Cruise.com via ShermansCruise offers a Carnival Cruise 4-Night Western Caribbean Cruise for Two with prices starting at $438. (Scroll to the bottom of the landing page and click "Book Now" next to the November 13 sailing date.) That's the lowest price we could find by $20. This roundtrip cruise aboard the Carnival Victory departs from Miami, FL, on October 23. Book this travel deal by September 3.