The calculated distance (air line) between Montigny-lès-Cormeilles and Le Mans is approximately 114 miles respectively 183 kilometers.
By car or train, the actual journey to Le Mans is certainly longer, as only the direct route (as the crow flies) between Montigny-lès-Cormeilles and Le Mans has been calculated here.
Air line (approximately)
183 kilometers
99 nautical miles