The calculated distance (air line) between Idkū and Kawm Ḩamādah is approximately 45 miles respectively 72 kilometers.
By car or train, the actual journey to Kawm Ḩamādah is certainly longer, as only the direct route (as the crow flies) between Idkū and Kawm Ḩamādah has been calculated here.
Air line (approximately)
72 kilometers
39 nautical miles