Wondering how to upgrade your Carnival cruise room after booking? You may be able to move to a higher stateroom category, such as an ocean-view room, balcony cabin, or suite, depending on availability. Carnival Cruise Line offers upgrade opportunities before departure, but prices and options vary by sailing. Review your reservation details and compare the available cabins before making a decision. For help exploring Carnival cruise room upgrade options, call +1-888-653-0010.