Cruise.com offers a Carnival Cruise 7-Night Western Caribbean Cruise for Two with prices starting at $858, as provided by ShermansCruise. (On the landing page, scroll to the bottom and select the September 16 sailing date.) That's $20 under our mention from last week and the lowest price we could find today for such a cruise in September by $80. This roundtrip cruise aboard the Carnival Freedom departs from Galveston, TX, on September 16 with stops in Roatan, Honduras; Belize City, Belize; and Cozumel, Mexico. Book this travel deal by April 30.