The calculated distance (air line) between Krong Kep and Sihanoukville is approximately 54 miles respectively 87 kilometers.
By car or train, the actual journey to Sihanoukville is certainly longer, as only the direct route (as the crow flies) between Krong Kep and Sihanoukville has been calculated here.
Air line (approximately)
87 kilometers
47 nautical miles