The calculated distance (air line) between Khulna and Maulavi Bāzār is approximately 182 miles respectively 292 kilometers.
By car or train, the actual journey to Maulavi Bāzār is certainly longer, as only the direct route (as the crow flies) between Khulna and Maulavi Bāzār has been calculated here.
Air line (approximately)
292 kilometers
158 nautical miles