The calculated distance (air line) between Sai Ying Pun and Cheung Chau is approximately 9 miles respectively 15 kilometers.
By car or train, the actual journey to Cheung Chau is certainly longer, as only the direct route (as the crow flies) between Sai Ying Pun and Cheung Chau has been calculated here.
Air line (approximately)
15 kilometers
8 nautical miles