Are you looking for 12 day cruises that leave from Miami, FL? As of today - September 17, 2025 - there are 24 such cruise options. These cruise options are offered by three cruise lines - Cunard (total of 13 sailings, all of them on Queen Elizabeth), Norwegian (NCL) (total of 10 sailings, among them 7 on Norwegian Sun and 2 on Norwegian Jewel) and Seabourn (just 1 sailing on Seabourn Quest).
In the following table you can see all 12 day cruises that depart from Miami sorted by departure date.