Luxury liner
From Memory Alpha, the free Star Trek reference
A luxury liner was a type of ship or starship designed for travel with a focus on comfort.
Captain Archer once noted that the Enterprise (NX-01) was not a luxury liner. (ENT: "Babel One") In 2364, Ralph Offenhouse noted that the service of USS Enterprise-D was nothing compared to a luxury liner from the 20th century, the QE2. (TNG: "The Neutral Zone") The Enterprise-D herself was considered a luxury liner, at least by Captain Robert DeSoto, echoing the great attention that had been given to crew comfort in the design of the Galaxy-class. (TNG: "Tin Man")
