The calculated distance (air line) between Ou Ruessei and Phumĭ Tnaôt is approximately 104 miles respectively 167 kilometers.
By car or train, the actual journey to Phumĭ Tnaôt is certainly longer, as only the direct route (as the crow flies) between Ou Ruessei and Phumĭ Tnaôt has been calculated here.
Air line (approximately)
167 kilometers
90 nautical miles