Aosta to Olbia 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 Roma Termini every 30 minutes on average. If travelling with Trenitalia, you need to know the Aosta to Olbia train schedule: the first train leaves at 05:16, while the last ride is at 16:38. A Aosta to Olbia train cost about 84.85 €. But how long is the train ride from Aosta to Olbia? Your journey takes about 7 hours on average. Thanks to Trenitalia, offers, you can save on your trip from Aosta to Olbia and find low cost tickets starting from 49 €!