Flight Indira Gandhi International Airport departs from Delhi Indira Gandhi International Airport at 12:10 and arrives at Varanasi Lal Bahadur Shastri Airport at 13:40.
The flighttime is about 1h 30m. The distance travelled ("as the bird flies"): 642 Km. So the average speed is roughly 428 Km.
The best day to arrive at Delhi is Friday and it would be best to avoid Monday, as prices are on average 109.04% higher than on Friday. (Average prices, based on 162425 datapoints.)
We have a lot more statistics for flights 6E 161 and between Delhi and Varanasi.