Castelnuovo del Garda 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 Castelnuovo del Garda and arrive at Trieste Centrale every about 2 hours on average. If travelling with Trenitalia, you need to know the Castelnuovo del Garda to Trieste train schedule: the first train leaves at 07:06, while the last ride is at 19:34. A Castelnuovo del Garda to Trieste train cost about 22.0 €. But how long is the train ride from Castelnuovo del Garda to Trieste? Your journey takes about 4 hours on average.