How far in advance should I book train tickets from Geneva to Chamonix-Mont-Blanc?

The best time to book your train from Geneva to Chamonix-Mont-Blanc is <b>49 days before departure</b>. See how prices for trains change on the Geneva to Chamonix-Mont-Blanc route.预订从日内瓦至夏蒙尼-勃朗峰的火车，最佳时机为出发前49天。请查看日内瓦至夏蒙尼-勃朗峰路线火车票价的变动情况。