The calculated distance (air line) between Hong Lok Yuen and Tung Chung is approximately 18 miles respectively 29 kilometers.
By car or train, the actual journey to Tung Chung is certainly longer, as only the direct route (as the crow flies) between Hong Lok Yuen and Tung Chung has been calculated here.
Air line (approximately)
29 kilometers
16 nautical miles