The calculated distance (air line) between Stung Treng and Gia Nghĩa is approximately 157 miles respectively 252 kilometers.
By car or train, the actual journey to Gia Nghĩa is certainly longer, as only the direct route (as the crow flies) between Stung Treng and Gia Nghĩa has been calculated here.
Air line (approximately)
252 kilometers
136 nautical miles