The calculated distance (air line) between As Sulaymānīyah and Bonāb is approximately 127 miles respectively 205 kilometers.
By car or train, the actual journey to Bonāb is certainly longer, as only the direct route (as the crow flies) between As Sulaymānīyah and Bonāb has been calculated here.
Air line (approximately)
205 kilometers
111 nautical miles