The calculated distance (air line) between Romorantin-Lanthenay and Vierzon is approximately 18 miles respectively 29 kilometers.
By car or train, the actual journey to Vierzon is certainly longer, as only the direct route (as the crow flies) between Romorantin-Lanthenay and Vierzon has been calculated here.
Air line (approximately)
29 kilometers
16 nautical miles