The most popular itineraries booked with the line were the Caribbean, the Western Mediterranean and the Norwegian fjords.
P&O Cruises president Paul Ludlow said these record-breaking days are "testament to the fact that a P&O Cruises holiday provides extraordinary value for money" – an aspect he described as "critical".
"There are so many priorities for our hard-earned or hard-saved money in the current climate and a cruise offers an almost all-inclusive, individual holiday," he added.
