The calculated distance (air line) between Châteaugiron and Paris 16 Passy is approximately 182 miles respectively 293 kilometers.
By car or train, the actual journey to Paris 16 Passy is certainly longer, as only the direct route (as the crow flies) between Châteaugiron and Paris 16 Passy has been calculated here.
Air line (approximately)
293 kilometers
158 nautical miles