Flight Indira Gandhi International Airport departs from Delhi Indira Gandhi International Airport at 06:35 and arrives at Istanbul Istanbul Atatürk Airport at 11:15.
The flighttime is about 7h 10m. The distance travelled ("as the bird flies"): 5409 Km. So the average speed is roughly 755 Km.
There is an 2.5 hour time difference between Delhi and Istanbul