Arena Po to Naples 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 Arena Po and arrive at Napoli Centrale every 60 minutes on average. If travelling with Trenitalia, you need to know the Arena Po to Naples train schedule: the first train leaves at 06:43, while the last ride is at 21:04. A Arena Po to Naples train cost about 42.3 €. But how long is the train ride from Arena Po to Naples? Your journey takes about 7 hours on average.