180天可能太长, 可以改变不同航期...
多少钱可查下面网站, 多数是双人价格:
2019--
https://www.cruisespecialists.com/2019-World-Cruises.aspx?gclid=EAIaIQobChMIobWXjOLd2QIVi5N-Ch3pJgDaEAAYASAAEgKXzfD_BwE
2020--
https://www.cruisespecialists.com/2020-World-Cruises.aspx?gclid=EAIaIQobChMIx4-Pv-Dd2QIViD5pCh3eUggxEAAYASAAEgJd1fD_BwE