Flights at Dublin Airport have resumed after a drone was seen over the airfield.
Over 100,000 passengers were affected.
The drone attack that brought Gatwick to a standstill before Christmas is believed to have been an "inside job", according to Whitehall sources.
Several passengers took to Twitter asking how their journey would be affected, however, Dublin airport confirmed just a short while later that all flights had since resumed.
In a statement, the airport said that a pilot had reported a drone sighting to air traffic control at around 11.30am.
It tweeted that the safety and security of customers was its priority.
On Thursday morning, Dublin Airport announced that all flights would be suspended for safety reasons due to the confirmed sighting of a drone over the airfield.
It said three incoming flights were diverted to other airports during the closure, and some knock-on delays to departures were expected for the rest of the day.
Dublin Airport has re-opened after a drone was spotted near the runway.
No one has been arrested over the incident, which saw the airport shut for parts of three days.
After Thursday's incident, Ireland's main opposition party Fianna Fail called for more government action.
"Minister Ross's previous comments that the likelihood of a drone attack in Ireland was "low" clearly shows his lack of understanding of the seriousness of the issue".
In January, Transport Minister Shane Ross called a special meeting of the National Civil Aviation Threat and Risk Group to advise him on the recent incidents in the United Kingdom and their implication for Irish airports.
"Having our air space compromised by the threat of drones is not something they can continue to ignore".