Jul 04, · 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 time of sailing an adult. Fares start at £ (about $) for a . 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 .
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 company’s aim is to make cruising hip, cool and maybe even sexy.