Cheap flights from Ireland to the United States from $256

In general, September is the cheapest month to fly from Ireland to United States. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $460. 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 $463.

According to our data, Wednesday is the cheapest day to fly to United States from Ireland. The lowest ticket price found for a Wednesday departure recently was $601. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $739. These prices are subject to change though, so be sure to set up a Price Alert for flights to United States.

The cheapest time of day to fly to United States is in the evening when flights can be purchased for as low as $483. Try not to purchase tickets in the morning because they tend to be around $681. Of course, these prices can vary depending on the time of year and what airport you fly to.

Fly from Dublin to Boston Logan 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 $578 when searching weeks out. 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 $506 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 LEVEL are the most popular carriers operating from Ireland to United States

Aer Lingus, Delta 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 65% of people opting to fly with this airline when traveling to United States. Keep in mind that there are 13 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 in the evening have, in the past, seen delays more frequently in comparison.

Wednesday is statistically the day of the week which experiences the fewest number of delays on this flight route. Friday has historically seen more delays on average compared to the rest of the week.

According to our data, JetBlue have had the least number of delays on this route over the last 12 months; with about 9% of their flights experiencing any sort of delay.

As of February 2026, 42 flights take off from Ireland and land in United States each day. The most common flight departure time for this route is 4:00PM, with 61% of daily flights taking off in the afternoon.

296 flights are operational weekly from Ireland to United States as of February 2026. The most popular departure day for this route is Sat, with 16% of flights per week taking off on this day.