Cruises.com via ShermansCruise offers a Carnival Cruise 5-Night Bahamas Cruise for Two with prices starting at $588. (On the ShermansCruise landing page, scroll down and click "Book Now" next to the September 24 sailing date.) That's the lowest price we could find by $20. This roundtrip cruise aboard the Carnival Elation departs from Jacksonville, FL, on September 24. Book this travel deal by May 31.