What are the cheapest airlines to fly from Ireland to Portsmouth one-way?

One-way options have recently been found by users for as low as £50 on Aer Lingus. Other airlines that offer cheap prices include KLM from £91 and British Airways from £107 one-way.

In terms of precipitation, rainfall in Portsmouth ranges from 25.0 - 76.0 inches per month. December is typically the wettest month, when rainfall can reach 76.0 mm. July is typically the driest time to visit Portsmouth when rainfall is around 25.0 mm.

If weather is an important factor for your trip to Portsmouth, 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 18.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 4.0 C).

What are the most popular routes from Ireland to Portsmouth?

When deciding which route to take from Ireland to Portsmouth consider Dublin - Southampton Eastleigh, Cork - Southampton Eastleigh or Knock Intl - Southampton Eastleigh as they are the most popular.

What are the cheapest flights from Ireland to Portsmouth?

The cheapest flight price from Ireland to Portsmouth is £52. On average you can expect to pay £1,296. The most popular route, (Dublin - Southampton Eastleigh), can usually be booked for £72.

What are the most reliable airlines from Ireland to Portsmouth?

Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Ireland to Portsmouth on time: Air Canada (81%), British Airways (79%), Aer Lingus (78%).

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

Find a great deal and save up to 235% by booking at least 57 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from Ireland to Portsmouth within the next two weeks, with the cheapest ticket starting at £92.

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

January is one of the best times of the year to fly to Portsmouth from Ireland. Prices for January average £81 per person but you can even find prices for as low as £24. The most expensive prices can be found in the month of June. Opting for a January flight can save you 26% on your journey compared to booking in June

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

Yes. In addition to deals on Ireland to Portsmouth flights, Cheapflights offers holiday packages that include both flights and hotel.

How can I find direct flights from Ireland to Portsmouth?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ireland to Portsmouth.

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

Yes. Cheapflights offers flight deals from Ireland to Portsmouth by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

£50+ Flights from Ireland to Portsmouth

Cheap flight deals from Ireland to Portsmouth

Round-trip from	£72
One-way from	£50
Popular in	June
Cheapest in	January
Average price	£91

Aer Lingus
20/8-28/8
Nonstop
3h 15m total
Ireland to Portsmouth

Search Deals

Aer Lingus
13/8
Nonstop
1h 40m total
Ireland to Portsmouth

Search Deals

Highest demand for flights based on searches. 14% potential increase in price (£10 potential increase over avg. return price).

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 2025

Search Deals

Find flight deals from Ireland to Portsmouth

Cheapest flights from Ireland to Portsmouth
Explore the most affordable flight options available from Ireland to Portsmouth. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 July 2025.

Wed 20/806:25DUB - SOU

Nonstop1h 40mAer Lingus

Thu 28/820:00SOU - DUB

Nonstop1h 35mAer Lingus

Deal found 10/7£72

Wed 20/806:25DUB - SOU

Nonstop1h 40mMultiple Airlines

Thu 28/811:25SOU - DUB

1 stop7h 25mMultiple Airlines

Deal found 10/7£117

Tue 19/820:45DUB - SOU

1 stop12h 00mKLM

Tue 26/817:35SOU - DUB

1 stop4h 50mKLM

Deal found 10/7£174

Mon 25/814:00ORK - SOU

2 stops18h 25mMultiple Airlines

Mon 1/911:50SOU - ORK

2 stops21h 10mMultiple Airlines

Deal found 11/7£241

Sat 19/717:15ORK - SOU

1 stop15h 30mKLM

Mon 21/718:25SOU - ORK

1 stop22h 25mKLM

Deal found 9/7£321

Sat 23/813:05NOC - SOU

2 stops19h 30mAer Lingus

Sat 30/816:25SOU - NOC

2 stops20h 10mAer Lingus

Deal found 9/7£591

Best flights from Ireland to Portsmouth
Discover carefully curated flight deals from Ireland to Portsmouth that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 11 July 2025.

Wed 20/806:25DUB - SOU

Nonstop1h 40mAer Lingus

Thu 28/820:00SOU - DUB

Nonstop1h 35mAer Lingus

Deal found 10/7£72

Wed 20/806:25DUB - SOU

Nonstop1h 40mMultiple Airlines

Thu 28/811:25SOU - DUB

1 stop7h 25mMultiple Airlines

Deal found 10/7£117

Tue 19/820:45DUB - SOU

1 stop12h 00mKLM

Tue 26/817:35SOU - DUB

1 stop4h 50mKLM

Deal found 10/7£174

Mon 25/814:00ORK - SOU

2 stops18h 25mMultiple Airlines

Mon 1/911:50SOU - ORK

2 stops21h 10mMultiple Airlines

Deal found 11/7£241

Thu 24/717:20ORK - SOU

1 stop15h 25mKLM

Mon 28/718:25SOU - ORK

1 stop22h 25mKLM

Deal found 9/7£364

Sat 23/813:05NOC - SOU

2 stops19h 30mAer Lingus

Sat 30/816:25SOU - NOC

2 stops20h 10mAer Lingus

Deal found 9/7£591

Direct flights from Ireland to Portsmouth
Explore direct flight options from Ireland to Portsmouth based on user searches, and compare prices and availability for your desired travel dates. Data last updated 11 July 2025.

Wed 20/806:25DUB - SOU

Nonstop1h 40mAer Lingus

Thu 28/820:00SOU - DUB

Nonstop1h 35mAer Lingus

Deal found 10/7£72

Tue 18/1118:00DUB - SOU

Nonstop1h 40mBritish Airways

Thu 20/1120:10SOU - DUB

Nonstop1h 40mBritish Airways

Deal found 10/7£230

Last-minute flights from Ireland to Portsmouth
Discover last-minute flight deals from Ireland to Portsmouth. Data last updated 11 July 2025 and is based on user searches.

Thu 17/707:00DUB - SOU

Nonstop1h 40mBritish Airways

Mon 21/720:00SOU - DUB

Nonstop1h 35mBritish Airways

Deal found 10/7£260

Sat 19/717:15ORK - SOU

1 stop15h 30mKLM

Mon 21/718:25SOU - ORK

1 stop22h 25mKLM

Deal found 9/7£321

Sat 19/707:00DUB - SOU

Nonstop1h 40mMultiple Airlines

Sun 20/717:35SOU - DUB

1 stop16h 50mMultiple Airlines

Deal found 9/7£333

Sat 19/719:05ORK - SOU

2 stops19h 15mMultiple Airlines

Mon 21/715:05SOU - ORK

2 stops8h 40mMultiple Airlines

Deal found 9/7£496

Tue 19/820:45DUB - SOU

1 stop12h 00mKLM

Tue 26/817:35SOU - DUB

1 stop4h 50mKLM

Deal found 10/7£174

Wed 20/806:25DUB - SOU

Nonstop1h 40mAer Lingus

Thu 28/820:00SOU - DUB

Nonstop1h 35mAer Lingus

Deal found 10/7£72

Wed 20/806:25DUB - SOU

Nonstop1h 40mMultiple Airlines

Thu 28/811:25SOU - DUB

1 stop7h 25mMultiple Airlines

Deal found 10/7£117

Sat 23/813:05NOC - SOU

2 stops19h 30mAer Lingus

Sat 30/816:25SOU - NOC

2 stops20h 10mAer Lingus

Deal found 9/7£591

Mon 25/814:00ORK - SOU

2 stops18h 25mMultiple Airlines

Mon 1/911:50SOU - ORK

2 stops21h 10mMultiple Airlines

Deal found 11/7£241

One-way flights from Ireland to Portsmouth
Search for one-way flight options from Ireland to Portsmouth. Find affordable one-way fares based on user searches. Data last updated 11 July 2025.

Wed 13/806:25DUB - SOU

Nonstop1h 40mAer Lingus

Deal found 8/7£50

Fri 29/808:10DUB - SOU

1 stop7h 30mMultiple Airlines

Deal found 8/7£77

Wed 13/805:55DUB - SOU

1 stop11h 55mKLM

Deal found 8/7£91

Sun 7/911:30ORK - SOU

1 stop23h 05mMultiple Airlines

Deal found 11/7£99

Sun 27/706:55DUB - SOU

Nonstop1h 40mBritish Airways

Deal found 9/7£107

Sun 31/814:20DUB - SOU

1 stop17h 10mAurigny Air

Deal found 10/7£188

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

DublinSouthampton

DUB - SOU

DUBSOU

Dublin

Wed 20/8

06:25-08:05

Nonstop1h 40m

Southampton Eastleigh

Thu 28/8

20:00-21:35

Nonstop1h 35m

£72

DublinSouthampton

DUB - SOU

DUBSOU

Dublin

Wed 20/8

06:25-08:05

Nonstop1h 40m

Southampton Eastleigh

Thu 28/8

11:25-18:50

1 stop7h 25m

£117

DublinSouthampton

DUB - SOU

DUBSOU

Dublin

Tue 19/8

20:45-08:45

1 stop12h 00m

Southampton Eastleigh

Tue 26/8

17:35-22:25

1 stop4h 50m

£174

CorkSouthampton

ORK - SOU

ORKSOU

Cork

Mon 25/8

14:00-08:25

2 stops18h 25m

Southampton Eastleigh

Mon 1/9

11:50-09:00

2 stops21h 10m

£241

CorkSouthampton

ORK - SOU

ORKSOU

Cork

Thu 24/7

17:20-08:45

1 stop15h 25m

Southampton Eastleigh

Mon 28/7

18:25-16:50

1 stop22h 25m

£364

KnockSouthampton

NOC - SOU

NOCSOU

Knock Intl

Sat 23/8

13:05-08:35

2 stops19h 30m

Southampton Eastleigh

Sat 30/8

16:25-12:35

2 stops20h 10m

£591

DublinSouthampton

DUB - SOU

DUBSOU

Dublin

Wed 13/8

06:25-08:05

Nonstop1h 40m

£50

DublinSouthampton

DUB - SOU

DUBSOU

Dublin

Fri 29/8

08:10-15:40

1 stop7h 30m

£77

DublinSouthampton

DUB - SOU

DUBSOU

Dublin

Wed 13/8

05:55-17:50

1 stop11h 55m

£91

CorkSouthampton

ORK - SOU

ORKSOU

Cork

Sun 7/9

11:30-10:35

1 stop23h 05m

£99

Flights are sorted by cheapest return flights first.

Deals found on 8/7

Showing 1-10 of 12 results

Best time to book a flight from Ireland to Portsmouth

Have a flexible travel schedule? Discover the best time to fly to Portsmouth from Ireland 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 Ireland to Portsmouth

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

Currently, January is the cheapest month in which you can book a flight from Ireland to Portsmouth (average of £112). Flying from Ireland to Portsmouth in August is currently the most expensive (average of £164). 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 IE to P0R?

When flying from Ireland to Portsmouth, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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

Travellers seeking maximum savings on their Ireland to Portsmouth flight should consider departing on Tuesday mornings when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Ireland to Portsmouth

The most flights from IE0 to P0R are scheduled on a Thursday (84 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (38 on average).

Reviews of airlines servicing Portsmouth

See what other customers who have flown with KLM, Aer Lingus, andBritish Airways from Ireland to Portsmouth 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

1,372 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

1,372 reviews

KLM

7.8

Good

1,372 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

1,154 reviews

KLM

7.8

Good

1,372 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

7,109 reviews

KLM

7.8

Good

1,372 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 Ireland to Portsmouth one-way?
One-way options have recently been found by users for as low as £50 on Aer Lingus. Other airlines that offer cheap prices include KLM from £91 and British Airways from £107 one-way.
What are the most popular routes from Ireland to Portsmouth?
When deciding which route to take from Ireland to Portsmouth consider Dublin - Southampton Eastleigh, Cork - Southampton Eastleigh or Knock Intl - Southampton Eastleigh as they are the most popular.
What are the most reliable airlines from Ireland to Portsmouth?
Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Ireland to Portsmouth on time: Air Canada (81%), British Airways (79%), Aer Lingus (78%).
What are the cheapest flights from Ireland to Portsmouth?
The cheapest flight price from Ireland to Portsmouth is £52. On average you can expect to pay £1,296. The most popular route, (Dublin - Southampton Eastleigh), can usually be booked for £72.
Can I find deals for flights from Ireland to Portsmouth that include hotel bookings?
Yes. In addition to deals on Ireland to Portsmouth flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Ireland to Portsmouth?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ireland to Portsmouth.
Can I find deals for business class flights from Ireland to Portsmouth?
Yes. Cheapflights offers flight deals from Ireland to Portsmouth 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 Ireland to Portsmouth?
Currently, January is the cheapest month in which you can book a flight from Ireland to Portsmouth (average of £112). Flying from Ireland to Portsmouth in August is currently the most expensive (average of £164). 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

Top 3 airlines flying from Ireland to Portsmouth

Airline	Cheapest	Average	Flexibility	On-time
Ryanair	Cheapest£26	Average£66	FlexibilityNo cancel fee	On-timeN/A	Search Ryanair flights
British Airways	Cheapest£57	Average£133	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Aer Lingus	Cheapest£64	Average£134	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights

Fly with Cheapflights

How does Cheapflights help users find flights from Ireland to Portsmouth?

Cheapflights makes it easy to find Ireland to Portsmouth flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

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

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Ireland to Portsmouth.

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

Yes! Cheapflights helps users easily find flights from Ireland to Portsmouth with no change fees.

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

Not ready to book yet? You can track prices for flights from Ireland to Portsmouth on Cheapflights with our Price Alert feature and get notified when better prices are available.

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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 Ireland to Portsmouth from £50

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 13/8. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Ireland to Portsmouth

Keep the following information in mind while searching for Ireland to Portsmouth flight deals. Data was last updated 11 July 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Ireland to Portsmouth

Cheapest flights from Ireland to PortsmouthExplore the most affordable flight options available from Ireland to Portsmouth. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 July 2025.

Explore the most affordable flight options available from Ireland to Portsmouth. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 July 2025.

Cheapflights Fare Finder

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

Best time to book a flight from Ireland to Portsmouth

Have a flexible travel schedule? Discover the best time to fly to Portsmouth from Ireland with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Ireland to Portsmouth

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

What is the cheapest time of day to fly from IE to P0R?

Find hourly flight availability from Ireland to Portsmouth. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 11 July 2025.

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

Use this chart to determine the cheapest time to fly return from Ireland to Portsmouth. Price data was last updated on 16 December 2024.

Weekly flight availability from Ireland to Portsmouth

Explore weekly flight availability from Ireland to Portsmouth. 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 11 July 2025.

Reviews of airlines servicing Portsmouth

See what other customers who have flown with KLM, Aer Lingus, andBritish Airways from Ireland to Portsmouth 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 Ireland to Portsmouth. 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 Ireland to Portsmouth one-way?

What are the most popular routes from Ireland to Portsmouth?

What are the most reliable airlines from Ireland to Portsmouth?

What are the cheapest flights from Ireland to Portsmouth?

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

How can I find direct flights from Ireland to Portsmouth?

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

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

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 Ireland to Portsmouth

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

Top 3 airlines flying from Ireland to Portsmouth

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 Ireland to Portsmouth?

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

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

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

100% Free

Book with Flexibility

Travel Smart

Cheapest flights from Ireland to Portsmouth
Explore the most affordable flight options available from Ireland to Portsmouth. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 July 2025.