How far in advance should I book train tickets from Milan to Varenna?

The best time to book your train from Milan to Varenna is <b>day before departure</b>. See how prices for trains change on the Milan to Varenna route.预订从米兰至瓦雷纳的火车，最佳时机为出发前一天。观察米兰至瓦雷纳线路火车票价的变化情况。