Luxury cruises aren’t hard to find, but the most expensive packages, these days, are all-inclusive. Though every cruise includes something along with the basic fare, this new brand of all-inclusive luxury often incorporates business-class flights to and from the port-of-origin, five-star hotel rooms before embarking and after disembarking, premium wine and spirits, on-board entertainment and classes, and off-board activities. For the truly luxe, some cruises offer butler service in their most high-end suites.