The calculated distance (air line) between Al Kūt and An Nu‘mānīyah is approximately 24 miles respectively 38 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 Al Kūt and An Nu‘mānīyah has been calculated here.
Air line (approximately)
38 kilometers
21 nautical miles