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.
