The Eastern Caribbean Cruise has 4 ports (Sint-Maarten, St.-Thomas/St.-John, San Juan and Castaway Cay) and are on board the Disney Fantasy since 2012 (before Disney Magic).
There are 3 possible itineraries:
Saturday: Port Canaveral
Sunday: Sea
Monday: Sea
Tuesday: Sint Maarten
Wednesday: St Thomas/St John
Thursday: Sea
Friday: Castaway Cay
Saturday: Port Canaveral
Saturday: Port Canaveral
Sunday: Sea
Monday: Sea
Tuesday: St Thomas/St John
Wednesday: San Juan, Puerto Rico
Thursday: Sea
Friday: Castaway Cay
Saturday: Port Canaveral
Saturday: Port Canaveral
Sunday: Sea
Monday: Sea
Tuesday: Sint Maarten
Wednesday: San Juan, Puerto Rico
Thursday: Sea
Friday: Castaway Cay
Saturday: Port Canaveral