The calculated distance (air line) between Torbat-e Ḩeydarīyeh and Kuhsān is approximately 120 miles respectively 193 kilometers.
By car or train, the actual journey to Kuhsān is certainly longer, as only the direct route (as the crow flies) between Torbat-e Ḩeydarīyeh and Kuhsān has been calculated here.
Air line (approximately)
193 kilometers
104 nautical miles