The calculated distance (air line) between Qala i Naw and Chahār Burj is approximately 74 miles respectively 119 kilometers.
By car or train, the actual journey to Chahār Burj is certainly longer, as only the direct route (as the crow flies) between Qala i Naw and Chahār Burj has been calculated here.
Air line (approximately)
119 kilometers
64 nautical miles