Liberty Travel offers a Carnival Cruise 4-Night Cozumel Cruise for Two with prices starting at $458, as provided by ShermansTravel. That's the lowest price we could find by $100. This roundtrip cruise aboard the Carnival Sensation departs from Miami, FL, on December 14 with stops in Cozumel, Mexico; and Key West, FL. Additional taxes andfees apply. Book this travel deal by August 31.