The calculated distance (air line) between Eslam Qaleh and Neyshābūr is approximately 167 miles respectively 268 kilometers.
By car or train, the actual journey to Neyshābūr is certainly longer, as only the direct route (as the crow flies) between Eslam Qaleh and Neyshābūr has been calculated here.
Air line (approximately)
268 kilometers
145 nautical miles