The calculated distance (air line) between Cần Thơ and Sihanoukville is approximately 159 miles respectively 255 kilometers.
By car or train, the actual journey to Sihanoukville is certainly longer, as only the direct route (as the crow flies) between Cần Thơ and Sihanoukville has been calculated here.
Air line (approximately)
255 kilometers
138 nautical miles