The calculated distance (air line) between Mandalī and An Nu‘mānīyah is approximately 83 miles respectively 133 kilometers.
By car or train, the actual journey to An Nu‘mānīyah is certainly longer, as only the direct route (as the crow flies) between Mandalī and An Nu‘mānīyah has been calculated here.
Air line (approximately)
133 kilometers
72 nautical miles