Flight Leonardo da Vinci–Fiumicino Airport departs from Rome Leonardo da Vinci–Fiumicino Airport at 09:20 and arrives at Sofia Sofia Airport at 12:05.
The flighttime is about 1h 45m. The distance travelled ("as the bird flies"): 1245 Km. So the average speed is roughly 711 Km.
There is an 1 hour time difference between Rome and Sofia