Princess Cruises offers up to 2-for-1 fares on select Summer 2018 Alaskan Cruises. (Prices listed are per-person after discount, based on double occupancy.) Save on a range of north- and southbound itineraries aboard the Golden Princess, Coral Princess, Star Princess, or Island Princess. Additional fees may apply. Book this travel deal by May 30 for cruises on select dates through July 25.