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Cheap flights from Dublin to Portsmouth from £39

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 16/11. Fares are subject to change and may not be available on all flights or dates of travel.
DUB — LHR
10 Sep — 17 Sep1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Dublin to Portsmouth are usually found in February or March, booked 27 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 11 August 2026.

Sat 12/917:50 -
Nonstop1h 40m
Sat 19/920:00 -
Nonstop1h 35m
Deal found 10/8£96
Tue 18/807:00 -
Nonstop1h 40m
Tue 25/820:00 -
Nonstop1h 35m
Deal found 10/8£96
Sun 23/806:55 -
Nonstop1h 40m
Wed 26/820:00 -
Nonstop1h 35m
Deal found 8/8£99
Tue 1/907:00 -
Nonstop1h 40m
Tue 15/917:20 -
Nonstop1h 35m
Deal found 6/8£99
Wed 9/917:50 -
Nonstop1h 40m
Wed 16/917:20 -
Nonstop1h 35m
Deal found 7/8£100
Thu 27/807:00 -
Nonstop1h 40m
Sun 30/820:00 -
Nonstop1h 35m
Deal found 11/8£101
Thu 3/915:10 -
Nonstop1h 40m
Tue 8/909:15 -
Nonstop1h 40m
Deal found 9/8£102
Sat 7/1107:00 -
Nonstop1h 40m
Sun 15/1109:20 -
Nonstop1h 40m
Deal found 8/8£104
Sat 29/817:50 -
Nonstop1h 40m
Sun 6/909:20 -
Nonstop1h 40m
Deal found 9/8£104
Tue 3/1107:00 -
Nonstop1h 40m
Wed 4/1109:20 -
Nonstop1h 40m
Deal found 8/8£105
Sat 7/1114:45 -
Nonstop1h 50m
Sun 15/1112:50 -
1 stop10h 35m
Deal found 8/8£106

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 11 August 2026.

Round-trip from

£96

One-way from

£39

Popular in

July

Cheapest in

February

Average price

£144
Aer Lingus
  • Aer Lingus
  • 12/9-19/9
  • Nonstop
  • 3h 15m total
  • Dublin to Portsmouth
Search Deals
Aer Lingus
  • Aer Lingus
  • 16/11
  • Nonstop
  • 1h 40m total
  • Dublin to Portsmouth
Search Deals
Highest demand for flights based on searches. 14% potential increase in price (£16 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 August 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 11 August 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 Dublin - SOU Southampton Eastleigh

DUBSOU

Dublin

Mon 7/9

07:00-08:40

Nonstop1h 40m

Southampton Eastleigh

Mon 14/9

20:00-21:35

Nonstop1h 35m

£102

DublinSouthampton

DUB Dublin - SOU Southampton Eastleigh

DUBSOU

Dublin

Thu 24/9

17:50-19:30

Nonstop1h 40m

Southampton Eastleigh

Thu 1/10

11:40-22:40

1 stop11h 00m

£112

DublinSouthampton

DUB Dublin - SOU Southampton Eastleigh

DUBSOU

Dublin

Fri 25/9

08:55-08:45

1 stop23h 50m

Southampton Eastleigh

Fri 2/10

20:00-21:35

Nonstop1h 35m

£143

DublinSouthampton

DUB Dublin - SOU Southampton Eastleigh

DUBSOU

Dublin

Thu 27/8

17:20-08:45

1 stop15h 25m

Southampton Eastleigh

Sun 30/8

09:15-08:20

1 stop23h 05m

£147

DublinSouthampton

DUB Dublin - SOU Southampton Eastleigh

DUBSOU

Dublin

Wed 9/9

11:10-16:50

1 stop5h 40m

Southampton Eastleigh

Wed 16/9

17:20-22:25

1 stop5h 05m

£150

DublinSouthampton

DUB Dublin - SOU Southampton Eastleigh

DUBSOU

Dublin

Thu 10/9

05:55-16:50

1 stop10h 55m

Southampton Eastleigh

Tue 15/9

17:20-22:25

1 stop5h 05m

£150

DublinSouthampton

DUB Dublin - SOU Southampton Eastleigh

DUBSOU

Dublin

Sun 23/8

06:55-08:35

Nonstop1h 40m

Southampton Eastleigh

Thu 27/8

08:55-22:40

2 stops13h 45m

£167

DublinSouthampton

DUB Dublin - SOU Southampton Eastleigh

DUBSOU

Dublin

Sat 19/12

05:45-17:00

1 stop11h 15m

Southampton Eastleigh

Sun 20/12

17:30-22:15

1 stop4h 45m

£194

DublinSouthampton

DUB Dublin - SOU Southampton Eastleigh

DUBSOU

Dublin

Thu 3/9

05:55-16:50

1 stop10h 55m

Southampton Eastleigh

Tue 8/9

09:05-16:40

1 stop7h 35m

£217
Cheapest one-way
Fastest single journey

DublinSouthampton

DUB Dublin - SOU Southampton Eastleigh

DUBSOU

Dublin

Mon 16/11

07:00-08:40

Nonstop1h 40m

£39

Flights are sorted by cheapest return flights first.

Deals found on 8/8

Showing 1-10 of 18 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 11 August 2026.

It’s optimal to fly from Dublin to Portsmouth in the evening. By choosing this option you can save up to 51% on the cost of your flight, compared to a flight in the afternoon.

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 11 August 2026.

The most flights from DUB to P0R are scheduled on a Monday (79 on average). You will have fewer flight options on Saturday, 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?

Airfare is below average for this route at the moment.
Dublin to Portsmouth flights typically cost between £121 and £157 in September.
The cheapest return price found within the last 5 days was £96 on Aer Lingus (12 Sept–19 Sept).

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 8 August 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.

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 11 August 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
1,697 reviews
Check prices

Entertainment

7.0

Overall

7.3

Food

6.7

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
1,697 reviews
Aer Lingus
7.3
Good
1,697 reviews
Check prices

Entertainment

7.0

Overall

7.3

Food

6.7

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

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 3 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 or KLM to get the fastest option. The distance between Dublin and Portsmouth is about 268 mi. This flight may include one or multiple stops.

  • 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 (76%), Aer Lingus (68%), British Airways (67%).

  • What are the cheapest flights from Dublin to Portsmouth?

    Looking for the cheapest flight from Dublin to Portsmouth? While on average our users pay £1,513, our data indicates the cheapest price to be £50. The most popular route (Dublin - Southampton Eastleigh), is priced around £96.

  • 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 11 August 2026.
AirlineCheapestAverageFlexibilityOn-time
RyanairCheapest£29Average£78FlexibilityNo cancel feeOn-timeN/A
Search Ryanair flights
British AirwaysCheapest£73Average£143FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Aer LingusCheapest£95Average£146FlexibilityNo 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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Why should you use Cheapflights to find cheap flight tickets from Dublin to Portsmouth?

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

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

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

Not ready to book yet? You can track prices for flights from Dublin to Portsmouth on Cheapflights with our Price Alert feature and get notified when better prices are available.

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