The calculated distance (air line) between Fontaines-sur-Saône and Aix-en-Provence is approximately 162 miles respectively 261 kilometers.
By car or train, the actual journey to Aix-en-Provence is certainly longer, as only the direct route (as the crow flies) between Fontaines-sur-Saône and Aix-en-Provence has been calculated here.
Air line (approximately)
261 kilometers
141 nautical miles