Flight Indira Gandhi International Airport departs from Delhi Indira Gandhi International Airport at 11:15 and arrives at Varanasi Lal Bahadur Shastri Airport at 12:50.
The flighttime is about 1h 35m. The distance travelled ("as the bird flies"): 642 Km. So the average speed is roughly 405 Km.
The best day to arrive at Delhi is Saturday and it would be best to avoid Friday, as prices are on average 52.57% higher than on Saturday. (Average prices, based on 162816 datapoints.)
We have a lot more statistics for flights G8 406 and between Delhi and Varanasi.