The calculated distance (air line) between As Samawah and An Nu‘mānīyah is approximately 85 miles respectively 137 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 As Samawah and An Nu‘mānīyah has been calculated here.
Air line (approximately)
137 kilometers
74 nautical miles