The calculated distance (air line) between Chhnok Tru and Phnom Penh is approximately 73 miles respectively 117 kilometers.
By car or train, the actual journey to Phnom Penh is certainly longer, as only the direct route (as the crow flies) between Chhnok Tru and Phnom Penh has been calculated here.
Air line (approximately)
117 kilometers
63 nautical miles