In general, when booking your flight to Dublin, March is the cheapest month on average.
From most locations, booking your flights to Dublin around 28 days prior to your departure date finds the best deals.
On average, the cheapest flights to Dublin are found when departing on a Tuesday. Try to avoid departing on a Saturday, as this is usually the most expensive day.
Typically, cheap prices to Dublin are most often found for midday flights. Cheap prices are less likely for morning flights.