsmouth to Ireland flight deals. Data was last updated 21 February 2026.

Round-trip from

£105

One-way from

£54

Popular in

December

Cheapest in

January

Average price

£79
Aer Lingus
  • Aer Lingus
  • 20/3-22/3
  • Nonstop
  • 3h 25m total
  • Portsmouth to Ireland
Search Deals
Aer Lingus
  • Aer Lingus
  • 2/3
  • Nonstop
  • 1h 40m total
  • Portsmouth to Ireland
Search Deals
High demand for flights, 4% potential price rise
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£2 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

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 21 February 2026.
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

Thu 16/4

20:00-21:35

Nonstop1h 35m

Dublin

Sat 18/4

17:50-19:30

Nonstop1h 40m

£109

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

Mon 23/3

16:05-17:40

Nonstop1h 35m

Dublin

Tue 24/3

13:55-15:35

Nonstop1h 40m

£118

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

Thu 19/3

20:10-21:50

Nonstop1h 40m

Dublin

Thu 26/3

17:15-08:20

1 stop15h 05m

£120

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

Sun 8/3

20:10-21:50

Nonstop1h 40m

Dublin

Tue 10/3

10:10-11:55

Nonstop1h 45m

£123

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

Mon 23/3

20:10-21:50

Nonstop1h 40m

Dublin

Sat 28/3

19:00-08:25

1 stop13h 25m

£128

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

Thu 9/4

20:00-21:35

Nonstop1h 35m

Dublin

Sun 12/4

23:10-11:50

2 stops12h 40m

£145

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

Thu 19/3

18:05-22:10

1 stop4h 05m

Dublin

Thu 26/3

17:15-17:00

1 stop23h 45m

£153

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

Fri 13/3

20:10-21:50

Nonstop1h 40m

Dublin

Sun 15/3

08:50-17:15

1 stop8h 25m

£166

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

Thu 23/7

18:05-22:25

1 stop4h 20m

Dublin

Wed 29/7

17:50-19:30

Nonstop1h 40m

£166

SouthamptonCork

SOU - ORK

SOUORK

Southampton Eastleigh

Sun 5/4

10:00-07:50

2 stops21h 50m

Cork

Sun 12/4

21:20-11:50

2 stops14h 30m

£172

Flights are sorted by cheapest return flights first.

Deals found on 17/2

Showing 1-10 of 28 results
1
2
3

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, March is the cheapest month in which you can book a flight from Portsmouth to Ireland (average of £23). Flying from Portsmouth to Ireland in August is currently the most expensive (average of £32). 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 21 February 2026.

It’s typically best to fly out from Portsmouth to Ireland in the afternoon. Doing so could potentially save you 27% on the flight price compared to flying in the morning, which is usually more expensive.

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 17 February 2026.

Travellers seeking maximum savings on their Portsmouth to Ireland flight should consider departing on Monday afternoons when fares are most often at their lowest. Sunday at midday 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 21 February 2026.

The most flights from P0R to IE0 are scheduled on a Friday (70 on average). You will have fewer flight options on Saturday, 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 21 February 2026.
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
7.7
Good
1,457 reviews
Check prices

Boarding

7.8

Entertainment

7.1

Overall

7.7

Comfort

7.6

Food

7.3

Crew

8.4

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
KLM
7.7
Good
1,457 reviews
KLM
7.7
Good
1,457 reviews
Check prices

Boarding

7.8

Entertainment

7.1

Overall

7.7

Comfort

7.6

Food

7.3

Crew

8.4

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
Aer Lingus
7.2
Good
1,458 reviews
KLM
7.7
Good
1,457 reviews
Check prices

Boarding

7.8

Entertainment

7.1

Overall

7.7

Comfort

7.6

Food

7.3

Crew

8.4

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
Ryanair
6.9
Okay
5,277 reviews
KLM
7.7
Good
1,457 reviews
Check prices

Boarding

7.8

Entertainment

7.1

Overall

7.7

Comfort

7.6

Food

7.3

Crew

8.4

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
British Airways
6.7
Okay
7,756 reviews
KLM
7.7
Good
1,457 reviews
Check prices

Boarding

7.8

Entertainment

7.1

Overall

7.7

Comfort

7.6

Food

7.3

Crew

8.4

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas

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.

  • How long is the flight from Portsmouth to Ireland?

    For as low as £109, Aer Lingus can have you in Ireland from Portsmouth in 1h 35m. The distance between Portsmouth and Ireland is about 268 mi. Generally, flights for this route are direct.

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

    Consider Japan Airlines (89%), Kenya Airways (89%) or Qatar Airways (82%) 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 £54. While the most popular route (Southampton Eastleigh - Dublin) can be booked for £104 on average, our data indicates £845 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, March is the cheapest month in which you can book a flight from Portsmouth to Ireland (average of £23). Flying from Portsmouth to Ireland in August is currently the most expensive (average of £32). 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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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 21 February 2026.
AirlineCheapestAverageFlexibilityOn-time
RyanairCheapest£22Average£78FlexibilityNo cancel feeOn-timeN/A
Search Ryanair flights
Aer LingusCheapest£67Average£160FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
British AirwaysCheapest£68Average£181FlexibilityNo cancel feeOn-time70%
Search British Airways flights
KLMCheapest£137Average£154FlexibilityNo 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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