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).

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.

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).

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.

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 most popular airlines that fly from Portsmouth to Ireland?

British Airways, Aer Lingus and Ryanair are the most popular airlines when flying from Portsmouth to Ireland.

How far in advance should I book a flight from Portsmouth to Ireland?

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 28 days in advance, which can save you up to 155% on flights from Portsmouth to Ireland compared to booking the week you need them. Waiting 28 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at £70. For sooner than that we have options available in the next 3 days from £155.

What is the cheapest month to fly from Portsmouth to Ireland?

September can be a great time to fly to Ireland from Portsmouth with a flight ticket averaging about £64. Cheapflights users have found deals in the month of September for as cheap as £28. The most expensive prices can be found in the month of December.

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.

£171+ Flights from Portsmouth to Ireland

Cheap flight deals from Portsmouth to Ireland

Round-trip from	£106
One-way from	£65
Popular in	December
Cheapest in	September
Average price	£62

Aer Lingus
26/8-31/8
Nonstop
3h 15m total
Portsmouth to Ireland

Search Deals

Aer Lingus
5/11
Nonstop
1h 35m total
Portsmouth to Ireland

Search Deals

Highest demand for flights based on searches. 10% potential increase in price (£4 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 5% potential price decrease (£3 potential savings vs. average return price).

Search Deals

Average for round-trip flights in July 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 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

Best flights from Portsmouth to Ireland
Discover carefully curated flight deals from Portsmouth to Ireland that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 2 July 2025.

Tue 26/820:00SOU - DUB

Nonstop1h 35mAer Lingus

Sun 31/806:55DUB - SOU

Nonstop1h 40mAer Lingus

Deal found 30/6£106

Mon 6/1011:05SOU - DUB

1 stop11h 45mMultiple Airlines

Thu 9/1007:00DUB - SOU

Nonstop1h 40mMultiple Airlines

Deal found 2/7£122

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

Direct flights from Portsmouth to Ireland
Explore direct flight options from Portsmouth to Ireland based on user searches, and compare prices and availability for your desired travel dates. Data last updated 2 July 2025.

Tue 26/820:00SOU - DUB

Nonstop1h 35mAer Lingus

Sun 31/806:55DUB - SOU

Nonstop1h 40mAer Lingus

Deal found 30/6£106

Thu 17/720:00SOU - DUB

Nonstop1h 35mBritish Airways

Thu 24/707:00DUB - SOU

Nonstop1h 40mBritish Airways

Deal found 1/7£220

Last-minute flights from Portsmouth to Ireland
Discover last-minute flight deals from Portsmouth to Ireland. Data last updated 2 July 2025 and is based on user searches.

Thu 10/720:00SOU - DUB

Nonstop1h 35mAer Lingus

Wed 16/706:25DUB - SOU

Nonstop1h 40mAer Lingus

Deal found 30/6£142

Thu 10/718:25SOU - DUB

1 stop4h 00mKLM

Sat 19/705:55DUB - SOU

1 stop11h 05mKLM

Deal found 30/6£186

Fri 11/720:00SOU - DUB

Nonstop1h 35mBritish Airways

Mon 21/706:40DUB - SOU

1 stop25h 30mBritish Airways

Deal found 30/6£343

Sat 12/708:25SOU - DUB

1 stop8h 10mMultiple Airlines

Wed 16/706:25DUB - SOU

Nonstop1h 40mMultiple Airlines

Deal found 30/6£162

Mon 28/720:30SOU - ORK

1 stop28h 00mMultiple Airlines

Mon 4/814:00ORK - SOU

2 stops18h 25mMultiple Airlines

Deal found 30/6£211

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

Tue 26/820:00SOU - DUB

Nonstop1h 35mAer Lingus

Sun 31/806:55DUB - SOU

Nonstop1h 40mAer Lingus

Deal found 30/6£106

One-way flights from Portsmouth to Ireland
Search for one-way flight options from Portsmouth to Ireland. Find affordable one-way fares based on user searches. Data last updated 2 July 2025.

Wed 5/1116:05SOU - DUB

Nonstop1h 35mAer Lingus

Deal found 1/7£65

Mon 29/912:10SOU - DUB

1 stop22h 45mMultiple Airlines

Deal found 29/6£75

Wed 5/1117:20SOU - DUB

1 stop4h 40mKLM

Deal found 1/7£92

Mon 1/920:00SOU - DUB

Nonstop1h 35mBritish Airways

Deal found 30/6£115

Mon 1/915:05SOU - DUB

1 stop20h 55mAurigny Air

Deal found 30/6£145

Sat 9/809:55SOU - ORK

2 stops13h 50mBritish Airways

Deal found 30/6£573

Cheapflights Fare Finder

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

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

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?

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?

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

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

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.

KLM

7.8

Good

1,366 reviews

Check prices

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.

KLM

7.8

Good

1,366 reviews

KLM

7.8

Good

1,366 reviews

Check prices

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.

Aer Lingus

7.1

Good

1,140 reviews

KLM

7.8

Good

1,366 reviews

Check prices

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.

British Airways

6.6

Okay

7,086 reviews

KLM

7.8

Good

1,366 reviews

Check prices

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

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

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Top 4 airlines flying from Portsmouth to Ireland

Airline	Cheapest	Average	Flexibility	On-time
Ryanair	Cheapest£22	Average£75	FlexibilityNo cancel fee	On-timeN/A	Search Ryanair flights
Aer Lingus	Cheapest£59	Average£141	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
British Airways	Cheapest£62	Average£159	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
KLM	Cheapest£125	Average£166	FlexibilityNo cancel fee	On-time75%	Search KLM flights

Fly with Cheapflights

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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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.

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.

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

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Portsmouth to Ireland

Cheapest flights from Portsmouth to IrelandExplore 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.

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.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Portsmouth to Ireland that are best for you.

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.

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?

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.

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.

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.

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.

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?

What are the most reliable airlines from Portsmouth to Ireland?

What are the cheapest flights from Portsmouth to Ireland?

Can I find deals for flights from Portsmouth to Ireland that include hotel bookings?

How can I find direct flights from Portsmouth to Ireland?

Can I find deals for business class flights from Portsmouth to Ireland?

What is the cheapest month to book a flight from Portsmouth to Ireland?

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

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?

Why should you use Cheapflights to find cheap flight tickets from Portsmouth to Ireland?

Can Cheapflights find flights from Portsmouth to Ireland with no change fees?

Can Cheapflights notify me if prices for flights from Portsmouth to Ireland become cheaper?

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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.