The calculated distance (air line) between Sheung Shui and Tseung Kwan O is approximately 16 miles respectively 25 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 Sheung Shui and Tseung Kwan O has been calculated here.
Air line (approximately)
25 kilometers
14 nautical miles