The calculated distance (air line) between Phú Khương and Phnom Penh is approximately 85 miles respectively 136 kilometers.
By car or train, the actual journey to Phnom Penh is certainly longer, as only the direct route (as the crow flies) between Phú Khương and Phnom Penh has been calculated here.
Air line (approximately)
136 kilometers
74 nautical miles