Until August 31, the cruise line is accepting a $1 deposit on selected cruises departing after December 5, 2016.
Also included are free upgrades to an oceanview room and onboard credit ranging from $100* to $600* per room.
Past guests receive a variety of bonuses including a complimentary meal in P&O’s specialty restaurant Salt grill by Luke Mangan during P&O Explorer itineraries.
For P&O Sea Australia Itineraries, there is a free mystery shore excursion available, while for P&O Sea Asia itineraries, the cruise line is offering past guests $200* credit towards a flight.
Any past guest who books a P&O Islands or Sea Break will also be entitled to 50 per cent more onboard credit per room.
If December is too far on the horizon, P&O Cruises has a separate deal offering onboard credit of up to $150* per room for cruises departing before December 4, 2016.