Trieste to Treviglio 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 Trieste Centrale and arrive at Treviglio every about 1 hour on average. If travelling with Trenitalia, you need to know the Trieste to Treviglio train schedule: the first train leaves at 06:38, while the last ride is at 17:01. A Trieste to Treviglio train cost about 48.3 €. But how long is the train ride from Trieste to Treviglio? Your journey takes about 5 hours on average.