Cheap flights from Ireland to Philadelphia from €251

The cheapest month to fly to Philadelphia from Ireland is in March. Flight prices, which tend to average around €271, are often lower during this time because this is during the off-season. If you don’t want to visit Philadelphia in March, then you should wait until April to fly from Ireland, when ticket prices are also cheap, with an average price of €274.

The cheapest day to depart from Ireland to Philadelphia is on a Friday. Travellers who choose to depart for Philadelphia on a Friday will often find tickets for as low as €582. If your travel schedule is flexible, try to avoid departing on a Monday because tickets tend to average around €788. These prices are subject to change though, so be sure to set up a Price Alert for flights to Philadelphia.

Flying to Philadelphia from Ireland in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as €589 when looking at flights departing in the afternoon. Flights at midday are often more expensive, with an average ticket price of €650.

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 €512 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Philadelphia from Ireland for as low as €420 on momondo.

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

Aer Lingus, United Airlines and KLM 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 travelling to Philadelphia. Keep in mind that there are 14 different airlines that fly to Philadelphia on a routine basis, so you have a few additional options to choose from.

Historically, on average around 11% 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 141 minutes.

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

Saturday is statistically the day of the week that experiences the fewest 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 fewest delays on this route over the last 12 months, with about 9% of their flights experiencing any sort of delay.

10 flights are operational daily from Ireland to Philadelphia as of May 2026. The most popular departure time for this route is 13:00, with 100% of flights per day taking off in the afternoon.

The number of flights available between Ireland and Philadelphia is 70 per week as of May 2026. The most frequent departure day is Mon, with 14% of weekly flights leaving on this day.