The calculated distance (air line) between Cournon-d'Auvergne and Besançon is approximately 170 miles respectively 273 kilometers.
By car or train, the actual journey to Besançon is certainly longer, as only the direct route (as the crow flies) between Cournon-d'Auvergne and Besançon has been calculated here.
Air line (approximately)
273 kilometers
148 nautical miles