Cheap flights from Dublin to London from £39

The month of December is, on average, the cheapest month to fly to Southampton from Dublin, with most prices found around £116. If you’re not able to fly to Southampton in December, then November is your next best option. Flight prices from Dublin to Southampton during November average around £122.

Our data shows that Tuesday is the least expensive day to fly to Southampton. Tickets to fly out on this day can be as low as £107. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around £251. These prices are subject to change though, so be sure to set up a Price Alert for flights to Southampton.

According to our data, the cheapest time of day to fly to Southampton is in the morning. momondo users have found flights departing from Dublin to Southampton in the morning for as low as £130. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are £155 on average. Flights to Southampton from Dublin in the afternoon are generally more expensive because this time of day is more convenient for travellers’ schedules.

Fly from Dublin to Southampton Eastleigh for the best Dublin - Southampton Eastleigh flight prices

You are more likely to see cheaper flights to Southampton from Dublin when booking weeks ahead of your departure date. In general, you can expect to find flights to Southampton for around £137 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Southampton from Dublin for as low as £113 on momondo.

There is only 1 cabin class available to choose from on Dublin to Southampton flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Aer Lingus is the most popular carrier operating from Dublin to Southampton Eastleigh

Ryanair, British Airways and Aer Lingus are the top three most popular airlines that fly to Southampton from Dublin according to our data. Ryanair is the first choice among our users, with 51% of people opting to fly with this airline when travelling to Southampton. Keep in mind that there are 3 different airlines that fly to Southampton on a routine basis, so you have a few additional options to choose from.

Historically, on average around 16% of flights between Dublin and Southampton have experienced a delay on any given week. The average delay length over the past 12 months has been 107 minutes.

Generally, flights departing in the morning tend to experience fewer delays. Flights departing in the early afternoon have, in the past, seen delays more frequently in comparison.

Tuesday is statistically the day of the week that experiences the fewest delays on this flight route. Thursday has historically seen more delays on average compared to the rest of the week.

According to our data, Aer Lingus have had the fewest delays on this route over the last 12 months, with about 16% of their flights experiencing any sort of delay.

The number of flights available between Dublin and Southampton is 5 per day as of October 2026. The most frequent departure time is 17:00, with 75% of daily flights leaving in the afternoon.

As of October 2026, there are 40 flights per week flying from Dublin to Southampton. The most common day of the week flights depart is Mon, with 18% of flights taking off on this day.