Flight Indira Gandhi International Airport departs from Delhi Indira Gandhi International Airport at 16:00 and arrives at Ranchi Birsa Munda Airport at 17:25.
The flighttime is about 1h 25m. The distance travelled ("as the bird flies"): 916 Km. So the average speed is roughly 647 Km.
The best day to arrive at Delhi is Wednesday and it would be best to avoid Sunday, as prices are on average 93.29% higher than on Wednesday. (Average prices, based on 114988 datapoints.)
We have a lot more statistics for flights I5 589 and between Delhi and Ranchi.