I ahve flown to Ireland with my kids a couple of times a year since they were 10 weeks old. I ahve flown to Belfast and Derry. They don't need a pasport. They DO need photo ID. The only form of ID available to kids is a passport. Bugs me cos the passport costs twice the prie of the flights. By the way, it is early to book for crimbo. I neve book til a couple of weeks before