The calculated distance (air line) between Gia Nghĩa and Svay Rieng is approximately 143 miles respectively 230 kilometers.
By car or train, the actual journey to Svay Rieng is certainly longer, as only the direct route (as the crow flies) between Gia Nghĩa and Svay Rieng has been calculated here.
Air line (approximately)
230 kilometers
124 nautical miles