The calculated distance (air line) between Negru Vodă and Ploieşti is approximately 133 miles respectively 214 kilometers.
By car or train, the actual journey to Ploieşti is certainly longer, as only the direct route (as the crow flies) between Negru Vodă and Ploieşti has been calculated here.
Air line (approximately)
214 kilometers
116 nautical miles