how old does  a baby have to be to go on a cruise
Tip: For most cruises, babies must be at least 6 months old by the sail date. 1. Costa does not charge cruise fares for children under 3, but remember that if a child is traveling with only one adult, the adult pays the single supplement rate plus taxes and fees for the baby. Bonus: Costa has playrooms with activities for kids of all ages, although an adult must be present if the child is under 3.