527,000 passengers are expected through Dublin Airport over the August bank holiday. Over half a million passengers are due to travel through Dublin Airport across the August bank holiday weekend, according to operator daa. Dublin Airport advised passengers to arrive two hours before short-haul flights and three hours before long-haul departures. The August bank holiday weekend is always one of the busiest of the year, with daa teams across the airport ready to ensure passengers enjoy a smooth and efficient journey. Busiest day of each year at Dublin airport