Nov 19, · Hitting the seas in , Richard Branson’s Virgin Voyages will be a complete adult-only cruise line. To sail on all its ships, passengers have to be 18 years or older. The brand new . Jul 04, · Created as an offshoot of longtime river cruise company Uniworld, the line operates two adults-only ships that boast sleek, matte black exteriors, mixologists and DJs on board, deck-top .
While not all-inclusive, P&O Cruises offers two adults-only (18+) cruise ships: the 1,passenger Aurora and 2,passenger Arcadia. The British line is a good option if you want a kid-free.