Sienna to Ventimiglia 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 Ventimiglia every about 1 hour on average. If travelling with Trenitalia, you need to know the Sienna to Ventimiglia train schedule: the first train leaves at 07:15, while the last ride is at 21:26. A Sienna to Ventimiglia train cost about 32.2 €. But how long is the train ride from Sienna to Ventimiglia? Your journey takes about 8 hours on average.