The calculated distance (air line) between Maulavi Bāzār and Baniachang is approximately 26 miles respectively 42 kilometers.
By car or train, the actual journey to Baniachang is certainly longer, as only the direct route (as the crow flies) between Maulavi Bāzār and Baniachang has been calculated here.
Air line (approximately)
42 kilometers
23 nautical miles