The calculated distance (air line) between Puget-sur-Argens and Saint-Étienne is approximately 177 miles respectively 286 kilometers.
By car or train, the actual journey to Saint-Étienne is certainly longer, as only the direct route (as the crow flies) between Puget-sur-Argens and Saint-Étienne has been calculated here.
Air line (approximately)
286 kilometers
154 nautical miles