The calculated distance (air line) between Fianarantsoa and Soavinandriana is approximately 160 miles respectively 257 kilometers.
By car or train, the actual journey to Soavinandriana is certainly longer, as only the direct route (as the crow flies) between Fianarantsoa and Soavinandriana has been calculated here.
Air line (approximately)
257 kilometers
139 nautical miles