Flight Leonardo da Vinci–Fiumicino Airport departs from Rome Leonardo da Vinci–Fiumicino Airport at 07:50 and arrives at London Heathrow Airport at 09:50.
The flighttime is about 3h 00m. The distance travelled ("as the bird flies"): 1771 Km. So the average speed is roughly 590 Km.
There is an 1 hour time difference between Rome and London