Kids Sail Free is a promotion Royal Caribbean offers from time to time on select sailings that are usually a great vacation discount. Throughout the year, Royal Caribbean will offer Kids Sail Free deals as a way to encourage new bookings. In this post, we will cover information about the promotion, tips for booking it, and offer answers to frequently asked questions. For starters, Kids Sail Free is an offer Royal Caribbean offers selectively throughout the year. It is not available all the time and there is no way to know exactly when it will be offered again. We always post new cruise promotions on this site, so be sure to follow us on Twitter and Facebook for notifications when a new Kids Sail Free promotion begins. The exact offer details may vary, but Royal Caribbean’s Kids Sail Free offers are usually consistent in their basics. Third guests and higher who are 12 years old or younger on select 4 nights or longer sailings are eligible for free cruise fare. There are usually many blackout dates associated with any Kids Sail Free offer, which means if your cruise begins on or in any of the blackout dates, the Kids Sail Free offer does not qualify. Not surprisingly, most of the black out dates are over major school holidays in the United States calendar year.