The calculated distance (air line) between Pak Shek Kok and Cheung Chau is approximately 19 miles respectively 30 kilometers.
By car or train, the actual journey to Cheung Chau is certainly longer, as only the direct route (as the crow flies) between Pak Shek Kok and Cheung Chau has been calculated here.
Air line (approximately)
30 kilometers
16 nautical miles