Aosta 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 Aosta and arrive at Trieste Centrale every 60 minutes on average. If travelling with Trenitalia, you need to know the Aosta to Trieste train schedule: the first train leaves at 05:16, while the last ride is at 16:26. A Aosta to Trieste train cost about 44.85 €. But how long is the train ride from Aosta to Trieste? Your journey takes about 9 hours on average.