The cost of a Carnival cruise name change depends on your fare conditions, passenger replacement request, and any airfare included in your reservation. Carnival states that eligible bookings without Carnival-booked airfare and without restricted or non-refundable fares can generally have a name change without a fee. However, some promotional bookings have restrictions or may require cancellation penalties and an additional deposit for the replacement guest. Fly2Fun airfare bookings also have separate conditions and possible charges. Check your individual reservation before making changes. For help understanding Carnival name change fees, contact +1-888-653-0010.