Como 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 Como S. Giovanni and arrive at Trieste Centrale every about 1 hour on average. If travelling with Trenitalia, you need to know the Como to Trieste train schedule: the first train leaves at 06:36, while the last ride is at 19:13. A Como to Trieste train cost about 58.3 €. But how long is the train ride from Como to Trieste? Your journey takes about 5 hours on average.