Flight International Airport departs from Abu Dhabi International Airport at 09:15 and arrives at Athens Athens International Airport Eleftherios Venizelos at 13:30.
The flighttime is about 5h 15m. The distance travelled ("as the bird flies"): 3592 Km. So the average speed is roughly 684 Km.
There is an 1 hour time difference between Abu Dhabi and Athens