The calculated distance (air line) between Kampong Thom and Stung Treng is approximately 92 miles respectively 148 kilometers.
By car or train, the actual journey to Stung Treng is certainly longer, as only the direct route (as the crow flies) between Kampong Thom and Stung Treng has been calculated here.
Air line (approximately)
148 kilometers
80 nautical miles