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Cheap flights from Dublin to Portsmouth from £34

DUB — LHR
29 Sep — 6 Oct1
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

Sat 10/1015:10 -
Nonstop1h 40m
Sat 17/1020:00 -
Nonstop1h 35m
Deal found 28/8£76
Mon 12/1007:00 -
Nonstop1h 40m
Mon 19/1017:20 -
Nonstop1h 35m
Deal found 28/8£81
Mon 21/917:50 -
Nonstop1h 40m
Tue 22/920:00 -
Nonstop1h 35m
Deal found 29/8£84
Sat 19/907:00 -
Nonstop1h 40m
Mon 21/917:20 -
Nonstop1h 35m
Deal found 28/8£85
Sat 3/1015:10 -
Nonstop1h 40m
Mon 5/1017:20 -
Nonstop1h 35m
Deal found 28/8£87
Mon 26/1007:10 -
Nonstop1h 40m
Tue 27/1009:20 -
Nonstop1h 40m
Deal found 28/8£89
Mon 12/1007:00 -
Nonstop1h 40m
Sat 17/1017:20 -
Nonstop1h 35m
Deal found 28/8£89
Tue 15/915:10 -
Nonstop1h 40m
Sat 19/920:00 -
Nonstop1h 35m
Deal found 29/8£91
Sun 11/1006:55 -
Nonstop1h 40m
Sun 18/1020:00 -
Nonstop1h 35m
Deal found 27/8£93
Wed 28/1007:00 -
Nonstop1h 40m
Sat 31/1008:20 -
1 stop14h 10m
Deal found 26/8£95

Find flight deals from Dublin to Portsmouth

Round-trip from

£76

One-way from

£34

Popular in

June

Cheapest in

February

Average price

£145
Aer Lingus
  • Aer Lingus
  • 10/10-17/10
  • Nonstop
  • 3h 15m total
  • Dublin to Portsmouth
Search Deals
Aer Lingus
  • Aer Lingus
  • 7/12
  • Nonstop
  • 1h 40m total
  • Dublin to Portsmouth
Search Deals
Highest demand for flights based on searches. 16% potential increase in price (£20 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£3 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 2026
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Cheapflights Fare Finder

 
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 Dublin - SOU Southampton Eastleigh

DUBSOU

Dublin

Sat 10/10

15:10-16:50

Nonstop1h 40m

Southampton Eastleigh

Sat 17/10

20:00-21:35

Nonstop1h 35m

£76

DublinSouthampton

DUB Dublin - SOU Southampton Eastleigh

DUBSOU

Dublin

Mon 12/10

07:00-08:40

Nonstop1h 40m

Southampton Eastleigh

Mon 19/10

17:20-18:55

Nonstop1h 35m

£81

DublinSouthampton

DUB Dublin - SOU Southampton Eastleigh

DUBSOU

Dublin

Wed 14/10

06:25-08:05

Nonstop1h 40m

Southampton Eastleigh

Wed 21/10

10:45-23:35

1 stop12h 50m

£102

DublinSouthampton

DUB Dublin - SOU Southampton Eastleigh

DUBSOU

Dublin

Tue 13/10

06:55-12:50

1 stop5h 55m

Southampton Eastleigh

Thu 15/10

20:00-21:35

Nonstop1h 35m

£106

DublinSouthampton

DUB Dublin - SOU Southampton Eastleigh

DUBSOU

Dublin

Fri 9/10

07:00-08:40

Nonstop1h 40m

Southampton Eastleigh

Fri 16/10

20:00-21:35

Nonstop1h 35m

£113

DublinSouthampton

DUB Dublin - SOU Southampton Eastleigh

DUBSOU

Dublin

Wed 7/10

06:20-10:15

1 stop3h 55m

Southampton Eastleigh

Sat 10/10

07:50-15:00

1 stop7h 10m

£117

DublinSouthampton

DUB Dublin - SOU Southampton Eastleigh

DUBSOU

Dublin

Thu 1/10

21:50-08:45

1 stop10h 55m

Southampton Eastleigh

Sun 4/10

09:20-11:00

Nonstop1h 40m

£130

DublinSouthampton

DUB Dublin - SOU Southampton Eastleigh

DUBSOU

Dublin

Sun 11/10

10:45-12:25

1 stop25h 40m

Southampton Eastleigh

Sun 18/10

09:20-11:00

Nonstop1h 40m

£131

DublinSouthampton

DUB Dublin - SOU Southampton Eastleigh

DUBSOU

Dublin

Fri 9/10

13:25-08:45

1 stop19h 20m

Southampton Eastleigh

Fri 16/10

20:00-21:35

Nonstop1h 35m

£145

DublinSouthampton

DUB Dublin - SOU Southampton Eastleigh

DUBSOU

Dublin

Sat 31/10

13:25-08:55

1 stop19h 30m

Southampton Eastleigh

Sat 7/11

17:20-16:20

1 stop23h 00m

£149

Flights are sorted by cheapest return flights first.

Deals found on 26/8

Showing 1-10 of 21 resultsSorted by cheapest first
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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

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?

It’s optimal to fly from Dublin to Portsmouth in the evening. By choosing this option you can save up to 50% on the cost of your flight, compared to a flight in the afternoon.

Weekly flight availability from Dublin to Portsmouth

The most flights from DUB to P0R are scheduled on a Saturday (72 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (51 on average).

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

Airfare is below average for this route at the moment.
Dublin to Portsmouth flights typically cost between £103 and £176 in October.
The cheapest return price found within the last 5 days was £76 on Aer Lingus (10 Oct–17 Oct).

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

Travellers seeking maximum savings on their Dublin to Portsmouth flight should consider departing on Tuesday 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 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
1,732 reviews
Check prices

Food

6.7

Overall

7.3

Entertainment

7.0

Comfort

7.2

Crew

8.1

Boarding

7.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2026

DUB - BCN

Would have been nice to have a plane that was equipped with a screen to watch a movie enroute to Barcelona, but all good. Flight and crew was excellent. Much appreciated the updates from captain and Kayak about the flight delay due the weather. It’s nice to be kept informed. Will Aer Lingus for future flights, and definitely through Kayak
Aer Lingus
7.3
Good
1,732 reviews
Aer Lingus
7.3
Good
1,732 reviews
Check prices

Food

6.7

Overall

7.3

Entertainment

7.0

Comfort

7.2

Crew

8.1

Boarding

7.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2026

DUB - BCN

Would have been nice to have a plane that was equipped with a screen to watch a movie enroute to Barcelona, but all good. Flight and crew was excellent. Much appreciated the updates from captain and Kayak about the flight delay due the weather. It’s nice to be kept informed. Will Aer Lingus for future flights, and definitely through Kayak

Related info for your journey

  • 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 6 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 (79%), Aer Lingus (72%), British Airways (71%).

  • What are the cheapest flights from Dublin to Portsmouth?

    Looking for the cheapest flight from Dublin to Portsmouth? While on average our users pay £1,464, our data indicates the cheapest price to be £48. The most popular route (Dublin - Southampton Eastleigh), is priced around £76.

  • 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

Top 3 airlines flying from Dublin to Portsmouth

AirlineCheapestAverageFlexibilityOn-time
RyanairCheapest£30Average£75FlexibilityNo cancel feeOn-timeN/A
Search Ryanair flights
British AirwaysCheapest£73Average£142FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Aer LingusCheapest£95Average£144FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights

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