The calculated distance (air line) between Romans-sur-Isère and Aix-en-Provence is approximately 107 miles respectively 172 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 Romans-sur-Isère and Aix-en-Provence has been calculated here.
Air line (approximately)
172 kilometers
93 nautical miles