Dublin Airport again paused flights for around an hour at 7pm on February 6 after drones were seen operating close to the facility.
Flights were diverted to nearby Belfast and to Shannon in Ireland's south-west, with one sent across the Irish Sea to Manchester.
"The reckless and irresponsible behaviour of those causing ongoing drone disruptions is unacceptable," the airport said in a statement.
"Those found responsible will face prosecution." it warned.
The outage was the third in four days after weekend interruptions saw eight Ryanair flights affected and other flights, from Amsterdam, Bucharest and Manchester, forced to land in Belfast.
The drone sightings came over Ireland's first long holiday weekend of 2023, when around 300,000 people were expected to fly from and into the airport.
Ryanar responded to the Monday disruption by posting a series of tweets criticising Ireland's transport minister, Eamon Ryan, including a photo of the minister falling asleep during a session of parliament in Dublin in 2020.