Flight Leonardo da Vinci–Fiumicino Airport departs from Rome Leonardo da Vinci–Fiumicino Airport at 13:00 and arrives at Athens Athens International Airport Eleftherios Venizelos at 15:55.
The flighttime is about 1h 55m. The distance travelled ("as the bird flies"): 1363 Km. So the average speed is roughly 711 Km.
There is an 1 hour time difference between Rome and Athens