Flight International Airport departs from Doha International Airport at 18:55 and arrives at Kolkata Netaji Subhas Chandra Bose International Airport at 02:05.
The flighttime is about 4h 40m. The distance travelled ("as the bird flies"): 4101 Km. So the average speed is roughly 879 Km.
There is an 2.5 hour time difference between Doha and Kolkata