Cheap flights from Ireland to London from €45

The cheapest month to fly to Southampton from Ireland is in February. Flight prices, which tend to average around €127, are often lower during this time because this is during the off-season. If you don’t want to visit Southampton in February, then you should wait until March to fly from Ireland, when ticket prices are also cheap, with an average price of €134.

On average, the least expensive day to fly to Southampton from Ireland is on a Monday. momondo users have found tickets for Monday departures for as low as €123. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Saturday as prices are generally higher than usual. According to our data, the average ticket price to Southampton on Saturday is €182.

Our data shows that the cheapest Ireland to Southampton flights are usually those with departure times in the morning. Our users have found flights to Southampton in the morning for as low as €145. Try not to purchase tickets at midday because they tend to be around €165. Of course, these prices can vary depending on the time of year and what airport you fly to.

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 €158 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 €123 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 and KLM are the most popular carriers operating from Ireland to Southampton Eastleigh

Ryanair, British Airways and Aer Lingus 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 42% 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 17% 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 104 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.

As of August 2026, 6 flights take off from Ireland and land in Southampton each day. The most common flight departure time for this route is 17:00, with 77% of daily flights taking off in the afternoon.

The number of flights available between Ireland and Southampton is 47 per week as of August 2026. The most frequent departure day is Mon, with 15% of weekly flights leaving on this day.