Formia to Treviglio 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 Formia-Gaeta and arrive at Treviglio every 60 minutes on average. If travelling with Trenitalia, you need to know the Formia to Treviglio train schedule: the first train leaves at 04:18, while the last ride is at 22:39. A Formia to Treviglio train cost about 73.1 €. But how long is the train ride from Formia to Treviglio? Your journey takes about 7 hours on average.