Flight Netaji Subhas Chandra Bose International Airport departs from Kolkata Netaji Subhas Chandra Bose International Airport at 21:10 and arrives at Bangkok Don Mueang International Airport at 01:15.
The flighttime is about 2h 35m. The distance travelled ("as the bird flies"): 1350 Km. So the average speed is roughly 523 Km.
There is an 1.5 hour time difference between Kolkata and Bangkok