The calculated distance (air line) between Al Mishkhāb and Al Musayyib is approximately 68 miles respectively 110 kilometers.
By car or train, the actual journey to Al Musayyib is certainly longer, as only the direct route (as the crow flies) between Al Mishkhāb and Al Musayyib has been calculated here.
Air line (approximately)
110 kilometers
59 nautical miles