The calculated distance (air line) between Bushehr and As Saffānīyah is approximately 145 miles respectively 234 kilometers.
By car or train, the actual journey to As Saffānīyah is certainly longer, as only the direct route (as the crow flies) between Bushehr and As Saffānīyah has been calculated here.
Air line (approximately)
234 kilometers
126 nautical miles