The calculated distance (air line) between Flers-en-Escrebieux and Le Havre is approximately 145 miles respectively 234 kilometers.
By car or train, the actual journey to Le Havre is certainly longer, as only the direct route (as the crow flies) between Flers-en-Escrebieux and Le Havre has been calculated here.
Air line (approximately)
234 kilometers
126 nautical miles