Flight Indira Gandhi International Airport departs from Delhi Indira Gandhi International Airport at 15:45 and arrives at Kolkata Netaji Subhas Chandra Bose International Airport at 18:05.
The flighttime is about 2h 20m. The distance travelled ("as the bird flies"): 1262 Km. So the average speed is roughly 541 Km.
The best day to arrive at Delhi is Wednesday and it would be best to avoid Monday, as prices are on average 59.45% higher than on Wednesday. (Average prices, based on 3011914 datapoints.)
We have a lot more statistics for flights AI 2737 and between Delhi and Kolkata.