Are you looking for 15 day cruises that leave from New York, NY? As of today - April 2, 2025 - there are just 3 such cruise options. These cruise options are offered by two cruise lines - Cunard (just 2 sailings, both of them on Queen Mary 2) and Norwegian (NCL) (just 1 sailing on Norwegian Gem).
In the following table you can see all 15 day cruises that depart from New York sorted by departure date.