The calculated distance (air line) between Vânju-Mare and Ploieşti is approximately 159 miles respectively 256 kilometers.
By car or train, the actual journey to Ploieşti is certainly longer, as only the direct route (as the crow flies) between Vânju-Mare and Ploieşti has been calculated here.
Air line (approximately)
256 kilometers
138 nautical miles