Cruise.com offers a Carnival Cruises 4-Night Mexico Cruise for Two, with prices starting from $598, as provided by ShermansCruise. (Click the Cruise.com tab on the landing page and select the top offer.) That's the lowest price we could find by $200. This roundtrip cruise aboard the Carnival Inspiration departs on August 28 from Long Beach, CA, with stops in Catalina Island, CA, and Ensenada, Mexico. Additional fees may apply. Book this travel deal by May 31.