Flight Indira Gandhi International Airport departs from Delhi Indira Gandhi International Airport at 06:55 and arrives at Istanbul Istanbul Atatürk Airport at 11:25.
The flighttime is about 8h 00m. The distance travelled ("as the bird flies"): 5409 Km. So the average speed is roughly 676 Km.
There is an 3.5 hour time difference between Delhi and Istanbul