Formia 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 Formia-Gaeta and arrive at Trieste Centrale every 60 minutes on average. If travelling with Trenitalia, you need to know the Formia to Trieste train schedule: the first train leaves at 05:18, while the last ride is at 20:33. A Formia to Trieste train cost about 66.7 €. But how long is the train ride from Formia to Trieste? Your journey takes about 10 hours on average. Thanks to Trenitalia, offers, you can save on your trip from Formia to Trieste and find low cost tickets starting from 79 €!