The calculated distance (air line) between Fianarantsoa and Vangaindrano is approximately 135 miles respectively 218 kilometers.
By car or train, the actual journey to Vangaindrano is certainly longer, as only the direct route (as the crow flies) between Fianarantsoa and Vangaindrano has been calculated here.
Air line (approximately)
218 kilometers
117 nautical miles