The calculated distance (air line) between Smach Mean Chey and Krong Kep is approximately 114 miles respectively 183 kilometers.
By car or train, the actual journey to Krong Kep is certainly longer, as only the direct route (as the crow flies) between Smach Mean Chey and Krong Kep has been calculated here.
Air line (approximately)
183 kilometers
99 nautical miles