The calculated distance (air line) between Montigny-le-Bretonneux and Orléans is approximately 60 miles respectively 96 kilometers.
By car or train, the actual journey to Orléans is certainly longer, as only the direct route (as the crow flies) between Montigny-le-Bretonneux and Orléans has been calculated here.
Air line (approximately)
96 kilometers
52 nautical miles