Sienna to Augusta 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 Siena and arrive at Augusta every about 3 hours on average. If travelling with Trenitalia, you need to know the Sienna to Augusta train schedule: the first train leaves at 17:43, while the last ride is at 21:26. A Sienna to Augusta train cost about 114.4 €. But how long is the train ride from Sienna to Augusta? Your journey takes about 16 hours on average.