The calculated distance (air line) between Ngong Ping and Tseung Kwan O is approximately 23 miles respectively 37 kilometers.
By car or train, the actual journey to Tseung Kwan O is certainly longer, as only the direct route (as the crow flies) between Ngong Ping and Tseung Kwan O has been calculated here.
Air line (approximately)
37 kilometers
20 nautical miles