The calculated distance (air line) between Tuen Mun San Hui and Lei Tung is approximately 16 miles respectively 26 kilometers.
By car or train, the actual journey to Lei Tung is certainly longer, as only the direct route (as the crow flies) between Tuen Mun San Hui and Lei Tung has been calculated here.
Air line (approximately)
26 kilometers
14 nautical miles