Cheap flights from Boston to Ireland from $289

In general, January is the cheapest month to fly from Boston to Ireland. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $311. If you aren’t able to travel to Ireland during the month of January, then flying in March is also cheap. Prices for this month can be found on momondo for an average of $433.

The cheapest day to depart on your flight to Ireland is on a Tuesday when prices can be found for as low as $602. This is often the case because there is less demand to fly during this day of the week. Flights from Boston to Ireland on a Friday will generally be more expensive and average around $666. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

According to our data, the cheapest time of day to fly to Ireland is in the evening. momondo users have found flights departing from Boston to Ireland in the evening for as low as $602. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In contrast, the most expensive time of day to depart to Ireland is in the afternoon when prices are around $653.

Fly from Boston Logan Intl to Dublin for the best Boston Logan Intl - Ireland flight prices

You are more likely to see cheaper flights to Ireland from Boston when booking weeks ahead of your departure date. In general, you can expect to find flights to Ireland for around $525 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ireland from Boston for as low as $493 on momondo.

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

United Airlines, Delta, and KLM are the most popular carriers operating from Boston Logan Intl to Ireland

Aer Lingus, JetBlue and Delta are the top three most popular airlines that fly to Ireland from Boston 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 Ireland. Keep in mind that there are 14 different airlines that fly to Ireland on a routine basis, so you have a few additional options to choose from.

Historically, on average around 8% of flights between Boston and Ireland have experienced a delay on any given week. The average delay length over the past 12 months has been 141 minutes.

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

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

According to our data, Aer Lingus have had the least number of delays on this route over the last 12 months; with about 5% of their flights experiencing any sort of delay.

The number of flights available between Boston and Ireland is 22 per day as of July 2026. The most frequent departure time is 5:00PM, with 71% of daily flights leaving in the evening.

As of July 2026, there are 159 flights per week flying from Boston to Ireland. The most common day of the week flights depart is Mon, with 14% of flights taking off on this day.