The calculated distance (air line) between Bhairab Bāzār and Baniachang is approximately 40 miles respectively 65 kilometers.
By car or train, the actual journey to Baniachang is certainly longer, as only the direct route (as the crow flies) between Bhairab Bāzār and Baniachang has been calculated here.
Air line (approximately)
65 kilometers
35 nautical miles