The calculated distance (air line) between Gonbad-e Kāvūs and Baharly is approximately 148 miles respectively 239 kilometers.
By car or train, the actual journey to Baharly is certainly longer, as only the direct route (as the crow flies) between Gonbad-e Kāvūs and Baharly has been calculated here.
Air line (approximately)
239 kilometers
129 nautical miles