The calculated distance (air line) between Piatra Olt and Ploieşti is approximately 95 miles respectively 153 kilometers.
By car or train, the actual journey to Ploieşti is certainly longer, as only the direct route (as the crow flies) between Piatra Olt and Ploieşti has been calculated here.
Air line (approximately)
153 kilometers
82 nautical miles