Sant'Antimo 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 S. Antimo-S. Arpino and arrive at Siderno every about 1 hour on average. If travelling with Trenitalia, you need to know the Sant'Antimo to Siderno train schedule: the first train leaves at 08:37, while the last ride is at 21:04. A Sant'Antimo to Siderno train cost about 38.6 €. But how long is the train ride from Sant'Antimo to Siderno? Your journey takes about 10 hours on average.