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Cheap flights from Ireland to Portsmouth from £42

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 24/9. Fares are subject to change and may not be available on all flights or dates of travel.
DUB — LHR
7 Apr — 14 Apr1
1 adult

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 2 April 2025.

Round-trip from

£53

One-way from

£42

Popular in

May

Cheapest in

January

Average price

£97
Aer Lingus
  • Aer Lingus
  • 14/5-21/5
  • Nonstop
  • 3h 15m total
  • Ireland to Portsmouth
Search Deals
Aer Lingus
  • Aer Lingus
  • 24/9
  • Nonstop
  • 1h 40m total
  • Ireland to Portsmouth
Search Deals
Highest demand for flights based on searches. 14% potential increase in price (£11 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£2 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 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 2 April 2025.

Wed 14/506:25DUB - SOU
Nonstop1h 40mAer Lingus
Wed 21/520:00SOU - DUB
Nonstop1h 35mAer Lingus
Deal found 1/4£53
Mon 19/512:45DUB - SOU
1 stop23h 00mMultiple Airlines
Wed 21/520:00SOU - DUB
Nonstop1h 35mMultiple Airlines
Deal found 2/4£96
Fri 18/420:45DUB - SOU
1 stop12h 00mKLM
Tue 22/417:35SOU - DUB
1 stop4h 50mKLM
Deal found 2/4£171
Thu 15/506:00ORK - SOU
2 stops36h 55mMultiple Airlines
Thu 22/515:05SOU - ORK
2 stops26h 30mMultiple Airlines
Deal found 2/4£213
Thu 8/517:50DUB - SOU
Nonstop1h 40mBritish Airways
Mon 12/520:00SOU - DUB
Nonstop1h 35mBritish Airways
Deal found 2/4£227
Tue 12/812:45DUB - SOU
1 stop18h 45mAurigny Air
Wed 13/819:50SOU - DUB
1 stop16h 10mAurigny Air
Deal found 1/4£269
Thu 15/506:00ORK - SOU
1 stop26h 45mKLM
Thu 22/517:35SOU - ORK
1 stop5h 55mKLM
Deal found 2/4£275
Fri 1/813:00DUB - SOU
1 stop6h 00mBlue Islands
Sun 3/820:00SOU - DUB
1 stop16h 20mBlue Islands
Deal found 1/4£405

Cheapflights Fare Finder

Customise your flight search to find flights from Ireland to Portsmouth 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 2 April 2025.
Use the filters below to find and compare flights from Ireland to Portsmouth that are best for you.

Fly from

Ireland

Fly to

Portsmouth

Route

Depart

Return

Price

DublinSouthampton

DUB - SOU

DUBSOU

Dublin

Wed 14/5

06:25-08:05

Nonstop1h 40m

Southampton Eastleigh

Wed 21/5

20:00-21:35

Nonstop1h 35m

£53

DublinSouthampton

DUB - SOU

DUBSOU

Dublin

Mon 19/5

12:45-11:45

1 stop23h 00m

Southampton Eastleigh

Wed 21/5

20:00-21:35

Nonstop1h 35m

£96

DublinSouthampton

DUB - SOU

DUBSOU

Dublin

Fri 18/4

20:45-08:45

1 stop12h 00m

Southampton Eastleigh

Tue 22/4

17:35-22:25

1 stop4h 50m

£171

CorkSouthampton

ORK - SOU

ORKSOU

Cork

Thu 15/5

06:00-18:55

2 stops36h 55m

Southampton Eastleigh

Thu 22/5

15:05-17:35

2 stops26h 30m

£213

DublinSouthampton

DUB - SOU

DUBSOU

Dublin

Thu 8/5

14:45-16:35

Nonstop1h 50m

Southampton Eastleigh

Mon 12/5

20:00-21:35

Nonstop1h 35m

£227

DublinSouthampton

DUB - SOU

DUBSOU

Dublin

Tue 12/8

12:45-07:30

1 stop18h 45m

Southampton Eastleigh

Wed 13/8

19:50-12:00

1 stop16h 10m

£269

CorkSouthampton

ORK - SOU

ORKSOU

Cork

Thu 15/5

06:00-08:45

1 stop26h 45m

Southampton Eastleigh

Thu 22/5

17:35-23:30

1 stop5h 55m

£275

DublinSouthampton

DUB - SOU

DUBSOU

Dublin

Fri 1/8

13:00-19:00

1 stop6h 00m

Southampton Eastleigh

Sun 3/8

20:00-12:20

1 stop16h 20m

£405

DublinSouthampton

DUB - SOU

DUBSOU

Dublin

Wed 24/9

06:25-08:05

Nonstop1h 40m

£42

DublinSouthampton

DUB - SOU

DUBSOU

Dublin

Sat 17/5

08:00-17:30

1 stop9h 30m

£64

Flights are sorted by cheapest return flights first.

Deals found on 2/4

Showing 1-10 of 13 results
1
2

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?

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 2 April 2025.

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?

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

Travellers seeking maximum savings on their Ireland to Portsmouth flight should consider departing on Wednesday mornings 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 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 2 April 2025.

The most flights from IE0 to P0R are scheduled on a Monday (76 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (39 on average).

Rainfall in Portsmouth by month

Plan your trip to Portsmouth by taking into account the average rainfall totals by month.

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.

Temperature in Portsmouth by month

Plan your trip to Portsmouth by taking into account the average temperature totals by month.

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).

Reviews of airlines servicing Portsmouth

Get insights into the airlines that provide service to Portsmouth. 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 Portsmouth. Reviews last updated 2 April 2025.
Read through reviews of airlines operating flights from Ireland to Portsmouth, such as KLM, Aer Lingus and British Airways. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.8
Good
1,323 reviews
Check prices

Food

7.3

Crew

8.4

Boarding

7.8

Overall

7.8

Comfort

7.7

Entertainment

7.2

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
KLM
7.8
Good
1,323 reviews
KLM
7.8
Good
1,323 reviews
Check prices

Food

7.3

Crew

8.4

Boarding

7.8

Overall

7.8

Comfort

7.7

Entertainment

7.2

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
Aer Lingus
7.0
Good
1,060 reviews
KLM
7.8
Good
1,323 reviews
Check prices

Food

7.3

Crew

8.4

Boarding

7.8

Overall

7.8

Comfort

7.7

Entertainment

7.2

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
British Airways
6.6
Okay
6,718 reviews
KLM
7.8
Good
1,323 reviews
Check prices

Food

7.3

Crew

8.4

Boarding

7.8

Overall

7.8

Comfort

7.7

Entertainment

7.2

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.

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?

    One-way options have recently been found by users for as low as £42 on Aer Lingus. Other airlines that offer cheap prices include KLM from £85 and British Airways from £104 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 (85%), British Airways (84%), Aer Lingus (84%).

  • What are the cheapest flights from Ireland to Portsmouth?

    The cheapest flight price from Ireland to Portsmouth is £45. On average you can expect to pay £1,577. The most popular route, (Dublin - Southampton Eastleigh), can usually be booked for £53.

  • 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

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Alternative routes for Ireland to Portsmouth

See prices for flight routes from nearby airports that may be better suited for you.
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Top 3 airlines flying from Ireland to Portsmouth

Discover the top 3 airlines that operate flights from Ireland to Portsmouth. 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 2 April 2025.
AirlineCheapestAverageFlexibilityOn-time
RyanairCheapest£27Average£78FlexibilityNo cancel feeOn-timeN/A
Search Ryanair flights
British AirwaysCheapest£59Average£126FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Aer LingusCheapest£64Average£128FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights

Fly with Cheapflights

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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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