Flight International Airport departs from Abu Dhabi International Airport at 09:20 and arrives at Colombo Bandaranaike International Airport at 15:25.
The flighttime is about 4h 35m. The distance travelled ("as the bird flies"): 2873 Km. So the average speed is roughly 627 Km.
There is an 1.5 hour time difference between Abu Dhabi and Colombo