Travellers scheduled to fly home to Ireland from the UK for Christmas could be in trouble as 1,500 baggage handlers, check-in staff and cargo crew working at 18 airports across the UK are set to strike over the Christmas weekend.
Workers with services firm Swissport have voted to walk out next Friday and Saturday in a dispute over pay.
It could cause havoc for people traveling home for the festive season.
It is unclear exactly how many airports will be affected, but airlines at Edinburgh, Aberdeen, Glasgow, Leeds/Bradford, Liverpool, Newcastle, Heathrow, Stansted and Manchester airports all employ Swissport staff.
Ryanair uses Swissport in the UK. "All of our flights to and from the UK are scheduled to operate as normal," a spokesman for the airline told the BBC.
"Should this action proceed, our flights may operate with hand luggage only and we will update customers accordingly."
Talks are continuing over the weekend to try to avert the strike and reach a deal with Swissport staff.