Carnival Cruise Line offers a rewards program where guests can earn points towards free cruises. Typically, guests accumulate points based on the number of nights spent on board and the type of stateroom booked. For a complimentary cruise, travelers usually need to reach a specific threshold of points, which can vary depending on the cruise length and destination. By participating in onboard activities and dining experiences, guests can maximize their point accumulation, making future vacations more affordable and rewarding. Always check Carnival's official website for the most current point requirements and promotions.