Cheap flights from Ireland to London from £39

The month of February is, on average, the cheapest month to fly to Southampton from Ireland, with most prices found around £110. If you’re not able to fly to Southampton in February, then March is your next best option. Flight prices from Ireland to Southampton during March average around £116.

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 £105. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around £246. 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 at midday. momondo users have found flights departing from Ireland to Southampton at midday for as low as £128. 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 £153 on average. Flights to Southampton from Ireland 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 Ireland - Southampton Eastleigh flight prices

You are more likely to see cheaper flights to Southampton from Ireland when booking weeks ahead of your departure date. In general, you can expect to find flights to Southampton for around £139 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 Ireland for as low as £107 on momondo.

There is only 1 cabin class available to choose from on Ireland 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, KLM, and British Airways are the most popular carriers operating from Ireland to Southampton Eastleigh

Ryanair, Aer Lingus and British Airways are the top three most popular airlines that fly to Southampton from Ireland according to our data. Ryanair is the first choice among our users, with 49% 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 Ireland and Southampton have experienced a delay on any given week. The average delay length over the past 12 months has been 105 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. Friday 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 Ireland and Southampton is 5 per day as of August 2026. The most frequent departure time is 15:00, with 73% of daily flights leaving in the afternoon.

As of August 2026, there are 36 flights per week flying from Ireland to Southampton. The most common day of the week flights depart is Tue, with 17% of flights taking off on this day.