The calculated distance (air line) between Tin Shui Wai and Sai Kung is approximately 18 miles respectively 28 kilometers.
By car or train, the actual journey to Sai Kung is certainly longer, as only the direct route (as the crow flies) between Tin Shui Wai and Sai Kung has been calculated here.
Air line (approximately)
28 kilometers
15 nautical miles