Flight Adolfo Suárez Madrid–Barajas Airport departs from Madrid Adolfo Suárez Madrid–Barajas Airport at 11:40 and arrives at Miami International Airport at 15:45.
The flighttime is about 10h 05m. The distance travelled ("as the bird flies"): 8567 Km. So the average speed is roughly 850 Km.
There is an 6 hour time difference between Madrid and Miami