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