Flight King Khaled International Airport departs from Riyadh King Khaled International Airport at 16:50 and arrives at Dhaka Shahjalal International Airport at 01:35.
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