The calculated distance (air line) between Khnach Romeas and Kampong Speu is approximately 164 miles respectively 264 kilometers.
By car or train, the actual journey to Kampong Speu is certainly longer, as only the direct route (as the crow flies) between Khnach Romeas and Kampong Speu has been calculated here.
Air line (approximately)
264 kilometers
142 nautical miles