Imperia 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 Imperia Porto Maurizio and arrive at Trieste Centrale every about 2 hours on average. If travelling with Trenitalia, you need to know the Imperia to Trieste train schedule: the first train leaves at 05:35, while the last ride is at 05:35. A Imperia to Trieste train cost about 73.25 €. But how long is the train ride from Imperia to Trieste? Your journey takes about 9 hours on average.