The calculated distance (air line) between Romainville and Neuilly-Plaisance is approximately 4 miles respectively 6 kilometers.
By car or train, the actual journey to Neuilly-Plaisance is certainly longer, as only the direct route (as the crow flies) between Romainville and Neuilly-Plaisance has been calculated here.
Air line (approximately)
6 kilometers
3 nautical miles