The calculated distance (air line) between Kamalpur and Maulavi Bāzār is approximately 21 miles respectively 33 kilometers.
By car or train, the actual journey to Maulavi Bāzār is certainly longer, as only the direct route (as the crow flies) between Kamalpur and Maulavi Bāzār has been calculated here.
Air line (approximately)
33 kilometers
18 nautical miles