Flight Leonardo da Vinci–Fiumicino Airport departs from Rome Leonardo da Vinci–Fiumicino Airport at 10:40 and arrives at Shenzhen Shenzhen Bao'an International Airport at 05:00.
The flighttime is about 12h 20m. The distance travelled ("as the bird flies"): 11151 Km. So the average speed is roughly 904 Km.
There is an 6 hour time difference between Rome and Shenzhen
THB
