He also attacked an attendant of the Cathay Pacific flight from Bangkok, Thailand, April 19.
He told the court that he was to go to Libya but only discovered he was on his way when the cabin crew announced the flight was about to land.
He then threatened an air stewardess by holding a plastic pen to her neck, but was subdued by other crew members and passengers.
Cantalejo, who was remanded in custody, was charged with behaving in a disorderly manner on board an aircraft in Hong Kong.
