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Cheap flights from Portsmouth to Ireland from £56

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 4/8. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — DUB
18 Aug — 25 Aug1
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 19 July 2026.

Tue 11/820:00
SOU
-
DUB
Nonstop1h 35m
Aer Lingus
Thu 13/807:00
DUB
-
SOU
Nonstop1h 40m
Aer Lingus
Deal found 19/7£107
Sat 1/820:00
SOU
-
DUB
Nonstop1h 35m
Aer Lingus
Mon 3/807:00
DUB
-
SOU
Nonstop1h 40m
Aer Lingus
Deal found 15/7£108
Fri 14/820:00
SOU
-
DUB
Nonstop1h 35m
Aer Lingus
Sun 16/806:55
DUB
-
SOU
Nonstop1h 40m
Aer Lingus
Deal found 18/7£109
Tue 1/917:20
SOU
-
DUB
Nonstop1h 35m
Multiple Airlines
Tue 8/906:55
DUB
-
SOU
1 stop27h 20m
Multiple Airlines
Deal found 18/7£114
Wed 5/820:00
SOU
-
DUB
Nonstop1h 35m
Aer Lingus
Thu 6/807:00
DUB
-
SOU
Nonstop1h 40m
Aer Lingus
Deal found 18/7£115
Thu 27/817:20
SOU
-
DUB
Nonstop1h 35m
Aer Lingus
Wed 2/915:10
DUB
-
SOU
Nonstop1h 40m
Aer Lingus
Deal found 14/7£119
Tue 18/820:00
SOU
-
DUB
Nonstop1h 35m
Aer Lingus
Tue 25/807:00
DUB
-
SOU
Nonstop1h 40m
Aer Lingus
Deal found 15/7£120
Tue 8/913:25
SOU
-
DUB
1 stop8h 15m
Multiple Airlines
Thu 10/907:00
DUB
-
SOU
Nonstop1h 40m
Multiple Airlines
Deal found 16/7£121
Sun 20/917:20
SOU
-
DUB
Nonstop1h 35m
Aer Lingus
Thu 24/917:50
DUB
-
SOU
Nonstop1h 40m
Aer Lingus
Deal found 18/7£123
Sun 20/910:00
SOU
-
DUB
1 stop6h 55m
Multiple Airlines
Thu 24/917:50
DUB
-
SOU
Nonstop1h 40m
Multiple Airlines
Deal found 18/7£123
Tue 1/918:10
SOU
-
ORK
1 stop14h 35m
Multiple Airlines
Tue 8/908:15
ORK
-
SOU
2 stops26h 00m
Multiple Airlines
Deal found 18/7£139
Mon 7/919:20
SOU
-
ORK
2 stops18h 10m
Multiple Airlines
Mon 14/920:55
ORK
-
SOU
2 stops15h 55m
Multiple Airlines
Deal found 15/7£155

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 19 July 2026.

Round-trip from

£107

One-way from

£56

Popular in

December

Cheapest in

January

Average price

£88
Aer Lingus
  • Aer Lingus
  • 11/8-13/8
  • Nonstop
  • 3h 15m total
  • Portsmouth to Ireland
Search Deals
Aer Lingus
  • Aer Lingus
  • 4/8
  • Nonstop
  • 1h 35m total
  • Portsmouth to Ireland
Search Deals
High demand for flights, 9% potential price rise
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£2 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 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 19 July 2026.
Use the filters below to find and compare flights from Portsmouth to Ireland that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

Sun 3/1

09:20-11:00

Nonstop1h 40m

Dublin

Tue 5/1

07:00-08:40

Nonstop1h 40m

£132

SouthamptonCork

SOU - ORK

SOUORK

Southampton Eastleigh

Tue 1/9

18:10-08:45

1 stop14h 35m

Cork

Tue 8/9

08:15-10:15

2 stops26h 00m

£139

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

Sat 2/1

17:30-22:15

1 stop4h 45m

Dublin

Tue 5/1

08:50-17:00

1 stop8h 10m

£167

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

Wed 19/8

08:55-23:35

2 stops14h 40m

Dublin

Wed 26/8

19:30-08:35

1 stop13h 05m

£172

SouthamptonCork

SOU - ORK

SOUORK

Southampton Eastleigh

Sat 15/8

06:45-10:55

1 stop4h 10m

Cork

Sat 22/8

08:00-19:30

2 stops11h 30m

£203

SouthamptonCork

SOU - ORK

SOUORK

Southampton Eastleigh

Sat 15/8

06:45-08:30

1 stop25h 45m

Cork

Wed 19/8

14:05-08:40

2 stops18h 35m

£209

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

Wed 13/1

09:20-11:00

Nonstop1h 40m

Dublin

Wed 27/1

07:00-08:40

Nonstop1h 40m

£227

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

Thu 14/1

09:20-11:00

Nonstop1h 40m

Dublin

Thu 28/1

14:45-16:35

Nonstop1h 50m

£228
Fastest return journey

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

Thu 15/10

20:00-21:35

Nonstop1h 35m

Dublin

Thu 29/10

07:00-08:40

Nonstop1h 40m

£228

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

Fri 16/10

20:00-21:35

Nonstop1h 35m

Dublin

Fri 30/10

14:45-16:35

Nonstop1h 50m

£229

Flights are sorted by cheapest return flights first.

Deals found on 18/7

Showing 1-10 of 30 resultsSorted by cheapest first
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 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 19 July 2026.

It’s typically best to fly out from Portsmouth to Ireland in the afternoon. Doing so could potentially save you 26% on the flight price compared to flying in the morning, which is usually more expensive.

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 19 July 2026.

The most flights from P0R to IE0 are scheduled on a Saturday (70 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (34 on average).

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 11 July 2026.

Travellers seeking maximum savings on their Portsmouth to Ireland flight should consider departing on Thursday at midday 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.

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 19 July 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
7.8
Good
1,541 reviews
Check prices

Entertainment

7.2

Comfort

7.7

Boarding

7.8

Crew

8.4

Food

7.3

Overall

7.8

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
KLM
7.8
Good
1,541 reviews
KLM
7.8
Good
1,541 reviews
Check prices

Entertainment

7.2

Comfort

7.7

Boarding

7.8

Crew

8.4

Food

7.3

Overall

7.8

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
Aer Lingus
7.3
Good
1,673 reviews
KLM
7.8
Good
1,541 reviews
Check prices

Entertainment

7.2

Comfort

7.7

Boarding

7.8

Crew

8.4

Food

7.3

Overall

7.8

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
Ryanair
6.9
Okay
5,438 reviews
KLM
7.8
Good
1,541 reviews
Check prices

Entertainment

7.2

Comfort

7.7

Boarding

7.8

Crew

8.4

Food

7.3

Overall

7.8

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
British Airways
6.7
Okay
8,125 reviews
KLM
7.8
Good
1,541 reviews
Check prices

Entertainment

7.2

Comfort

7.7

Boarding

7.8

Crew

8.4

Food

7.3

Overall

7.8

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful

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 £132, Aer Lingus can have you in Ireland from Portsmouth in 1h 40m. The distance between Portsmouth and Ireland is about 268 mi. Both multi-stop and direct flights can be found to your destination and back.

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

    Consider Air Canada (82%), Kenya Airways (79%) or Aer Lingus (76%) 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 £57. While the most popular route (Southampton Eastleigh - Dublin) can be booked for £96 on average, our data indicates £1,433 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.

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 19 July 2026.
AirlineCheapestAverageFlexibilityOn-time
RyanairCheapest£31Average£77FlexibilityNo cancel feeOn-timeN/A
Search Ryanair flights
Aer LingusCheapest£65Average£144FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
British AirwaysCheapest£69Average£179FlexibilityNo cancel feeOn-time70%
Search British Airways flights
KLMCheapest£121Average£168FlexibilityNo 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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