Cheap flights from Philadelphia to Ireland from $148

In general, January is the cheapest month to fly from Philadelphia to Ireland. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $134. If you aren’t able to travel to Ireland during the month of January, then flying in October is also cheap. Prices for this month can be found on momondo for an average of $271.

The cheapest day to depart on your flight to Ireland is on a Monday when prices can be found for as low as $714. This is often the case because there is less demand to fly during this day of the week. Flights from Philadelphia to Ireland on a Saturday will generally be more expensive and average around $846. 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 afternoon. momondo users have found flights departing from Philadelphia to Ireland in the afternoon for as low as $760. 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 evening when prices are around $773.

Fly from Philadelphia to Dublin for the best Philadelphia - Ireland flight prices

You are more likely to see cheaper flights to Ireland from Philadelphia when booking weeks ahead of your departure date. In general, you can expect to find flights to Ireland for around $694 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ireland from Philadelphia for as low as $635 on momondo.

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

British Airways and United Airlines are the most popular carriers operating from Philadelphia to Ireland

Aer Lingus, United Airlines and American Airlines are the top three most popular airlines that fly to Ireland from Philadelphia according to our data. Aer Lingus is the first choice among our users, with 51% 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.

As of July 2026, there are 10 flights per day flying from Philadelphia to Ireland. The most common time of day flights depart is 8:00PM, with 100% of flights taking off in the evening.

As of July 2026, there are 70 flights per week flying from Philadelphia to Ireland. The most common day of the week flights depart is Mon, with 14% of flights taking off on this day.