Question 1

What are the cheapest airlines to fly from Dublin to Portsmouth one-way?

Accepted Answer

One-way options have recently been found by users for as low as £37 on Aer Lingus. Other airlines that offer cheap prices include KLM from £91 and British Airways from £105 one-way.

Question 2

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

Accepted Answer

Booking 47 days in advance of your planned departure date is, on average, the best time to get cheap flights from Dublin to Portsmouth. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

Question 3

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

Accepted Answer

Currently, January is the cheapest month in which you can book a flight from Dublin to Portsmouth (average of £112). Flying from Dublin to Portsmouth in August is currently the most expensive (average of £164). 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.

Question 4

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

Accepted Answer

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

Question 5

Weekly flight availability from Dublin to Portsmouth

Accepted Answer

The most flights from DUB to P0R are scheduled on a Monday (78 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (44 on average).

Question 6

E

Accepted Answer

In terms of precipitation, rainfall in Portsmouth ranges from 25.0 - 76.0 inches per month. December is typically the wettest month, when rainfall can reach 76.0 mm. July is typically the driest time to visit Portsmouth when rainfall is around 25.0 mm.

Question 7

E

Accepted Answer

If weather is an important factor for your trip to Portsmouth, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 18.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 4.0 C).

Question 8

What are the cheapest flights from Dublin to Portsmouth?

Accepted Answer

Looking for the cheapest flight from Dublin to Portsmouth? While on average our users pay £1,242, our data indicates the cheapest price to be £53. The most popular route (Dublin - Southampton Eastleigh), is priced around £97.

Question 9

What are the most reliable airlines from Dublin to Portsmouth?

Accepted Answer

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 (81%), British Airways (79%), Aer Lingus (78%).

Question 10

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

Accepted Answer

Find a great deal and save up to 235% by booking at least 57 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from Dublin to Portsmouth within the next two weeks, with the cheapest ticket starting at £91.

Question 11

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

Accepted Answer

The best pricing can be found in the month of January. Prices to Portsmouth from Dublin average £80. You can even find prices in January for less than £80, as users have found deals to Portsmouth from as low as £24. The month of June appears to be one of the more expensive times to travel to Portsmouth from Dublin. Flying in the targeted month can save you up to 26%.

Question 12

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

Accepted Answer

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Dublin to Portsmouth as you normally would.

Question 13

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

Accepted Answer

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.

Question 14

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

Accepted Answer

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

Question 15

How can I find direct flights from Dublin to Portsmouth?

Accepted Answer

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

Question 16

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

Accepted Answer

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.

Question 17

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

Accepted Answer

Cheapflights makes it easy to find Dublin 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.

Question 18

Why should you use Cheapflights to find cheap flight tickets from Dublin to Portsmouth?

Accepted Answer

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Dublin to Portsmouth for you. Better yet — we are completely free to use.

Question 19

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

Accepted Answer

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

Question 20

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

Accepted Answer

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.

Round-trip from	£73
One-way from	£37
Popular in	June
Cheapest in	December
Average price	£151

Airline	Cheapest	Average	Flexibility	On-time
Ryanair	Cheapest£27	Average£64	FlexibilityNo cancel fee	On-timeN/A	Search Ryanair flights
British Airways	Cheapest£56	Average£122	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Aer Lingus	Cheapest£64	Average£139	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights

Cheap flights from Dublin to Portsmouth from £37

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 27/8. Fares are subject to change and may not be available on all flights or dates of travel.

Cheapflights Tip: The best prices from Dublin to Portsmouth are usually found in December or January, booked 47 days in advance, depart on a Tuesday or Thursday and return on a Monday

Cheap flight deals from Dublin to Portsmouth

Keep the following information in mind while searching for Dublin to Portsmouth flight deals. Data was last updated 3 July 2025.

Round-trip from

One-way from

Popular in

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Find flight deals from Dublin to Portsmouth

Cheapest flights from Dublin to PortsmouthExplore 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 3 July 2025.

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 3 July 2025.

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Use the filters below to find and compare flights from Dublin to Portsmouth that are best for you.

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.

Cheapflights Insights

Everything you need to know about your flight from Dublin to Portsmouth

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

Use this chart to determine the optimal time to book a return flight from Dublin to Portsmouth. Price data was last updated on 27 June 2025.

What is the cheapest month to book a 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 3 July 2025.

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 December 2024.

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 3 July 2025.

Reviews of airlines servicing Portsmouth

Get a feel of what it's like to fly with KLM, Aer Lingus, andBritish Airways 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.

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?

What are the cheapest airlines to fly from Dublin to Portsmouth one-way?

What are the most reliable airlines from Dublin to Portsmouth?

What are the cheapest flights from Dublin to Portsmouth?

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

How can I find direct flights from Dublin to Portsmouth?

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

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

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Dublin to Portsmouth

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Top 3 airlines flying from Dublin to Portsmouth

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

Why should you use Cheapflights to find cheap flight tickets from Dublin to Portsmouth?

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

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

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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 3 July 2025.