Cheap flights from Ireland to the United States from €231

The cheapest month to fly to United States from Ireland is in September. Flight prices, which tend to average around €398, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of September, then book flights to United States from Ireland during February instead. Flights to United States in February, while not as cheap as those in September, still average around €404.

According to our data, Thursday is the cheapest day to fly to United States from Ireland. The lowest ticket price found for a Thursday departure recently was €545. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Ireland to United States for around €643.

Our data shows that the cheapest Ireland to United States flights are usually those with departure times in the evening. Our users have found flights to United States in the evening for as low as €430. Flights in the morning are often more expensive, with an average ticket price of €601.

Fly from Dublin to Las Vegas Harry Reid Intl for the best Ireland - United States flight prices

You are more likely to see cheaper flights to United States from Ireland when booking weeks ahead of your departure date. In general, you can expect to find flights to United States for around €501 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to United States from Ireland for as low as €431 on momondo.

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

WestJet and Aer Lingus are the most popular carriers operating from Ireland to United States

Aer Lingus, United Airlines and American Airlines are the top three most popular airlines that fly to United States from Ireland according to our data. Aer Lingus is the first choice among our users, with 66% of people opting to fly with this airline when travelling to United States. Keep in mind that there are 16 different airlines that fly to United States on a routine basis, so you have a few additional options to choose from.

Historically, on average around 12% of flights between Ireland and United States have experienced a delay on any given week. The average delay length over the past 12 months has been 145 minutes.

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

Wednesday 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 10% of their flights experiencing any sort of delay.

As of March 2026, there are 59 flights per day flying from Ireland to United States. The most common time of day flights depart is 11:00, with 62% of flights taking off in the afternoon.

As of March 2026, 413 flights take off from Ireland and land in United States each week. The most common flight departure day for this route is Mon, with 15% of weekly flights taking off on this day.