The calculated distance (air line) between Sainte-Geneviève-des-Bois and Le Mans is approximately 107 miles respectively 172 kilometers.
By car or train, the actual journey to Le Mans is certainly longer, as only the direct route (as the crow flies) between Sainte-Geneviève-des-Bois and Le Mans has been calculated here.
Air line (approximately)
172 kilometers
93 nautical miles