Aosta 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 Aosta and arrive at Siderno every about 4 hours on average. If travelling with Trenitalia, you need to know the Aosta to Siderno train schedule: the first train leaves at 10:32, while the last ride is at 19:26. A Aosta to Siderno train cost about 106.7 €. But how long is the train ride from Aosta to Siderno? Your journey takes about 20 hours on average.