The calculated distance (air line) between Marseille 02 and Marseille 04 is approximately 2 miles respectively 3 kilometers.
By car or train, the actual journey to Marseille 04 is certainly longer, as only the direct route (as the crow flies) between Marseille 02 and Marseille 04 has been calculated here.
Air line (approximately)
3 kilometers
1 nautical miles