The calculated distance (air line) between Qal‘ah-ye Shahr and Khulm is approximately 143 miles respectively 230 kilometers.
By car or train, the actual journey to Khulm is certainly longer, as only the direct route (as the crow flies) between Qal‘ah-ye Shahr and Khulm has been calculated here.
Air line (approximately)
230 kilometers
124 nautical miles