The connections provide one train on average every 15 minutes (varies according to time-band and whether weekday or public holiday), with a journey duration of 42 minutes from Rome-Tiburtina to the airport.  

La prima corsa parte da Roma Tiburtina alle ore 05:06 e arriva all’aeroporto alle 05:48. 

The first train leaves Rome Tiburtina at 05:06 and arrives at the airport at 05:48.

To see the timetables in detail click here and run a search.