Roma Outlet Village can be reached from Roma Tiburtina, Roma Termini, and Roma Ostiense stations via regional trains to Fara Sabina–Montelibretti or Orte stations.
Travel times: about 30–45 minutes from Rome and about 30 minutes from Viterbo (via Orte).
From the stations, continue with Cotral bus connections towards Sant’Oreste, Ponzano Soratte, or Fiano 

Romano, up to the stops closest to the Outlet Village.
Buy train tickets here:
Trenitalia
Italo