Flight Leonardo da Vinci–Fiumicino Airport departs from Rome Leonardo da Vinci–Fiumicino Airport at 20:20 and arrives at Seoul Incheon International Airport at 14:40.
The flighttime is about 11h 20m. The distance travelled ("as the bird flies"): 12686 Km. So the average speed is roughly 1119 Km.
There is an 7 hour time difference between Rome and Seoul