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Cheap flights from Dublin to Portsmouth from £31

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 9/6. Fares are subject to change and may not be available on all flights or dates of travel.
DUB — LHR
17 Jun — 24 Jun1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Dublin to Portsmouth are usually found in February or March, booked 23 days in advance, depart on a Tuesday or Monday and return on a Tuesday

Cheap flight deals from Dublin to Portsmouth

Enter your travel dates to find the best prices.

Cheapest flights from Dublin to Portsmouth
Explore the most affordable flight options available from Dublin to Portsmouth. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 May 2026.

Thu 4/607:00
DUB
-
SOU
Nonstop1h 40m
Aer Lingus
Mon 8/609:20
SOU
-
DUB
Nonstop1h 40m
Aer Lingus
Deal found 14/5£65
Tue 2/617:50
DUB
-
SOU
Nonstop1h 40m
Aer Lingus
Wed 10/620:00
SOU
-
DUB
Nonstop1h 35m
Aer Lingus
Deal found 14/5£66
Fri 12/617:50
DUB
-
SOU
Nonstop1h 40m
Aer Lingus
Sun 14/620:00
SOU
-
DUB
Nonstop1h 35m
Aer Lingus
Deal found 14/5£67
Thu 11/607:00
DUB
-
SOU
Nonstop1h 40m
Aer Lingus
Sun 14/620:00
SOU
-
DUB
Nonstop1h 35m
Aer Lingus
Deal found 18/5£68
Sat 23/517:50
DUB
-
SOU
Nonstop1h 40m
Aer Lingus
Mon 25/520:00
SOU
-
DUB
Nonstop1h 35m
Aer Lingus
Deal found 14/5£69
Sat 13/617:50
DUB
-
SOU
Nonstop1h 40m
Aer Lingus
Sun 14/620:00
SOU
-
DUB
Nonstop1h 35m
Aer Lingus
Deal found 14/5£70
Wed 10/606:05
DUB
-
SOU
Nonstop1h 35m
Aer Lingus
Wed 10/620:00
SOU
-
DUB
Nonstop1h 35m
Aer Lingus
Deal found 18/5£73
Thu 11/607:00
DUB
-
SOU
Nonstop1h 40m
Aer Lingus
Tue 16/620:00
SOU
-
DUB
Nonstop1h 35m
Aer Lingus
Deal found 15/5£82
Thu 21/507:00
DUB
-
SOU
Nonstop1h 40m
Aer Lingus
Sat 30/520:00
SOU
-
DUB
Nonstop1h 35m
Aer Lingus
Deal found 17/5£93
Mon 1/607:00
DUB
-
SOU
Nonstop1h 40m
Aer Lingus
Wed 3/620:00
SOU
-
DUB
Nonstop1h 35m
Aer Lingus
Deal found 16/5£94

Find flight deals from Dublin to Portsmouth

Keep the following information in mind while searching for Dublin to Portsmouth flight deals. Data was last updated 18 May 2026.

Round-trip from

£65

One-way from

£31

Popular in

June

Cheapest in

February

Average price

£158
Aer Lingus
  • Aer Lingus
  • 4/6-8/6
  • Nonstop
  • 3h 20m total
  • Dublin to Portsmouth
Search Deals
Aer Lingus
  • Aer Lingus
  • 9/6
  • Nonstop
  • 1h 40m total
  • Dublin to Portsmouth
Search Deals
Highest demand for flights based on searches. 20% potential increase in price (£26 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£4 potential savings vs. average return price).
Search Deals
Average for round-trip flights in May 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Dublin 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 18 May 2026.
Use the filters below to find and compare flights from Dublin to Portsmouth that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight
Fastest return journey

DublinSouthampton

DUB - SOU

DUBSOU

Dublin

Sat 13/6

17:50-19:30

Nonstop1h 40m

Southampton Eastleigh

Sun 14/6

20:00-21:35

Nonstop1h 35m

£70

DublinSouthampton

DUB - SOU

DUBSOU

Dublin

Thu 4/6

07:00-08:40

Nonstop1h 40m

Southampton Eastleigh

Mon 8/6

20:40-22:50

2 stops26h 10m

£122

DublinSouthampton

DUB - SOU

DUBSOU

Dublin

Fri 12/6

06:30-07:20

2 stops24h 50m

Southampton Eastleigh

Sun 14/6

20:00-21:35

Nonstop1h 35m

£128

DublinSouthampton

DUB - SOU

DUBSOU

Dublin

Mon 29/6

07:00-08:40

Nonstop1h 40m

Southampton Eastleigh

Mon 6/7

20:40-22:50

2 stops26h 10m

£139

DublinSouthampton

DUB - SOU

DUBSOU

Dublin

Tue 4/8

05:55-17:35

1 stop11h 40m

Southampton Eastleigh

Tue 18/8

18:05-22:25

1 stop4h 20m

£202

DublinSouthampton

DUB - SOU

DUBSOU

Dublin

Mon 1/6

07:00-08:40

Nonstop1h 40m

Southampton Eastleigh

Fri 5/6

20:00-21:35

Nonstop1h 35m

£247

DublinSouthampton

DUB - SOU

DUBSOU

Dublin

Sun 28/6

23:10-11:50

2 stops12h 40m

Southampton Eastleigh

Sun 5/7

14:45-23:25

1 stop8h 40m

£261

DublinSouthampton

DUB - SOU

DUBSOU

Dublin

Sat 6/6

07:00-08:40

Nonstop1h 40m

Southampton Eastleigh

Sun 7/6

20:00-21:35

Nonstop1h 35m

£280

DublinSouthampton

DUB - SOU

DUBSOU

Dublin

Tue 4/8

05:55-17:35

1 stop11h 40m

Southampton Eastleigh

Mon 17/8

18:05-22:25

1 stop4h 20m

£333

DublinSouthampton

DUB - SOU

DUBSOU

Dublin

Tue 4/8

20:25-12:55

2 stops16h 30m

Southampton Eastleigh

Tue 18/8

12:20-19:35

2 stops7h 15m

£338

Flights are sorted by cheapest return flights first.

Deals found on 16/5

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

Best time to book a flight from Dublin to Portsmouth

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

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

Find hourly flight availability from Dublin 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 18 May 2026.

It’s optimal to fly from Dublin to Portsmouth in the evening. By choosing this option you can save up to 48% on the cost of your flight, compared to a flight in the afternoon.

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

Use this chart to determine the cheapest time to fly return from Dublin to Portsmouth. Price data was last updated on 16 May 2026.

Travellers seeking maximum savings on their Dublin to Portsmouth flight should consider departing on Wednesday evenings 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.

Weekly flight availability from Dublin to Portsmouth

Explore weekly flight availability from Dublin 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 18 May 2026.

The most flights from DUB to P0R are scheduled on a Monday (81 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (40 on average).

How much does it cost for a return flight from Dublin to Portsmouth?

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 18 May 2026.
Get a feel of what it's like to fly with Aer Lingus from Dublin to Portsmouth by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Aer Lingus
7.3
Good
1,563 reviews
Check prices

Food

6.6

Comfort

7.2

Boarding

7.4

Crew

8.1

Entertainment

7.0

Overall

7.3

Reviews

1 / 20
10.0
Excellent

Henry,May 2026

CDG - DUB

The staff was friendly and efficient. The cabin was well maintained. The economy seats were comfortable. The fact that the flight was not packed contributed largely to this impression. We would fly Aer Lingus again!
Aer Lingus
7.3
Good
1,563 reviews
Aer Lingus
7.3
Good
1,563 reviews
Check prices

Food

6.6

Comfort

7.2

Boarding

7.4

Crew

8.1

Entertainment

7.0

Overall

7.3

Reviews

1 / 20
10.0
Excellent

Henry,May 2026

CDG - DUB

The staff was friendly and efficient. The cabin was well maintained. The economy seats were comfortable. The fact that the flight was not packed contributed largely to this impression. We would fly Aer Lingus again!

Related info for your journey

Find useful and relevant information for your journey from Dublin to Portsmouth. 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 from for flights from Dublin to Portsmouth?

    For a flight from Dublin to Portsmouth, you will be flying from Dublin. Dublin (DUB) is just 5.7 mi from the center of the city. Dublin is the only Dublin airport and it handles 5 outbound flights to Portsmouth per day. 3 airlines have flights to Portsmouth from Dublin on a regular basis.

  • How long is the flight from Dublin to Portsmouth?

    There are many flights that can get you from Dublin to Portsmouth in 1h 40m. Fly via Aer Lingus to get the fastest option. The distance between Dublin and Portsmouth is about 268 mi. All flights are typically direct.

  • What are the most reliable airlines from Dublin 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 Dublin to Portsmouth on time: Air Canada (91%), Qatar Airways (84%), British Airways (82%).

  • What are the cheapest flights from Dublin to Portsmouth?

    Looking for the cheapest flight from Dublin to Portsmouth? While on average our users pay £1,296, our data indicates the cheapest price to be £60. The most popular route (Dublin - Southampton Eastleigh), is priced around £66.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Dublin 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

Browse thousands of different options on Cheapflights for your next trip

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Top 3 airlines flying from Dublin to Portsmouth

Discover the top 3 airlines that operate flights from Dublin 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 18 May 2026.
AirlineCheapestAverageFlexibilityOn-time
RyanairCheapest£28Average£74FlexibilityNo cancel feeOn-timeN/A
Search Ryanair flights
British AirwaysCheapest£74Average£145FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Aer LingusCheapest£88Average£150FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights

Fly with Cheapflights

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

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

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