The calculated distance (air line) between Qahā and Al Maḩallah al Kubrá is approximately 48 miles respectively 77 kilometers.
By car or train, the actual journey to Al Maḩallah al Kubrá is certainly longer, as only the direct route (as the crow flies) between Qahā and Al Maḩallah al Kubrá has been calculated here.
Air line (approximately)
77 kilometers
41 nautical miles