Cheap flights from Ireland to Philadelphia from $325

The cheapest month to fly to Philadelphia from Ireland is in March. Flight prices, which tend to average around $461, are often lower during this time because this is during the off-season. The month of April is another great option to travel to Philadelphia, with average flight prices from Ireland averaging around $491.

The cheapest day to depart from Ireland to Philadelphia is on a Thursday. Travelers who choose to depart for Philadelphia on a Thursday will often find tickets for as low as $616. On the other hand, Sunday is the most expensive day to depart from Ireland because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $812.

According to our data, the cheapest time of day to fly to Philadelphia is at noon. momondo users have found flights departing from Ireland to Philadelphia at noon for as low as $618. 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 Philadelphia is in the afternoon when prices are around $702.

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

You are more likely to see cheaper flights to Philadelphia from Ireland when booking weeks ahead of your departure date. In general, you can expect to find flights to Philadelphia for around $591 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Philadelphia from Ireland for as low as $492 on momondo.

There are 3 cabin classes available to choose from on Ireland to Philadelphia flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

JetBlue, Icelandair, and British Airways are the most popular carriers operating from Ireland to Philadelphia

Aer Lingus, Delta and United Airlines are the top three most popular airlines that fly to Philadelphia from Ireland according to our data. Aer Lingus is the first choice among our users, with 69% of people opting to fly with this airline when traveling to Philadelphia. Keep in mind that there are 8 different airlines that fly to Philadelphia on a routine basis, so you have a few additional options to choose from.

Historically, on average around 9% of flights between Ireland and Philadelphia have experienced a delay on any given week. The average delay length over the past 12 months has been 133 minutes.

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

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

According to our data, American Airlines have had the least number of delays on this route over the last 12 months; with about 7% of their flights experiencing any sort of delay.

The number of flights available between Ireland and Philadelphia is 8 per day as of March 2026. The most frequent departure time is 11:00AM, with 50% of daily flights leaving at noon.

As of March 2026, there are 60 flights per week flying from Ireland to Philadelphia. The most common day of the week flights depart is Mon, with 17% of flights taking off on this day.