Flight King Khaled International Airport departs from Riyadh King Khaled International Airport at 00:10 and arrives at Dhaka Shahjalal International Airport at 08:55.
The flighttime is about 5h 45m. The distance travelled ("as the bird flies"): 4859 Km. So the average speed is roughly 845 Km.
There is an 3 hour time difference between Riyadh and Dhaka