The calculated distance (air line) between Champagne-au-Mont-d'Or and Grenoble is approximately 62 miles respectively 99 kilometers.
By car or train, the actual journey to Grenoble is certainly longer, as only the direct route (as the crow flies) between Champagne-au-Mont-d'Or and Grenoble has been calculated here.
Air line (approximately)
99 kilometers
54 nautical miles