A number of flights to and from Dublin Airport have been affected, with Aer Lingus apologising for the inconvenience caused to passengers.
In a statement, the airline said: "We are experiencing operational issues today, which is impacting our flight schedule.
"We are working hard to resolve these issues as quickly as possible, and we apologise for the inconvenience caused to our passengers.
"Affected customers will be contacted directly by Aer Lingus and will be offered a full refund or the option to rebook their flight."
Aer Lingus has advised passengers to check the airline's website for the latest information on their flight.
Aer Lingus said it is working to resolve the operational issues as quickly as possible.The airline has advised passengers to check the airline's website for the latest information on their flight.