The Fantasy class is a cruise ship class operated by Carnival Cruise Lines. The first vessel of the class, Carnival Fantasy, entered service in 1990. All eight vessels of the class were constructed by Kvaerner Masa-Yards, in Helsinki, Finland, at the Hietalahti shipyard.

Cruise ships are large passenger ships used mainly for vacationing. Unlike ocean liners, which are used for transport, cruise ships typically embark on round-trip voyages to various ports of call, where passengers may go on tours known as "shore excursions". On "cruises to nowhere" or "nowhere voyages", some cruise ships make two- to three-night round trips without visiting any ports of call.