Nettuno 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 Nettuno and arrive at Siderno every about 12 hours on average. If travelling with Trenitalia, you need to know the Nettuno to Siderno train schedule: the first train leaves at 10:09, while the last ride is at 10:09. A Nettuno to Siderno train cost about 43.6 €. But how long is the train ride from Nettuno to Siderno? Your journey takes about 12 hours on average.