The calculated distance (air line) between Ploieşti and Sfântu Gheorghe is approximately 64 miles respectively 104 kilometers.
By car or train, the actual journey to Sfântu Gheorghe is certainly longer, as only the direct route (as the crow flies) between Ploieşti and Sfântu Gheorghe has been calculated here.
Air line (approximately)
104 kilometers
56 nautical miles