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Cheap flights from Portsmouth to Ireland from £77

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 21/11. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — DUB
16 Nov — 23 Nov1
1 adult
1 adult, Economy

Find 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 17 October 2025.

Fri 12/1208:10SOU - DUB
1 stop9h 20mMultiple Airlines
Sun 14/1207:00DUB - SOU
Nonstop1h 45mMultiple Airlines
Deal found 16/10£96
Mon 15/1208:30SOU - DUB
1 stop7h 25mMultiple Airlines
Tue 16/1210:10DUB - SOU
Nonstop1h 45mMultiple Airlines
Deal found 16/10£104
Thu 27/1120:10SOU - DUB
Nonstop1h 40mAer Lingus
Sun 30/1107:00DUB - SOU
Nonstop1h 45mAer Lingus
Deal found 15/10£108
Mon 15/1220:10SOU - DUB
Nonstop1h 40mAer Lingus
Tue 16/1210:10DUB - SOU
Nonstop1h 45mAer Lingus
Deal found 16/10£109
Mon 10/1116:05SOU - DUB
Nonstop1h 35mAer Lingus
Tue 11/1110:10DUB - SOU
Nonstop1h 45mAer Lingus
Deal found 15/10£115
Mon 10/1119:55SOU - DUB
1 stop11h 35mMultiple Airlines
Tue 11/1118:00DUB - SOU
Nonstop1h 40mMultiple Airlines
Deal found 15/10£116
Sun 30/1109:30SOU - DUB
Nonstop1h 40mAer Lingus
Sun 7/1207:00DUB - SOU
Nonstop1h 45mAer Lingus
Deal found 16/10£118
Fri 12/1220:10SOU - DUB
Nonstop1h 40mAer Lingus
Sun 14/1207:00DUB - SOU
Nonstop1h 45mAer Lingus
Deal found 16/10£120
Fri 21/1120:10SOU - DUB
Nonstop1h 40mAer Lingus
Mon 24/1107:00DUB - SOU
Nonstop1h 45mAer Lingus
Deal found 17/10£121
Sun 30/1118:20SOU - DUB
1 stop4h 55mMultiple Airlines
Sun 7/1207:00DUB - SOU
Nonstop1h 45mMultiple Airlines
Deal found 16/10£129
Fri 21/1119:50SOU - ORK
1 stop16h 20mMultiple Airlines
Mon 24/1113:15ORK - SOU
2 stops19h 35mMultiple Airlines
Deal found 15/10£150
Sun 30/1118:25SOU - ORK
1 stop12h 45mMultiple Airlines
Sun 7/1208:20ORK - SOU
1 stop29h 40mMultiple Airlines
Deal found 16/10£197

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 17 October 2025.

Round-trip from

£96

One-way from

£77

Popular in

December

Cheapest in

January

Average price

£68
Aer Lingus
  • Aer Lingus
  • 12/12-14/12
  • 1 total stop
  • 11h 05m total
  • Portsmouth to Ireland
Search Deals
Aer Lingus
  • Aer Lingus
  • 21/11
  • Nonstop
  • 1h 40m 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 October 2025
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 17 October 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

Mon 10/11

16:05-17:40

Nonstop1h 35m

Dublin

Tue 11/11

10:10-11:55

Nonstop1h 45m

£115

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

Sun 30/11

09:30-11:10

Nonstop1h 40m

Dublin

Sun 7/12

07:00-08:45

Nonstop1h 45m

£118

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

Sun 30/11

18:20-23:15

1 stop4h 55m

Dublin

Sun 7/12

07:00-08:45

Nonstop1h 45m

£129

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

Mon 15/12

19:55-12:40

1 stop16h 45m

Dublin

Tue 16/12

18:25-08:50

1 stop14h 25m

£136

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

Fri 21/11

08:10-07:40

1 stop23h 30m

Dublin

Mon 24/11

07:00-08:45

Nonstop1h 45m

£136

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

Mon 10/11

19:55-09:50

2 stops13h 55m

Dublin

Tue 11/11

18:00-19:40

Nonstop1h 40m

£140

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

Thu 27/11

08:50-16:20

1 stop7h 30m

Dublin

Sun 30/11

07:00-08:45

Nonstop1h 45m

£140

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

Thu 12/2

17:55-22:25

1 stop4h 30m

Dublin

Tue 17/2

13:55-15:35

Nonstop1h 40m

£146

SouthamptonCork

SOU - ORK

SOUORK

Southampton Eastleigh

Fri 21/11

19:50-12:10

1 stop16h 20m

Cork

Mon 24/11

13:15-08:50

2 stops19h 35m

£150

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

Thu 1/1

17:55-22:25

1 stop4h 30m

Dublin

Sun 4/1

07:00-08:45

Nonstop1h 45m

£152

Flights are sorted by cheapest return flights first.

Deals found on 17/10

Showing 1-10 of 27 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, December is the cheapest month in which you can book a flight from Portsmouth to Ireland (average of £17). 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 17 October 2025.

It’s typically best to fly out from Portsmouth to Ireland at midday. Doing so could potentially save you 35% 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 16 December 2024.

Travellers seeking maximum savings on their Portsmouth to Ireland flight should consider departing on Monday afternoons when fares are most often at their lowest. Friday 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 17 October 2025.

The most flights from P0R to IE0 are scheduled on a Friday (72 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (35 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 17 October 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
7.7
Good
1,404 reviews
Check prices

Crew

8.4

Overall

7.7

Boarding

7.8

Comfort

7.6

Entertainment

7.1

Food

7.3

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
KLM
7.7
Good
1,404 reviews
KLM
7.7
Good
1,404 reviews
Check prices

Crew

8.4

Overall

7.7

Boarding

7.8

Comfort

7.6

Entertainment

7.1

Food

7.3

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
Aer Lingus
7.2
Good
1,341 reviews
KLM
7.7
Good
1,404 reviews
Check prices

Crew

8.4

Overall

7.7

Boarding

7.8

Comfort

7.6

Entertainment

7.1

Food

7.3

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
Ryanair
6.8
Okay
5,179 reviews
KLM
7.7
Good
1,404 reviews
Check prices

Crew

8.4

Overall

7.7

Boarding

7.8

Comfort

7.6

Entertainment

7.1

Food

7.3

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
British Airways
6.7
Okay
7,457 reviews
KLM
7.7
Good
1,404 reviews
Check prices

Crew

8.4

Overall

7.7

Boarding

7.8

Comfort

7.6

Entertainment

7.1

Food

7.3

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.

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 £115, 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 Air Canada (71%), LATAM Airlines (70%) or Qatar Airways (67%) 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 £69. While the most popular route (Southampton Eastleigh - Dublin) can be booked for £96 on average, our data indicates £610 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, December is the cheapest month in which you can book a flight from Portsmouth to Ireland (average of £17). 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 17 October 2025.
AirlineCheapestAverageFlexibilityOn-time
RyanairCheapest£25Average£77FlexibilityNo cancel feeOn-timeN/A
Search Ryanair flights
Aer LingusCheapest£48Average£161FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
British AirwaysCheapest£67Average£163FlexibilityNo cancel feeOn-time70%
Search British Airways flights
KLMCheapest£127Average£179FlexibilityNo 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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