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