Flight Indira Gandhi International Airport departs from Delhi Indira Gandhi International Airport at 06:10 and arrives at Istanbul Istanbul Atatürk Airport at 10:45.
The flighttime is about 8h 05m. The distance travelled ("as the bird flies"): 5409 Km. So the average speed is roughly 669 Km.
There is an 3.5 hour time difference between Delhi and Istanbul