Flight Shahjalal International Airport departs from Dhaka Shahjalal International Airport at 21:00 and arrives at Delhi Indira Gandhi International Airport at 23:00.
The flighttime is about 2h 30m. The distance travelled ("as the bird flies"): 1477 Km. So the average speed is roughly 591 Km.
There is an 0.5 hour time difference between Dhaka and Delhi