The calculated distance (air line) between Maḩallat Damanah and Ḩalwān is approximately 86 miles respectively 138 kilometers.
By car or train, the actual journey to Ḩalwān is certainly longer, as only the direct route (as the crow flies) between Maḩallat Damanah and Ḩalwān has been calculated here.
Air line (approximately)
138 kilometers
75 nautical miles