Itachi and Feitao did not stay long in the riverside village, packing their things the next day to head for Jinwu Mountain. However, shortly after leaving Qianchi Mountain, they received news from the village's diner owner that Konoha had been destroyed.
Judging by the timeline, it must have happened seven days ago. In this era without the internet, information traveled very slowly. Coupled with the fact that the Land of Snow had only one slow waterway in addition to the steep mountain trails that only shinobi could scale, news naturally arrived even later.
Of course, the king would likely have known sooner; after all, nobles more or less kept informants stationed out of sight.
Chapter 299