The calculated distance (air line) between Sirajganj and Bhairab Bāzār is approximately 85 miles respectively 136 kilometers.
By car or train, the actual journey to Bhairab Bāzār is certainly longer, as only the direct route (as the crow flies) between Sirajganj and Bhairab Bāzār has been calculated here.
Air line (approximately)
136 kilometers
74 nautical miles