The calculated distance (air line) between Sŭngjibaegam and Puryŏng is approximately 74 miles respectively 118 kilometers.
By car or train, the actual journey to Puryŏng is certainly longer, as only the direct route (as the crow flies) between Sŭngjibaegam and Puryŏng has been calculated here.
Air line (approximately)
118 kilometers
64 nautical miles