The calculated distance (air line) between Sédhiou and Niakoul Rab is approximately 184 miles respectively 296 kilometers.
By car or train, the actual journey to Niakoul Rab is certainly longer, as only the direct route (as the crow flies) between Sédhiou and Niakoul Rab has been calculated here.
Air line (approximately)
296 kilometers
160 nautical miles