Erba to Trento 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 Moiana and arrive at Trento every about 1 hour on average. If travelling with Trenitalia, you need to know the Erba to Trento train schedule: the first train leaves at 07:00, while the last ride is at 18:16. A Erba to Trento train cost about 30.15 €. But how long is the train ride from Erba to Trento? Your journey takes about 5 hours on average.