Flight Indira Gandhi International Airport departs from Delhi Indira Gandhi International Airport at 12:30 and arrives at Chennai Chennai International Airport at 15:20.
The flighttime is about 2h 50m. The distance travelled ("as the bird flies"): 479 Km. So the average speed is roughly 169 Km.
The best month to arrive at Delhi is September and the most expensive month to fly is December. (Average prices, based on 210 datapoints.)
We have a lot more statistics for flights 6E 434 and between Delhi and Chennai.