Discounts are offered from 29 July to 10 August on eight or twelve night departures between April and October 2021.
The cruises will sail round-trip from Southampton on the 3,080-guest Crown Princess, which will be based in the UK next summer.
Fares start at £649pp for an eight-night cruise and £799pp for a twelve-night cruise. Some itineraries offer third and fourth guest fares from £149pp.
Deals include a 12-night British Isles with Portland cruise calling at Portland in Guernsey, Cork (Cobh), Dublin, Belfast, Glasgow, Invergordon, Edinburgh and Le Havre.
Prices from £799pp for two people sharing an inside stateroom and £199pp for third and fourth guests mean a family of four could travel for £499pp.
Crown Princess will also sail an eight-night Ireland and Scotland cruise calling at Portland, Cobh, Dublin, Glasgow and Holyhead. Prices are from £649pp for two people sharing an inside stateroom departing in April.
Tony Roberts, vice president of Princess Cruises UK and Europe, said: “We are thrilled to offer our guests some great value deals for those seeking a fantastic holiday option a little closer to home."
