The calculated distance (air line) between Al Ḩudaydah and Al Ḩazm is approximately 154 miles respectively 247 kilometers.
By car or train, the actual journey to Al Ḩazm is certainly longer, as only the direct route (as the crow flies) between Al Ḩudaydah and Al Ḩazm has been calculated here.
Air line (approximately)
247 kilometers
134 nautical miles