The calculated distance (air line) between Shāhīn Dezh and Bonāb is approximately 54 miles respectively 86 kilometers.
By car or train, the actual journey to Bonāb is certainly longer, as only the direct route (as the crow flies) between Shāhīn Dezh and Bonāb has been calculated here.
Air line (approximately)
86 kilometers
47 nautical miles