Dublin Airport says there were significant queues in both terminals in the early hours of this morning, in particular between 2.30am and 4.30am.
It says at the peak, it took some passengers 70 minutes to pass through security.
Dublin Airport says it was "mainly the result of a large number of passengers arriving earlier than expected ahead of flights later in the morning".
daa says the shortage of security screening staff is the key contributory factor to the current difficulties.
It invited around 250 candidates for an interview this week, and made job offers to 100 of those.
daa Statement
"There were significant queues in both Terminals at Dublin Airport in the early hours of this morning, particularly between 2.30am and 4.30am. This was mainly the result of a large number of passengers arriving earlier than expected ahead of flights later in the morning. At the peak this morning, it took some passengers up to 70 minutes to pass through security. Queue times reduced considerably once additional security lanes were opened up, as scheduled, in both terminals.
"With Dublin Airport set to get busier over the coming weeks, passengers are being reminded to arrive at the airport a minimum of three and a half hours prior to their departure time.
"The shortage of security screening staff is the key contributory factor to the current difficulties. While there have been no constraints on recruitment – more than 100 new security staff have already been recruited to date this year - daa is re-doubling its efforts to recruit additional staff. This week daa invited around 250 candidates for an interview, with offers now being made to almost 100 of those candidates.
"daa is also exploring other options to increase security staff numbers, including identifying former security screeners still employed by daa but now in different roles in the company and reaching out to those currently on career breaks, to ascertain their interest in reverting to security duties in the short term. The company is temporarily re-assigning a number of Cork-based security staff to Dublin in a manner that will assist the operation at Dublin Airport, without compromising the product offering in Cork. daa is also offering overtime to screening staff to encourage them to take up additional hours to help alleviate the issue."
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