The calculated distance (air line) between Ḩawallī and Al Faḩāḩīl is approximately 18 miles respectively 30 kilometers.
By car or train, the actual journey to Al Faḩāḩīl is certainly longer, as only the direct route (as the crow flies) between Ḩawallī and Al Faḩāḩīl has been calculated here.
Air line (approximately)
30 kilometers
16 nautical miles