Vacations To Go offers a Carnival Cruise 6-Night Caribbean Cruise for Two with prices starting at $638. That's the third-best rate we've seen this year for any 6-night Caribbean cruise on Carnival. It's also the lowest current rate we could find for this cruise by $380. This roundtrip cruise departs from Fort Lauderdale, FL, on February 2, 2014 with stops in Key West, FL; Grand Cayman, Cayman Islands; and Ocho Rios Jamaica. Some restrictions may apply; fees, government taxes, and fuel supplements are additional. This travel deal ends December 7.