Flight King Khaled International Airport departs from Riyadh King Khaled International Airport at 22:15 and arrives at Delhi Indira Gandhi International Airport at 05:15.
The flighttime is about 4h 30m. The distance travelled ("as the bird flies"): 3385 Km. So the average speed is roughly 752 Km.
There is an 2.5 hour time difference between Riyadh and Delhi