Sondrio to Trieste 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 Sondrio and arrive at Trieste Centrale every about 1 hour on average. If travelling with Trenitalia, you need to know the Sondrio to Trieste train schedule: the first train leaves at 04:32, while the last ride is at 17:38. A Sondrio to Trieste train cost about 39.5 €. But how long is the train ride from Sondrio to Trieste? Your journey takes about 7 hours on average.