The calculated distance (air line) between Mihăileşti and Ploieşti is approximately 43 miles respectively 70 kilometers.
By car or train, the actual journey to Ploieşti is certainly longer, as only the direct route (as the crow flies) between Mihăileşti and Ploieşti has been calculated here.
Air line (approximately)
70 kilometers
38 nautical miles