Sarno to Siderno trains might be a good value for money solution: travelling in Italy by train is often rather cheap and faster than taking a bus indeed Trains leave from Sarno and arrive at Siderno every about 2 hours on average. If travelling with Trenitalia, you need to know the Sarno to Siderno train schedule: the first train leaves at 06:56, while the last ride is at 13:00. A Sarno to Siderno train cost about 30.7 €. But how long is the train ride from Sarno to Siderno? Your journey takes about 8 hours on average.