Flight Indira Gandhi International Airport departs from Delhi Indira Gandhi International Airport at 13:55 and arrives at Varanasi Lal Bahadur Shastri Airport at 15:30.
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 Tuesday, as prices are on average 339.11% higher than on Saturday. (Average prices, based on 191075 datapoints.)
We have a lot more statistics for flights 6E 2004 and between Delhi and Varanasi.