The calculated distance (air line) between Pui O and Tiu Keng Leng is approximately 18 miles respectively 29 kilometers.
By car or train, the actual journey to Tiu Keng Leng is certainly longer, as only the direct route (as the crow flies) between Pui O and Tiu Keng Leng has been calculated here.
Air line (approximately)
29 kilometers
15 nautical miles