Flight Indira Gandhi International Airport departs from Delhi Indira Gandhi International Airport at 16:55 and arrives at Varanasi Lal Bahadur Shastri Airport at 18:25.
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 Saturday and it would be best to avoid Wednesday, as prices are on average 112.43% higher than on Saturday. (Average prices, based on 201107 datapoints.)
We have a lot more statistics for flights 6E 2235 and between Delhi and Varanasi.
