The calculated distance (air line) between Armero-Guyabal and Buenaventura is approximately 165 miles respectively 265 kilometers.
By car or train, the actual journey to Buenaventura is certainly longer, as only the direct route (as the crow flies) between Armero-Guyabal and Buenaventura has been calculated here.
Air line (approximately)
265 kilometers
143 nautical miles