Vacations to Go offers a Carnival Cruise 5-Night Western Caribbean Cruise for Two bundled with a cabin upgrade with prices starting at $658. (If prompted, sign up for the free newsletter to see this deal.) That's the lowest rate we could find for this cruise by $40. This roundtrip cruise departs from Tampa, FL, on April 28 with stops in Grand Cayman, Cayman Islands and Cozumel, Mexico. Some restrictions may apply; fees, government taxes, and fuel supplements are additional. This this travel deal ends April 28.