There are cruises from Miami to the Caribbean and the Bahamas in September of 2014. Most of the trips are on Carnival, Norwegian and Royal Caribbean.
The Carnival Ecstasy offers 4-day Western Caribbean cruises that visit Key West (Florida) and Cozumel (Mexico). Departures September 1, 8, and 15.
The new Norwegian Getaway ship makes 7-day Eastern Caribbean cruises. Go to the islands of St Maarten, St Thomas, and the Bahamas. Departures September 6, 13, 20 and 27.
The Royal Caribbean Majesty of the Seas offers 4-night Bahamas cruises. Visit Nassau (Bahamas), CocoCay (Bahamas) and Key West (Florida). Departs September 1, 8, 15, 22, and 29.
See the full calendar of cruises from Miami in September 2014.