The calculated distance (air line) between Saulx-les-Chartreux and Reims is approximately 89 miles respectively 144 kilometers.
By car or train, the actual journey to Reims is certainly longer, as only the direct route (as the crow flies) between Saulx-les-Chartreux and Reims has been calculated here.
Air line (approximately)
144 kilometers
77 nautical miles