The calculated distance (air line) between Le Pont-de-Claix and Besançon is approximately 148 miles respectively 238 kilometers.
By car or train, the actual journey to Besançon is certainly longer, as only the direct route (as the crow flies) between Le Pont-de-Claix and Besançon has been calculated here.
Air line (approximately)
238 kilometers
128 nautical miles