The calculated distance (air line) between Chalfont St Giles and Abbots Langley is approximately 8 miles respectively 13 kilometers.
By car or train, the actual journey to Abbots Langley is certainly longer, as only the direct route (as the crow flies) between Chalfont St Giles and Abbots Langley has been calculated here.
Air line (approximately)
13 kilometers
7 nautical miles