The calculated distance (air line) between Saint-Alban-Leysse and Besançon is approximately 115 miles respectively 185 kilometers.
By car or train, the actual journey to Besançon is certainly longer, as only the direct route (as the crow flies) between Saint-Alban-Leysse and Besançon has been calculated here.
Air line (approximately)
185 kilometers
100 nautical miles