The calculated distance (air line) between Margny-lès-Compiègne and Amiens is approximately 40 miles respectively 65 kilometers.
By car or train, the actual journey to Amiens is certainly longer, as only the direct route (as the crow flies) between Margny-lès-Compiègne and Amiens has been calculated here.
Air line (approximately)
65 kilometers
35 nautical miles