The current P&O Cruises flagship, Britannia, is of the same Royal Class design as the last three Princess ships. For booking purposes, P&O Cruises considers anyone who will be 18 or older at the . 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.
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 company’s aim is to . The company charters major cruise ships like the Norwegian Pearl to offer music festivals at sea — a great way to meet like-minded adults. The Kiss Cruise from Miami features two shows from Kiss (one .