Flight Indira Gandhi International Airport departs from Delhi Indira Gandhi International Airport at 17:30 and arrives at Kolkata Netaji Subhas Chandra Bose International Airport at 19:45.
The flighttime is about 2h 15m. The distance travelled ("as the bird flies"): 1262 Km. So the average speed is roughly 561 Km.
The best day to arrive at Delhi is Monday and it would be best to avoid Saturday, as prices are on average 50.75% higher than on Monday. (Average prices, based on 3012063 datapoints.)
We have a lot more statistics for flights UK 707 and between Delhi and Kolkata.