Flight King Khaled International Airport departs from Riyadh King Khaled International Airport at 09:40 and arrives at Dhaka Shahjalal International Airport at 18:05.
The flighttime is about 5h 25m. The distance travelled ("as the bird flies"): 4859 Km. So the average speed is roughly 897 Km.
There is an 3 hour time difference between Riyadh and Dhaka