The calculated distance (air line) between Curanilahue and Talcahuano is approximately 54 miles respectively 86 kilometers.
By car or train, the actual journey to Talcahuano is certainly longer, as only the direct route (as the crow flies) between Curanilahue and Talcahuano has been calculated here.
Air line (approximately)
86 kilometers
46 nautical miles