The calculated distance (air line) between Bonchamp-lès-Laval and Nantes is approximately 71 miles respectively 115 kilometers.
By car or train, the actual journey to Nantes is certainly longer, as only the direct route (as the crow flies) between Bonchamp-lès-Laval and Nantes has been calculated here.
Air line (approximately)
115 kilometers
62 nautical miles