Flight International Airport departs from Abu Dhabi International Airport at 02:20 and arrives at Athens Athens International Airport Eleftherios Venizelos at 06:30.
The flighttime is about 5h 10m. The distance travelled ("as the bird flies"): 3592 Km. So the average speed is roughly 695 Km.
There is an 1 hour time difference between Abu Dhabi and Athens