The calculated distance (air line) between Az̧ Z̧a‘āyin and Al Khawr is approximately 7 miles respectively 12 kilometers.
By car or train, the actual journey to Al Khawr is certainly longer, as only the direct route (as the crow flies) between Az̧ Z̧a‘āyin and Al Khawr has been calculated here.
Air line (approximately)
12 kilometers
7 nautical miles