We will be travelling to Italy in May/2019 arriving in Rome and then must make our way to Naples. We plan to take the Leonardo Express to Termini and then on to Naples. Is it advisable to purchase our train tickets ahead of time? My concern is booking train tickets and then our flight is delayed. Would we be safe in just getting tickets when we arrive at Termini?
Is there a big difference in price between buying online months ahead of time and buying at the station when we arrive?