The calculated distance (air line) between Mehrān and Ad Dīwānīyah is approximately 106 miles respectively 171 kilometers.
By car or train, the actual journey to Ad Dīwānīyah is certainly longer, as only the direct route (as the crow flies) between Mehrān and Ad Dīwānīyah has been calculated here.
Air line (approximately)
171 kilometers
92 nautical miles