Flight Indira Gandhi International Airport departs from Delhi Indira Gandhi International Airport at 16:35 and arrives at Ranchi Birsa Munda Airport at 18:40.
The flighttime is about 2h 05m. The distance travelled ("as the bird flies"): 916 Km. So the average speed is roughly 440 Km.
The best day to arrive at Delhi is Tuesday and it would be best to avoid Sunday, as prices are on average 209.6% higher than on Tuesday. (Average prices, based on 115755 datapoints.)
We have a lot more statistics for flights I5 545 and between Delhi and Ranchi.