The calculated distance (air line) between Dijon and Châlons-en-Champagne is approximately 117 miles respectively 188 kilometers.
By car or train, the actual journey to Châlons-en-Champagne is certainly longer, as only the direct route (as the crow flies) between Dijon and Châlons-en-Champagne has been calculated here.
Air line (approximately)
188 kilometers
102 nautical miles