The calculated distance (air line) between Vălenii de Munte and Constanţa is approximately 145 miles respectively 234 kilometers.
By car or train, the actual journey to Constanţa is certainly longer, as only the direct route (as the crow flies) between Vălenii de Munte and Constanţa has been calculated here.
Air line (approximately)
234 kilometers
126 nautical miles