Cheap flights from Ireland to Philadelphia from £343

If you aren’t able to travel during the month of March, then book flights to Philadelphia from Ireland during April instead. Flights to Philadelphia in April, while not as cheap as those in March, still average around £398.

Our data shows that Sunday is the least expensive day to fly to Philadelphia. Tickets to fly out on this day can be as low as £441. On the other hand, Friday is the most expensive day to depart from Ireland because it is more convenient for both business and leisure travellers. As a result, prices tend to be around £556.

The cheapest time of day to fly to Philadelphia is in the morning when flights can be purchased for as low as £494. In the afternoon is when there is more demand to fly to Philadelphia, so prices are often more expensive at around £635 per ticket.

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 £469 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 £368 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.

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

Aer Lingus, Finnair and Iberia 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 71% of people opting to fly with this airline when travelling to Philadelphia. Keep in mind that there are 13 different airlines that fly to Philadelphia on a routine basis, so you have a few additional options to choose from.

Historically, on average around 14% 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 138 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.

Tuesday 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 12% of their flights experiencing any sort of delay.

The number of flights available between Ireland and Philadelphia is 10 per day as of September 2026. The most frequent departure time is 16:00, with 100% of daily flights leaving in the afternoon.

As of September 2026, 70 flights take off from Ireland and land in Philadelphia each week. The most common flight departure day for this route is Mon, with 14% of weekly flights taking off on this day.