The calculated distance (air line) between Lyon 04 and Aix-en-Provence is approximately 158 miles respectively 255 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 Lyon 04 and Aix-en-Provence has been calculated here.
Air line (approximately)
255 kilometers
137 nautical miles