Vacations to Go offers a Carnival Cruises 4-Night Mexico Cruise for Two with prices starting from $338. That's $20 under our mention from five days ago and the lowest price we could find now by $60. (It's also the lowest we've seen for a cruise with this itinerary in well over a year.) This roundtrip cruise aboard the Carnival Inspiration departs on December 4. Additional fees may apply. Book this travel deal by November 1.