The calculated distance (air line) between Sainte-Geneviève-des-Bois and Reims is approximately 89 miles respectively 142 kilometers.
By car or train, the actual journey to Reims is certainly longer, as only the direct route (as the crow flies) between Sainte-Geneviève-des-Bois and Reims has been calculated here.
Air line (approximately)
142 kilometers
77 nautical miles