To get upgraded on Carnival, keep an eye on your Carnival Cruise Upgrade Policy by logging into your Cruise Manager. Carnival often sends upgrade offers before your sailing—especially 60–90 days out. You can also request a Carnival Cruise Room Upgrade by calling Guest Services or your travel agent. Booking a guarantee cabin, joining the VIFP loyalty program, or watching for fare drops... https://www.cruisesfares.com/blogs/how-to-get-upgraded-on-carnival-cruise