Poggibonsi 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 Poggibonsi-S. Gimignano and arrive at Siderno every about 4 hours on average. If travelling with Trenitalia, you need to know the Poggibonsi to Siderno train schedule: the first train leaves at 06:48, while the last ride is at 19:46. A Poggibonsi to Siderno train cost about 121.0 €. But how long is the train ride from Poggibonsi to Siderno? Your journey takes about 13 hours on average.