Flight Indira Gandhi International Airport departs from Delhi Indira Gandhi International Airport at 18:30 and arrives at Guwahati Lokpriya Gopinath Bordoloi International Airport at 21:05.
The flighttime is about 2h 35m. The distance travelled ("as the bird flies"): 1609 Km. So the average speed is roughly 623 Km.
The best day to arrive at Delhi is Sunday and it would be best to avoid Thursday, as prices are on average 110.35% higher than on Sunday. (Average prices, based on 810602 datapoints.)
We have a lot more statistics for flights SG 158 and between Delhi and Guwahati.