The calculated distance (air line) between Ashton-under-Lyne and Poynton is approximately 10 miles respectively 15 kilometers.
By car or train, the actual journey to Poynton is certainly longer, as only the direct route (as the crow flies) between Ashton-under-Lyne and Poynton has been calculated here.
Air line (approximately)
15 kilometers
8 nautical miles