Osimo 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 Osimo-Castelfidardo and arrive at Trieste Centrale every 30 minutes on average. If travelling with Trenitalia, you need to know the Osimo to Trieste train schedule: the first train leaves at 07:04, while the last ride is at 22:24. A Osimo to Trieste train cost about 36.65 €. But how long is the train ride from Osimo to Trieste? Your journey takes about 9 hours on average.