The calculated distance (air line) between Jannātah and Banī Na‘īm is approximately 11 miles respectively 18 kilometers.
By car or train, the actual journey to Banī Na‘īm is certainly longer, as only the direct route (as the crow flies) between Jannātah and Banī Na‘īm has been calculated here.
Air line (approximately)
18 kilometers
10 nautical miles