Cheap flights from the United Kingdom to Ireland from £17

The month of September is, on average, the cheapest month to fly to Ireland from United Kingdom, with most prices found around £58. If you’re not able to fly to Ireland in September, then January is your next best option. Flight prices from United Kingdom to Ireland during January average around £59.

The cheapest day to depart on your flight to Ireland is on a Friday when prices can be found for as low as £314. This is often the case because there is less demand to fly during this day of the week. Flights from United Kingdom to Ireland on a Monday will generally be more expensive and average around £525. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

In the afternoon is the cheapest time of day to fly from United Kingdom to Ireland when you can find flight prices for as low as £150. Flying to Ireland in the afternoon is an ideal time because this is during off-peak travel hours. Flights to Ireland are more costly in the morning, with an average ticket price of £491. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

Fly from Birmingham 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 £131 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 £94 on momondo.

There are 4 cabin classes available to choose from on United Kingdom to Ireland flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

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

Ryanair, Aer Lingus and British Airways are the top three most popular airlines that fly to Ireland from United Kingdom according to our data. Ryanair is the first choice among our users, with 81% of people opting to fly with this airline when travelling to Ireland. Keep in mind that there are 5 different airlines that fly to Ireland on a routine basis, so you have a few additional options to choose from.

Historically, on average around 21% 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 15% of their flights experiencing any sort of delay.

106 flights are operational daily from United Kingdom to Ireland as of August 2026. The most popular departure time for this route is 09:00, with 39% of flights per day taking off at midday.

As of August 2026, 742 flights take off from United Kingdom and land in Ireland each week. The most common flight departure day for this route is Fri, with 23% of weekly flights taking off on this day.