Flight Indira Gandhi International Airport departs from Delhi Indira Gandhi International Airport at 01:55 and arrives at Chicago O'Hare International Airport at 08:40.
The flighttime is about 17h 15m. The distance travelled ("as the bird flies"): 18354 Km. So the average speed is roughly 1064 Km.
There is an 10.5 hour time difference between Delhi and Chicago