Cheap flights from the United Kingdom to Ireland from €18

The month of October is another great option to travel to Ireland, with average flight prices from United Kingdom averaging around €71.

The cheapest day to depart on your flight to Ireland is on a Saturday when prices can be found for as low as €111. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Thursday because tickets tend to average around €260. These prices are subject to change though, so be sure to set up a Price Alert for flights to Ireland.

At midday is the cheapest time of day to fly from United Kingdom to Ireland when you can find flight prices for as low as €106. Flying to Ireland at midday is an ideal time because this is during off-peak travel hours. In contrast, the most expensive time of day to depart to Ireland is in the afternoon when prices are around €191.

Fly from London Luton to Knock Intl for the best United Kingdom - Ireland flight prices

You are more likely to see cheaper flights to Ireland from United Kingdom when booking weeks ahead of your departure date. In general, you can expect to find flights to Ireland for around €150 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ireland from United Kingdom for as low as €110 on momondo.

Ryanair, Aer Lingus, and British Airways are the most popular carriers operating from United Kingdom to Ireland

British Airways, Ryanair and Aer Lingus are the top three most popular airlines that fly to Ireland from United Kingdom according to our data. British Airways is the first choice among our users, with 48% of people opting to fly with this airline when travelling to Ireland. Keep in mind that there are 3 different airlines that fly to Ireland on a routine basis, so you have a few additional options to choose from.

Historically, on average around 20% of flights between United Kingdom and Ireland have experienced a delay on any given week. The average delay length over the past 12 months has been 100 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, British Airways have had the fewest delays on this route over the last 12 months, with about 14% of their flights experiencing any sort of delay.

As of May 2026, 135 flights take off from United Kingdom and land in Ireland each day. The most common flight departure time for this route is 09:00, with 40% of daily flights taking off at midday.

The number of flights available between United Kingdom and Ireland is 949 per week as of May 2026. The most frequent departure day is Thu, with 21% of weekly flights leaving on this day.