The calculated distance (air line) between Tai Mong Tsai and Tung Chung is approximately 24 miles respectively 39 kilometers.
By car or train, the actual journey to Tung Chung is certainly longer, as only the direct route (as the crow flies) between Tai Mong Tsai and Tung Chung has been calculated here.
Air line (approximately)
39 kilometers
21 nautical miles