The calculated distance (air line) between L'Haÿ-les-Roses and Amiens is approximately 77 miles respectively 125 kilometers.
By car or train, the actual journey to Amiens is certainly longer, as only the direct route (as the crow flies) between L'Haÿ-les-Roses and Amiens has been calculated here.
Air line (approximately)
125 kilometers
67 nautical miles