Are you looking for 20 day cruises that leave from Miami, FL? As of today - August 18, 2025 - there are just 2 such cruise options. These cruise options are offered by two cruise lines - Cunard (just 1 sailing on Queen Elizabeth) and Holland America (just 1 sailing on Zuiderdam).
In the following table you can see all 20 day cruises that depart from Miami sorted by departure date.