A best bet is the Royal Caribbean 3-Night Caribbean Cruise for Two for $268. (Sort by price to see this deal.) This cruise departs from Colon, Panama, on April 26 and includes one stop in Fort Lauderdale, FL. That's the lowest current rate we could find for this cruise by $180.
Of note, Expedia Cruise Ship Centers offers other 2014 Disney cruises with prices starting at $450 per person. Scroll down to see them all.
A best bet is the Royal Caribbean 3-Night Bahamas Cruise for Two for $438. (It's the top offer on the page.) That's lowest current rate we could find for this cruise by $180.