Flight Indira Gandhi International Airport departs from Delhi Indira Gandhi International Airport at 04:30 and arrives at Guwahati Lokpriya Gopinath Bordoloi International Airport at 06:50.
The flighttime is about 2h 20m. The distance travelled ("as the bird flies"): 1609 Km. So the average speed is roughly 690 Km.
The best day to arrive at Delhi is Wednesday and it would be best to avoid Sunday, as prices are on average 287.82% higher than on Wednesday. (Average prices, based on 697662 datapoints.)
We have a lot more statistics for flights IX 787 and between Delhi and Guwahati.