The calculated distance (air line) between Amersham on the Hill and Abbots Langley is approximately 8 miles respectively 14 kilometers.
By car or train, the actual journey to Abbots Langley is certainly longer, as only the direct route (as the crow flies) between Amersham on the Hill and Abbots Langley has been calculated here.
Air line (approximately)
14 kilometers
7 nautical miles