The calculated distance (air line) between Dhaka and Bhairab Bāzār is approximately 43 miles respectively 69 kilometers.
By car or train, the actual journey to Bhairab Bāzār is certainly longer, as only the direct route (as the crow flies) between Dhaka and Bhairab Bāzār has been calculated here.
Air line (approximately)
69 kilometers
37 nautical miles