Dublin Airport passengers have been advised to arrive at the airport 2.5 hours before the departure of short-haul flights to Europe and the UK.
In its latest update, the daa recommended that all long-haul passengers arrive up to 3.5 hours before their flight.
However, passengers flying on short-haul flights taking off after 8.30am are advised not to arrive at the airport any earlier than 6am.
The daa said this would alleviate pressure on the passenger security screening area and said passengers should arrive no earlier than 2.5 hours before a short-haul flight.
Passengers have been advised to check with their airline when check-in and bag drop-off opens and to plan their arrival at the airport based on that information. They are also encouraged, where possible, to check-in for their flight online.
Advice has been adjusted following improved queuing times at security screening at Dublin Airport since the end of March, including over the busy Easter weekend.
To minimise queuing times, security screening in Terminal 1 will remain open 24/7, while security in Terminal 2 will open from 4am.
However, the daa said it will continue to keep passenger advice under review and may adjust its recommended timings over the coming period as the peak of the summer season approaches.
It thanked passengers for their co-operation and patience over recent weeks to ensure the stabilisation of security queue times in both terminals at Dublin Airport.
Despite Dublin Airport seeing over 200,000 passenger departures over the Easter weekend - the highest number seen over a consecutive four-day period since Christmas 2019 - the daa noted that no passenger had missed their flight as a result of security delays.
It said most passengers made it through security in under 40 minutes in both terminals, with a small number over this at certain peaks.
The improved timing of security checks has been attributed to the successful deployment of a staff task force in the terminals (which will remain in place over the coming weeks); the continued refinement of security queuing systems, and rostering at peak times to cope with growing demand for air travel; and adherence by passengers to daa's arrival time advice.
Dublin Airport is currently in the process of hiring almost 300 new security screening staff to help it meet the significant increase in demand for international travel.
The daa said good progress is being made in that recruitment process, with more than 250 candidates successfully coming through interviews over the past two weeks.
While successful candidates are trained, Garda vetted and put through compulsory security checks over the coming period - a process which takes around 5-6 weeks - daa is working to ensure that it has the maximum number of security lanes open at all times in both terminals.
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