You can cancel a Carnival Cruise without penalty if done early enough, based on the Carnival cruise cancellation policy. To avoid fees, cancel well before the final payment date. For details on how to cancel Carnival Cruise, log into your account to cancel Carnival Cruise online or contact customer service directly. https://pub8.bravenet.com/forum/static/show.php?usernum=633183105&frmid=291&cmd=show