Vacations to Go offers a Carnival Cruise 5-Night Western Caribbean Cruise for Two bundled with a cabin upgrade and $50 onboard credit with prices starting at $618, as provided by ShermansTravel. (If prompted, sign up for the free newsletter to see this deal.) That's the lowest price we could find for this cruise by $120, excluding the credit. This roundtrip cruise departs from Miami, FL, on April 19 with stops in Ocho Rios, Jamaica and Grand Cayman, Cayman Islands. Some restrictions may apply; fees, government taxes, and fuel supplements are additional. Book this travel deal by March 15.