The calculated distance (air line) between Zefta and Kawm Ḩamādah is approximately 33 miles respectively 52 kilometers.
By car or train, the actual journey to Kawm Ḩamādah is certainly longer, as only the direct route (as the crow flies) between Zefta and Kawm Ḩamādah has been calculated here.
Air line (approximately)
52 kilometers
28 nautical miles