Flight International Airport departs from Dubai International Airport at 12:00 and arrives at Kolkata Netaji Subhas Chandra Bose International Airport at 18:15.
The flighttime is about 4h 45m. The distance travelled ("as the bird flies"): 3679 Km. So the average speed is roughly 775 Km.
There is an 1.5 hour time difference between Dubai and Kolkata