The calculated distance (air line) between Champagne-au-Mont-d'Or and Mulhouse is approximately 181 miles respectively 291 kilometers.
By car or train, the actual journey to Mulhouse is certainly longer, as only the direct route (as the crow flies) between Champagne-au-Mont-d'Or and Mulhouse has been calculated here.
Air line (approximately)
291 kilometers
157 nautical miles