The calculated distance (air line) between Kampong Speu and Kampong Cham is approximately 74 miles respectively 119 kilometers.
By car or train, the actual journey to Kampong Cham is certainly longer, as only the direct route (as the crow flies) between Kampong Speu and Kampong Cham has been calculated here.
Air line (approximately)
119 kilometers
64 nautical miles