Flight Indira Gandhi International Airport departs from Delhi Indira Gandhi International Airport at 16:10 and arrives at Ranchi Birsa Munda Airport at 18:05.
The flighttime is about 1h 55m. The distance travelled ("as the bird flies"): 916 Km. So the average speed is roughly 478 Km.
The best day to arrive at Delhi is Wednesday and it would be best to avoid Sunday, as prices are on average 115% higher than on Wednesday. (Average prices, based on 118147 datapoints.)
We have a lot more statistics for flights I5 776 and between Delhi and Ranchi.