The cheapest day to depart from Ireland to Barcelona is on a Tuesday. Travellers who choose to depart for Barcelona on a Tuesday will often find tickets for as low as 122€. The most expensive day to fly to Barcelona is Saturday, with ticket prices averaging around 166€.
In the afternoon is the cheapest time of day to fly from Ireland to Barcelona when you can find flight prices for as low as 132€. Flying to Barcelona in the afternoon is an ideal time because this is during off-peak travel hours. In contrast, the most expensive time of day to depart to Barcelona is at midday when prices are around 251€.