Dublin Airport has said wait times at security have significantly improved in recent weeks, and that people travelling over the summer months will see a real difference due to the recruitment of additional staff.
It said queuing times have now been reduced to 10-20 minutes at quiet times, while the majority of passengers are now clearing security in under 45 minutes.
Since mid-March passengers at Dublin Airport had been experiencing long delays getting through security, particularly at peak times.
Lengthy queues had been reported as the volume of people travelling increased following the reduction of Covid-19 restrictions.
The daa said this was due to delays in garda vetting of new staff because of an EU requirement for extra background checks that came into effect at the start of the year.
Garda Commissioner Drew Harris said enhanced vetting processes for airport staff are "quick and working well".
Mr Harris also said that enough staff had initially been allocated to deal with the additional vetting that came into effect as part of an EU requirement at the start of the year, and that more have since been allocated to the task.
He said the daa, which manages Dublin Airport, is pleased with the garda response to the issue, and that the system is now working well.
Images and accounts posted on social media showed people waiting for up to two hours to clear security in the run up to the St Patrick's Day and Easter holidays, with some people missing flights as a result of the delays.
The daa said more than half of the 300 security staff they had hoped to hire before the summer have now started work or been give a start date
It said this recruitment, as well as the work of a specific taskforce to tackle the issue, queues for security have now dropped to between ten and 45 minutes.
Graeme McQueen, Media Relations Manager daa, said: "We've seen a big improvement in queuing times through April.
"At the moment the airport is busy but people are getting through in 10-20 minutes which is the way we'd like it to be however I would caveat that by saying at busy times its still taking a bit longer.
"In the last two weeks in April we got 98% of passengers through in less than 45 minutes so really good progress but we are still telling passengers to leave 2.5 hours for short haul flights and 3.5 hours for long haul and they'll make their flights in plenty of time."
The daa is also advising passengers not to arrive too early for their flights and that those who are travelling after 8.30am should not turn up in the airport before 6am.