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Cheap flights from Portsmouth to Dublin from £36

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 30/3. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — DUB
7 Mar — 14 Mar1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Portsmouth to Dublin are usually found in February or January, booked 28 days in advance, depart on a Tuesday or Wednesday and return on a Tuesday

Cheap flight deals from Portsmouth to Dublin

Enter your travel dates to find the best prices.

Cheapest flights from Portsmouth to Dublin
Explore the most affordable flight options available from Portsmouth to Dublin. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 5 February 2026.

Thu 5/320:10
SOU
-
DUB
Nonstop1h 40m
Aer Lingus
Mon 9/307:00
DUB
-
SOU
Nonstop1h 45m
Aer Lingus
Deal found 2/2£102
Wed 11/216:05
SOU
-
DUB
Nonstop1h 35m
Aer Lingus
Fri 13/207:00
DUB
-
SOU
Nonstop1h 45m
Aer Lingus
Deal found 4/2£104
Thu 19/320:10
SOU
-
DUB
Nonstop1h 40m
Aer Lingus
Thu 26/307:00
DUB
-
SOU
Nonstop1h 45m
Aer Lingus
Deal found 2/2£107
Tue 3/312:25
SOU
-
DUB
Nonstop1h 35m
Aer Lingus
Tue 10/313:55
DUB
-
SOU
Nonstop1h 40m
Aer Lingus
Deal found 3/2£108
Thu 12/320:10
SOU
-
DUB
Nonstop1h 40m
Aer Lingus
Sun 15/307:00
DUB
-
SOU
Nonstop1h 45m
Aer Lingus
Deal found 3/2£110
Mon 9/220:10
SOU
-
DUB
Nonstop1h 40m
Aer Lingus
Wed 11/210:10
DUB
-
SOU
Nonstop1h 45m
Aer Lingus
Deal found 4/2£111
Mon 23/216:05
SOU
-
DUB
Nonstop1h 35m
Aer Lingus
Thu 26/207:00
DUB
-
SOU
Nonstop1h 45m
Aer Lingus
Deal found 2/2£112
Tue 3/309:20
SOU
-
DUB
1 stop23h 25m
Multiple Airlines
Tue 10/313:55
DUB
-
SOU
Nonstop1h 40m
Multiple Airlines
Deal found 3/2£113
Thu 5/320:10
SOU
-
DUB
Nonstop1h 40m
Aer Lingus
Thu 12/307:00
DUB
-
SOU
Nonstop1h 45m
Aer Lingus
Deal found 3/2£114

Find flight deals from Portsmouth to Dublin

Keep the following information in mind while searching for Portsmouth to Dublin flight deals. Data was last updated 5 February 2026.

Round-trip from

£102

One-way from

£36

Popular in

June

Cheapest in

February

Average price

£119
Aer Lingus
  • Aer Lingus
  • 5/3-9/3
  • Nonstop
  • 3h 25m total
  • Portsmouth to Dublin
Search Deals
Aer Lingus
  • Aer Lingus
  • 30/3
  • Nonstop
  • 1h 35m total
  • Portsmouth to Dublin
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (£12 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£3 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Portsmouth to Dublin 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 5 February 2026.
Use the filters below to find and compare flights from Portsmouth to Dublin that are best for you.

Fly from

Portsmouth

Fly to

Dublin

Route

Depart

Return

Price

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

Thu 26/2

16:05-17:40

Nonstop1h 35m

Dublin

Mon 2/3

07:00-08:45

Nonstop1h 45m

£111

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

Tue 14/4

09:10-10:50

Nonstop1h 40m

Dublin

Wed 15/4

17:50-19:30

Nonstop1h 40m

£116

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

Fri 6/3

20:10-21:50

Nonstop1h 40m

Dublin

Fri 13/3

08:50-17:00

1 stop8h 10m

£122

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

Sun 29/3

20:00-21:35

Nonstop1h 35m

Dublin

Tue 31/3

07:00-08:40

Nonstop1h 40m

£123

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

Thu 26/2

16:05-17:40

Nonstop1h 35m

Dublin

Mon 2/3

19:05-08:50

1 stop13h 45m

£134

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

Fri 20/2

20:10-21:50

Nonstop1h 40m

Dublin

Mon 23/2

19:05-08:50

1 stop13h 45m

£138

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

Thu 26/2

08:50-12:40

1 stop3h 50m

Dublin

Sun 1/3

05:55-08:20

1 stop26h 25m

£145

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

Fri 24/7

18:05-22:25

1 stop4h 20m

Dublin

Thu 30/7

05:55-17:35

1 stop11h 40m

£145

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

Thu 5/3

12:20-07:05

2 stops18h 45m

Dublin

Mon 9/3

20:35-08:50

1 stop12h 15m

£148

SouthamptonDublin

SOU - DUB

SOUDUB

Southampton Eastleigh

Thu 19/3

17:55-22:25

1 stop4h 30m

Dublin

Thu 26/3

05:45-17:20

1 stop11h 35m

£151

Flights are sorted by cheapest return flights first.

Deals found on 4/2

Showing 1-10 of 22 results
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2
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Best time to book a flight from Portsmouth to Dublin

Have a flexible travel schedule? Discover the best time to fly to Dublin 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 Dublin

How far ahead should I book a flight from Portsmouth to Dublin?

Use this chart to determine the optimal time to book a return flight from Portsmouth to Dublin. Price data was last updated on 30 January 2026.

The best time to book flights from Portsmouth to Dublin is 28 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, January is the cheapest month in which you can book a flight from Portsmouth to Dublin (average of £25). Flying from Portsmouth to Dublin in December is currently the most expensive (average of £39). 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 DUB?

Find hourly flight availability from Portsmouth to Dublin. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 5 February 2026.

A simple way to save on the total cost of your ticket is to fly from Portsmouth to Dublin in the afternoon. If you’re flexible enough to do this you can expect to save up to 38% on your trip compared to booking a flight in the morning.

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

Use this chart to determine the cheapest time to fly return from Portsmouth to Dublin. Price data was last updated on 31 January 2026.

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

Weekly flight availability from Portsmouth to Dublin

Explore weekly flight availability from Portsmouth to Dublin. 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 5 February 2026.

The most flights from P0R to DUB are scheduled on a Wednesday (62 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (30 on average).

Reviews of airlines servicing Dublin

Get insights into the airlines that provide service to Dublin. 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 Dublin. Reviews last updated 5 February 2026.
Read reviews from past customers who have flown with KLM, Aer Lingus, andRyanair from Portsmouth to Dublin. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.7
Good
1,448 reviews
Check prices

Food

7.3

Comfort

7.6

Overall

7.7

Boarding

7.8

Crew

8.4

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
KLM
7.7
Good
1,448 reviews
KLM
7.7
Good
1,448 reviews
Check prices

Food

7.3

Comfort

7.6

Overall

7.7

Boarding

7.8

Crew

8.4

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
Aer Lingus
7.2
Good
1,445 reviews
KLM
7.7
Good
1,448 reviews
Check prices

Food

7.3

Comfort

7.6

Overall

7.7

Boarding

7.8

Crew

8.4

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
Ryanair
6.9
Okay
5,261 reviews
KLM
7.7
Good
1,448 reviews
Check prices

Food

7.3

Comfort

7.6

Overall

7.7

Boarding

7.8

Crew

8.4

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
British Airways
6.7
Okay
7,716 reviews
KLM
7.7
Good
1,448 reviews
Check prices

Food

7.3

Comfort

7.6

Overall

7.7

Boarding

7.8

Crew

8.4

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.

Related info for your journey

Find useful and relevant information for your journey from Portsmouth to Dublin. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Dublin from Portsmouth?

    If you book a flight to Dublin from Portsmouth, you will be flying to Dublin, which is the city’s only airport. Dublin (DUB) is located 5.7 mi from the center of Dublin. There are 5 flights from Portsmouth to Dublin per day from 4 different airlines.

  • How long is the flight from Portsmouth to Dublin?

    There are many flights that can get you from Portsmouth to Dublin in 1h 35m. Fly via Aer Lingus to get the fastest option. Airlines will cover a distance of 268 mi. Most flights are nonstop.

  • What are the most reliable airlines from Portsmouth to Dublin?

    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 Portsmouth to Dublin on time: Japan Airlines (86%), Kenya Airways (86%), LATAM Airlines (79%).

  • What are the cheapest flights from Portsmouth to Dublin?

    Looking at all options, your cheapest flight can be booked for £50. While the most popular route (Southampton Eastleigh - Dublin) can be booked for £73 on average, our data indicates £925 when flying from Portsmouth to Dublin.

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

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

  • How can I find direct flights from Portsmouth to Dublin?

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

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

    Yes. Cheapflights offers flight deals from Portsmouth to Dublin 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 Dublin?

    Currently, January is the cheapest month in which you can book a flight from Portsmouth to Dublin (average of £25). Flying from Portsmouth to Dublin in December is currently the most expensive (average of £39). 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

Travelling to a place near Dublin?

Book flights to Dublin if you plan to visit one of these locations
Athlone
Tullamore
Arklow
Cavan
Portmarnock
Dundalk
Wicklow
Enniscorthy
Bray
Mullingar
Drogheda
Kildare
Malahide
Maynooth
Carlingford
Swords
Naas

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.

Top 4 airlines flying from Portsmouth to Dublin

Discover the top 4 airlines that operate flights from Portsmouth to Dublin. 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 5 February 2026.
AirlineCheapestAverageFlexibilityOn-time
RyanairCheapest£28Average£79FlexibilityNo cancel feeOn-timeN/A
Search Ryanair flights
Aer LingusCheapest£66Average£144FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
British AirwaysCheapest£67Average£158FlexibilityNo cancel feeOn-time70%
Search British Airways flights
KLMCheapest£133Average£144FlexibilityNo cancel feeOn-time75%
Search KLM flights

Fly with Cheapflights

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

Cheapflights makes it easy to find Portsmouth to Dublin 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 Portsmouth to Dublin?

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 Portsmouth to Dublin.

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

Users can book flights with no change fees policies with our dedicated filters. Book flights from Portsmouth to Dublin flexibly with Cheapflights today.

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

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