Yes, you can book a Carnival cruise for a single person, but it is important to understand the financial implications of the "Single Supplement." Most cruise staterooms are designed and priced based on double occupancy. When you book a room for just one person, Carnival (like most major lines) typically charges a supplement that can be up to 200% of the per-person fare, effectively meaning you pay for two people even though only one is traveling. This covers the "lost revenue" from the second passenger's onboard spending. However, in 2026, Carnival occasionally offers "Single Traveler" promotions where this supplement is reduced or waived on specific sailings. Furthermore, some of their newer or refurbished ships may feature a limited number of dedicated "Solo Staterooms" which are priced specifically for one. If you book a standard room alone, you will still receive the full amount of VIFP points for the days sailed, but you will only be charged the port fees and taxes for a single individual.