The calculated distance (air line) between Vălenii de Munte and Sector 1 is approximately 48 miles respectively 77 kilometers.
By car or train, the actual journey to Sector 1 is certainly longer, as only the direct route (as the crow flies) between Vălenii de Munte and Sector 1 has been calculated here.
Air line (approximately)
77 kilometers
41 nautical miles