Air France flight AF-5120, operated by CityJet, left Dublin at 9.15am destined for London City Airport. There were 59 passengers and crew on board.
Soon after departure, the crew contacted air traffic controllers and reported that they had suffered a hydraulics failure.
The pilot requested time to assess the issue before deciding whether the jet would have to return to the airport.
Airport crash crews were placed on standby while the flight crew carried out their checklists.
When the CityJet crew confirmed that they wished to return to Dublin, up to six inbound flights were placed in designated holding patterns over the Irish Sea for a time.
Departing aircraft were allowed to take off until it was confirmed that the emergency aircraft was returning to the airport where arrangements were being made to change operations to Dublin’s alternative cross runway.
The Avro RJ-85 jet flew a series of circuits north of Dublin as the crew made preparations to return to Dublin and asked controllers if any evidence of hydraulic fluid was found on the runway. The crew requested that emergency services be on standby for their arrival.
After it had been confirmed that there was no sign of hydraulic fluid or debris on the runway, the flight landed safely shortly after 9.05am.