Cruise fares are per person which includes infants and children. When children are traveling with 2 full fare guests in the same stateroom they will typically pay a discounted cruise fare. Some cruise lines like MSC and Costa allow children under 11 to sail free on select sail dates, just paying taxes and fees. Please check with one of our travel advisers on your specific dates.
Royal Caribbean and Norwegian Cruise Lines offer limited-time Kids Sail Free promotions throughout the year so make sure to sign up for our newsletters and we will let you know when they come out!