The calculated distance (air line) between Cẩm Phả Mines and Cát Bà is approximately 26 miles respectively 41 kilometers.
By car or train, the actual journey to Cát Bà is certainly longer, as only the direct route (as the crow flies) between Cẩm Phả Mines and Cát Bà has been calculated here.
Air line (approximately)
41 kilometers
22 nautical miles