The calculated distance (air line) between Najaf and Al Miqdādīyah is approximately 139 miles respectively 224 kilometers.
By car or train, the actual journey to Al Miqdādīyah is certainly longer, as only the direct route (as the crow flies) between Najaf and Al Miqdādīyah has been calculated here.
Air line (approximately)
224 kilometers
121 nautical miles