The calculated distance (air line) between La Charité-sur-Loire and Saint-Étienne is approximately 138 miles respectively 221 kilometers.
By car or train, the actual journey to Saint-Étienne is certainly longer, as only the direct route (as the crow flies) between La Charité-sur-Loire and Saint-Étienne has been calculated here.
Air line (approximately)
221 kilometers
119 nautical miles