The calculated distance (air line) between San Sebastián de Mariquita and Sonsón is approximately 46 miles respectively 73 kilometers.
By car or train, the actual journey to Sonsón is certainly longer, as only the direct route (as the crow flies) between San Sebastián de Mariquita and Sonsón has been calculated here.
Air line (approximately)
73 kilometers
40 nautical miles