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Cheap flights from Ireland to Portsmouth from £47

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 7/12. Fares are subject to change and may not be available on all flights or dates of travel.
DUB — LHR
29 Jul — 5 Aug1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Ireland to Portsmouth

Enter your travel dates to find the best prices.

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 29 June 2026.

Sun 16/806:55
DUB
-
SOU
Nonstop1h 40m
Aer Lingus
Sat 22/820:00
SOU
-
DUB
Nonstop1h 35m
Aer Lingus
Deal found 28/6£97
Mon 10/807:00
DUB
-
SOU
Nonstop1h 40m
Aer Lingus
Sat 15/820:00
SOU
-
DUB
Nonstop1h 35m
Aer Lingus
Deal found 24/6£98
Thu 6/807:00
DUB
-
SOU
Nonstop1h 40m
Aer Lingus
Wed 19/820:00
SOU
-
DUB
Nonstop1h 35m
Aer Lingus
Deal found 25/6£99
Tue 4/807:00
DUB
-
SOU
Nonstop1h 40m
Aer Lingus
Thu 6/817:20
SOU
-
DUB
Nonstop1h 35m
Aer Lingus
Deal found 28/6£100
Thu 23/707:00
DUB
-
SOU
Nonstop1h 40m
Aer Lingus
Sun 26/709:20
SOU
-
DUB
Nonstop1h 40m
Aer Lingus
Deal found 29/6£101
Tue 28/717:50
DUB
-
SOU
Nonstop1h 40m
Aer Lingus
Wed 29/720:00
SOU
-
DUB
Nonstop1h 35m
Aer Lingus
Deal found 27/6£101
Thu 16/707:00
DUB
-
SOU
Nonstop1h 40m
Aer Lingus
Mon 20/720:00
SOU
-
DUB
Nonstop1h 35m
Aer Lingus
Deal found 24/6£102
Thu 6/807:00
DUB
-
SOU
Nonstop1h 40m
Aer Lingus
Sun 24/120:00
SOU
-
DUB
Nonstop1h 35m
Aer Lingus
Deal found 26/6£103
Sun 16/806:55
DUB
-
SOU
Nonstop1h 40m
Multiple Airlines
Sat 22/807:50
SOU
-
DUB
1 stop7h 10m
Multiple Airlines
Deal found 26/6£104
Sat 11/718:00
ORK
-
SOU
2 stops14h 35m
Multiple Airlines
Mon 13/720:40
SOU
-
ORK
2 stops25h 05m
Multiple Airlines
Deal found 26/6£178
Wed 5/817:15
ORK
-
SOU
2 stops17h 50m
Multiple Airlines
Sat 8/806:45
SOU
-
ORK
1 stop4h 10m
Multiple Airlines
Deal found 27/6£186
Tue 28/722:25
ORK
-
SOU
2 stops21h 05m
Multiple Airlines
Tue 4/820:00
SOU
-
ORK
2 stops20h 35m
Multiple Airlines
Deal found 28/6£195

Find flight deals from Ireland to Portsmouth

Keep the following information in mind while searching for Ireland to Portsmouth flight deals. Data was last updated 29 June 2026.

Round-trip from

£97

One-way from

£47

Popular in

July

Cheapest in

January

Average price

£98
Aer Lingus
  • Aer Lingus
  • 16/8-22/8
  • Nonstop
  • 3h 15m total
  • Ireland to Portsmouth
Search Deals
Aer Lingus
  • Aer Lingus
  • 7/12
  • Nonstop
  • 1h 40m total
  • Ireland to Portsmouth
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£9 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 June 2026
Search Deals

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 29 June 2026.
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

Cheapest return flight

DublinSouthampton

DUB - SOU

DUBSOU

Dublin

Sun 16/8

06:55-08:35

Nonstop1h 40m

Southampton Eastleigh

Sat 22/8

07:50-15:00

1 stop7h 10m

£104

DublinSouthampton

DUB - SOU

DUBSOU

Dublin

Thu 16/7

07:40-11:05

1 stop3h 25m

Southampton Eastleigh

Mon 20/7

20:00-21:35

Nonstop1h 35m

£146

DublinSouthampton

DUB - SOU

DUBSOU

Dublin

Mon 3/8

07:00-08:40

Nonstop1h 40m

Southampton Eastleigh

Mon 10/8

09:20-11:00

Nonstop1h 40m

£158

DublinSouthampton

DUB - SOU

DUBSOU

Dublin

Thu 20/8

05:55-17:35

1 stop11h 40m

Southampton Eastleigh

Thu 27/8

18:05-22:25

1 stop4h 20m

£159

CorkSouthampton

ORK - SOU

ORKSOU

Cork

Sat 11/7

18:00-08:35

2 stops14h 35m

Southampton Eastleigh

Mon 13/7

20:40-21:45

2 stops25h 05m

£178

CorkSouthampton

ORK - SOU

ORKSOU

Cork

Thu 6/8

21:00-07:20

2 stops34h 20m

Southampton Eastleigh

Thu 13/8

12:20-16:55

1 stop4h 35m

£193

CorkSouthampton

ORK - SOU

ORKSOU

Cork

Wed 5/8

17:15-11:05

2 stops17h 50m

Southampton Eastleigh

Sat 8/8

07:50-08:45

2 stops24h 55m

£193

CorkSouthampton

ORK - SOU

ORKSOU

Cork

Mon 10/8

20:55-19:30

2 stops22h 35m

Southampton Eastleigh

Mon 17/8

12:25-08:05

2 stops19h 40m

£195

CorkSouthampton

ORK - SOU

ORKSOU

Cork

Tue 28/7

17:45-19:30

2 stops25h 45m

Southampton Eastleigh

Tue 4/8

12:20-21:45

1 stop9h 25m

£198

KnockSouthampton

NOC - SOU

NOCSOU

Knock Intl

Sun 12/7

15:40-08:40

2 stops17h 00m

Southampton Eastleigh

Thu 16/7

20:00-09:25

2 stops13h 25m

£208

Flights are sorted by cheapest return flights first.

Deals found on 24/6

Showing 1-10 of 33 resultsSorted by cheapest first
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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 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 29 June 2026.

When flying from Ireland to Portsmouth, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 35% versus a flight in the afternoon.

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 29 June 2026.

The most flights from IE0 to P0R are scheduled on a Friday (80 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (56 on average).

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 27 June 2026.

Travellers seeking maximum savings on their Ireland to Portsmouth flight should consider departing on Saturday afternoons 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 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 29 June 2026.
See what other customers who have flown with Aer Lingus 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.
Aer Lingus
7.3
Good
1,633 reviews
Check prices

Overall

7.3

Entertainment

7.0

Crew

8.1

Boarding

7.4

Comfort

7.2

Food

6.7

Reviews

1 / 20
4.0
Okay

Lama,May 2026

DUB - ALC

Seats were super small, there was no food, and they lost my bag.
Aer Lingus
7.3
Good
1,633 reviews
Aer Lingus
7.3
Good
1,633 reviews
Check prices

Overall

7.3

Entertainment

7.0

Crew

8.1

Boarding

7.4

Comfort

7.2

Food

6.7

Reviews

1 / 20
4.0
Okay

Lama,May 2026

DUB - ALC

Seats were super small, there was no food, and they lost my bag.

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.

  • How long is the flight from Ireland to Portsmouth?

    Departing from Ireland to Portsmouth will take you 1h 40m. The distance between Ireland and Portsmouth is about 268 mi. This flight may include one or multiple stops.

  • 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 (84%), Aer Lingus (78%), British Airways (77%).

  • What are the cheapest flights from Ireland to Portsmouth?

    The cheapest flight price from Ireland to Portsmouth is £57. On average you can expect to pay £1,137. The most popular route, (Dublin - Southampton Eastleigh), can usually be booked for £97.

  • 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.

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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Frankfurt to Gatwick flights
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Vienna to Gatwick flights
Duesseldorf Intl to Luton flights
Frederic Chopin to Luton flights
Gatwick to Edinburgh flights
Malpensa to Gatwick flights
Malpensa to Luton flights
Malpensa to Heathrow flights
Vienna to London City flights
Duesseldorf Intl to London City flights
Madrid to Gatwick flights
Amsterdam to London City flights
Vienna to Heathrow flights
Orly to Luton flights
Dublin to Gatwick flights
Malpensa to Stansted flights
Frederic Chopin to Gatwick flights
Nice to Luton flights
Malpensa to London City flights
Madrid to Stansted flights
Vienna to Luton flights
Bergamo to Stansted flights
Madrid to Heathrow flights
Dublin to Heathrow flights
Dublin to Stansted flights
Dublin to Luton flights
Amsterdam to Heathrow flights

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 29 June 2026.
AirlineCheapestAverageFlexibilityOn-time
RyanairCheapest£28Average£89FlexibilityNo cancel feeOn-timeN/A
Search Ryanair flights
British AirwaysCheapest£75Average£159FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Aer LingusCheapest£84Average£144FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus 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 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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