Terni 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 Terni and arrive at Siderno every about 4 hours on average. If travelling with Trenitalia, you need to know the Terni to Siderno train schedule: the first train leaves at 11:23, while the last ride is at 21:18. A Terni to Siderno train cost about 70.4 €. But how long is the train ride from Terni to Siderno? Your journey takes about 10 hours on average.