The calculated distance (air line) between Menton and Aix-en-Provence is approximately 104 miles respectively 168 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 Menton and Aix-en-Provence has been calculated here.
Air line (approximately)
168 kilometers
90 nautical miles