The calculated distance (air line) between Buenaventura and Santander de Quilichao is approximately 53 miles respectively 86 kilometers.
By car or train, the actual journey to Santander de Quilichao is certainly longer, as only the direct route (as the crow flies) between Buenaventura and Santander de Quilichao has been calculated here.
Air line (approximately)
86 kilometers
46 nautical miles