Cabin crew at Ryanair could be set to follow the lead of pilots and engage in industrial action.
Staff from across Europe have sent bosses a charter of demands for better pay and working conditions.
Ryanair has called them "pointless" and said staff earn more than double the living wage and have a bank holiday weekend every weekend.
Eoin Coates from the International Transport Workers' Federation used to work for Ryanair.
He says crew are under a lot of pressure to make sales during flights.