Flight Indira Gandhi International Airport departs from Delhi Indira Gandhi International Airport at 19:00 and arrives at Riyadh King Khaled International Airport at 21:15.
The flighttime is about 4h 45m. The distance travelled ("as the bird flies"): 3385 Km. So the average speed is roughly 713 Km.
There is an 2.5 hour time difference between Delhi and Riyadh